HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Minneapolis (MSP) to Düsseldorf from $833

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
MSP — DUS
May 11 — May 181
From?
To?
Sat 5/11
Sat 5/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Cheap flight deals from Minneapolis to Düsseldorf

Discover tips and strategies to find the most affordable flight options for your journey from Minneapolis (MSP) to Düsseldorf (DU1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 6, 2024.

Popular in

December

Cheapest in

November

Average price

$1,319

Round-trip from

$641
High demand for flights, 39% potential price rise
Search Deals
Best time to find cheap flights, 21% potential price drop
Search Deals
Average for round-trip flights in May 2024
Search Deals
From Minneapolis St Paul to Düsseldorf
Search Deals

What is the cheapest day to fly round-trip from Minneapolis to Düsseldorf?

It’s generally more expensive to depart on a Tuesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

What is the cheapest month to fly from Minneapolis to Düsseldorf?

November is one of the best times of the year to fly to Düsseldorf from Minneapolis. Prices for November average $1,263 per person but you can even find prices for as low as $931. The most expensive prices can be found in the month of December. Opting for a November flight can save you 63% on your journey compared to booking in December

When is the cheapest time to fly from Minneapolis to Düsseldorf (MSP - DUS)?

It’s typically best to fly out from Minneapolis to Düsseldorf at noon. Doing so could potentially save you 13% on the flight price compared to flying in the evening, which is usually more expensive.

Cheap Air France flights from Minneapolis to Düsseldorf

Explore cheap flight options specifically provided by Air France for the route between Minneapolis and Düsseldorf. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,689,106 searches. Data last updated May 6, 2024.
Take a look at some of the lowest-priced Air France flights heading from Minneapolis to Düsseldorf. Deals update often to give you more flight options matching your criteria
Tue 9/174:35 pmMSP - DUS
1 stop19h 10mAir France
Fri 9/276:40 amDUS - MSP
1 stop13h 10mAir France
Deal found 5/5$1,003
Thu 7/114:35 pmMSP - DUS
1 stop19h 10mAir France
Tue 7/307:25 pmDUS - MSP
1 stop24h 10mAir France
Deal found 5/5$1,119
Tue 6/117:50 pmMSP - DUS
1 stop12h 50mAir France
Mon 6/177:25 pmDUS - MSP
1 stop24h 00mAir France
Deal found 5/5$1,285
Thu 6/64:20 pmMSP - DUS
1 stop16h 20mAir France
Wed 6/269:05 amDUS - MSP
1 stop15h 35mAir France
Deal found 5/5$1,324
Fri 5/317:40 pmMSP - DUS
1 stop14h 40mAir France
Wed 6/126:40 amDUS - MSP
1 stop18h 00mAir France
Deal found 5/5$7,694

Cheap Delta flights from Minneapolis to Düsseldorf

Explore cheap flight options specifically provided by Delta for the route between Minneapolis and Düsseldorf. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,689,106 searches. Data last updated May 6, 2024.
Have a look at some of the cheapest available Delta flights departing from Minneapolis and landing in Düsseldorf. Check back soon if you're not seeing flights that suit your needs.
Tue 9/312:59 pmMSP - DUS
2 stops16h 51mDelta
Tue 10/296:40 amDUS - MSP
1 stop13h 25mDelta
Deal found 5/5$1,007
Tue 9/35:30 pmMSP - DUS
1 stop17h 10mDelta
Tue 10/296:40 amDUS - MSP
1 stop13h 25mDelta
Deal found 5/5$1,015
Thu 7/113:50 pmMSP - DUS
2 stops15h 10mDelta
Tue 7/306:20 amDUS - MSP
1 stop13h 05mDelta
Deal found 5/5$1,127
Thu 6/67:50 pmMSP - DUS
1 stop12h 50mDelta
Wed 6/269:05 amDUS - MSP
2 stops18h 44mDelta
Deal found 5/5$1,334

