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Cheap flights from Basel EuroAirport Swiss (BSL) to Seattle (SEA) from $342

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. 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.
BSL — SEA
May 21 — May 281
From?
To?
Tue 5/21
Tue 5/28
1 adult, Economy
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Cheap flight deals from Basel to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Basel (BSL) to Seattle (SEA). 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 16, 2024.

Popular in

July

Cheapest in

November

Average price

$699

Round-trip from

$247
High demand for flights, 29% potential price rise
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Best time to find cheap flights, 34% potential price drop
Search Deals
Average for round-trip flights in May 2024
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From Basel EuroAirport Swiss to Seattle/Tacoma Intl
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What is the cheapest day to fly round-trip from Basel EuroAirport Swiss to Seattle?

Flights from Basel EuroAirport Swiss to Seattle are found to be more expensive on Friday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Seattle.

What is the cheapest month to fly from Basel EuroAirport Swiss to Seattle?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, January can be a great choice for travel to Seattle. Flights to Seattle from Basel EuroAirport Swiss in January are about $556 on average during January, but can be found for as low as $369.

When is the cheapest time to fly from Basel EuroAirport Swiss to Seattle (BSL - SEA)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Basel EuroAirport Swiss to Seattle as you normally would.

Cheap American Airlines flights from Basel to Seattle

Explore cheap flight options specifically provided by American Airlines for the route between Basel and Seattle. 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 2,637,452 searches. Data last updated May 16, 2024.
Take a look at some of the lowest-priced American Airlines flights heading from Basel to Seattle. Be sure to come back soon if the deals available don't appeal to you at this time.
Mon 6/36:35 amBSL - SEA
1 stop20h 10mAmerican Airlines
Mon 6/101:25 pmSEA - BSL
2 stops24h 30mAmerican Airlines
Deal found 5/15$545
Mon 6/36:35 amBSL - SEA
2 stops21h 56mAmerican Airlines
Mon 6/101:25 pmSEA - BSL
2 stops24h 30mAmerican Airlines
Deal found 5/15$554

Cheap Delta flights from Basel to Seattle

Explore cheap flight options specifically provided by Delta for the route between Basel and Seattle. 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 2,637,452 searches. Data last updated May 16, 2024.
Take a gander at the lowest prices we've found on Delta flights from Basel to Seattle. Check back soon if you're not seeing flights that suit your needs.
Mon 6/36:15 amBSL - SEA
1 stop13h 05mDelta
Mon 6/101:30 pmSEA - BSL
1 stop19h 25mDelta
Deal found 5/15$564
Mon 6/36:15 amBSL - SEA
1 stop19h 20mDelta
Mon 6/106:05 pmSEA - BSL
1 stop14h 50mDelta
Deal found 5/16$566
Thu 8/296:20 amBSL - SEA
1 stop12h 55mDelta
Wed 12/2512:40 pmSEA - BSL
1 stop21h 00mDelta
Deal found 5/16$602
Thu 8/296:20 amBSL - SEA
2 stops17h 25mDelta
Sat 12/2812:40 pmSEA - BSL
1 stop21h 00mDelta
Deal found 5/16$607
Thu 8/296:20 amBSL - SEA
2 stops20h 44mDelta
Tue 12/247:20 amSEA - BSL
2 stops18h 20mDelta
Deal found 5/16$613
Mon 6/1710:15 amBSL - SEA
1 stop15h 20mDelta
Tue 7/27:38 amSEA - BSL
2 stops25h 22mDelta
Deal found 5/15$616
Sat 8/316:20 amBSL - SEA
1 stop12h 55mDelta
Thu 12/2612:40 pmSEA - BSL
1 stop21h 00mDelta
Deal found 5/16$649
Fri 7/266:20 amBSL - SEA
1 stop12h 55mDelta
Tue 8/273:15 pmSEA - BSL
2 stops17h 40mDelta
Deal found 5/16$822
Fri 7/266:20 amBSL - SEA
1 stop12h 55mDelta
Wed 8/2811:50 amSEA - BSL
2 stops17h 00mDelta
Deal found 5/16$1,023

