
Most accurate provider | Mytrip 3 stars  | 
|---|---|
Most trusted provider | Mytrip 3 stars  | 
Round-trip from | $540 (CheapOair)  | 
One-way from | $233 (Kiwi.com)  | 
Popular in | October | 
Cheapest in | December | 
Average price | $803 | 
Good round-trip deal | $679 or less | 
Good one-way deal | $526 or less | 
Fly from
Fly to
Route
Depart
Return
Price
SeoulLondon
GMP - LHR
GMPLHR
Seoul Gimpo Intl
Sun 11/16
2:25 pm-5:50 pm
1 stop36h 25m
London Heathrow
Sun 11/23
8:25 pm-1:05 pm
1 stop31h 40m
SeoulLondon
GMP - LHR
GMPLHR
Seoul Gimpo Intl
Sun 12/14
2:25 pm-5:50 pm
1 stop36h 25m
London Heathrow
Tue 12/23
5:40 pm-1:05 pm
1 stop34h 25m
IncheonLondon
ICN - LHR
ICNLHR
Incheon Intl
Mon 2/16
11:45 pm-9:20 am
1 stop18h 35m
London Heathrow
Mon 2/23
7:50 pm-7:00 pm
2 stops38h 10m
IncheonLondon
ICN - LHR
ICNLHR
Incheon Intl
Sun 12/21
2:15 pm-7:10 pm
2 stops37h 55m
London Heathrow
Wed 1/14
9:10 pm-1:15 pm
2 stops31h 05m
IncheonLondon
ICN - LHR
ICNLHR
Incheon Intl
Thu 12/4
11:05 pm-10:30 am
2 stops20h 25m
London Heathrow
Thu 12/11
3:45 pm-4:55 pm
1 stop16h 10m
IncheonLondon
ICN - LHR
ICNLHR
Incheon Intl
Wed 12/31
1:05 pm-8:05 am
2 stops28h 00m
London Heathrow
Fri 1/16
11:10 am-11:15 am
1 stop15h 05m
SeoulLondon
GMP - LHR
GMPLHR
Seoul Gimpo Intl
Fri 12/26
2:25 pm-3:55 pm
1 stop34h 30m
London Heathrow
Sun 1/4
7:10 am-1:05 pm
2 stops20h 55m
SeoulLondon
GMP - LHR
GMPLHR
Seoul Gimpo Intl
Tue 12/23
2:25 pm-3:55 pm
1 stop34h 30m
London Heathrow
Sat 1/3
5:40 pm-1:05 pm
1 stop34h 25m
IncheonLondon
ICN - LHR
ICNLHR
Incheon Intl
Fri 11/21
2:55 pm-7:10 pm
1 stop37h 15m
London Heathrow
Fri 11/28
9:10 pm-1:15 pm
2 stops31h 05m
IncheonLondon
ICN - LHR
ICNLHR
Incheon Intl
Thu 11/27
12:25 pm-6:05 pm
Nonstop14h 40m
London Heathrow
Wed 12/3
8:10 pm-5:50 pm
Nonstop12h 40m
| Provider | Price Accuracy | Trust Score* | 
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | 
The best time to book flights from Seoul to London Heathrow Airport is 67 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, November is the cheapest month in which you can book a flight from Seoul to London Heathrow Airport (average of $471). Flying from Seoul to London Heathrow Airport in July is currently the most expensive (average of $750). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s typically best to fly out from Seoul to London Heathrow Airport in the afternoon. Doing so could potentially save you 29% on the flight price compared to flying at noon, which is usually more expensive.
The most flights from SEL to LHR are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).
Comfort
Food
Entertainment
Crew
Overall
Boarding
Reviews
Jacqueline,Aug 2025
ICN - SEA
Comfort
Food
Entertainment
Crew
Overall
Boarding
Reviews
Jacqueline,Aug 2025
ICN - SEA
Comfort
Food
Entertainment
Crew
Overall
Boarding
Reviews
Jacqueline,Aug 2025
ICN - SEA
Comfort
Food
Entertainment
Crew
Overall
Boarding
Reviews
Jacqueline,Aug 2025
ICN - SEA
Comfort
Food
Entertainment
Crew
Overall
Boarding
Reviews
Jacqueline,Aug 2025
ICN - SEA
| Airline | Cheapest | Average | Flexibility | On-time | 
|---|---|---|---|---|
| Cheapest$600 | Average$730 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$629 | Average$890 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$754 | Average$1,132 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$847 | Average$1,103 | FlexibilityNo cancel fee | On-time81% |