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Flights from Seoul to St. Louis

Flight Info | Seoul to St. Louis

The distance between Seoul and St. Louis is approximately 10,736.12 km. Based on Trip.com's data, travel demand peaks in July. The cheapest month to book is October.

Cheapest one-way
$547
Asiana Airlines Asiana Airlines SEL-STL 36h 50m · 1 stop Sat, Oct 17
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Cheapest round-trip
$984
American Airlines American Airlines SEL-STL 29h 34m · 2 stops Sat, Sep 5 - Wed, Sep 9
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Recommended airlines
Asiana Airlines Asiana Airlines Cheapest · From $547 American Airlines American Airlines Most booked
When to travel
October
Cheapest
July
Peak season for travel
Route details
10,736.12 km
Flight distance

Find flight deals from Seoul to St. Louis for the next 3 months. Book one way flights from $547 or round trip flights from $984.

      • ICN 5:50 PM
        29h 34m
        1 stop
        STL 9:24 AM
        Seoul - St. Louis | Sat, Sep 5 | American Airlines
        STL 8:36 AM
        17h 9m
        1 stop
        ICN 3:45 PM
        St. Louis - Seoul | Wed, Sep 9 | American Airlines
        $984 $1,363
        28% off
        28% off
        $1,363 $984
      • ICN 5:50 PM
        19h 53m
        1 stop
        STL 11:43 PM
        Seoul - St. Louis | Thu, Sep 17 | American Airlines
        STL 5:43 AM
        20h 2m
        1 stop
        ICN 3:45 PM
        St. Louis - Seoul | Thu, Sep 24 | American Airlines
        $1,034 $1,363
        24% off
        24% off
        $1,363 $1,034
      • ICN 5:50 PM
        19h 52m
        1 stop
        STL 11:42 PM
        Seoul - St. Louis | Wed, Sep 9 | American Airlines
        STL 7:00 AM
        18h 45m
        1 stop
        ICN 3:45 PM
        St. Louis - Seoul | Wed, Sep 16 | American Airlines
        $1,039 $1,363
        24% off
        24% off
        $1,363 $1,039
      • ICN 5:50 PM
        19h 53m
        1 stop
        STL 11:43 PM
        Seoul - St. Louis | Sat, Oct 3 | American Airlines
        STL 5:40 AM
        20h 5m
        1 stop
        ICN 3:45 PM
        St. Louis - Seoul | Tue, Oct 6 | American Airlines
        $1,047
        23% off
        $1,363 $1,047
      • ICN 4:50 PM
        36h 48m
        1 stop
        STL 3:38 PM
        Seoul - St. Louis | Wed, Aug 26 | United Airlines
        STL 8:42 AM
        29h 38m
        1 stop
        ICN 4:20 AM
        St. Louis - Seoul | Sat, Aug 29 | United Airlines
        $1,054
        23% off
        $1,363 $1,054
      • ICN 5:15 PM
        36h 45m
        1 stop
        STL 4:00 PM
        Seoul - St. Louis | Sat, Oct 3 | United Airlines
        STL 7:30 AM
        41h 50m
        1 stop
        ICN 3:20 PM
        St. Louis - Seoul | Tue, Oct 6 | United Airlines
        $1,076
        21% off
        $1,363 $1,076
      • ICN 5:50 PM
        19h 52m
        1 stop
        STL 11:42 PM
        Seoul - St. Louis | Sun, Aug 30 | American Airlines
        STL 8:36 AM
        17h 9m
        1 stop
        ICN 3:45 PM
        St. Louis - Seoul | Wed, Sep 2 | American Airlines
        $1,086
        20% off
        $1,363 $1,086
      • ICN 5:15 PM
        36h 51m
        1 stop
        STL 4:06 PM
        Seoul - St. Louis | Thu, Sep 17 | United Airlines
        STL 8:35 AM
        29h 45m
        1 stop
        ICN 4:20 AM
        St. Louis - Seoul | Thu, Sep 24 | United Airlines
        $1,089
        20% off
        $1,363 $1,089
      • ICN 4:50 PM
        36h 48m
        1 stop
        STL 3:38 PM
        Seoul - St. Louis | Wed, Sep 9 | United Airlines
        STL 4:53 PM
        32h 27m
        1 stop
        ICN 3:20 PM
        St. Louis - Seoul | Wed, Sep 16 | United Airlines
        $1,098
        19% off
        $1,363 $1,098
      • ICN 7:40 PM
        35h 7m
        1 stop
        STL 4:47 PM
        Seoul - St. Louis | Thu, Sep 24 | Delta Air Lines
        STL 8:00 AM
        17h 20m
        1 stop
        ICN 3:20 PM
        St. Louis - Seoul | Mon, Sep 28 | Delta Air Lines
        $1,131
        17% off
        $1,363 $1,131
      • SEL 1:00 PM
        17h 25m
        1 stop
        STL 2:00 PM
        Seoul - St. Louis | Thu, Aug 20 | Normal Airline
        STL 3:00 PM
        6h
        Nonstop
        SEL 4:00 PM
        St. Louis - Seoul | Sat, Aug 22 | Normal Airline
        Find more flights
        Find more flights
      • ICN 12:40 PM
        36h 50m
        1 stop
        STL 11:30 AM
        Seoul - St. Louis | Sat, Oct 17 | Asiana Airlines
        $547 $725
        25% off
        25% off
        $725 $547
      • ICN 9:20 PM
        16h 39m
        1 stop
        STL 11:59 PM
        Seoul - St. Louis | Tue, Oct 13 | Asiana Airlines
        $548 $725
        24% off
        24% off
        $725 $548
      • ICN 9:20 PM
        16h 39m
        1 stop
        STL 11:59 PM
        Seoul - St. Louis | Wed, Oct 7 | Asiana Airlines
        $551 $725
        24% off
        24% off
        $725 $551
      • ICN 9:20 PM
        16h 39m
        1 stop
        STL 11:59 PM
        Seoul - St. Louis | Fri, Oct 9 | Asiana Airlines
        $551
        24% off
        $725 $551
      • ICN 9:20 PM
        16h 39m
        1 stop
        STL 11:59 PM
        Seoul - St. Louis | Fri, Oct 2 | Asiana Airlines
        $559
        23% off
        $725 $559
      • ICN 8:30 AM
        41h 13m
        1 stop
        STL 11:43 AM
        Seoul - St. Louis | Sat, Oct 3 | Asiana Airlines
        $571
        21% off
        $725 $571
      • ICN 9:25 PM
        26h 30m
        1 stop
        STL 9:55 AM
        Seoul - St. Louis | Sat, Oct 17 | Air Premia
        $586
        19% off
        $725 $586
      • ICN 9:25 PM
        26h 30m
        1 stop
        STL 9:55 AM
        Seoul - St. Louis | Sat, Oct 10 | Air Premia
        $588
        19% off
        $725 $588
      • ICN 9:25 PM
        24h 20m
        1 stop
        STL 7:45 AM
        Seoul - St. Louis | Mon, Oct 12 | Air Premia
        $597
        18% off
        $725 $597
      • ICN 8:30 AM
        37h 59m
        1 stop
        STL 8:29 AM
        Seoul - St. Louis | Thu, Oct 8 | Asiana Airlines
        $601
        17% off
        $725 $601
      • SEL 1:00 PM
        17h 25m
        1 stop
        STL 2:00 PM
        Seoul - St. Louis | Thu, Aug 20 | Normal Airline
        Find more flights
        Find more flights

