$368 Cheap Flights from St. Louis (STL) to Porto Alegre (POA)

View $368 flight on Fri, Jun 13, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Salgado Filho Intl. Airport (POA)

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Find available prices by choosing your travel dates.

Cheap Flights from St. Louis to Porto Alegre (STL-POA)

Prices were available within the past 7 days and start at $368 for one-way flights and $1,075 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

GOL Linhas Aereas S.A.
Tue, May 6 - Sat, May 10
STL
St. Louis
POA
Porto Alegre
$1,075 Roundtrip, found 3 days ago
$1,075
Roundtrip
found 3 days ago
Select GOL Linhas Aereas S.A. flight, departing Tue, May 6 from St. Louis to Porto Alegre, returning Sat, May 10, priced at $1,075 found 3 days ago
GOL Linhas Aereas S.A.
Tue, May 6 - Sat, May 10
STL
St. Louis
POA
Porto Alegre
$1,083 Roundtrip, found 3 days ago
$1,083
Roundtrip
found 3 days ago
Select GOL Linhas Aereas S.A. flight, departing Tue, May 6 from St. Louis to Porto Alegre, returning Sat, May 10, priced at $1,083 found 3 days ago
LATAM Airlines Group
Tue, May 6 - Sat, May 10
STL
St. Louis
POA
Porto Alegre
$1,084 Roundtrip, found 3 days ago
$1,084
Roundtrip
found 3 days ago
Select LATAM Airlines Group flight, departing Tue, May 6 from St. Louis to Porto Alegre, returning Sat, May 10, priced at $1,084 found 3 days ago
LATAM Airlines Group
Tue, May 6 - Sat, May 10
STL
St. Louis
POA
Porto Alegre
$1,089 Roundtrip, found 3 days ago
$1,089
Roundtrip
found 3 days ago
Select LATAM Airlines Group flight, departing Tue, May 6 from St. Louis to Porto Alegre, returning Sat, May 10, priced at $1,089 found 3 days ago
LATAM Airlines Group
Tue, May 6 - Sat, May 10
STL
St. Louis
POA
Porto Alegre
$1,092 Roundtrip, found 3 days ago
$1,092
Roundtrip
found 3 days ago
Select LATAM Airlines Group flight, departing Tue, May 6 from St. Louis to Porto Alegre, returning Sat, May 10, priced at $1,092 found 3 days ago
LATAM Airlines Group
Tue, May 6 - Sat, May 10
STL
St. Louis
POA
Porto Alegre
$1,093 Roundtrip, found 3 days ago
$1,093
Roundtrip
found 3 days ago
Select LATAM Airlines Group flight, departing Tue, May 6 from St. Louis to Porto Alegre, returning Sat, May 10, priced at $1,093 found 3 days ago
GOL Linhas Aereas S.A.
Tue, May 6 - Sat, May 10
STL
St. Louis
POA
Porto Alegre
$1,094 Roundtrip, found 3 days ago
$1,094
Roundtrip
found 3 days ago
Select GOL Linhas Aereas S.A. flight, departing Tue, May 6 from St. Louis to Porto Alegre, returning Sat, May 10, priced at $1,094 found 3 days ago
Air Canada
Tue, May 6 - Sat, May 10
STL
St. Louis
POA
Porto Alegre
$1,148 Roundtrip, found 3 days ago
$1,148
Roundtrip
found 3 days ago
Select Air Canada flight, departing Tue, May 6 from St. Louis to Porto Alegre, returning Sat, May 10, priced at $1,148 found 3 days ago
American Airlines
Sat, Dec 13 - Wed, Dec 31
STL
St. Louis
POA
Porto Alegre
$1,398 Roundtrip, found 3 days ago
$1,398
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, Dec 13 from St. Louis to Porto Alegre, returning Wed, Dec 31, priced at $1,398 found 3 days ago
Delta
Sun, Dec 14 - Thu, Jan 1
STL
St. Louis
POA
Porto Alegre
$1,596 Roundtrip, found 3 days ago
$1,596
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Dec 14 from St. Louis to Porto Alegre, returning Thu, Jan 1, priced at $1,596 found 3 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Salgado Filho Intl. Airport (POA) cost?
Discover the latest flight deals from STL to POA by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from STL to POA?
The cheapest flights from STL to POA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from STL to POA?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from STL to POA. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Salgado Filho Intl. Airport (POA)?
You’ll have to hop on a flight with a layover if you’re traveling from Lambert-St. Louis Intl. Airport (STL) to Salgado Filho Intl. Airport (POA). Direct flights don’t operate daily on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from STL to POA?
Generally you’ll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Salgado Filho Intl. Airport (POA)?
To land at Salgado Filho Intl. Airport (POA) without delays, select a flight that takes off from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Salgado Filho Intl. Airport (POA) last-minute?
Booking your plane ticket from STL to POA right before your trip is typically more expensive. However, if you’re flexible with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a STL to POA flight and hotel package?
Securing a STL to POA flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Choose from our wide range of accommodations and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Salgado Filho Intl. Airport (POA)?
Generally, it’s possible to reschedule or cancel your STL to POA flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and whether any costs are involved. You’ll also find further details on our Customer Service portal.
*Available to One Key members.