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 24 days ago

486,190 searches this week

171 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated May 29, 2026.)

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

Explore current cheapest deals departing from St. Louis to Seoul

Round trip

Sort by: Cheapest

August 13 - August 26

Cheapest

STL - Seoul

$1,128

$1,089

Round trip

August 9 - August 24

Earliest

STL - Seoul

$1,096

$1,136

Round trip

September 3 - September 10

STL - Seoul

$825

$1,139

Round trip

September 5 - September 20

STL - Seoul

$795

$1,143

Round trip

August 11 - August 23

STL - Seoul

$1,115

$1,149

Round trip

October 5 - October 13

Best

STL - Seoul

$1,116

$1,175

Round trip

October 6 - October 29

STL - Seoul

$1,112

$1,178

Round trip

November 18 - November 25

STL - Seoul

$1,073

$1,192

Round trip

November 2 - November 16

STL - Seoul

$1,088

$1,205

Round trip

November 14 - November 29

STL - Seoul

$1,082

$1,233

Round trip

Unlock all 500+ flight deals to Seoul and get alerts when great deals appear

Route Intelligence — 486,190 Searches this Week

Insights for flights from St. Louis to Seoul

Right now, only 1% of recent fares from St. Louis to Seoul are classified as a good price. For travelers looking for cheap flights from St. Louis to Seoul, fares typically range from $836–$1420, with a median of $1267. Current fares are near the typical level, suggesting prices are in line with recent trends.

A typical journey from St. Louis to Seoul takes about 38h 54m, including connections. This is a long-haul route, covering a significant distance of 10740 kilometers. Since most itineraries connect at least once, the total travel time reflects the layovers involved in reaching Seoul from St. Louis.

When is the cheapest time to fly from St. Louis to Seoul? The data indicates that January is typically the most affordable month, with a median fare of $369. Following closely, December offers a median fare of $485, and March presents another cost-effective option with a median fare of $527. These months offer significantly lower prices compared to the overall median.

There are no direct flights from St. Louis to Seoul; most itineraries connect at least once. In fact, 0% of recent fares were non-stop. For connecting flights, the typical number of stopovers is 2, which contributes to the overall journey time. New deals for this route appear almost daily, so setting up a price alert can be beneficial.

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

Regular price: $949 - $1,823

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

Regular prices for flights from St. Louis to Seoul typically range from $949 to $1823. The current lowest deal is $1089 with Frontier Airlines for travel from Aug 13-Aug 26.

now $1,089

Low $949

High $1,823

The cheapest time to fly from St. Louis to Seoul

The cheapest month to fly from St. Louis to Seoul is January, with a median price of $369. The most expensive month is September, with a median price of $1420. Prices are generally lower from January to December.

January

Cheapest

Flights from $369

September

Most Expensive

Flights from $1,420

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from St. Louis to Seoul

Frontier Airlines

Air Canada

United Airlines

WestJet

Last-minute flights going from St. Louis to Seoul

Sun, Jun 21

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Asiana Airlines

$1,257

$1,608

One-way

Mon, Jun 22

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Cathay Pacific

$1,257

$1,610

One-way

Thu, Jul 2

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Air Canada

$1,155

$1,421

One-way

Sun, Jul 5

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

WestJet, T'way Air

$1,220

$1,493

One-way

Sun, Jul 5

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

WestJet

$1,143

$1,495

One-way

Tue, Jul 7

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Alaska Airlines, Inc., Asiana Airlines

$1,163

$1,602

One-way

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

13 nights

Aug 13 - Aug 26

$1,128 → $1,089

10 nights

Oct 12 - Oct 22

$1,328 → $1,304

12 nights

Aug 11 - Aug 23

$1,115 → $1,149

15 nights

Aug 9 - Aug 24

$1,096 → $1,136

Popular Airports to fly from St. Louis to Seoul

St. Louis - Seoul route insights

💸 Price insights

Recent fares are near the typical level

Recent fares for St. Louis to Seoul are near the typical level for this route.

📅 Best time to fly

January is historically cheapest at $369

Historically, January is the cheapest month to fly from St. Louis to Seoul, with a median price of $369.

⏱️ Flight duration

Connecting flights average 38h 54m

Flights from St. Louis to Seoul typically involve connections, with an average total travel time of 38h 54m.

