Seoul to London GMP, ICN → LGW, LHR
Gimpo International Airport (GMP), Incheon International Airport (ICN) → London Gatwick Airport (LGW), London Heathrow Airport (LHR)
The cheapest return found recently is $593 with China Southern Airlines, 9 Nov – 29 Nov, found yesterday. The cheapest one-way found recently is $237 with China Southern Airlines, 22 Oct, found 3 days ago.
Return
The cheapest return fare on each of 4 departure dates is usually $602 to $649.
Cheapest return found recently
$593
9 Nov – 29 Nov · China Southern Airlines
Incheon International Airport (ICN) → London Gatwick Airport (LGW)
Leaves 9:40 p.m. · Return leaves 9:30 p.m. · 44 h 20 min of travel, both ways together
out 1 stop, back 1 stop
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$593 9 Nov – 29 Novfound yesterdaySee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $507 to $705.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 2 Nov to 9 Dec, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 20-night return fares leaving within 3 days of 9 Nov to compare.
Every date we hold
8 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 2 Nov – 19 Nov | $605 | China Eastern | Incheon International Airport (ICN) → London Heathrow Airport (LHR) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 9 Nov – 29 Nov | $593 | China Southern Airlines | Incheon International Airport (ICN) → London Gatwick Airport (LGW) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 30 Nov – 10 Dec | $689 | China Eastern | Incheon International Airport (ICN) → London Gatwick Airport (LGW) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 9 Dec – 23 Dec | $636 | China Eastern | Incheon International Airport (ICN) → London Heathrow Airport (LHR) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $593.
Airlines on the cheapest dates: China Eastern, China Southern Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$237
22 Oct · China Southern Airlines
Incheon International Airport (ICN) → London Heathrow Airport (LHR)
Leaves 9:25 a.m. · 16 h 40 min trip
stops unknown
found 3 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$237 22 Octfound 3 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 7 days, 1 Oct to 16 Oct, the cheapest one-way we saw each day was $237 to $443.
At $237, the cheapest one-way found recently is at the low end of that range.
7 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 22 Oct to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 22 Oct | $237 | China Southern Airlines | Incheon International Airport (ICN) → London Heathrow Airport (LHR) | stops unknown | found 3 days ago | Open this trip |
Airlines on the cheapest dates: China Southern Airlines.
Premium cabin fares from Seoul to London
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 9 Nov – 29 Nov in another cabin: Premium economy · Business · First
Today's prices for 22 Oct in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Seoul to London?
Return
Fares 7 to 13 days before departure were typically 7% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $602 | $602 | +7% | 9 |
| 7–13 days | $562 | $507 | Cheapest seen | 7 |
| 14–29 days | $589 | $507 | +5% | 11 |
| 60–89 days | $651 | $611 | +16% | 15 |
| 90–179 days | $689 | $673 | +23% | 12 |
| 180+ days | $893 | $821 | +59% | 13 |
One-way
Not enough history yet: in 7 days of one-way prices, 1 Oct to 16 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
One-way
Cheongju → London
112 km from Seoul
$247
$10 more than flying from Seoul
22 Oct · CJJ → LGW · 1 stop
found 5 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 9 Nov – 29 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work