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Cheap flights from St. Louis to Seoul from $710

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Seoul departing on 9/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from St. Louis to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Japan Airlines Logo
6:00 am - 9:15 pmSTL  Lambert-St Louis-GMP Seoul Gimpo Intl
25h 15m2 stops Los Angeles Tokyo Haneda
Japan Airlines Logo
8:00 am - 4:48 pmGMP  Seoul Gimpo Intl-STL Lambert-St Louis
22h 48m2 stops Tokyo Haneda Chicago O'Hare Intl
$1,384Japan Airlines
Tue, Sep 1 - Sat, Sep 12
Multiple Airlines Logo
6:00 am - 9:15 pmSTL  Lambert-St Louis-GMP Seoul Gimpo Intl
25h 15m2 stops Los Angeles Tokyo Haneda
Multiple Airlines Logo
12:05 pm - 11:30 pmGMP  Seoul Gimpo Intl-STL Lambert-St Louis
25h 25m2 stops Tokyo Haneda Los Angeles
$1,515Multiple Airlines
Sun, Sep 6 - Sun, Sep 13
Japan Airlines Logo
11:01 am - 9:15 pmSTL  Lambert-St Louis-GMP Seoul Gimpo Intl
20h 14m2 stops Chicago O'Hare Intl Tokyo Haneda
Japan Airlines Logo
12:05 pm - 11:30 pmGMP  Seoul Gimpo Intl-STL Lambert-St Louis
25h 25m2 stops Tokyo Haneda Los Angeles
$1,650Japan Airlines
Thu, Sep 10 - Tue, Sep 15
Japan Airlines Logo
6:00 am - 9:15 pmSTL  Lambert-St Louis-GMP Seoul Gimpo Intl
25h 15m2 stops Los Angeles Tokyo Haneda
Japan Airlines Logo
7:15 pm - 11:30 pmGMP  Seoul Gimpo Intl-STL Lambert-St Louis
42h 15m2 stops Tokyo Haneda Los Angeles
$1,670Japan Airlines
Thu, Sep 10 - Mon, Sep 14
Japan Airlines Logo
6:32 am - 9:15 pmSTL  Lambert-St Louis-GMP Seoul Gimpo Intl
24h 43m2 stops Dallas/Fort Worth Tokyo Haneda
Japan Airlines Logo
12:05 pm - 11:46 pmGMP  Seoul Gimpo Intl-STL Lambert-St Louis
25h 41m2 stops Tokyo Haneda Los Angeles
$1,886Japan Airlines
Wed, Oct 21 - Sun, Oct 25
Japan Airlines Logo
7:29 am - 10:55 amSTL  Lambert-St Louis-GMP Seoul Gimpo Intl
36h 26m2 stops Chicago O'Hare Intl Tokyo Haneda
Japan Airlines Logo
8:00 am - 10:56 amGMP  Seoul Gimpo Intl-STL Lambert-St Louis
17h 56m2 stops Tokyo Haneda Dallas/Fort Worth
$2,053Japan Airlines
Tue, Dec 15 - Sat, Dec 19
Japan Airlines Logo
6:04 am - 9:15 pmSTL  Lambert-St Louis-GMP Seoul Gimpo Intl
25h 11m2 stops Los Angeles Tokyo Haneda
Japan Airlines Logo
8:00 am - 11:45 pmGMP  Seoul Gimpo Intl-STL Lambert-St Louis
30h 45m2 stops Tokyo Haneda Los Angeles
$2,142Japan Airlines
Wed, Oct 21 - Tue, Nov 17
Japan Airlines Logo
6:04 am - 9:15 pmSTL  Lambert-St Louis-GMP Seoul Gimpo Intl
25h 11m2 stops Los Angeles Tokyo Haneda
Japan Airlines Logo
12:05 pm - 11:45 pmGMP  Seoul Gimpo Intl-STL Lambert-St Louis
26h 40m2 stops Tokyo Haneda Los Angeles
$2,171Japan Airlines
Wed, Oct 21 - Tue, Nov 17
Japan Airlines Logo
1:06 pm - 10:55 amSTL  Lambert-St Louis-GMP Seoul Gimpo Intl
30h 49m2 stops Chicago O'Hare Intl Tokyo Haneda
Japan Airlines Logo
12:05 pm - 11:59 pmGMP  Seoul Gimpo Intl-STL Lambert-St Louis
26h 54m2 stops Tokyo Haneda Los Angeles
$2,174Japan Airlines
Sun, Jan 3 - Fri, Jan 8
Japan Airlines Logo
6:04 am - 9:15 pmSTL  Lambert-St Louis-GMP Seoul Gimpo Intl
25h 11m2 stops Los Angeles Tokyo Haneda
Japan Airlines Logo
12:05 pm - 11:45 pmGMP  Seoul Gimpo Intl-STL Lambert-St Louis
26h 40m2 stops Tokyo Haneda Los Angeles
$2,299Japan Airlines
Wed, Oct 21 - Tue, Nov 17

