Route brief · LON → SEL
London → Seoul
$570
−25% vs typical
seasonal median $760 · difference $190
Sep 18 – Sep 30 · 12 nights
Air China1 stop
- Usual monthly lows
- $655–$836
- Board rank
- Stronger than 69%
- Route sample
- 8 observed months
Cached fare — the booking search re-prices live before you pay.
Destination briefSELSeoulPalaces wedged between skyscrapers, barbecue smoke at midnight, cafés that outnumber people.Best windowApr–May · Sep–OctAirportsIncheon (ICN) · Gimpo (GMP)All routes into SeoulWhen this route gets cheap.
Cached-fare history: across 8 months, Sep is the cheapest for LON → SEL. Best time to be there: Apr–May · Sep–Oct.
Fares bottom out in September around $570 and peak in December near $969 — a $399 spread across the 8 months we track. The cheapest itinerary we are tracking makes one stop and takes about 14 hours outbound, on a 12-night trip — ticketed under Air China, which on a connecting fare need not operate every leg. At $570 for 8,857 km each way, that works out to about $32 per 1,000 km flown. That is below the $44 typical of long-haul fares here. Across the 30 departure cities we track at a similar distance from Seoul, this fare ranks 6th — 18% above the $484 from Istanbul. That puts it in the cheaper half of the 39 routes of similar length we watch out of London, where the middle fare is $642.
Cheapest day in the next 4 months: Sep 18 · $570 (25% below median)
Tap any day → live search
The median cached fare across this calendar is 11% higher than when tracking began on Aug 8 — $697 then versus $771 now, across 5 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $533, on Sep 9.
September 2026
November 2026
Cheapest in Sep · around $570
25% below the $760 typical fare
Cheapest round-trip fare found per month · London → Seoul · cached-price history
Route facts
- Airports
- Heathrow (LHR) · Gatwick (LGW) · Stansted (STN) · Luton (LTN) ↔ Incheon (ICN) · Gimpo (GMP)
- Flight time
- ~14 hours outbound
- Distance
- ~8,857 km each way
- Typical price
- $760 round-trip (seasonal median)
- Airlines on the board
- Air China
- Itineraries
- Connections on current fares
- Best months to visit
- Apr–May · Sep–Oct
LON → SEL, answered.
Is $570 a good price for London to Seoul?
Yes — the seasonal median for this route is around $760 round-trip. At $570 you're 25% below that, saving about $190, which we rate good for this route.
What is the cheapest month to fly from London to Seoul?
Across 8 months of cached-fare history, Sep comes out cheapest on this route. The best months to actually be in Seoul are Apr–May · Sep–Oct — when those overlap, that's your window.
How far in advance should I book LON → Seoul?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. What we can measure is which month is cheap: across 8 months of cached fares, Sep comes out lowest on this route. See /guides/what-moves-a-flight-price/ for what does move a fare.
Are there nonstop flights from London to Seoul?
The current cheapest fares involve a connection, ticketed under Air China. Nonstop options exist on many dates at higher prices — check the live search for your exact dates.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on September 1). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Seoul?
Lock the flight first — then compare stays for Sep 18 – Sep 30 · 12 nights.
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Missed it?
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