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

Direct flights offer convenience by reducing travel time and avoiding layovers, but they are not always the most economical choice. Flights with one or more connections can sometimes be significantly cheaper. Consider your priorities for cost versus travel time.

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

Yes, having flexible travel dates can often lead to finding more affordable flight options. Prices can vary greatly depending on the day of the week or specific dates. Adjusting your departure or return by even a few days may result in significant savings.

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 2 days ago

405 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Jul 26, 2026.)

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

Explore current cheapest deals departing from St. Louis to Seoul

2026-09-14 – 2026-09-28
STL - Seoul
77% AI deal score
$786
$825
Round trip
2026-08-27 – 2026-08-31
STL - Seoul
87% AI deal score
$1,220
$925
Round trip
2026-10-01 – 2026-10-12
STL - Seoul
77% AI deal score
$1,024
$941
Round trip
2026-08-21 – 2026-09-05
STL - Seoul
79% AI deal score
$1,109
$968
Round trip
2026-08-11 – 2026-09-05
STL - Seoul
79% AI deal score
$1,090
$968
Round trip
2026-08-23 – 2026-09-05
STL - Seoul
79% AI deal score
$1,105
$968
Round trip
2026-08-15 – 2026-09-05
STL - Seoul
78% AI deal score
$1,087
$968
Round trip
2026-08-12 – 2026-09-05
STL - Seoul
79% AI deal score
$1,092
$968
Round trip
2026-08-11 – 2026-09-09
STL - Seoul
78% AI deal score
$1,090
$973
Round trip
2026-08-23 – 2026-09-09
STL - Seoul
79% AI deal score
$1,101
$973
Round trip

St. Louis to Seoul: Overview

Insights for flights from St. Louis to Seoul

Right now, only 6% of recent fares from St. Louis to Seoul are classified as a good price, indicating that current pricing may not be optimal for travelers. Fares for this route typically range from $1267–$1420, with a median of $1321. Currently, prices are below the typical level, which could present an opportunity for travelers seeking cheap flights from St. Louis to Seoul.

When considering the cheapest time to fly from St. Louis to Seoul, January stands out as the most affordable month, with a median fare of $369. Following January, December also offers competitive pricing, with a median fare of $485. March is another relatively inexpensive option, showing a median fare of $527.

A typical journey from St. Louis to Seoul takes approximately 38h 54m, including connections. Given that most itineraries connect at least once, this duration reflects the overall travel time rather than a non-stop flight. Most itineraries on this route involve 2 stopovers.

This route covers a significant distance of 10740 km, classifying it as a long-haul journey. This means you can expect a substantial travel time, often involving multiple segments and layovers to reach your destination.

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

Regular price: $718 - $1,523

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

The regular price range for this route is between $718 and $1523. The current lowest deal is $817 with United Airlines for travel from Sep 23-Sep 30.

now $817

Low $718

High $1,523

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

WestJet

United Airlines

Deutsche Luft Hansa

Last-minute flights going from St. Louis to Seoul

Sat, Aug 1

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Deutsche Luft Hansa

$1,499

$1,312

One-way

Sat, Aug 1

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Deutsche Luft Hansa

$1,318

$1,313

One-way

Mon, Aug 3

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Air Canada

$1,157

$1,335

One-way

Tue, Aug 4

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Deutsche Luft Hansa

$1,158

$1,258

One-way

Sat, Aug 8

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Deutsche Luft Hansa

$1,171

$1,308

One-way

Tue, Aug 11

⌛ Last-Minute

STL - Seoul

St. Louis (STL) - Seoul (ICN)

Frontier Airlines, WestJet

$1,081

$1,003

One-way

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

3 nights

Aug 30 - Sep 2

$1,228 → $971

21%

5 nights

Aug 28 - Sep 2

$1,195 → $971

19%

6 nights

Aug 27 - Sep 2

$1,178 → $965

18%

4 nights

Aug 1 - Aug 5

$1,499 → $1,312

12%

Popular Airports to fly from St. Louis to Seoul

St. Louis - Seoul route insights

💸 Price insights

Recent fares are below the typical level

Recent fares for St. Louis to Seoul are below the typical level, with 6% considered good prices.

📅 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

Flights are typically 38h 54m

Flights from St. Louis to Seoul typically take 38 hours and 54 minutes, with two stopovers.

✈️ Airlines & availability

Deals are frequent for this route

Deals for flights from St. Louis to Seoul are frequent, appearing often over a 30-day window.

🏆 Airline highlight

United Airlines offers a recent deal for $817

United Airlines recently offered a deal from St. Louis to Seoul for $817 via kiwi, Sep 23-Sep 30.

🎯 Booking tip

Consider flying in January for better prices

Historically, January offers the lowest median prices for this route, at $369.

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

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

Business & First Class Flight Deals to Seoul

84% AI deal score

$6,592

$4,918

Save $1,674

Frequently Asked Questions About Flights to Seoul

To find more affordable flights, consider being flexible with your travel dates and times. Comparing prices across different airlines and booking sites can often reveal better deals. Setting up price alerts may also help you catch drops in fares.

Booking in advance often provides more options and potentially better prices, though last-minute deals can sometimes appear. Monitoring price trends for your desired travel period can help you decide on an optimal booking time. Prices can fluctuate, so regular checks are useful.

Comparing nearby airports at both your origin and destination can sometimes uncover alternative flight options or better prices. While it may add to your ground travel time, the potential savings on airfare can be significant. Always factor in the total cost and convenience.

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: $718 - $1,523

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

The regular price range for this route is between $718 and $1523. The current lowest deal is $817 with United Airlines for travel from Sep 23-Sep 30.

now $817

Low $718

High $1,523

The cheapest time to fly from St. Louis to Seoul

January

Cheapest

Flights from $369

September

Most Expensive

Flights from $1,420

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec