Flights from STL to Porto Alegre, Brazil
Compare prices from 900+ airlines and find the best deals on flights from STL to POA.*Prices shown are estimated based on historical data.
STL to Porto Alegre, Brazil
Round-trip flights from STL to POA typically cost $774-$967 USD. Prices vary by season, demand, and how far in advance you book. The lowest fares are usually found 6-8 weeks before departure for domestic routes.
Non-stop flights from STL to POA take approximately 13h 19m. Actual flight times vary based on weather, air traffic, and aircraft type. Consider arriving at the airport 2 hours before domestic departures.
Airlines operating STL to POA include LATAM Airlines, Delta Air Lines, Hawaiian Airlines. Each airline offers different fare classes, baggage policies, and loyalty programs. Compare options to find the best value for your travel needs.
The cheapest day to fly STL to POA is typically Tuesday. Mid-week flights are 10-20% cheaper than weekend departures. For best prices, book 6-8 weeks before your trip. Avoid booking less than 2 weeks out when fares spike.
Fares range from $774 to $1451 depending on dates, class, and airline.
Prices based on 500 searches. Updated hourly.
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About Flights from STL to Porto Alegre, Brazil
Looking for cheap flights from STL (STL) to Porto Alegre, Brazil (POA)? You've come to the right place. Fly2Any compares prices from over 900 airlines to help you find the best deals on this popular route.
Flight Information
Flights from STL to POA typically take around 13h 19m. The flight covers a distance of 6571 miles. Multiple airlines operate this route, including LATAM Airlines, Delta Air Lines, Hawaiian Airlines.
Best Time to Book
For the best prices on STL to POA flights, we recommend booking 2-3 months in advance. Prices tend to be lowest for mid-week departures (Tuesday and Wednesday). Use our Price Calendar feature to compare prices across different dates and find the cheapest options.
Price data last updated: April 2026
Airlines on This Route
Several major airlines serve the STL to Porto Alegre, Brazil route, including:
- LATAM Airlines (LA)
- Delta Air Lines (DL)
- Hawaiian Airlines (HA)
Frequently Asked Questions - STL to POA Flights
How long is the flight from STL to Porto Alegre, Brazil?
Direct flights from STL (STL) to Porto Alegre, Brazil (POA) take approximately 13h 19m. Connecting flights may add 2-4 hours depending on layover location. For the fastest journey, look for nonstop flights which are typically available on this popular route.
When is the best time to book STL to POA flights?
For the best prices on STL to POA flights, book 6-8 weeks in advance for domestic routes or 2-4 months ahead for international travel. Domestic flights are typically 20-40% cheaper in off-peak months. Peak season months (July, August) have higher prices, while January and February typically offer the best deals.
What are the cheapest days to fly from STL to Porto Alegre, Brazil?
Tuesday and Wednesday departures are typically 15-25% cheaper than weekend flights on the STL to POA route. Saturday is usually the most expensive day to fly. For additional savings, consider red-eye flights or early morning departures, which often have lower fares and less crowded airports.
Which airlines fly from STL to POA?
Multiple airlines serve the STL to POA route. Compare prices across all carriers using Fly2Any to find the best combination of price, timing, and amenities.
What is the cheapest month to fly from STL to Porto Alegre, Brazil?
The cheapest months to fly from STL to POA are typically January, February, September. Domestic flights are typically 20-40% cheaper in off-peak months. Avoid peak travel periods like July and August when prices can be 30-50% higher. Use Fly2Any's price alerts to get notified when fares drop.
What is the baggage allowance for STL to POA flights?
Baggage allowances vary by airline and fare class. Most full-service carriers include one checked bag (up to 50 lbs) on this route. Budget carriers may charge $25-$60 for checked bags. All airlines allow one personal item free. Compare total costs including baggage fees when booking to get the best deal.
Are there direct flights from STL to Porto Alegre, Brazil?
Yes, several airlines offer nonstop flights from STL to POA. Direct flights take approximately 13h 19m. If you're flexible with your schedule, connecting flights through major hubs like ATL or ORD may offer lower prices.
How much do flights from STL to Porto Alegre, Brazil cost?
Prices for STL to POA flights typically range from $150-$500 roundtrip for economy class, depending on when you book and travel dates. Use Fly2Any to compare all airlines and find current deals. Setting a price alert ensures you never miss a fare drop.
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