Cheap Flights from St. Louis to Porto from KRW 756,415️ 2024

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Find St. Louis to Porto flights starting at KRW 756,415.

Book one-way or return flights from St. Louis to Porto from as little as KRW 756,415. Choose from the popular airlines below and book your flight today!

One way
Round-trip

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

Searching for the best last minute flight from St. Louis to Porto? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from St. Louis to Porto. Stay updated on price trends and snag the best deals for your upcoming trip.

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

View airlines operating flights from St. Louis to Porto. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

American Airlines

From KRW 717,736

United Airlines

From KRW 730,755

Delta Air Lines

From KRW 806,038

Lufthansa

From KRW 838,679

Iberia

From KRW 849,057

Air Canada

From KRW 980,377

British Airways

From KRW 1,090,566

Air France

From KRW 1,168,491

KLM

From KRW 1,187,736

Brussels Airlines

From KRW 1,188,491

ANA airlines

Find more flights and airlines

Alternative Routes for St. Louis to Porto Flights

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from St. Louis to Porto.

Cheapest
STL
10:25
19h 15m
2 transfer
OPO
11:40
St. Louis Lambert International Airport - Francisco Sa Carneiro International Airport
Wed, Aug 28American Airlines
KRW 717,736
STL
10:25
19h 15m
2 transfer
OPO
11:40
St. Louis Lambert International Airport - Francisco Sa Carneiro International Airport
Wed, Aug 28American Airlines
KRW 717,736
Find More Flights

How do I find the cheapest flights?

When are flight tickets from St. Louis (STL) to Porto (OPO) the cheapest?
Airlines adjust prices for flights from St. Louis to Porto 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 (OPO) cost?
According to Trip.com's data, the lowest price is around KRW 2,518,113.
What is the transportation method from the main airport to downtown in Porto?
- The distance from Francisco Sa Carneiro International Airport to downtown is about 9km, by taxi about 20 minutes.
How many airports in Porto (OPO)?
There are 1 airport(s) in Porto (OPO): Francisco Sa Carneiro International Airport.

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

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. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com