✈️ Airlines & availability

Connecting flights are dominant

This route is primarily served by connecting flights, with no direct options available.

🏆 Airline highlight

Frontier Airlines offers deals

Frontier Airlines has historically offered deals on connecting flights for this route.

🎯 Booking tip

Deals are frequent for this route

Deals for flights from St. Louis to Seoul are frequent, with over 1 deal per day historically.

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 city center (reachable by car)

💸 Flights from ~$1089

Seoul main airports to arrive at

Incheon International (ICN)

Cheapest

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

📍 ~50 km from city center (reachable by car)

💸 Flights from ~$1089

Gimpo International (GMP)

Gimpo International Airport is an alternative arrival airport for flights to Seoul from St. Louis.

📍 ~15 km from city center (reachable by car)

💸 Flights from ~$1373

Airports nearby Seoul used as alternative

Cheongju International (CJJ)

Cheongju International is a practical alternative due to its proximity and international status, despite fewer long-haul options.

📍 ~115 km from Seoul (reachable by express bus and rail services)

💸 Flights from ~$1258

Gimhae International (PUS)

Cheapest

Gimhae International is a major international gateway with a vast network, highly accessible via KTX high-speed rail.

📍 ~320 km from Seoul (reachable by KTX high-speed rail)

💸 Flights from ~$1170

Daegu International (TAE)

Daegu International offers a good selection of international regional flights and is directly accessible via high-speed rail.

📍 ~240 km from Seoul (reachable by high-speed rail)

💸 Flights from ~$1205

Wonju (WJU)

Wonju is geographically the closest candidate airport to Seoul, useful for specific domestic connections.

📍 ~90 km from Seoul (reachable by car)

💸 Flights from ~$1705

Gwangju (KWJ)

Gwangju is a major regional airport with KTX connectivity, an alternative for domestic travel.

📍 ~270 km from Seoul (reachable by KTX)