Cheap Basel to Seattle flights in May & June 2024

Find cheap flight options from Basel to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Prices were last updated on May 16, 2024.
Check out some of the best flight deals from Basel to Seattle in 2024. Check back regularly for other flight deals.
Fri 6/146:40 amBSL - SEA
2 stops22h 08mMultiple Airlines
Fri 6/211:25 pmSEA - BSL
2 stops24h 30mMultiple Airlines
Deal found 5/15$499
Fri 6/146:40 amBSL - SEA
1 stop13h 55mMultiple Airlines
Fri 6/215:10 amSEA - BSL
2 stops32h 45mMultiple Airlines
Deal found 5/15$520
Mon 6/36:35 amBSL - SEA
1 stop20h 10mAmerican Airlines
Mon 6/101:25 pmSEA - BSL
2 stops24h 30mAmerican Airlines
Deal found 5/15$545
Mon 6/36:35 amBSL - SEA
2 stops21h 56mAmerican Airlines
Mon 6/101:25 pmSEA - BSL
2 stops24h 30mAmerican Airlines
Deal found 5/15$554
Mon 6/36:15 amBSL - SEA
1 stop13h 05mDelta
Mon 6/101:30 pmSEA - BSL
1 stop19h 25mDelta
Deal found 5/15$564
Mon 6/36:15 amBSL - SEA
1 stop19h 20mDelta
Mon 6/106:05 pmSEA - BSL
1 stop14h 50mDelta
Deal found 5/16$566
Mon 6/36:50 amBSL - SEA
2 stops23h 26mAir Canada
Mon 6/101:10 pmSEA - BSL
2 stops15h 30mAir Canada
Deal found 5/16$573
Mon 6/171:30 pmBSL - SEA
2 stops20h 29mUnited Airlines
Tue 7/28:05 amSEA - BSL
2 stops26h 35mUnited Airlines
Deal found 5/15$586
Mon 6/1710:15 amBSL - SEA
1 stop15h 20mDelta
Tue 7/27:38 amSEA - BSL
2 stops25h 22mDelta
Deal found 5/15$616

Basel to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Basel and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
Check out some of the best flight deals from Basel to Seattle in 2024. Check back regularly for other flight deals.
Fri 6/146:40 amBSL - SEA
2 stops22h 08mMultiple Airlines
Fri 6/211:25 pmSEA - BSL
2 stops24h 30mMultiple Airlines
Deal found 5/15$499
Fri 6/146:40 amBSL - SEA
1 stop13h 55mMultiple Airlines
Fri 6/215:10 amSEA - BSL
2 stops32h 45mMultiple Airlines
Deal found 5/15$520
Mon 6/36:35 amBSL - SEA
1 stop20h 10mAmerican Airlines
Mon 6/101:25 pmSEA - BSL
2 stops24h 30mAmerican Airlines
Deal found 5/15$545
Mon 6/36:35 amBSL - SEA
2 stops21h 56mAmerican Airlines
Mon 6/101:25 pmSEA - BSL
2 stops24h 30mAmerican Airlines
Deal found 5/15$554
Mon 6/36:15 amBSL - SEA
1 stop13h 05mDelta
Mon 6/101:30 pmSEA - BSL
1 stop19h 25mDelta
Deal found 5/15$564
Mon 6/36:15 amBSL - SEA
1 stop19h 20mDelta
Mon 6/106:05 pmSEA - BSL
1 stop14h 50mDelta
Deal found 5/16$566
Mon 6/36:50 amBSL - SEA
2 stops23h 26mAir Canada
Mon 6/101:10 pmSEA - BSL
2 stops15h 30mAir Canada
Deal found 5/16$573
Mon 6/171:30 pmBSL - SEA
2 stops20h 29mUnited Airlines
Tue 7/28:05 amSEA - BSL
2 stops26h 35mUnited Airlines
Deal found 5/15$586
Mon 8/266:50 amBSL - SEA
2 stops21h 02mUnited Airlines
Thu 12/266:50 pmSEA - BSL
1 stop15h 35mUnited Airlines
Deal found 5/16$587

Basel to Seattle flights leaving soon

Find last-minute flight options from Basel to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
Users seeking a last-minute flight from Basel to Seattle should consider booking one of these fares. Users should examine the flight details to ensure there are no surprises.
Wed 5/228:30 amBSL - SEA
2 stops22h 13mMultiple Airlines
Fri 6/1411:05 amSEA - BSL
2 stops21h 35mMultiple Airlines
Deal found 5/15$870
Wed 5/228:30 amBSL - SEA
1 stop13h 45mMultiple Airlines
Fri 6/145:40 pmSEA - BSL
1 stop15h 00mMultiple Airlines
Deal found 5/15$2,452

One-way flights to Seattle from Basel

Search for one-way flight options from Basel to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
Some of the best available deals we've found on one-way flights from Basel to Seattle. Users needing a return flight from Basel to Seattle should utilize the search form above.
Tue 10/157:00 amBSL - SEA
2 stops21h 01mMultiple Airlines
Deal found 5/15$342
Tue 9/39:30 pmBSL - SEA
3 stops44h 15mMultiple Airlines
Deal found 5/15$396
Tue 9/39:30 pmBSL - SEA
2 stops51h 38mMultiple Airlines
Deal found 5/15$413
Thu 10/1710:55 amBSL - SEA
2 stops35h 01mWestJet
Deal found 5/15$609
Tue 10/157:05 pmBSL - SEA
1 stop25h 30mMultiple Airlines
Deal found 5/15$633
Tue 9/36:20 amBSL - SEA
1 stop19h 30mDelta
Deal found 5/15$638
Sun 10/136:15 amBSL - SEA
1 stop13h 20mDelta
Deal found 5/15$639
Mon 10/146:15 amBSL - SEA
2 stops19h 01mDelta
Deal found 5/15$644
Sun 10/1311:10 amBSL - SEA
2 stops19h 01mBritish Airways
Deal found 5/15$649

