Are direct flights from St. Louis to Seoul always the best option?

Direct flights offer convenience by minimizing travel time and avoiding layovers, but they are not always the most budget-friendly choice. Flights with one or more connections can often be cheaper. Consider your priorities for cost versus convenience when making your decision.

Can flexible travel dates help on St. Louis to Seoul flights?

Yes, being flexible with your travel dates can significantly impact flight prices. Flying on weekdays or during off-peak seasons often results in lower fares compared to weekends or popular holiday periods. Adjusting your departure or return by a few days may unlock better deals.

What extra costs should I check before booking St. Louis to Seoul flights?

Before booking, always check for potential extra costs such as baggage fees, seat selection charges, and in-flight services. Some airlines may also charge for printing boarding passes at the airport. Factor these into your total travel budget to avoid surprises.

Flights From St. Louis

To Seoul

Cheap Flights from St. Louis to Seoul

Browse current best options from St. Louis. Become a member to unlock all deals and get alerts when new deals appear.

Deals from

St. Louis

RatePunk searches hundreds of travel sites at once for deals on flights to Seoul

Prices updated today

485 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Nov 2, 2026.)

Today’s best flight deals from St. Louis to Seoul

Explore current cheapest deals departing from St. Louis to Seoul

2026-12-04 – 2026-12-13
STL - Seoul
78% AI deal score
$1,046
$920
Round trip
2027-02-02 – 2027-02-15
STL - Seoul
73% AI deal score
$999
$1,088
Round trip
2026-11-03 – 2026-11-18
STL - Seoul
77% AI deal score
$970
$1,106
Round trip
2027-04-14 – 2027-04-21
STL - Seoul
76% AI deal score
$995
$1,109
Round trip
2027-04-20 – 2027-04-27
STL - Seoul
76% AI deal score
$1,003
$1,109
Round trip
2027-04-13 – 2027-04-27
STL - Seoul
76% AI deal score
$1,004
$1,117
Round trip
2026-11-11 – 2026-11-17
STL - Seoul
75% AI deal score
$970
$1,133
Round trip
2026-11-09 – 2026-11-17
STL - Seoul
74% AI deal score
$966
$1,139
Round trip
2026-11-10 – 2026-11-17
STL - Seoul
75% AI deal score
$985
$1,139
Round trip
2026-11-03 – 2026-11-17
STL - Seoul
74% AI deal score
$975
$1,153
Round trip

St. Louis to Seoul: Overview

Insights for flights from St. Louis to Seoul

Fares for flights from St. Louis to Seoul typically range from $1098–$1864, with a median of $1541. Right now, current fares are above the typical level for this route. There are currently no recent fares classified as a good price for this journey.

A typical journey from St. Louis to Seoul takes approximately 32h 37m including connections. Given that most itineraries involve at least one stopover, this duration reflects the overall travel time rather than a direct flight. Travelers should plan for a significant amount of time in transit.

The route from St. Louis to Seoul covers a substantial distance of 10,740 kilometers, classifying it as a long-haul flight. This considerable distance means that itineraries will involve extended travel times and typically include multiple connections.

When considering cheap flights from St. Louis to Seoul, the most affordable times to fly are typically in December, with a median fare of $822. Other cost-effective months include April, where median fares are around $1035, and July, with median fares at $1061. New deals for this route show up several times a week, so setting up a price alert can be beneficial.

For flights from St. Louis to Seoul, most itineraries connect at least once, with 0% of recent fares being non-stop. When connections are involved, the typical number of stopovers is 2. This means you should expect your journey to include multiple segments and layovers.

How much is a round trip from St. Louis to Seoul

Regular price: $843 - $1,533

Prices for flights from St. Louis to Seoul are currently within the regular range.

The regular price range for flights from St. Louis to Seoul is between $843 and $1533. The current lowest deal is $1109 with Alaska Airlines, Inc. for travel from Apr 14-Apr 21.

now $1,109

Low $843

High $1,533

The cheapest time to fly from St. Louis to Seoul

The cheapest month to fly from St. Louis to Seoul is December, with a median price of $818. The most expensive month to fly is February, with a median price of $1879. Prices are generally lower from January to December.

December

Cheapest

Flights from $818

February

Most Expensive

Flights from $1,879

Jan

Feb

Apr

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from St. Louis to Seoul

Korean Air

T'way Air

Alaska Airlines, Inc.

Frontier Airlines

Last-minute flights going from St. Louis to Seoul

Tue, Oct 27

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,354

$1,363

One-way

Thu, Oct 29

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,225

$1,827

One-way

Thu, Oct 29

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,128

$1,830

One-way

Fri, Oct 30

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,225

$1,826

One-way

Fri, Oct 30

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,321

$1,837

One-way

Sun, Nov 1

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,164

$1,952

One-way

Biggest price drops on these dates for flights from St. Louis to Seoul

4 nights

Dec 4 - Dec 8

$1,142 → $962

16%

3 nights

Dec 4 - Dec 7

$1,143 → $976

15%

5 nights

Dec 2 - Dec 7

$1,116 → $970

13%

5 nights

Dec 4 - Dec 9

$1,119 → $977

13%

Popular Airports to fly from St. Louis to Seoul

St. Louis - Seoul route insights

💸 Price insights

Recent fares are above the typical level.

