How to think about this route
Non-stops run on several carriers and are usually the simplest choice. One-stop tickets via the Gulf or Europe can undercut peak weeks if you accept longer travel time — compare total journey time, not only time in the air.
Before choosing, compare the full journey: travel to your London airport, security time, connection buffers, AREX or taxi transfer and check-in time at your hotel.
London airport choices
Heathrow (LHR) carries most premium and full-service long-haul choice to Seoul. Gatwick (LGW) can work for some schedules with different baggage rules. Weigh train time to Heathrow against other airports — the cheapest fare is not always the quickest start to a long sector.
If the fare difference is small, a better-timed non-stop can beat a cheaper-looking ticket with a long layover.
London airports — quick compare
| Airport | Best For | Main Advantage | Main Drawback |
|---|---|---|---|
| Heathrow (LHR) | West London; full-service | Frequency / connections | Peak queues; often dearer headlines |
| Gatwick (LGW) | South / south-east | Strong leisure short-haul | Awkward from north of the river |
| Stansted (STN) | North-east / Essex; low headlines | Often cheapest ticket | Express + cross-London time |
| Luton (LTN) | North / M1 corridor | Regular low-cost schedules | Early starts; DART/coach hops |
Airlines on this route
Korean Air, Asiana, British Airways partners and others appear. Most use ICN.
Seoul arrival airports
Incheon (ICN) is Seoul's main international airport west of the city. The AREX train and taxis reach central districts; allow time for immigration at peak hours. Airport rail suits light luggage; taxis help late arrivals with heavy bags.
Three to five nights works for food, palaces and a first feel for the city before onward travel to Japan or Southeast Asia.
Seoul airports — quick compare
| Airport | Best For | Transfer to centre / resort | Main Drawback |
|---|---|---|---|
| Incheon (ICN) | Default long-haul | AREX / bus toward Seoul ~45–75 min | Large hub; follow immigration signs |
Airport transfers — quick guide
- Heathrow: Elizabeth line or Piccadilly; Express is faster and dearer. Allow peak security time.
- Gatwick: Gatwick Express or Thameslink. Clean from south London; slower if you start north.
- Stansted: Stansted Express to Liverpool Street, then Tube. Price that before a “cheap” fare wins.
- Luton: DART to Parkway, then rail into London. Fine with a cabin bag; slower with two hold cases.
- ICN: AREX Express is the simplest rail into Seoul Station. Buses cover many hotel districts too.
When to compare and book
Spring and autumn balance weather and fares. UK school holidays and Korean peak travel lift prices quickly.
Start comparing roughly eight to twelve weeks ahead for Christmas and summer if dates are fixed. For routine trips outside peak weeks, six to ten weeks is often enough if you can shift dates.
Baggage and fare details
Review baggage rules on long-haul segments and any separate domestic add-ons before you pay. Seat selection and priority boarding vary by airline and fare family.
Confirm latest entry guidance for your nationality — requirements change and airlines will not refund if you cannot travel.
Seoul planning after you land
If Seoul is your first stop, choose your neighbourhood before booking day trips. Myeongdong and Hongdae suit different pacing; Insadong and Jongno suit palace-focused visits. For wider Korea trips, check KTX times before locking the hotel.
Use the Seoul stays guide for neighbourhoods, then compare Seoul experiences. Car hire is rarely needed in the city.