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Japan Airlines flights from St. Louis to Seoul Gimpo Intl Airport

Our best Japan Airlines deals on St. Louis to Seoul Gimpo Intl Airport flight tickets
Japan Airlines
Sep 1
STL6:00 amLambert-St Louis
25h 15m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Sep 12
GMP8:00 amSeoul Gimpo Intl
22h 48m
2 stops
STL4:48 pmLambert-St Louis
$1,384
Japan Airlines
Sep 10
STL11:01 amLambert-St Louis
20h 14m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Sep 15
GMP12:05 pmSeoul Gimpo Intl
25h 25m
2 stops
STL11:30 pmLambert-St Louis
$1,650
Japan Airlines
Sep 10
STL6:00 amLambert-St Louis
25h 15m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Sep 14
GMP7:15 pmSeoul Gimpo Intl
42h 15m
2 stops
STL11:30 pmLambert-St Louis
$1,670

ANA flights from St. Louis to Seoul Gimpo Intl Airport

Our best ANA deals on St. Louis to Seoul Gimpo Intl Airport flight tickets
ANA
Aug 14
STL6:15 amLambert-St Louis
26h 05m
2 stops
GMP10:20 pmSeoul Gimpo Intl
Aug 22
GMP7:40 amSeoul Gimpo Intl
25h 36m
2 stops
STL7:16 pmLambert-St Louis
$3,131
ANA
Oct 21
STL3:11 pmLambert-St Louis
29h 54m
2 stops
GMP11:05 amSeoul Gimpo Intl
Nov 11
GMP7:50 pmSeoul Gimpo Intl
29h 42m
2 stops
STL10:32 amLambert-St Louis
$9,630
ANA
Sep 9
STL8:30 amLambert-St Louis
23h 50m
2 stops
GMP10:20 pmSeoul Gimpo Intl
Sep 15
GMP12:40 pmSeoul Gimpo Intl
20h 36m
2 stops
STL7:16 pmLambert-St Louis
$10,738

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Seoul Gimpo Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 11, 2026.
Use the filters below to find and compare flights from St. Louis to Seoul Gimpo Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSeoul

STL Lambert-St Louis - GMP Seoul Gimpo Intl

STLGMP

Lambert-St Louis

Tue 9/1

6:00 am-9:15 pm

2 stops25h 15m

Seoul Gimpo Intl

Sat 9/12

8:00 am-4:48 pm

2 stops22h 48m

$1,384

St. LouisSeoul

STL Lambert-St Louis - GMP Seoul Gimpo Intl

STLGMP

Lambert-St Louis

Sun 9/6

6:00 am-9:15 pm

2 stops25h 15m

Seoul Gimpo Intl

Sun 9/13

12:05 pm-11:30 pm

2 stops25h 25m

$1,515
Quickest round-trip

St. LouisSeoul

STL Lambert-St Louis - GMP Seoul Gimpo Intl

STLGMP

Lambert-St Louis

Thu 9/10

11:01 am-9:15 pm

2 stops20h 14m

Seoul Gimpo Intl

Tue 9/15

12:05 pm-11:30 pm

2 stops25h 25m

$1,650

St. LouisSeoul

STL Lambert-St Louis - GMP Seoul Gimpo Intl

STLGMP

Lambert-St Louis

Thu 9/10

6:00 am-9:15 pm

2 stops25h 15m

Seoul Gimpo Intl

Mon 9/14

7:15 pm-11:30 pm

2 stops42h 15m

$1,670

St. LouisSeoul

STL Lambert-St Louis - GMP Seoul Gimpo Intl

STLGMP

Lambert-St Louis

Wed 10/21

6:32 am-9:15 pm

2 stops24h 43m

Seoul Gimpo Intl

Sun 10/25

12:05 pm-11:46 pm

2 stops25h 41m

$1,886

St. LouisSeoul

STL Lambert-St Louis - GMP Seoul Gimpo Intl

STLGMP

Lambert-St Louis

Tue 12/15

7:29 am-10:55 am

2 stops36h 26m

Seoul Gimpo Intl

Sat 12/19

8:00 am-10:56 am

2 stops17h 56m

$2,053

St. LouisSeoul

STL Lambert-St Louis - GMP Seoul Gimpo Intl

STLGMP

Lambert-St Louis

Wed 10/21

6:04 am-9:15 pm

2 stops25h 11m

Seoul Gimpo Intl

Tue 11/17

8:00 am-11:45 pm

2 stops30h 45m

$2,142

St. LouisSeoul

STL Lambert-St Louis - GMP Seoul Gimpo Intl

STLGMP

Lambert-St Louis

Wed 10/21

6:04 am-9:15 pm

2 stops25h 11m

Seoul Gimpo Intl

Tue 11/17

12:05 pm-11:45 pm

2 stops26h 40m

$2,171

St. LouisSeoul

STL Lambert-St Louis - GMP Seoul Gimpo Intl

STLGMP

Lambert-St Louis

Sun 1/3

1:06 pm-10:55 am

2 stops30h 49m

Seoul Gimpo Intl

Fri 1/8

12:05 pm-11:59 pm

2 stops26h 54m

$2,174

St. LouisSeoul

STL Lambert-St Louis - GMP Seoul Gimpo Intl

STLGMP

Lambert-St Louis

Wed 10/21

6:04 am-9:15 pm

2 stops25h 11m

Seoul Gimpo Intl

Tue 11/17

12:05 pm-11:45 pm

2 stops26h 40m

$2,299

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seoul from

How to get the cheapest flight ticket from St. Louis to Seoul Gimpo Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Lambert-St Louis to Seoul Gimpo Intl?

Japan Airlines is the most popular carrier operating from Lambert-St Louis to Seoul Gimpo Intl

When to book flights from St. Louis to Seoul Gimpo Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Seoul Gimpo Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Seoul Gimpo Intl Airport (STL to GMP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Seoul Gimpo Intl Airport

Fastest flight time

24h 43m

Direct flights

None
The fastest flight from St. Louis to Seoul Gimpo Intl Airport takes 24h 43m
There are no direct flights from St. Louis to Seoul Gimpo Intl Airport. There are no popular flight routes from St. Louis to Seoul Gimpo Intl Airport.
Search flight deals

Frequently asked questions about flying from St. Louis to Seoul Gimpo Intl Airport

  • How far is Lambert-St Louis to Seoul Gimpo Intl by plane?

    There are 6665.9 mi between Lambert-St Louis and Seoul Gimpo Intl. In terms of flight time, this usually takes a little over 24h 43m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Seoul Gimpo Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Seoul Gimpo Intl Airport refresh daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Seoul Gimpo Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Seoul Gimpo Intl Airport.

  • What documentation or ID do you need to fly to Seoul Gimpo Intl Airport?

    The travel and health documents you'll need for your trip to Seoul Gimpo Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seoul Gimpo Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Seoul?

It is quick and easy to find St. Louis to Seoul flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seoul that suits you.

Can I find flights from St. Louis to Seoul with flexible booking policies on momondo?

All flight searches from St. Louis to Seoul on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Seoul?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seoul from St. Louis.

I’m not ready to book a flight from St. Louis to Seoul right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Seoul from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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