💸 Flights from ~$1832

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

Aug 14

Seoul, South Korea

89% AI deal score

$6,324

$4,864

Save $1,460

From STL

Elite

Aug 14

Seoul, South Korea

89% AI deal score

$6,567

$5,004

Save $1,563

From STL

Elite

Jul 28

Seoul, South Korea

84% AI deal score

$6,433

$4,742

Save $1,691

From STL

Elite

Jul 28

Seoul, South Korea

84% AI deal score

$6,469

$4,746

Save $1,723

From STL

Elite

Jul 28

Seoul, South Korea

84% AI deal score

$6,469

$4,772

Save $1,697

From STL

Elite

Jul 19

Seoul, South Korea

84% AI deal score

$6,478

$4,798

Save $1,680

From STL

Elite

Aug 05

Seoul, South Korea

84% AI deal score

$6,111

$4,826

Save $1,285

From STL

Elite

Jul 19

Seoul, South Korea

84% AI deal score

$6,469

$4,858

Save $1,611

From STL

Elite

Jul 18

Seoul, South Korea

84% AI deal score

$6,471

$4,859

Save $1,612

From STL

Elite

Aug 02

Seoul, South Korea

84% AI deal score

$6,264

$4,894

Save $1,370

From STL

Elite

Aug 12

Seoul, South Korea

84% AI deal score

$6,324

$4,917

Save $1,407

From STL

Elite

Jul 18

Seoul, South Korea

84% AI deal score

$6,592

$4,918

Save $1,674

From STL

Elite

Aug 13

Seoul, South Korea

84% AI deal score

$6,453

$4,981

Save $1,472

From STL

Elite

Dec 12

Seoul, South Korea

84% AI deal score

$26,630

$21,666

Save $4,964

From STL

Elite

Dec 12

Seoul, South Korea

84% AI deal score

$26,914

$21,684

Save $5,230

From STL

Elite

Aug 05

Seoul, South Korea

83% AI deal score

$6,095

$4,856

Save $1,239

From STL

Elite

Jul 28

Seoul, South Korea

83% AI deal score

$6,469

$4,969

Save $1,500

From STL

Elite

Jul 28

Seoul, South Korea

83% AI deal score

$6,469

$4,969

Save $1,500

From STL

Elite

Aug 04

Seoul, South Korea

83% AI deal score

$6,092

$4,981

Save $1,111

From STL

Elite

Aug 06

Seoul, South Korea

83% AI deal score

$6,130

$4,981

Save $1,149

From STL

Elite

Aug 11

Seoul, South Korea

83% AI deal score

$6,201

$4,985

Save $1,216

From STL

Elite

Aug 14

Seoul, South Korea

83% AI deal score

$6,153

$4,987

Save $1,166

From STL

Elite

Aug 03

Seoul, South Korea

83% AI deal score

$6,271

$4,998

Save $1,273

From STL

Elite

Aug 08

Seoul, South Korea

83% AI deal score

$6,138

$5,004

Save $1,134

From STL

Elite

Aug 07

Seoul, South Korea

83% AI deal score

$6,138

$5,004

Save $1,134

From STL

Elite

Jul 30

Seoul, South Korea

83% AI deal score

$6,499

$5,020

Save $1,479

From STL

Elite

Oct 28

Seoul, South Korea

83% AI deal score

$6,399

$5,097

Save $1,302

From STL

Elite

Oct 25

Seoul, South Korea

83% AI deal score

$6,578

$5,401

Save $1,177

From STL

Elite

Oct 31

Seoul, South Korea

83% AI deal score

$25,985

$21,625

Save $4,360

From STL

Elite

Oct 21

Seoul, South Korea

83% AI deal score

$26,206

$21,646

Save $4,560

From STL

Elite

Dec 05

Seoul, South Korea

83% AI deal score

$26,023

$21,659

Save $4,364

From STL

Elite

Oct 26

Seoul, South Korea

83% AI deal score

$25,968

$21,684

Save $4,284

From STL

Elite

Aug 05

Seoul, South Korea

82% AI deal score

$5,957

$4,980

Save $977

From STL

Elite

Aug 05

Seoul, South Korea

82% AI deal score

$5,998

$4,987

Save $1,011

From STL

Elite

Aug 14

Seoul, South Korea

82% AI deal score

$5,960

$4,995

Save $965

From STL

Elite

Aug 05

Seoul, South Korea

82% AI deal score

$6,067

$5,052

Save $1,015

From STL

Elite

Oct 29

Seoul, South Korea

82% AI deal score

$24,692

$21,649

Save $3,043

From STL

Elite

Dec 05

Seoul, South Korea

82% AI deal score

$24,775

$21,659

Save $3,116

From STL

Elite

Sep 28

Seoul, South Korea

82% AI deal score

$26,360

$22,374

Save $3,986

From STL

Elite

Oct 08

Seoul, South Korea

81% AI deal score

$23,937

$21,670

Save $2,267

From STL

Elite

Aug 13

Seoul, South Korea

81% AI deal score

$24,905

$22,035

Save $2,870

From STL

Elite

Sep 29

Seoul, South Korea

81% AI deal score

$25,027

$22,076

Save $2,951

From STL

Elite

Sep 01

Seoul, South Korea

81% AI deal score

$24,703

$22,256

Save $2,447

From STL

Elite

Oct 26

Seoul, South Korea

81% AI deal score

$24,658

$22,470

Save $2,188

From STL

Elite

Oct 21

Seoul, South Korea

80% AI deal score

$6,421

$5,705

Save $716

From STL

Elite

Oct 28

Seoul, South Korea

80% AI deal score

$23,545

$21,625

Save $1,920

From STL

Elite

Oct 08

Seoul, South Korea

80% AI deal score

$23,340

$21,670

Save $1,670

From STL

Elite

Jul 08

Seoul, South Korea

80% AI deal score

$23,563

$22,002

Save $1,561

From STL

Elite

Sep 28

Seoul, South Korea

