Cheap flights from St. Louis to Seoul from £401
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How much do flights to Seoul cost?
Cheapest one-way trip | £401 |
|---|---|
Cheapest round-trip | £849 |
Average round-trip | £1,205 |
Includes rare itinerary | |
Most popular airline | Alaska Airlines |
Getting from Seoul airports to the city center
Fastest options: AREX Express Train (ICN), KTX (ICN). Best value: AREX All-Stop Train, airport limousine buses.
How to get from Incheon International Airport (ICN) to Seoul?
Transport Option | Typical Time | Typical Cost | Frequency | Best For |
|---|---|---|---|---|
43 min | non-stop express service | every 30–40 min (traffic dependent) | fastest to Seoul Station | |
58-66 min | varies by destination station | every 6–12 min (traffic dependent) | budget travelers | |
60-90 min | varies by route and destination | every 15–30 min (traffic dependent) | direct to hotels | |
50-80 min | metered; toll fees extra | on-demand 24/7 (traffic dependent) | door-to-door convenience |
How to get from Gimpo International Airport (GMP) to Seoul?
Transport Option | Typical Time | Typical Cost | Frequency | Best For |
|---|---|---|---|---|
20-35 min | T-money card fare | every 3–6 min (traffic dependent) | quick and affordable | |
20-25 min | all-stop service only | every 6–12 min (traffic dependent) | connecting to KTX | |
30-60 min | varies by route | every 10–20 min (traffic dependent) | direct to Gangnam area | |
25-50 min | metered fare | on-demand 24/7 (traffic dependent) | late night arrivals |
Notes:
- Prices in KRW (₩9,500 ≈ $7 USD); table created in 2025 and subject to change.
- T-money transportation cards are accepted on AREX All-Stop trains, Seoul Metro, and buses with discounted fares.
- AREX Express Train requires a separate ticket and does not accept T-money cards.
- Taxi fares are metered; expressway tolls are charged separately. Traffic can significantly affect journey times.
- We recommend checking official transport websites for your travel planning.
Updated: December 2025
Key info about flying to Seoul
Check-in for a flight from St. Louis to Seoul
| Name | Carrier code | IATA Code | Passport needed during booking |
|---|---|---|---|
| Alaska Airlines | ASA | AS | No |
| Frontier Airlines | FFT | F9 | No |
| EVA Air | EVA | BR | Yes |
| WestJet | WJA | WS | No |
| Korean Air | KAL | KE | Yes |
Online check-in is not available for these airlines.
Weather in Seoul
Average Weather
| Month | Average monthly max temperature | Average monthly min temperature |
| January | 1°C | -5°C |
| February | 4°C | -2°C |
| March | 11°C | 2°C |
| April | 17°C | 7°C |
| May | 22°C | 12°C |
| June | 27°C | 18°C |
| July | 29°C | 22°C |
| August | 29°C | 22°C |
| September | 26°C | 17°C |
| October | 19°C | 11°C |
| November | 11°C | 4°C |
| December | 2°C | -3°C |
14 day forecast
Frequently asked questions
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