STL - ICN

$503 Find Cheap Flights from St. Louis to Incheon - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$1,014
Typical prices: $982-$1,444
Multiple Airlines
Sun 11/25Sun 12/2
STL - ICN • 2 stops
Cheapest one-way
$503
Typical prices: $534-$935
Multiple Airlines
Mon 12/3
STL - ICN • 3 stops
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Incheon Intl Airport. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
25 weeks
in advance
Our data shows that travelers who book at least 25 weeks in advance save around 29% compared to booking last minute.
Insights
Insights
When to travel
December
Cheapest • 30% price drop
May
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Detroit Metropolitan Wayne County (DTW)
Cheapest • Avg $846 (round-trip)
Chicago O'Hare Intl (ORD)
Shortest trip • 17h 17m (one-way)
Insights
Insights
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We hope you love your trip to Incheon Intl Airport!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Incheon (STL-ICN)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Incheon

Wed, Nov 25 - Wed, Dec 2
Multiple Airlines Logo
3:04 pm - 4:20 pmSTL  Lambert-St Louis-ICN Incheon Intl
34h 16m2 stops Denver Intl Los Angeles
Multiple Airlines Logo
10:20 pm - 1:07 pmICN  Incheon Intl-STL Lambert-St Louis
29h 47m2 stops Los Angeles Las Vegas Harry Reid Intl
$1,014Multiple Airlines
Wed, Feb 3 - Thu, Feb 11
Korean Air Logo
6:00 am - 6:20 pmSTL  Lambert-St Louis-ICN Incheon Intl
21h 20m1 stop Atlanta Hartsfield-Jackson
Korean Air Logo
10:35 am - 6:01 pmICN  Incheon Intl-STL Lambert-St Louis
22h 26m1 stop Atlanta Hartsfield-Jackson
$1,067Korean Air
Wed, Mar 24 - Thu, Apr 1
Multiple Airlines Logo
10:25 am - 12:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
36h 20m2 stops Chicago O'Hare Intl Hong Kong Intl
Multiple Airlines Logo
8:00 am - 10:23 pmICN  Incheon Intl-STL Lambert-St Louis
28h 23m2 stops Hong Kong Intl Chicago O'Hare Intl
$1,092Multiple Airlines
Wed, Apr 7 - Tue, Apr 20
Delta Logo
7:05 pm - 2:10 pmSTL  Lambert-St Louis-ICN Incheon Intl
29h 05m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:20 pm - 12:36 amICN  Incheon Intl-STL Lambert-St Louis
19h 16m1 stop Salt Lake City
$1,096Delta
Thu, Apr 8 - Tue, Apr 20
Delta Logo
3:40 pm - 4:00 amSTL  Lambert-St Louis-ICN Incheon Intl
22h 20m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:50 pm - 8:12 amICN  Incheon Intl-STL Lambert-St Louis
27h 22m1 stop Atlanta Hartsfield-Jackson
$1,096Delta
Tue, Dec 8 - Mon, Dec 21
United Airlines Logo
6:00 am - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
19h 25m1 stop Newark
United Airlines Logo
6:30 pm - 10:59 pmICN  Incheon Intl-STL Lambert-St Louis
19h 29m1 stop Newark
$1,097United Airlines
Wed, Dec 9 - Mon, Dec 21
United Airlines Logo
6:09 am - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
19h 16m1 stop Newark
United Airlines Logo
6:00 pm - 5:06 amICN  Incheon Intl-STL Lambert-St Louis
26h 06m1 stop San Francisco
$1,097United Airlines
Mon, Dec 7 - Mon, Dec 21
American Airlines Logo
5:50 am - 4:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
19h 55m1 stop Dallas/Fort Worth
American Airlines Logo
6:50 pm - 12:16 amICN  Incheon Intl-STL Lambert-St Louis
20h 26m1 stop Dallas/Fort Worth
$1,097American Airlines
Wed, Dec 9 - Wed, Dec 23
American Airlines Logo
5:50 am - 4:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
19h 55m1 stop Dallas/Fort Worth
American Airlines Logo
6:50 pm - 12:16 amICN  Incheon Intl-STL Lambert-St Louis
20h 26m1 stop Dallas/Fort Worth
$1,097American Airlines
Mon, Apr 12 - Sat, Apr 24
Korean Air Logo
6:00 am - 3:55 pmSTL  Lambert-St Louis-ICN Incheon Intl
19h 55m1 stop Atlanta Hartsfield-Jackson
Korean Air Logo
8:45 am - 3:58 pmICN  Incheon Intl-STL Lambert-St Louis
21h 13m1 stop Atlanta Hartsfield-Jackson
$1,100Korean Air
Booking Insights

Price, demand and travel trends for St. Louis to Incheon Intl Airport flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What's the cheapest day of the week to fly from St. Louis to Incheon Intl Airport?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from St. Louis to Incheon Intl Airport. It’s 25% cheaper than the average day, while Saturday is the most expensive, with prices 14% higher.