Recent fares for St. Louis to Seoul are above the typical level, with a median of $1541.

📅 Best time to fly

December is historically the cheapest month to fly.

Historically, December is the cheapest month to fly from St. Louis to Seoul, with a median price of $822.

⏱️ Flight duration

Connecting flights typically take 32h 37m.

Flights from St. Louis to Seoul typically involve connecting flights, with a median duration of 32h 37m.

✈️ Airlines & availability

Connecting flights are dominant for this route.

Connecting flights are dominant for this route, with a median of 2 stopovers.

🏆 Airline highlight

Alaska Airlines, Inc. offers a recent deal for $1109.

A recent deal from Alaska Airlines, Inc. for $1109 is available from April 14-April 21.

🎯 Booking tip

Deals appear regularly for this route.

Historically, deals for flights from St. Louis to Seoul appear regularly within a 30-day window.

St. Louis main airports to depart from

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is a good option for flights from St. Louis to Seoul.

📍 ~20 km from St. Louis (reachable by car or public transport)

💸 Flights from ~$981

Seoul main airports to arrive at

Incheon International (ICN)

Cheapest

Incheon International Airport is a good option for flights from St. Louis to Seoul.

📍 ~48 km from Seoul (reachable by car)

💸 Flights from ~$1,072

Airports nearby Seoul used as alternative

Cheongju International (CJJ)

Cheongju International is a useful alternative, being the closest international airport to Seoul outside the capital region.

📍 ~110 km from Seoul (reachable by bus and rail)

💸 Flights from ~$1,258

Business & First Class Flight Deals to Seoul

Discover luxury on the budget with premium cabin class on flights from St. Louis to Seoul.

Elite

Best Elite deals to Seoul

Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.

From STL

Elite

Nov 13

Seoul, South Korea

82% AI deal score

$6,081

$5,134

Save $947

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Nov 22

Seoul, South Korea

82% AI deal score

$6,066

$5,172

Save $894

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Dec 10

Seoul, South Korea

82% AI deal score

$6,278

$5,233

Save $1,045

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Dec 20

Seoul, South Korea

82% AI deal score

$25,919

$22,637

Save $3,282

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Dec 10

Seoul, South Korea

81% AI deal score

$5,782

$5,037

Save $745

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Dec 10

Seoul, South Korea

81% AI deal score

$5,943

$5,107

Save $836

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Nov 10

Seoul, South Korea

81% AI deal score

$5,934

$5,169

Save $765

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Nov 21

Seoul, South Korea

81% AI deal score

$5,977

$5,172

Save $805

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Nov 13

Seoul, South Korea

81% AI deal score

$5,866

$5,191

Save $675

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Nov 13

Seoul, South Korea

81% AI deal score

$5,919

$5,191

Save $728

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Dec 10

Seoul, South Korea

81% AI deal score

$5,977

$5,233

Save $744

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Dec 03

Seoul, South Korea

81% AI deal score

$6,280

$5,426

Save $854

Alaska Airlines, Inc., +1

Business Class

Frequently Asked Questions About Flights to Seoul

To find more affordable flights, consider being flexible with your travel dates and times. Comparing prices across various airlines and booking platforms can also help uncover better deals. Setting up price alerts may notify you when fares drop for your desired route.

Booking flights well in advance, often several months before your intended departure, may lead to better prices. However, last-minute deals can sometimes appear, so it's beneficial to monitor fare trends. Prices can fluctuate based on demand and seasonality.

Comparing nearby airports at both your origin and destination can sometimes reveal more economical flight options. While it may add to your ground travel, the savings on airfare could be significant. Always factor in the additional time and cost of transportation to and from these alternative airports.

St. Louis to Seoul: Overview

Insights for flights from St. Louis to Seoul

How much is a round trip from St. Louis to Seoul

Regular price: $843 - $1,533

Prices for flights from St. Louis to Seoul are currently within the regular range.

The regular price range for flights from St. Louis to Seoul is between $843 and $1533. The current lowest deal is $1109 with Alaska Airlines, Inc. for travel from Apr 14-Apr 21.

now $1,109

Low $843

High $1,533

The cheapest time to fly from St. Louis to Seoul

December

Cheapest

Flights from $818

February

Most Expensive

Flights from $1,879

Jan

Feb

Apr

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from St. Louis to Seoul

Korean Air

T'way Air

Alaska Airlines, Inc.

