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Flights from St. Louis to Porto Alegre
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Flights from St. Louis to Porto Alegre Starting at NZD 911

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
        NZD 911NZD 3,114
        71% OFF
        71% OFF
        NZD 3,114NZD 911

        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 NZD 911 including taxes and charges.

      • STL17:28
        22h 22m
        2 stops
        POA18:50
        Tue, Dec 3|St. Louis - Porto Alegre|United Airlines
        NZD 924NZD 3,114
        70% OFF
        70% OFF
        NZD 3,114NZD 924

        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 NZD 924 including taxes and charges.

      • STL05:07
        34h 43m
        2 stops
        POA18:50
        Tue, Dec 3|St. Louis - Porto Alegre|American Airlines
        NZD 1,057NZD 3,114
        66% OFF
        66% OFF
        NZD 3,114NZD 1,057

        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 NZD 1,057 including taxes and charges.

      • STL17:27
        22h 23m
        2 stops
        POA18:50
        Tue, Dec 3|St. Louis - Porto Alegre|Gol Linhas Aereas Inteligentes
        NZD 1,068
        NZD 1,068

        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 NZD 1,068 including taxes and charges.

      • STL10:09
        23h 31m
        2 stops
        POA12:40
        Tue, Dec 3|St. Louis - Porto Alegre|LATAM Airlines
        NZD 1,113
        NZD 1,113

        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 NZD 1,113 including taxes and charges.

      • STL16:39
        23h 1m
        2 stops
        POA18:40
        Sun, Dec 15|St. Louis - Porto Alegre|American Airlines
        NZD 1,243
        NZD 1,243

        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 NZD 1,243 including taxes and charges.

      • STL16:39
        33h 51m
        2 stops
        POA05:30
        Sun, Dec 15|St. Louis - Porto Alegre|Gol Linhas Aereas Inteligentes
        NZD 1,287
        NZD 1,287

        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 NZD 1,287 including taxes and charges.

      • STL11:20
        28h 35m
        2 stops
        POA18:55
        Sun, Dec 15|St. Louis - Porto Alegre|United Airlines
        NZD 1,323
        NZD 1,323

        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 NZD 1,323 including taxes and charges.

      • STL06:00
        33h 55m
        2 stops
        POA18:55
        Sun, Dec 15|St. Louis - Porto Alegre|LATAM Airlines
        NZD 1,385
        NZD 1,385

        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 NZD 1,385 including taxes and charges.

      • STL11:36
        25h 59m
        2 stops
        POA16:35
        Fri, Dec 20|St. Louis - Porto Alegre|Gol Linhas Aereas Inteligentes
        NZD 2,166
        NZD 2,166

        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 NZD 2,166 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.

Find the best time to fly from St. Louis to Porto Alegre

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

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 NZD 911
United Airlines
From NZD 924
American Airlines
From NZD 1,057
Gol Linhas Aereas Inteligentes
From NZD 1,068
LATAM Airlines
From NZD 1,113

Find more flights and airlines

Alternative Routes from St. Louis to Porto Alegre

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
    NZD 911
  • 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
    NZD 911
    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 departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

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

    According to Trip.com's data, the lowest price is around NZD 1,300.

  • 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 5 km. It takes about 20 minutes by taxi.

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
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Flight Information from St. Louis to Porto Alegre

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

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