What’s the cheapest month to fly from St. Louis to Incheon Intl Airport?

•December is the cheapest month to fly from St. Louis to Incheon Intl Airport at $846 round-trip.
•July ($1,510) and November ($1,469) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 78% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from St. Louis to Incheon Intl Airport the cheapest?

Flights from St. Louis to Incheon Intl Airport are cheapest 25 weeks before departure. Booking in this window typically costs about 29% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for St. Louis to Incheon Intl Airport flights

Low season

December

Cheapest flight

$503
Beat the crowds with an average 47% drop in travelers.
The most popular month to fly with an average 88% increase in travelers.
One-way flight from St. Louis to Incheon Intl Airport

When to book flights from St. Louis to Incheon

Are your dates flexible? Find out the best times to travel from St. Louis to Incheon based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your St. Louis to Incheon Intl Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from St. Louis to Incheon Intl Airport?

    Four cabin classes are available on flights from St. Louis to Incheon Intl Airport:

    • Economy Class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • How long is a flight from St. Louis to Incheon Intl Airport?

    A nonstop flight from St. Louis to Incheon Intl Airport takes 00m, covering 6,670 miles.

  • Do I need a passport to fly from St. Louis to Incheon Intl Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a St. Louis to Incheon Intl Airport flight?

    Round-trip flights from St. Louis to Incheon Intl Airport range from $982 to $1,444, with an average of $1,206 over the past 12 months. Anything below $982 counts as a good deal.

  • How expensive are last-minute St. Louis to Incheon Intl Airport flights?

    Last-minute fares on this route (booked within two weeks of departure) run 7% above the $1,206 route average. Book 25 weeks before departure for the lowest fares.

  • Have flight prices from St. Louis to Incheon Intl Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,014 to $7,368. That means the highest observed fare was about 7x higher than the lowest one.

  • How are flight prices from St. Louis to Incheon Intl Airport looking right now?

    One-way fares from St. Louis to Incheon Intl Airport are currently in line with typical prices for this route. Average one-way fares are about $652.

  • What car rental options are available at Incheon Intl Airport (ICN)?

    Incheon Intl Airport (ICN) hosts 5 major car rental companies, with daily rates averaging $47 for economy cars. Top options include:

    • WECAR
    • Wheego
    • Yesaway
    • Alamo
    • Enterprise Rent-A-Car

  • Which airports can I use when flying from St. Louis to Incheon Intl Airport?

    Flights from St. Louis to Incheon Intl Airport usually depart from Lambert-St Louis (STL) and arrive at Incheon Intl (ICN).

  • Which airports do connecting flights from St. Louis to Incheon Intl Airport pass through?

    One-stop flights from St. Louis to Incheon Intl Airport most commonly connect through:

    • Seattle/Tacoma Intl (SEA) - 42% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 17% of one-stop connections
    • Dallas/Fort Worth (DFW) - 14% of one-stop connections
    • Minneapolis St Paul (MSP) - 13% of one-stop connections

  • Can I save money by using flexible dates for flights from St. Louis to Incheon Intl Airport?

    Yes. Flexible dates can save you up to 34% on flights from St. Louis to Incheon Intl Airport. Wednesday is the cheapest departure day at $916 round-trip on average, while Saturday is the most expensive at $1,379, a difference of $463.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from St. Louis to Incheon Intl Airport?

    Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time at 17h 17m, compared with 17h 56m via Minneapolis St Paul (MSP) and 18h 45m via Atlanta Hartsfield-Jackson (ATL).

  • What is the time difference between St. Louis and Incheon Intl Airport?

    Incheon Intl Airport is 14 hours ahead of St. Louis (Korean Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Incheon Intl Airport?

    Some of the most popular sights in Incheon Intl Airport are Songdo Convensia and Songdo Central Park. These are among the most viewed places in Incheon Intl Airport on KAYAK.

Your guide to booking St. Louis to Incheon Intl Airport flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Saturday. On this route, Wednesday flights average $916, about $463 less than Saturday fares (34% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 25 weeks before you fly. On this route, that window historically saves about 29% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your St. Louis to Incheon Intl Airport trip for December. Fares historically average $846 round-trip in that month - typically $664 less than the most expensive month, which is July (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Incheon Intl Airport.

    • Grand Hyatt Incheon
    • Hotel Ora Incheon
    • Hotel Hu Incheon Airport

More options for your flight from St. Louis to Incheon

Complete your trip to Incheon with a hotel stay or car rental

Car rentals in Seoul
Hotels in Seoul