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Find St. Louis to Porto Alegre flights starting at CAD 755.

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip
      • STL09:47
        22h 43m
        2 stops
        POA11:30
        Fri, Dec 20|St. Louis - Porto Alegre|Frontier Airlines
        CAD 755CAD 2,583
        71% OFF
        71% OFF
        CAD 2,583CAD 755

        Choose Frontier Airlines flights from St. Louis to Porto Alegre. The one-way connecting flight with Frontier Airlines departs from St. Louis Lambert International Airport on Fri, Dec 20, arriving at Salgado Filho International Airport. One-way Prices start from CAD 755 including taxes and charges.

      • STL17:28
        22h 22m
        2 stops
        POA18:50
        Tue, Dec 3|St. Louis - Porto Alegre|United Airlines
        CAD 766CAD 2,583
        70% OFF
        70% OFF
        CAD 2,583CAD 766

        Choose United Airlines flights from St. Louis to Porto Alegre. The one-way connecting flight with United Airlines departs from St. Louis Lambert International Airport on Tue, Dec 3, arriving at Salgado Filho International Airport. One-way Prices start from CAD 766 including taxes and charges.

      • STL05:07
        34h 43m
        2 stops
        POA18:50
        Tue, Dec 3|St. Louis - Porto Alegre|American Airlines
        CAD 877CAD 2,583
        66% OFF
        66% OFF
        CAD 2,583CAD 877

        Choose American Airlines flights from St. Louis to Porto Alegre. The one-way connecting flight with American Airlines departs from St. Louis Lambert International Airport on Tue, Dec 3, arriving at Salgado Filho International Airport. One-way Prices start from CAD 877 including taxes and charges.

      • STL17:27
        22h 23m
        2 stops
        POA18:50
        Tue, Dec 3|St. Louis - Porto Alegre|Gol Linhas Aereas Inteligentes
        CAD 886
        CAD 886

        Choose Gol Linhas Aereas Inteligentes flights from St. Louis to Porto Alegre. The one-way connecting flight with Gol Linhas Aereas Inteligentes departs from St. Louis Lambert International Airport on Tue, Dec 3, arriving at Salgado Filho International Airport. One-way Prices start from CAD 886 including taxes and charges.

      • STL10:09
        23h 31m
        2 stops
        POA12:40
        Tue, Dec 3|St. Louis - Porto Alegre|LATAM Airlines
        CAD 923
        CAD 923

        Choose LATAM Airlines flights from St. Louis to Porto Alegre. The one-way connecting flight with LATAM Airlines departs from St. Louis Lambert International Airport on Tue, Dec 3, arriving at Salgado Filho International Airport. One-way Prices start from CAD 923 including taxes and charges.

      • STL16:39
        23h 1m
        2 stops
        POA18:40
        Sun, Dec 15|St. Louis - Porto Alegre|American Airlines
        CAD 1,031
        CAD 1,031

        Choose American Airlines flights from St. Louis to Porto Alegre. The one-way connecting flight with American Airlines departs from St. Louis Lambert International Airport on Sun, Dec 15, arriving at Salgado Filho International Airport. One-way Prices start from CAD 1,031 including taxes and charges.

      • STL16:39
        33h 51m
        2 stops
        POA05:30
        Sun, Dec 15|St. Louis - Porto Alegre|Gol Linhas Aereas Inteligentes
        CAD 1,067
        CAD 1,067

        Choose Gol Linhas Aereas Inteligentes flights from St. Louis to Porto Alegre. The one-way connecting flight with Gol Linhas Aereas Inteligentes departs from St. Louis Lambert International Airport on Sun, Dec 15, arriving at Salgado Filho International Airport. One-way Prices start from CAD 1,067 including taxes and charges.

      • STL11:20
        28h 35m
        2 stops
        POA18:55
        Sun, Dec 15|St. Louis - Porto Alegre|United Airlines
        CAD 1,097
        CAD 1,097

        Choose United Airlines flights from St. Louis to Porto Alegre. The one-way connecting flight with United Airlines departs from St. Louis Lambert International Airport on Sun, Dec 15, arriving at Salgado Filho International Airport. One-way Prices start from CAD 1,097 including taxes and charges.

      • STL06:00
        33h 55m
        2 stops
        POA18:55
        Sun, Dec 15|St. Louis - Porto Alegre|LATAM Airlines
        CAD 1,149
        CAD 1,149

        Choose LATAM Airlines flights from St. Louis to Porto Alegre. The one-way connecting flight with LATAM Airlines departs from St. Louis Lambert International Airport on Sun, Dec 15, arriving at Salgado Filho International Airport. One-way Prices start from CAD 1,149 including taxes and charges.

      • STL11:36
        25h 59m
        2 stops
        POA16:35
        Fri, Dec 20|St. Louis - Porto Alegre|Gol Linhas Aereas Inteligentes
        CAD 1,796
        CAD 1,796

        Choose Gol Linhas Aereas Inteligentes flights from St. Louis to Porto Alegre. The one-way connecting flight with Gol Linhas Aereas Inteligentes departs from St. Louis Lambert International Airport on Fri, Dec 20, arriving at Salgado Filho International Airport. One-way Prices start from CAD 1,796 including taxes and charges.

      • STL13:00
        3h 5m
        Nonstop
        POA14:00
        Mon, Dec 9|St. Louis - Porto Alegre|Frontier Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

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

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Find Cheapest Airlines Flying from St. Louis to Porto Alegre

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From CAD 755
United Airlines
From CAD 766
American Airlines
From CAD 877
Gol Linhas Aereas Inteligentes
From CAD 886
LATAM Airlines
From CAD 923

Find more flights and airlines

Alternative Routes for St. Louis to Porto Alegre Flights

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from St. Louis to Porto Alegre.

  • Cheapest
    Frontier Airlines
    STL
    09:47
    22h 43m
    2 transfer
    POA
    11:30
    St. Louis Lambert International Airport - Salgado Filho International Airport
    Fri, Dec 20Frontier Airlines
    CAD 755
  • Frontier Airlines
    STL
    09:47
    22h 43m
    2 transfer
    POA
    11:30
    St. Louis Lambert International Airport - Salgado Filho International Airport
    Fri, Dec 20Frontier Airlines
    CAD 755
    Find More Flights

FAQ

  • When are flight tickets from St. Louis (STL) to Porto Alegre (POA) the cheapest?

    Airlines adjust prices for flights from St. Louis to Porto Alegre based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much are flights from St. Louis (STL) to Porto Alegre (POA) cost?

    According to Trip.com's data, the lowest price is around CAD 1,078.

  • What is the transportation method from the main airport to downtown in Porto Alegre?

    • The distance from Salgado Filho International Airport to downtown is about 5km, by taxi about 20 minutes.

  • How many airports in Porto Alegre (POA)?

    There are 1 airport(s) in Porto Alegre (POA): Salgado Filho International Airport.

How to find a cheap flight from St. Louis to Porto Alegre

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Porto Alegre. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Information for St. Louis to Porto Alegre Flights

Off-season travel monthDecember
Peak season for travelNovember
Flight distance8,634.81km
Popular airlineAmerican Airlines

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