HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from St. Louis (STL) to Porto Alegre (POA) from $1,114

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 8/22. 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.
STL — POA
May 21 — May 281
From?
To?
Tue 5/21
Tue 5/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Cheap flight deals from St. Louis to Porto Alegre

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Porto Alegre (POA). 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.

Round-trip from

$734
From Lambert-St Louis to Porto Alegre Salgado Filho
Search Deals

What is the cheapest day to fly round-trip from St. Louis to Porto Alegre?

Leaving on a Wednesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 15% on the overall cost on flights from St. Louis to Porto Alegre.

When is the cheapest time to fly from St. Louis to Porto Alegre (STL - POA)?

One of the essential ways to save on airfare from St. Louis to Porto Alegre is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 11% on airfare.

St. Louis to Porto Alegre 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Porto Alegre 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.
Thu 8/228:05 amSTL - POA
2 stops29h 00mUnited Airlines
Mon 8/266:35 pmPOA - STL
2 stops19h 47mUnited Airlines
Deal found 5/14$1,114
Thu 8/225:05 pmSTL - POA
2 stops24h 15mLATAM Airlines
Mon 8/267:20 amPOA - STL
2 stops37h 54mLATAM Airlines
Deal found 5/15$1,126

Find flights from St. Louis to Porto Alegre within your budget

Customize your flight search to find flights from St. Louis to Porto Alegre 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

$1,114 - $1,126

Route

Depart

Return

Price

Lambert-St LouisPorto Alegre Salgado Filho

STL - POA

STLPOA

Lambert-St Louis

Thu 8/22

2 stops29h 00m

Porto Alegre Salgado Filho

Mon 8/26

2 stops19h 47m

$1,114

Lambert-St LouisPorto Alegre Salgado Filho

STL - POA

STLPOA

Lambert-St Louis

Thu 8/22

2 stops24h 15m

Porto Alegre Salgado Filho

Mon 8/26

2 stops37h 54m

$1,126

Flights are sorted by cheapest first

Deals found on 5/14

When is the cheapest time to fly from St. Louis to Porto Alegre?

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

Average price of flights to Porto Alegre by month

Plan your trip from St. Louis to Porto Alegre by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Porto Alegre is currently $0 while a round-trip flight costs $1,120. Price data was last updated on May 12, 2024.

Currently, May is the cheapest month in which you can book a flight from St. Louis to Porto Alegre (average of $734). Flying from St. Louis to Porto Alegre in December is currently the most expensive (average of $1,235). 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

$1,004

February

$936

March

$831

April

$846

May

$734

June

$823

July

$946

August

$747

September

$881

October

$895

November

$815

December

$1,235

Temperature and rainfall in Porto Alegre by month

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

POA

Temperature

55.4 - 77 °F

Reviews of airlines servicing Porto Alegre

Get insights into the airlines that provide service to Porto Alegre. 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 Porto Alegre. Reviews last updated May 16, 2024.
LATAM Airlines
7.6
Good
2,405 reviews
Check prices

Crew

8.1

Boarding

7.6

Overall

7.6

Food

6.8

Comfort

7.4

Entertainment

7.1

Reviews

1 / 10

I almost lost my connection flight because of tehe delay, but the worst part was that the crew didn’t help me at all

LATAM Airlines
7.6
Good
2,405 reviews
LATAM Airlines
7.6
Good
2,405 reviews
Check prices

Crew

8.1

Boarding

7.6

Overall

7.6

Food

6.8

Comfort

7.4

Entertainment

7.1

Reviews

1 / 10

I almost lost my connection flight because of tehe delay, but the worst part was that the crew didn’t help me at all

United Airlines
7.4
Good
10,924 reviews
LATAM Airlines
7.6
Good
2,405 reviews
Check prices

Crew

8.1

Boarding

7.6

Overall

7.6

Food

6.8

Comfort

7.4

Entertainment

7.1

Reviews

1 / 10

I almost lost my connection flight because of tehe delay, but the worst part was that the crew didn’t help me at all

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Porto Alegre. 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 St. Louis to Porto Alegre for under $1,200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Porto Alegre for under $1,200. The cheapest flight booked recently is on United Airlines for just $1,114, but on average you can expect to pay $1,120.

  • What are the cheapest airlines flying from St. Louis to Porto Alegre round-trip?

    Flying on United Airlines is currently your cheapest option to Porto Alegre, with prices starting at $1,114. Another option worth looking into is LATAM Airlines, starting at $1,126 round trip.

  • What does STL to POA mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Lambert-St Louis Airport to Porto Alegre Salgado Filho Airport flight would often be abbreviated as a STL to POA flight.

  • Can I find deals for flights from St. Louis to Porto Alegre that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Porto Alegre 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 St. Louis to Porto Alegre with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Porto Alegre 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 St. Louis to Porto Alegre that include hotel bookings?

    Yes. In addition to deals on St. Louis to Porto Alegre flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Porto Alegre?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Porto Alegre.

  • Can I find deals for business class flights from St. Louis to Porto Alegre?

    Yes. Cheapflights offers flight deals from St. Louis to Porto Alegre 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 St. Louis to Porto Alegre that allow pets onboard?

    Many airlines flying from St. Louis to Porto Alegre 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 St. Louis to Porto Alegre?

    Yes, you can often find last-minute deals on St. Louis to Porto Alegre 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 St. Louis to Porto Alegre flight deals updated?

    The St. Louis to Porto Alegre flight deals you see on this page were last updated on 5/15.

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.

Complete your trip
Complete your trip to Porto Alegre by adding a car rental and/or hotel reservation to your travel itinerary.

Porto Alegre car rentals
Porto Alegre Salgado Filho Airport car rentals

Top airline flying from St. Louis to Porto Alegre

Discover the top airline that operate flights from St. Louis to Porto Alegre. 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 2,637,452 searches. Data last updated May 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
LATAM AirlinesCheapest$1,246Average$1,299FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
Seattle to San Francisco flights
USA to Switzerland flights
San Francisco to Los Angeles flights
Orlando to Toronto flights
Chicago to Las Vegas flights
Denver to San Francisco flights
Denver to Chicago flights
Denver to Seattle flights
Boston to Aruba flights
Los Angeles to Dallas flights
New York to Mexico City flights
St. Louis to Puerto Plata flights

Search flights from St. Louis to Porto Alegre by cabin class

Find flights from St. Louis to Porto Alegre, 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 Montes Claros
Flights to Girona Costa Brava
Flights to Naxos
Flights to Bourgas
Flights to Hyannis Barnstable
Flights to Samos
Flights to Reggio Calabria Tito Menniti
Flights to Devils Lake
Flights to Ningbo Lishe Intl
Flights to Pellston Emmet County
Flights to Provincetown
Flights to Cortez Montezuma County
Flights to Ohrid
Flights to Oran Es Senia
Flights to Menorca/Mahon
Flights to Hakodate
Flights to Ordu/Giresun
Flights to Laayoune Hassan I
Flights to Cornwall Newquay
Flights to Melilla
Flights to Rennes St Jacques
Flights to Parikia Paros
Flights to Constanţa Mihail Kogalniceanu
Flights to Miyakojima Hirara

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 St. Louis to Porto Alegre?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from St. Louis to Porto Alegre. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Porto Alegre?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Porto Alegre from St. Louis.

Can Cheapflights find flights from St. Louis to Porto Alegre with no change fees?

Yes! Cheapflights helps users easily find flights from St. Louis to Porto Alegre with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to Porto Alegre 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!

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