80% AI deal score

$23,916

$22,076

Save $1,840

From STL

Elite

Sep 12

Seoul, South Korea

80% AI deal score

$23,777

$22,076

Save $1,701

From STL

Elite

Oct 21

Seoul, South Korea

79% AI deal score

$6,421

$6,030

Save $391

From STL

Elite

Oct 07

Seoul, South Korea

79% AI deal score

$6,348

$6,030

Save $318

From STL

Elite

Oct 17

Seoul, South Korea

79% AI deal score

$22,793

$21,623

Save $1,170

From STL

Elite

Oct 21

Seoul, South Korea

79% AI deal score

$22,261

$21,625

Save $636

From STL

Elite

Oct 16

Seoul, South Korea

79% AI deal score

$22,890

$21,670

Save $1,220

From STL

Elite

Sep 30

Seoul, South Korea

79% AI deal score

$22,329

$21,674

Save $655

From STL

Elite

Oct 18

Seoul, South Korea

79% AI deal score

$22,570

$21,676

Save $894

From STL

Elite

Jul 31

Seoul, South Korea

79% AI deal score

$23,621

$22,466

Save $1,155

From STL

Elite

Oct 21

Seoul, South Korea

79% AI deal score

$2,811

$2,681

Save $130

From STL

Elite

Jul 26

Seoul, South Korea

79% AI deal score

$2,904

$2,735

Save $169

From STL

Elite

Oct 24

Seoul, South Korea

77% AI deal score

$21,623

From STL

Elite

Dec 05

Seoul, South Korea

77% AI deal score

$21,666

From STL

Elite

Dec 05

Seoul, South Korea

77% AI deal score

$21,684

From STL

Elite

Nov 03

Seoul, South Korea

77% AI deal score

$2,718

$2,681

Save $37

From STL

Elite

Nov 11

Seoul, South Korea

77% AI deal score

$2,708

$2,681

Save $27

From STL

Elite

Nov 01

Seoul, South Korea

77% AI deal score

$2,717

$2,689

Save $28

From STL

Elite

Nov 24

Seoul, South Korea

77% AI deal score

$2,754

$2,731

Save $23

From STL

Elite

Jul 12

Seoul, South Korea

77% AI deal score

$2,922

From STL

Elite

Jul 29

Seoul, South Korea

76% AI deal score

$7,552

From STL

Elite

Jul 23

Seoul, South Korea

76% AI deal score

$7,552

From STL

Elite

Jul 27

Seoul, South Korea

76% AI deal score

$7,554

From STL

Elite

Oct 21

Seoul, South Korea

76% AI deal score

$21,659

From STL

Elite

Oct 21

Seoul, South Korea

76% AI deal score

$21,659

From STL

Elite

Aug 17

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 12

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 12

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 19

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 19

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 18

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 17

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 18

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 13

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 13

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 18

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 19

Seoul, South Korea

76% AI deal score

$2,998

From STL

Elite

Aug 16

Seoul, South Korea

76% AI deal score

$3,020

From STL

Elite

Aug 14

Seoul, South Korea

76% AI deal score

$3,020

From STL

Elite

Aug 15

Seoul, South Korea

76% AI deal score

$3,020

From STL

Elite

Aug 16

Seoul, South Korea

76% AI deal score

$3,020

From STL

Elite

Aug 14

Seoul, South Korea

76% AI deal score

$3,020

From STL

Elite

Aug 15

Seoul, South Korea

76% AI deal score

$3,020

From STL

Elite

Jul 17

Seoul, South Korea

76% AI deal score

$3,028

From STL

Elite

Jul 19

Seoul, South Korea

76% AI deal score

$3,033

From STL

Elite

Aug 12

Seoul, South Korea

76% AI deal score

$3,050

From STL

Elite

Aug 13

Seoul, South Korea

76% AI deal score

$3,050

From STL

Elite

Aug 06

Seoul, South Korea

76% AI deal score

$3,050

From STL

Elite

Aug 04

Seoul, South Korea

76% AI deal score

$3,050

From STL

Elite

Aug 14

Seoul, South Korea

76% AI deal score

$3,072

From STL

Elite

Aug 08

Seoul, South Korea

76% AI deal score

$3,072

From STL

Elite

Aug 15

Seoul, South Korea

76% AI deal score

$3,072

Frequently Asked Questions About Flights to Seoul

To find more affordable flights, consider being flexible with your travel dates and times. Using flight comparison sites can help you see various options across different airlines. Sometimes, booking flights with layovers can also lead to lower prices compared to direct routes.

Booking flights well in advance, often several months before your intended departure, may help secure better prices. However, last-minute deals can sometimes appear, though they are less predictable. Monitoring price trends for your desired route can also be beneficial.

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

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