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Cheap Flights from St Louis to Seoul

Compare St Louis to Seoul flight deals

Find the cheapest month or even day of the year to fly to Seoul

Book the best Seoul fare with no extra fees

Flight deals from St Louis to Seoul

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Seoul? If you want to travel next month, return fares start from $2,487. Find the lowest prices on one-way and return tickets right here.
Seoul.$2,051 per passenger.Departing Wed, 30 Sep, returning Wed, 4 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Wed, 30 Sep, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Wed, 4 Nov, arriving in St Louis.Price includes taxes and charges.From $2,051, select.
Seoul.$2,051 per passenger.Departing Wed, 30 Sep, returning Wed, 28 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Wed, 30 Sep, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Wed, 28 Oct, arriving in St Louis.Price includes taxes and charges.From $2,051, select.
Seoul.$2,062 per passenger.Departing Wed, 21 Oct, returning Wed, 11 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Wed, 21 Oct, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Wed, 11 Nov, arriving in St Louis.Price includes taxes and charges.From $2,062, select.
Seoul.$2,079 per passenger.Departing Mon, 1 Mar, returning Thu, 11 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Mon, 1 Mar, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Thu, 11 Mar, arriving in St Louis.Price includes taxes and charges.From $2,079, select.
Seoul.$2,089 per passenger.Departing Wed, 9 Sep, returning Wed, 16 Sep.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Wed, 9 Sep, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Wed, 16 Sep, arriving in St Louis.Price includes taxes and charges.From $2,089, select.
Seoul.$2,138 per passenger.Departing Wed, 5 Aug, returning Fri, 14 Aug.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Wed, 5 Aug, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Fri, 14 Aug, arriving in St Louis.Price includes taxes and charges.From $2,138, select.
Seoul.$2,142 per passenger.Departing Wed, 11 Nov, returning Thu, 26 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Wed, 11 Nov, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Thu, 26 Nov, arriving in St Louis.Price includes taxes and charges.From $2,142, select.
Seoul.$2,146 per passenger.Departing Thu, 6 Aug, returning Sun, 27 Sep.Return flight with WestJet.Outbound indirect flight with WestJet, departs from St Louis on Thu, 6 Aug, arriving in Incheon International.Inbound indirect flight with WestJet, departs from Incheon International on Sun, 27 Sep, arriving in St Louis.Price includes taxes and charges.From $2,146, select.
Seoul.$2,167 per passenger.Departing Fri, 2 Apr, returning Fri, 9 Apr.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Fri, 2 Apr, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Fri, 9 Apr, arriving in St Louis.Price includes taxes and charges.From $2,167, select.
Seoul.$2,192 per passenger.Departing Mon, 5 Oct, returning Sun, 11 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Mon, 5 Oct, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Sun, 11 Oct, arriving in St Louis.Price includes taxes and charges.From $2,192, select.
Seoul.$2,215 per passenger.Departing Sat, 1 Aug, returning Thu, 1 Oct.Return flight with WestJet.Outbound indirect flight with WestJet, departs from St Louis on Sat, 1 Aug, arriving in Incheon International.Inbound indirect flight with WestJet, departs from Incheon International on Thu, 1 Oct, arriving in St Louis.Price includes taxes and charges.From $2,215, select.
Seoul.$2,242 per passenger.Departing Thu, 25 Feb, returning Thu, 18 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Thu, 25 Feb, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Thu, 18 Mar, arriving in St Louis.Price includes taxes and charges.From $2,242, select.
Seoul.$2,391 per passenger.Departing Sun, 28 Jun, returning Wed, 8 Jul.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Sun, 28 Jun, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Wed, 8 Jul, arriving in St Louis.Price includes taxes and charges.From $2,391, select.
Seoul.$2,395 per passenger.Departing Fri, 31 Jul, returning Thu, 1 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Fri, 31 Jul, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Thu, 1 Oct, arriving in St Louis.Price includes taxes and charges.From $2,395, select.
Seoul.$2,415 per passenger.Departing Thu, 30 Jul, returning Mon, 10 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Thu, 30 Jul, arriving in Incheon International.Inbound indirect flight with Delta, departs from Incheon International on Mon, 10 Aug, arriving in St Louis.Price includes taxes and charges.From $2,415, select.
Seoul.$2,420 per passenger.Departing Thu, 30 Jul, returning Tue, 1 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Thu, 30 Jul, arriving in Incheon International.Inbound indirect flight with Delta, departs from Incheon International on Tue, 1 Sep, arriving in St Louis.Price includes taxes and charges.From $2,420, select.

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 March.
Jun
from $2,498
Jul
from $2,487
Aug
from $2,138
Sep
from $2,089
Oct
from $2,192
Nov
from $2,142
Dec
from $2,668
Jan
Find prices
Feb
Find prices
Mar
from $2,079
Apr
from $2,167
May
from $2,515

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.

Gimpo International

17km from central Seoul
Closest
from $2,468
Search flights

Incheon International

48km from central Seoul
Cheapest
from $2,051
Search flights

St Louis to Seoul: Flight information

The things to know before you go.
Cheapest flight found$2,051
Cheapest month to flySeptember

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 return flight from St Louis to Seoul is $2,051. 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 $2,051.
As of June 2026, there are no flights flying from St Louis to Seoul.
The cheapest month to fly from St Louis to Seoul is usually September.
If you're flying from St Louis Airport, the cheapest airport near Seoul is Incheon International – which is 47.8 km away from the centre of Seoul. We've found flights into this airport from $2,051.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Seoul on Wednesday, 30 September 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 June, the average temperature is usually around 20°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, Air Canada offers the cheapest flight tickets to Seoul.

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

  • The timezone in Seoul is UTC+9. The city is 15 hours ahead of St Louis, where St Louis Lambert International Airport is located.

  • To avoid rushing for your STL to Seoul flight, leave enough time to check in and drop off your luggage. Turning up two hours ahead of international departures and an hour before domestic flights is the standard rule.

  • You can expect longer queues during popular months like July. Arriving up to four hours ahead of international flights and two hours for a domestic departure will give you plenty of time for security and boarding.

  • Consider adding a stopover to potentially land a cheaper plane ticket from STL to Seoul. All you need to do is uncheck 'Direct flights only' during your search. Break up your trip (and maybe save some cash) by stopping at one of these popular options:

    • Chicago O'Hare International Airport (ORD)

    • Atlanta Hartsfield-Jackson International Airport (ATL)

    • Dallas Fort Worth International Airport (DFW)

  • STL is about 16 kilometres from central St Louis. If you're ride-sharing, catching a taxi or driving from the centre, it'll take 25 minutes or so to get there, depending on the traffic. If you're using public transport, expect the trip time to be around 30 minutes.

  • Have an early flight from St Louis Lambert International Airport to Seoul? Avoid the stress of rushing to the airport (and sneak in some extra snooze time) by choosing one of these stays near STL:

  • 76% of flights departing from St Louis Lambert International Airport arrive at their destination on time.

  • STL is located at 10701 Lambert International Blvd..

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

  • $982 is the cheapest price we've seen for a one-way St Louis Lambert International Airport to Seoul flight. A round-trip ticket right now is $2,051. Depending on when you want to go and the availability, these fares could change.

  • Booking in advance is often the key to scoring a cheap flight from STL to Seoul. Flight prices rise as demand increases, so the closer your departure date, the more you'll likely pay.

  • The 'Whole month' tool will show you the cheapest tickets from St Louis Lambert International Airport to Seoul across the entire month. It's an easy way to snap up a bargain if your trip dates are flexible.

  • Stay on top of deals for cheap flights from STL to Seoul by setting up a Price Alert. You'll receive an email or notification on the app when fares go down.

  • Choose your preferred departure and arrival times, airlines and number of stops with our filters. Then, sort the results for your flight from St Louis Lambert International Airport to Seoul by 'Best,' 'Cheapest' or 'Fastest.'

Airports in Seoul

Seoul Incheon International Airport (ICN)

  • Seoul Incheon International Airport (ICN) to the centre of Seoul takes about 1 hour 5 minutes to reach by car. The centre is roughly 48 kilometres away.

  • If you're taking public transport, expect a journey time of around 50 minutes.

  • The last thing you want is a lengthy journey to your hotel if you're getting in late on a flight from St Louis Lambert International Airport to Seoul. Book one of these accommodation options near ICN instead:

  • To lock in the lowest price, book your vehicle from Seoul Incheon International Airport around four weeks ahead of your flight from STL to Seoul.

Seoul Gimpo International Airport (GMP)

  • Central Seoul is around 16 kilometres from Seoul Gimpo International Airport (GMP). After your flight from St Louis Lambert International Airport to Seoul has touched down and you've made your way out of the airport, expect a drive of around 30 minutes.

  • You can expect the trip to take roughly 35 minutes on public transport.

  • Hang up the 'Do not disturb' sign and unwind at a hotel close to GMP. Here are a few options where you can check in after your STL to Seoul flight:

  • Call dibs on the best options. Securing your ride from GMP one week in advance often means better deals and a bigger choice of vehicles.

Best time to go to Seoul

  • January is the busiest month for flights from St Louis Lambert International Airport to Seoul. To avoid the crowds, plan your trip to Seoul in December.

  • When booking your St Louis Lambert International Airport to Seoul plane ticket, think about what kind of weather works for you. August is the warmest month in Seoul, with temperatures ranging from 19ºC to 32ºC.

  • If you like cooler conditions, search for a cheap ticket from STL to Seoul in January when temperatures average between -12ºC and 4ºC.

More about Seoul

Explore more of South Korea

  • Seoul will leave a lasting impression, but there are so many other corners of South Korea waiting to be explored. About 322 kilometres southeast of Seoul, a trip to Busan will keep you on the go. Start with attractions like Gamcheon Culture Village, Haeundae Beach and Beautiful View Busan - Diamond Bridge.

  • Around 241 kilometres southeast of Seoul, Daegu is another essential stop in South Korea. No visit is complete without checking out Alive Aquarium Daegu, Nature Park and Seonsa Historical Park.

More travel options

Plan the rest of your trip from St Louis to Seoul

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.