Find flights from Basel to Seattle within your budget

Customize your flight search to find flights from Basel to Seattle 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 2,637,452 searches. Data last updated May 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$499 - $1,013

Route

Depart

Return

Price

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 6/14

2 stops22h 08m

Seattle/Tacoma Intl

Fri 6/21

2 stops24h 30m

$499

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 6/3

1 stop20h 10m

Seattle/Tacoma Intl

Mon 6/10

2 stops24h 30m

$545

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 6/3

1 stop13h 05m

Seattle/Tacoma Intl

Mon 6/10

1 stop19h 25m

$564

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 6/3

2 stops23h 26m

Seattle/Tacoma Intl

Mon 6/10

2 stops15h 30m

$573

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 6/17

2 stops20h 29m

Seattle/Tacoma Intl

Tue 7/2

2 stops26h 35m

$586

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 7/26

1 stop12h 55m

Seattle/Tacoma Intl

Wed 8/28

1 stop14h 45m

$799

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 7/29

2 stops20h 37m

Seattle/Tacoma Intl

Mon 12/23

1 stop14h 45m

$924

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 7/27

1 stop12h 55m

Seattle/Tacoma Intl

Sun 8/25

1 stop14h 45m

$982

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 7/28

2 stops21h 43m

Seattle/Tacoma Intl

Sun 8/25

1 stop13h 35m

$1,013

Flights are sorted by cheapest first

Deals found on 5/15

When is the cheapest time to fly from Basel EuroAirport Swiss to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Basel to Seattle. Price data was last updated on May 12, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Basel EuroAirport Swiss to Seattle flight should consider departing on Monday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Seattle by month

Plan your trip from Basel to Seattle by taking into account the cheapest months to travel. The average price of a one-way flight from Basel to Seattle is currently $551 while a round-trip flight costs $721. Price data was last updated on May 12, 2024.

Currently, January is the cheapest month in which you can book a flight from Basel EuroAirport Swiss to Seattle (average of $247). Flying from Basel EuroAirport Swiss to Seattle in July is currently the most expensive (average of $407). 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

$247

February

$254

March

$288

April

$294

May

$318

June

$404

July

$407

August

$344

September

$278

October

$256

November

$258

December

$248

Temperature and rainfall in Seattle by month

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

SEA

Temperature

41 - 66.2 °F

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated May 16, 2024.
To help decide which airline to fly from Basel to Seattle, see what other customers have to say about American Airlines, Delta and Air Canada. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.0
Very good
10,673 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

KLM
7.9
Good
1,568 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Air France
7.6
Good
1,764 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

WestJet
7.5
Good
2,919 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

United Airlines
7.4
Good
10,924 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Related info for your journey

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

  • Can I find flights from Basel EuroAirport Swiss to Seattle for under $500 on Cheapflights?

    Yes, there are multiple flights from Basel EuroAirport Swiss to Seattle for under $500. The cheapest flight booked recently is on Multiple Airlines for just $499, but on average you can expect to pay $594.

  • Are there last-minute flights available from Basel EuroAirport Swiss to Seattle for under $900?

    There are currently 2+ open flights from Basel EuroAirport Swiss to Seattle within the next 7 days for less than $900.

  • What are the cheapest airlines flying from Basel EuroAirport Swiss to Seattle round-trip?

    American Airlines, at $545, was found to be the cheapest airline from Basel EuroAirport Swiss to Seattle.Alternate airlines to your destination round-trip include Delta and Air Canada. American Airlines is priced at 15% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Basel EuroAirport Swiss to Seattle one-way?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as $609. Users have also found prices from $638 and $649 on Delta and British Airways, respectively.

  • What does BSL to SEA mean?

    BSL and SEA are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. BSL to SEA refers to a flight route from Basel EuroAirport Swiss to Seattle/Tacoma Intl Airport.

  • Can I find deals for flights from Basel to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your Basel to Seattle 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 Basel to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter Basel to Seattle 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 Basel to Seattle that include hotel bookings?

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

  • How can I find direct flights from Basel to Seattle?

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

  • Can I find deals for business class flights from Basel to Seattle?

    Yes. Cheapflights offers flight deals from Basel to Seattle 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 Basel to Seattle that allow pets onboard?

    Many airlines flying from Basel to Seattle 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 Basel to Seattle?

    Yes, you can often find last-minute deals on Basel to Seattle 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 Basel EuroAirport Swiss to Seattle flight deals updated?

    The Basel EuroAirport Swiss to Seattle flight deals you see on this page were last updated on 5/16.

See more FAQs

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See prices for flight routes from nearby airports that may be better suited for you.

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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 Basel to Seattle?

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Yes, we can. To see specific flights from Basel to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Basel to Seattle become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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