Popular airlines from Seoul to St. Louis

You can choose from 5 airlines that fly from Seoul to St. Louis, including American Airlines, Korean Air, and Asiana Airlines. Asiana Airlines has lowest fares on this route.
American Airlines logo American Airlines
Korean Air logo Korean Air
Asiana Airlines logo Asiana Airlines
Delta Air Lines logo Delta Air Lines
Air Premia logo Air Premia
Airlines are determined based on actual purchased flight tickets from Seoul to St. Louis according to previous 12 months data from Trip.com.

Trip.com price insights on flights from Seoul to St. Louis

What is the cheapest month for round-trip flights from Seoul to St. Louis?

Average price of round-trip flights from Seoul to St. Louis purchased by Trip.com users by month over the past 12 months

According to historical data from Trip.com, the lowest prices for flights from Seoul to St. Louis are found during February, with an average price of $907. Conversely, the highest prices are found during January, with an average price of up to $1,901.

$1,901
$1,404
$907
$410
    Cheapest
  • $1,367
    Aug
  • $1,118
    Sep
  • $1,583
    Oct
  • $1,003
    Nov
  • $975
    Dec
  • $1,901
    Jan
  • $907
    Feb
  • $1,130
    Mar
  • $992
    Apr
  • $1,122
    May
  • $1,671
    Jun
  • $1,685
    Jul

When is the cheapest day to fly from Seoul to St. Louis during Labor Day?

Data is based on the lowest one-way price from Seoul to St. Louis during Labor Day on Trip.com in the past 3 days.

Labor Day is scheduled for Sep 7. The cheapest flights from Seoul to St. Louis are available on Sep 4, with fares starting at $663.

$698
$681
$663
$646
  • $663
    4
    Sep
  • $663
    5
  • $663
    6
  • $698
    7
  • $698
    8
  • $698
    9

Frequently Asked Questions

  • What are the cheapest flights from Seoul to St. Louis (SEL-STL)?

    Based on Trip.com data, Asiana Airlines offers one-way fares as low as $547 on Cheapest nonstop routes (e.g. ICN to STL on Sat, Oct 17), while American Airlines offers Cheapest nonstop round-trips from $984 departing on Sat, Sep 5 and returning on Wed, Sep 9.
  • At the moment, you can catch a nonstop flight from Seoul to St. Louis with the following airlines, including: Asiana Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seoul to St. Louis is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Seoul to St. Louis, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Oct 17, with one-way flights priced at just $547.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Asiana Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for St. Louis travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Seoul to St. Louis is October, when demand for travel is lower.
  • After crunching the numbers on our August flight calendar, it's currently cheapest to fly from Seoul to St. Louis on August 27, 2026 with United Airlines, with prices starting at $1,103.
  • You can land at any one of the following hubs in St. Louis, with Incheon International Airport to St. Louis Lambert International Airport (ICN-STL) is by far the most common option on this route: St. Louis Lambert International Airport (STL) St. Louis Downtown Airport (CPS).
  • The time difference between St. Louis and Seoul is 15h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.
  • Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Seoul to St. Louis is $1,206. Fares vary by travel date, airline and availability.
  • Enter Seoul and St. Louis, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

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Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.