Frontier Airlines

Last-minute flights going from St. Louis to Seoul

Tue, Oct 27

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,354

$1,363

One-way

Thu, Oct 29

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,225

$1,827

One-way

Thu, Oct 29

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,128

$1,830

One-way

Fri, Oct 30

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,225

$1,826

One-way

Fri, Oct 30

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,321

$1,837

One-way

Sun, Nov 1

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Korean Air

$1,164

$1,952

One-way

Biggest price drops on these dates for flights from St. Louis to Seoul

4 nights

Dec 4 - Dec 8

$1,142 → $962

16%

3 nights

Dec 4 - Dec 7

$1,143 → $976

15%

5 nights

Dec 2 - Dec 7

$1,116 → $970

13%

5 nights

Dec 4 - Dec 9

$1,119 → $977

13%

Popular Airports to fly from St. Louis to Seoul

St. Louis - Seoul route insights

💸 Price insights

Recent fares are above the typical level.

Recent fares for St. Louis to Seoul are above the typical level, with a median of $1541.

📅 Best time to fly

December is historically the cheapest month to fly.

Historically, December is the cheapest month to fly from St. Louis to Seoul, with a median price of $822.

⏱️ Flight duration

Connecting flights typically take 32h 37m.

Flights from St. Louis to Seoul typically involve connecting flights, with a median duration of 32h 37m.

✈️ Airlines & availability

Connecting flights are dominant for this route.

Connecting flights are dominant for this route, with a median of 2 stopovers.

🏆 Airline highlight

Alaska Airlines, Inc. offers a recent deal for $1109.

A recent deal from Alaska Airlines, Inc. for $1109 is available from April 14-April 21.

🎯 Booking tip

Deals appear regularly for this route.

Historically, deals for flights from St. Louis to Seoul appear regularly within a 30-day window.

St. Louis main airports to depart from

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is a good option for flights from St. Louis to Seoul.

📍 ~20 km from St. Louis (reachable by car or public transport)

💸 Flights from ~$981

Seoul main airports to arrive at

Incheon International (ICN)

Cheapest

Incheon International Airport is a good option for flights from St. Louis to Seoul.

📍 ~48 km from Seoul (reachable by car)

💸 Flights from ~$1,072

Airports nearby Seoul used as alternative

Cheongju International (CJJ)

Cheongju International is a useful alternative, being the closest international airport to Seoul outside the capital region.

Seoul, South Korea

81% AI deal score

$6,280

$5,426

Save $854

Alaska Airlines, Inc., +1

Business Class

Frequently Asked Questions About Flights to Seoul

Cheap Flights from St. Louis to Seoul

Today’s best flight deals from St. Louis to Seoul

St. Louis to Seoul: Overview

Insights for flights from St. Louis to Seoul

How much is a round trip from St. Louis to Seoul

The cheapest time to fly from St. Louis to Seoul

Direct flights from St. Louis to Seoul

Last-minute flights going from St. Louis to Seoul

Biggest price drops on these dates for flights from St. Louis to Seoul

Popular Airports to fly from St. Louis to Seoul

St. Louis - Seoul route insights

Recent fares are above the typical level.

December is historically the cheapest month to fly.

Connecting flights typically take 32h 37m.

Connecting flights are dominant for this route.

Alaska Airlines, Inc. offers a recent deal for $1109.

Deals appear regularly for this route.

St. Louis main airports to depart from

Seoul main airports to arrive at

Airports nearby Seoul used as alternative

Business & First Class Flight Deals to Seoul

Best Elite deals to Seoul

Nov 13

Nov 22

Dec 10

Dec 20

Dec 10

Dec 10

Nov 10

Nov 21

Nov 13

Nov 13

Dec 10

Dec 03

Frequently Asked Questions About Flights to Seoul

How can I find cheap flights from St. Louis to Seoul?

When should I book flights from St. Louis to Seoul?

Should I compare nearby airports for flights from St. Louis to Seoul?

Are direct flights from St. Louis to Seoul always the best option?

Can flexible travel dates help on St. Louis to Seoul flights?

What extra costs should I check before booking St. Louis to Seoul flights?

Related routes

More routes from St. Louis

Flights to Seoul from other cities

St. Louis to Seoul: Overview

Insights for flights from St. Louis to Seoul

How much is a round trip from St. Louis to Seoul

The cheapest time to fly from St. Louis to Seoul

Direct flights from St. Louis to Seoul

Last-minute flights going from St. Louis to Seoul

Biggest price drops on these dates for flights from St. Louis to Seoul

Popular Airports to fly from St. Louis to Seoul

St. Louis - Seoul route insights

Recent fares are above the typical level.

December is historically the cheapest month to fly.

Connecting flights typically take 32h 37m.

Connecting flights are dominant for this route.

Alaska Airlines, Inc. offers a recent deal for $1109.

Deals appear regularly for this route.

St. Louis main airports to depart from

Seoul main airports to arrive at

Airports nearby Seoul used as alternative

Business & First Class Flight Deals to Seoul

Best Elite deals to Seoul

Nov 13

Nov 22

Dec 10

Dec 20

Dec 10

Dec 10

Nov 10

Nov 21

Nov 13

Nov 13

Dec 10

Dec 03

Frequently Asked Questions About Flights to Seoul

How can I find cheap flights from St. Louis to Seoul?

When should I book flights from St. Louis to Seoul?

Should I compare nearby airports for flights from St. Louis to Seoul?