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Cheap flights from St. Louis to Seoul from $728

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 4/10. 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

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Find the cheapest flights from St. Louis to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:55 am - 10:20 pm
STL
-
GMP
23h 25m
2 stops
Multiple Airlines Logo
8:10 am - 8:00 pm
GMP
-
STL
25h 50m
2 stops
$1,113Multiple Airlines
Wed, Sep 2 - Sun, Sep 13
Multiple Airlines Logo
8:55 am - 10:25 pm
STL
-
GMP
23h 30m
2 stops
Multiple Airlines Logo
5:40 pm - 2:00 pm
GMP
-
STL
58h 20m
2 stops
$1,191Multiple Airlines
Sat, Sep 5 - Sat, Sep 19
Japan Airlines Logo
8:00 am - 9:15 pm
STL
-
GMP
23h 15m
2 stops
Japan Airlines Logo
8:00 am - 2:03 pm
GMP
-
STL
20h 03m
2 stops
$1,221Japan Airlines
Mon, Apr 6 - Tue, May 12
Japan Airlines Logo
8:35 am - 9:15 pm
STL
-
GMP
22h 40m
2 stops
Japan Airlines Logo
8:00 am - 2:25 pm
GMP
-
STL
20h 25m
2 stops
$1,278Japan Airlines
Wed, Sep 2 - Sun, Sep 13
Japan Airlines Logo
8:54 am - 9:15 pm
STL
-
GMP
22h 21m
2 stops
Japan Airlines Logo
12:05 pm - 11:57 pm
GMP
-
STL
25h 52m
2 stops
$1,318Japan Airlines
Thu, Apr 16 - Thu, Apr 23
Japan Airlines Logo
8:54 am - 9:15 pm
STL
-
GMP
22h 21m
2 stops
Japan Airlines Logo
12:05 pm - 11:57 pm
GMP
-
STL
25h 52m
2 stops
$1,321Japan Airlines
Wed, Apr 15 - Wed, Apr 22
Japan Airlines Logo
8:35 am - 9:15 pm
STL
-
GMP
22h 40m
2 stops
Japan Airlines Logo
12:05 pm - 11:59 pm
GMP
-
STL
26h 54m
2 stops
$1,347Japan Airlines
Sat, Aug 22 - Tue, Dec 22
Japan Airlines Logo
8:54 am - 9:15 pm
STL
-
GMP
22h 21m
2 stops
Japan Airlines Logo
12:05 pm - 11:57 pm
GMP
-
STL
25h 52m
2 stops
$1,384Japan Airlines
Thu, Apr 16 - Wed, Apr 22
Multiple Airlines Logo
8:55 am - 10:25 pm
STL
-
GMP
23h 30m
2 stops
Multiple Airlines Logo
8:00 am - 2:25 pm
GMP
-
STL
20h 25m
2 stops
$1,395Multiple Airlines
Thu, Sep 10 - Thu, Sep 17
Japan Airlines Logo
8:54 am - 9:15 pm
STL
-
GMP
22h 21m
2 stops
Japan Airlines Logo
12:05 pm - 11:57 pm
GMP
-
STL
25h 52m
2 stops
$1,410Japan Airlines
Wed, Apr 15 - Wed, Apr 22

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
Apr 6
STL8:00 amLambert-St Louis
23h 15m
2 stops
GMP9:15 pmSeoul Gimpo Intl
May 12
GMP8:00 amSeoul Gimpo Intl
20h 03m
2 stops
STL2:03 pmLambert-St Louis
$1,221
Japan Airlines
Sep 2
STL8:35 amLambert-St Louis
22h 40m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Sep 13
GMP8:00 amSeoul Gimpo Intl
20h 25m
2 stops
STL2:25 pmLambert-St Louis
$1,278
Japan Airlines
Apr 16
STL8:54 amLambert-St Louis
22h 21m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Apr 23
GMP12:05 pmSeoul Gimpo Intl
25h 52m
2 stops
STL11:57 pmLambert-St Louis
$1,318

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
Mar 23
STL11:25 amLambert-St Louis
21h 05m
2 stops
GMP10:30 pmSeoul Gimpo Intl
Jun 17
GMP7:55 pmSeoul Gimpo Intl
30h 16m
2 stops
STL12:11 pmLambert-St Louis
$6,984
ANA
Mar 22
STL6:00 amLambert-St Louis
26h 30m
2 stops
GMP10:30 pmSeoul Gimpo Intl
Mar 24
GMP7:50 pmSeoul Gimpo Intl
36h 10m
2 stops
STL6:00 pmLambert-St Louis
$9,663
ANA
Mar 24
STL11:25 amLambert-St Louis
21h 05m
2 stops
GMP10:30 pmSeoul Gimpo Intl
Jun 10
GMP12:40 pmSeoul Gimpo Intl
20h 43m
2 stops
STL7:23 pmLambert-St Louis
$10,680

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 March 21, 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 - GMP

STLGMP

Lambert-St Louis

Wed 9/2

8:55 am-10:20 pm

2 stops23h 25m

Seoul Gimpo Intl

Sun 9/13

8:10 am-8:00 pm

2 stops25h 50m

$1,113

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Sat 9/5

8:55 am-10:25 pm

2 stops23h 30m

Seoul Gimpo Intl

Sat 9/19

5:40 pm-2:00 pm

2 stops58h 20m

$1,191

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Mon 4/6

8:00 am-9:15 pm

2 stops23h 15m

Seoul Gimpo Intl

Tue 5/12

8:00 am-2:03 pm

2 stops20h 03m

$1,221
Quickest round-trip

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 9/2

8:35 am-9:15 pm

2 stops22h 40m

Seoul Gimpo Intl

Sun 9/13

8:00 am-2:25 pm

2 stops20h 25m

$1,278

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 4/16

8:54 am-9:15 pm

2 stops22h 21m

Seoul Gimpo Intl

Thu 4/23

12:05 pm-11:57 pm

2 stops25h 52m

$1,318

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 4/15

8:54 am-9:15 pm

2 stops22h 21m

Seoul Gimpo Intl

Wed 4/22

12:05 pm-11:57 pm

2 stops25h 52m

$1,321

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Sat 8/22

8:35 am-9:15 pm

2 stops22h 40m

Seoul Gimpo Intl

Tue 12/22

12:05 pm-11:59 pm

2 stops26h 54m

$1,347

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 4/16

8:54 am-9:15 pm

2 stops22h 21m

Seoul Gimpo Intl

Wed 4/22

12:05 pm-11:57 pm

2 stops25h 52m

$1,384

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 9/10

8:55 am-10:25 pm

2 stops23h 30m

Seoul Gimpo Intl

Thu 9/17

8:00 am-2:25 pm

2 stops20h 25m

$1,395

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 4/15

8:54 am-9:15 pm

2 stops22h 21m

Seoul Gimpo Intl

Wed 4/22

12:05 pm-11:57 pm

2 stops25h 52m

$1,410

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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

21h 05m

Direct flights

None
The fastest flight from St. Louis to Seoul Gimpo Intl Airport takes 21h 05m
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

  • 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 21h 05m.

  • 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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