Cheap Minneapolis to Düsseldorf flights in May & June 2024

Find cheap flight options from Minneapolis to Düsseldorf specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,689,106 searches. Prices were last updated on May 6, 2024.
These are some of the most attractive deals on flights from Minneapolis to Düsseldorf in 2024. Check back in a little while for more flight options.
Sun 5/267:15 pmMSP - DUS
1 stop12h 05mMultiple Airlines
Tue 6/118:35 amDUS - MSP
1 stop15h 40mMultiple Airlines
Deal found 5/5$904
Sun 5/261:21 pmMSP - DUS
2 stops14h 44mMultiple Airlines
Tue 6/1110:10 amDUS - MSP
2 stops20h 48mMultiple Airlines
Deal found 5/5$928
Fri 5/177:35 pmMSP - DUS
1 stop11h 55mMultiple Airlines
Fri 5/3110:45 amDUS - MSP
1 stop13h 25mMultiple Airlines
Deal found 5/5$937
Fri 5/177:35 pmMSP - DUS
1 stop15h 15mMultiple Airlines
Fri 5/318:35 amDUS - MSP
2 stops22h 07mMultiple Airlines
Deal found 5/5$970
Sun 5/267:15 pmMSP - DUS
1 stop12h 05mMultiple Airlines
Tue 6/118:35 amDUS - MSP
2 stops21h 27mMultiple Airlines
Deal found 5/5$981
Tue 6/117:15 pmMSP - DUS
1 stop12h 05mMultiple Airlines
Mon 6/179:05 pmDUS - MSP
2 stops47h 29mMultiple Airlines
Deal found 5/5$1,090
Fri 5/317:35 pmMSP - DUS
1 stop15h 15mMultiple Airlines
Tue 6/118:35 amDUS - MSP
1 stop15h 40mMultiple Airlines
Deal found 5/5$1,130
Tue 6/116:40 amMSP - DUS
3 stops31h 50mMultiple Airlines
Mon 6/176:10 amDUS - MSP
2 stops19h 00mMultiple Airlines
Deal found 5/5$1,169
Fri 5/317:35 pmMSP - DUS
1 stop11h 55mMultiple Airlines
Tue 6/118:35 amDUS - MSP
2 stops21h 27mMultiple Airlines
Deal found 5/5$1,200

Minneapolis to Düsseldorf 2024 flight deals

Discover exclusive flight deals for travel between Minneapolis and Düsseldorf in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,689,106 searches. Data last updated May 6, 2024.
These are some of the most attractive deals on flights from Minneapolis to Düsseldorf in 2024. Check back in a little while for more flight options.
Tue 9/1010:25 amMSP - DUS
2 stops18h 20mMultiple Airlines
Tue 11/510:00 amDUS - MSP
2 stops17h 39mMultiple Airlines
Deal found 5/5$833
Tue 9/1012:29 pmMSP - DUS
2 stops16h 11mUnited Airlines
Tue 11/58:50 amDUS - MSP
1 stop11h 40mUnited Airlines
Deal found 5/5$873
Sun 5/267:15 pmMSP - DUS
1 stop12h 05mMultiple Airlines
Tue 6/118:35 amDUS - MSP
1 stop15h 40mMultiple Airlines
Deal found 5/5$904
Sun 5/261:21 pmMSP - DUS
2 stops14h 44mMultiple Airlines
Tue 6/1110:10 amDUS - MSP
2 stops20h 48mMultiple Airlines
Deal found 5/5$928
Tue 9/1710:25 amMSP - DUS
2 stops18h 20mMultiple Airlines
Fri 9/2710:10 amDUS - MSP
2 stops20h 00mMultiple Airlines
Deal found 5/5$933
Fri 5/177:35 pmMSP - DUS
1 stop11h 55mMultiple Airlines
Fri 5/3110:45 amDUS - MSP
1 stop13h 25mMultiple Airlines
Deal found 5/5$937
Tue 9/312:45 pmMSP - DUS
2 stops17h 20mMultiple Airlines
Tue 10/2910:00 amDUS - MSP
2 stops19h 56mMultiple Airlines
Deal found 5/5$961
Fri 5/177:35 pmMSP - DUS
1 stop15h 15mMultiple Airlines
Fri 5/318:35 amDUS - MSP
2 stops22h 07mMultiple Airlines
Deal found 5/5$970
Sun 5/267:15 pmMSP - DUS
1 stop12h 05mMultiple Airlines
Tue 6/118:35 amDUS - MSP
2 stops21h 27mMultiple Airlines
Deal found 5/5$981

Find flights from Minneapolis to Düsseldorf within your budget

Customize your flight search to find flights from Minneapolis to Düsseldorf that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,689,106 searches. Data last updated May 6, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$833 - $1,330

