Cheap flights from St Louis to Seoul

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Flight deals from St Louis to Seoul

Looking for a cheap last-minute deal or the best round-trip flight from St Louis to Seoul? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from St Louis to Seoul

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Seoul flights are currently cheapest in September.

Alternative St Louis to Seoul routes

Looking for the cheapest, fastest or easiest route from St Louis to Seoul? You could fly into the following airports instead.

St Louis to Seoul: Flight information

The things to know before you go.
Cheapest flight foundC$1,343
Cheapest month to flyJanuary

Finding cheap flights from St Louis to Seoul: Frequently asked questions

There are 2 airports in Seoul: Gimpo International and Incheon International.
The best price we found for a round-trip flight from St Louis to Seoul is C$1,343. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Seoul. But we found flights with one or more stops from C$1,343.
There are no flights flying from St Louis to Seoul, as of May 2025.
The cheapest month to fly from St Louis to Seoul is usually May 2025.
If you're flying from St Louis Airport, the cheapest airport near Seoul is Gimpo International – which is 17.1 km away from the center of Seoul. We've found flights to this airport from C$1,343.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Seoul on Monday, January 12, 2026.
No airlines currently offer direct flights between St Louis Airport and Seoul. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seoul but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Seoul is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 15°C. August is typically the warmest month in Seoul, when it usually averages around 28°C. You can expect the least rain in January. The coldest month is January, with temperatures averaging -8°C. The rainiest month is July.
Currently, Japan Airlines offers the cheapest flight tickets to Seoul.

Travelling from Lambert-St. Louis International Airport (STL) to Seoul: what you need to know

  • Lambert-St. Louis International Airport is located in St Louis. Following the UTC+9 timezone, Seoul is 14 hours ahead of St Louis.

  • For a relaxed start to your STL to Seoul flight, leave plenty of time to check in and drop off your luggage. Turning up two hours before international departures and one hour before domestic flights is the general rule.

  • Longer lines at check-in and security are more likely if you're jetting off during high season, so give yourself even more breathing space. A good rule of thumb for peak periods? Get there up to four hours early for international flights and two hours for domestic departures.

  • Stopovers are the ideal opportunity to break up your journey and perhaps even explore a different city. When browsing for flight tickets from STL to Seoul, uncheck the 'Direct flights only' box to see where you can visit along the way. Here are some popular options to consider:

    • O'Hare International Airport (ORD)

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • Dallas/Fort Worth International Airport (DFW)

  • Travelling from central St Louis to STL takes about 35 minutes by public transport. If you ride-share, drive or grab a cab, you'll cover the 16 kilometres in 20 minutes or so, depending on traffic.

  • Looking for a hotel close to STL? If you're catching an early flight from Lambert-St. Louis International Airport to Seoul, these stays set you up for a seamless send-off:

  • 78.04% of flights taking off from Lambert-St. Louis International Airport make it to their destination on time.

  • STL is located at 10701 Lambert International Blvd..

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Seoul

  • The best price we've found for a one-way Lambert-St. Louis International Airport to Seoul flight is C$705. The cheapest price for a return flight is C$1,343. Remember fares may change due to demand at the time of booking.

  • To find cheap flights from STL to Seoul, book in advance. Airlines usually offer lower fares when tickets are first released.

  • If you have flexibility with your trip dates, take advantage of the 'Whole month' search tool. It'll find the lowest price across every month when looking for a Lambert-St. Louis International Airport to Seoul ticket.

  • Save time looking for cheap flights from STL to Seoul by setting up a Price Alert. You'll get an email or push notification on the app when a special offer becomes available.

  • Tailor your flights with filters. Pick your arrival and departure times, total journey duration and airlines. You can also sort results by 'Best,' 'Fastest' or 'Cheapest' flights from Lambert-St. Louis International Airport to Seoul.

Airports in Seoul

Incheon International Airport (ICN)

  • Incheon International Airport (ICN) is about 48 kilometres from central Seoul. How long it takes to get to the centre depends on the time of day. Do a little research before you go.

  • If you're travelling on public transport, expect a journey time of about 1 hour 45 minutes.

  • Look into staying at a hotel near ICN if you're coming in on a late flight from Lambert-St. Louis International Airport to Seoul. Settle into one of these accommodation options and make arrival day easier:

  • Pick up an Incheon International Airport rental car and explore Seoul and beyond with your own wheels. WECAR, Hi Rent A Car and Alamo are top providers to choose from here.

  • Reserving your ride from Incheon International Airport around four weeks ahead of your flight from STL to Seoul can help you lock in the lowest rate.

Gimpo International Airport (GMP)

  • If you're staying in central Seoul (or just want to start sightseeing straight away), the city is around 16 kilometres from Gimpo International Airport (GMP). Look for any information kiosks to point you in the right direction after hopping off your flight from Lambert-St. Louis International Airport to Seoul.

  • The journey will take about 1 hour 5 minutes on public transport.

  • Following your STL to Seoul flight, kick back at a hotel close to GMP. These are some great accommodation options that'll help you slip into relaxation mode:

  • The quickest way to get to where you're going is with a Gimpo International Airport rental car. Pick up a set of wheels from GOGO Rent a Car, Gogo Rental Car Seoul or Hi Rent A Car and get going in the blink of an eye.

  • Get exactly what you want. Booking your ride from GMP one week ahead of time often means lower prices and a wider selection of vehicles.

Best time to go to Seoul

  • Visit Seoul during the high season if you like a busy atmosphere, but remember that prices tend to be higher. Alternatively, book flights from Lambert-St. Louis International Airport to Seoul during the off-season when prices are cheaper and crowds are smaller.

  • When booking your Lambert-St. Louis International Airport to Seoul flight ticket, think about what kind of weather you prefer. August is the warmest month in Seoul, with temperatures ranging from 19ºC (66ºF) to 32ºC (90ºF).

  • If you like cooler conditions, look for a cheap ticket from STL to Seoul in January when temperatures average between -12ºC (10ºF) and 4ºC (39ºF).

More about Seoul

  • Start your Seoul trip off on the right foot by choosing the ideal place to stay. As soon as you've booked your flight from Lambert-St. Louis International Airport to Seoul, check out our range of hotels including:

  • All great adventures should include a little sightseeing. Bukchon Hanok Village, Gyeongbokgung Palace and N Seoul Tower are attractions you won't want to skip in Seoul.

Explore more of South Korea

  • You've seen Seoul, now it's time to discover more of South Korea. Travel around 322 kilometres south-east to Busan to check off its top sights. From Haeundae Beach to Gamcheon Culture Village and Beomeosa Temple, you'll have a full itinerary ahead.

  • Around 241 kilometres south-east of Seoul, Daegu is another essential stop in South Korea. Experience this destination's highlights firsthand at Duryu Park People's Garden, E-World and Apsan Park.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.