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STL to ICN: distance & flight time
St. Louis (St Louis Lambert International Airport) → Seoul (Incheon International Airport)
6,674 mi
10,740 km · 5,799 nm
13h 33m
estimated nonstop flight time
+14h
time difference · heading northwest
See live STL→ICN fares Phone-only fares on this route — call free
Flight time details
6,674 miles nonstop takes roughly 13h 33m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- STL — St Louis Lambert International Airport · St. Louis, United States
- ICN — Incheon International Airport · Seoul, South Korea
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near STL
- SUS · Spirit of St Louis Airport16 mi away
- ALN · St Louis Regional Airport20 mi away
- BLV · Scott AFB/Midamerica Airport32 mi away
- SPI · Abraham Lincoln Capital Airport84 mi away
Near ICN
- GMP · Gimpo International Airport20 mi away
- SWU · Suwon Airport34 mi away
- SSN · Seoul Air Base (K-16)36 mi away
- OSN · Osan Air Base41 mi away
Frequently asked questions
How far is STL from ICN?
The flight distance from St. Louis (STL) to Seoul (ICN) is 6,674 miles (10,740 km, 5,799 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from STL to ICN?
A nonstop flight takes about 13h 33m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from STL to ICN?
Nonstop service on STL–ICN depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 13h 33m nonstop estimate.
What is the time difference between St. Louis and Seoul?
Seoul is 14 hours ahead of St. Louis.
What is the cheapest way to fly from STL to ICN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STL–ICN that never appear on search engines, with no booking fees.
Why are some STL to ICN fares phone-only?
Consolidator contracts let us sell certain STL–ICN tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.