Route

Depart

Return

Price

Minneapolis St PaulDuesseldorf Intl

MSP - DUS

MSPDUS

Minneapolis St Paul

Tue 9/10

2 stops18h 20m

Duesseldorf Intl

Tue 11/5

2 stops17h 39m

$833

Minneapolis St PaulDuesseldorf Intl

MSP - DUS

MSPDUS

Minneapolis St Paul

Tue 9/10

2 stops16h 11m

Duesseldorf Intl

Tue 11/5

1 stop11h 40m

$873

Minneapolis St PaulDuesseldorf Intl

MSP - DUS

MSPDUS

Minneapolis St Paul

Sun 5/26

1 stop12h 05m

Duesseldorf Intl

Tue 6/11

1 stop15h 40m

$904

Minneapolis St PaulDuesseldorf Intl

MSP - DUS

MSPDUS

Minneapolis St Paul

Tue 9/17

1 stop19h 10m

Duesseldorf Intl

Fri 9/27

1 stop13h 10m

$1,003

Minneapolis St PaulDuesseldorf Intl

MSP - DUS

MSPDUS

Minneapolis St Paul

Tue 9/3

2 stops16h 51m

Duesseldorf Intl

Tue 10/29

1 stop13h 25m

$1,007

Minneapolis St PaulDuesseldorf Intl

MSP - DUS

MSPDUS

Minneapolis St Paul

Tue 9/3

1 stop17h 10m

Duesseldorf Intl

Tue 10/29

1 stop13h 25m

$1,015

Minneapolis St PaulDuesseldorf Intl

MSP - DUS

MSPDUS

Minneapolis St Paul

Tue 9/10

2 stops18h 50m

Duesseldorf Intl

Tue 11/5

3 stops18h 28m

$1,063

Minneapolis St PaulDuesseldorf Intl

MSP - DUS

MSPDUS

Minneapolis St Paul

Thu 7/11

2 stops16h 48m

Duesseldorf Intl

Tue 7/30

2 stops16h 50m

$1,096

Minneapolis St PaulDuesseldorf Intl

MSP - DUS

MSPDUS

Minneapolis St Paul

Thu 6/6

2 stops14h 29m

Duesseldorf Intl

Wed 6/26

2 stops28h 28m

$1,330

Flights are sorted by cheapest first

Deals found on 5/5

When is the cheapest time to fly from Minneapolis to Düsseldorf?

Use this chart to determine the cheapest time to fly round-trip from Minneapolis to Düsseldorf. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Minneapolis to Düsseldorf flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Düsseldorf by month

Plan your trip from Minneapolis to Düsseldorf by taking into account the cheapest months to travel. The average price of a one-way flight from Minneapolis to Düsseldorf is currently $0 while a round-trip flight costs $1,014. Price data was last updated on April 28, 2024.

Currently, November is the cheapest month in which you can book a flight from Minneapolis to Düsseldorf (average of $641). Flying from Minneapolis to Düsseldorf in July is currently the most expensive (average of $1,159). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$663

February

$659

March

$834

April

$795

May

$880

June

$1,154

July

$1,159

August

$974

September

$810

October

$722

November

$641

December

$679

Temperature and rainfall in Düsseldorf by month

Plan your trip to Düsseldorf by taking into account the average temperature and rainfall totals by month.

DUS

Temperature

33.8 - 64.4 °F

Reviews of airlines servicing Düsseldorf

Get insights into the airlines that provide service to Düsseldorf. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Düsseldorf. Reviews last updated May 6, 2024.
To help decide which airline to fly from Minneapolis to Düsseldorf, see what other customers have to say about Air France, Delta and TAP AIR PORTUGAL. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,818 reviews
Check prices

Food

7.4

Overall

8.1

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.1
Very good
10,818 reviews
Delta
8.1
Very good
10,818 reviews
Check prices

Food

7.4

Overall

8.1

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

SWISS
7.8
Good
2,013 reviews
Delta
8.1
Very good
10,818 reviews
Check prices

Food

7.4

Overall

8.1

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Air France
7.5
Good
1,783 reviews
Delta
8.1
Very good
10,818 reviews
Check prices

Food

7.4

Overall

8.1

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

United Airlines
7.4
Good
11,090 reviews
Delta
8.1
Very good
10,818 reviews
Check prices

Food

7.4

Overall

8.1

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

American Airlines
7.3
Good
14,697 reviews
Delta
8.1
Very good
10,818 reviews
Check prices

Food

7.4

Overall

8.1

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Minneapolis to Düsseldorf. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Minneapolis to Düsseldorf?

    For a flight from Minneapolis to Düsseldorf, you will be flying from Minneapolis St Paul. Minneapolis St Paul (MSP) is just 7.3 mi from the center of the city. Minneapolis St Paul is the only Minneapolis airport and it handles 0 outbound flights to Düsseldorf per day. 3 airlines have flights to Düsseldorf from Minneapolis St Paul on a regular basis.

  • Can I find flights from Minneapolis to Düsseldorf for under $900 on Cheapflights?

    Yes, there are multiple flights from Minneapolis to Düsseldorf for under $900. The cheapest flight booked recently is on Multiple Airlines for just $833, but on average you can expect to pay $1,016.

  • What are the cheapest airlines flying from Minneapolis to Düsseldorf round-trip?

    According to our current data, United Airlines ($873), Air France ($1,003), and Delta ($1,007) offers the cheapest pricing from Minneapolis to Düsseldorf. Users have found that United Airlines is 30% cheaper than the other options available to this destination.

  • What are the most popular airlines that fly from Minneapolis to Düsseldorf?

    Before booking your flight from Minneapolis to Düsseldorf check out the most popular airlines for this route: Delta, KLM or Scandinavian Airlines.

  • What does MSP to DUS mean?

    Minneapolis St Paul Airport is MSP and Duesseldorf Intl Airport is DUS. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Cologne Köln/Bonn Airport (CGN), Dortmund Airport (DTM), Muenster Airport (FMO), Düsseldorf Weeze Airport (NRN), Paderborn Airport (PAD).

  • Can I find deals for flights from Minneapolis to Düsseldorf that include extra baggage allowance?

    The amount of baggage you can bring on your Minneapolis to Düsseldorf flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Minneapolis to Düsseldorf with specific airlines?

    Yes, Cheapflights allows you to browse and filter Minneapolis to Düsseldorf flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Minneapolis to Düsseldorf that include hotel bookings?

    Yes. In addition to deals on Minneapolis to Düsseldorf flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Minneapolis to Düsseldorf?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Minneapolis to Düsseldorf.

  • Can I find deals for business class flights from Minneapolis to Düsseldorf?

    Yes. Cheapflights offers flight deals from Minneapolis to Düsseldorf by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Minneapolis to Düsseldorf that allow pets onboard?

    Many airlines flying from Minneapolis to Düsseldorf offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Minneapolis to Düsseldorf?

    Yes, you can often find last-minute deals on Minneapolis to Düsseldorf flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Minneapolis to Düsseldorf flight deals updated?

    The Minneapolis to Düsseldorf flight deals you see on this page were last updated on 5/5.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Minneapolis to Düsseldorf
See prices for flight routes from nearby airports that may be better suited for you.

Minneapolis to Frankfurt flights
Minneapolis to Munich flights
Minneapolis to Berlin flights
Minneapolis to Duesseldorf Intl flights
Minneapolis to Hamburg flights
Minneapolis to Stuttgart flights
Minneapolis to Bremen flights
Minneapolis to Nuremberg flights
Minneapolis to Cologne flights
Minneapolis to Hannover flights
Minneapolis to Dresden flights
Minneapolis to Leipzig flights
Minneapolis to Saarbruecken flights

Top 3 airlines flying from Minneapolis to Düsseldorf

Discover the top 3 airlines that operate flights from Minneapolis to Düsseldorf. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,689,106 searches. Data last updated May 6, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$709Average$1,239FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest$883Average$1,299FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
KLMCheapest$948Average$1,128FlexibilityNo cancel feeOn-time75%
Search KLM flights
Chicago to San Francisco flights
Los Angeles to Hawaii flights
Boston to London flights
New York John F Kennedy Intl Airport to London Heathrow Airport flights
Minneapolis to Phoenix flights
Fresno to Las Vegas flights
Los Angeles to Chicago flights
Los Angeles to Salt Lake City flights
Boston to Mumbai flights
Oakland, California to Los Angeles flights
Baltimore to Atlanta flights
Minneapolis to Durham flights

Search flights from Minneapolis to Düsseldorf by cabin class

Find flights from Minneapolis to Düsseldorf, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Saint Peter Jersey
Flights to Kirkwall Arpt
Flights to Skiathos
Flights to Naxos
Flights to Ningbo Lishe Intl
Flights to Edremit/Korfez
Flights to Bourgas
Flights to Bodø
Flights to Pellston Emmet County
Flights to Cornwall Newquay
Flights to Ordu/Giresun
Flights to Batumi
Flights to Mason City
Flights to Biarritz Parme
Flights to Zakynthos Dionsios Salomos
Flights to Cortez Montezuma County
Flights to Clermont-Ferrand Aulnat
Flights to Nevsehir
Flights to Hyannis Barnstable
Flights to Girona Costa Brava
Flights to Kagoshima
Flights to Perugia Sant Egidio
Flights to Oran Es Senia
Flights to Chios

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Minneapolis to Düsseldorf?

Cheapflights helps you search for flights from Minneapolis to Düsseldorf via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Minneapolis to Düsseldorf?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Minneapolis to Düsseldorf.

Can Cheapflights find flights from Minneapolis to Düsseldorf with no change fees?

Yes! Cheapflights helps users easily find flights from Minneapolis to Düsseldorf with no change fees.

Can Cheapflights notify me if prices for flights from Minneapolis to Düsseldorf become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Düsseldorf from Minneapolis today and book when prices fit your budget.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines