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Cheap flights from Seoul to London from $311

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seoul to London departing on 12/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seoul to London (SEL-LHR)

Cheap round-trip flights

Air China Logo
2:25 pm - 8:30 pmGMP-LHR
14h 05m1 stop
Air China Logo
8:25 pm - 1:05 pmLHR-GMP
32h 40m1 stop
$714Air China
Find Deal
Wed, Sep 10 - Wed, Sep 17
China Southern Logo
1:45 pm - 5:55 pmGMP-LHR
37h 10m1 stop
China Southern Logo
9:30 pm - 12:25 pmLHR-GMP
29h 55m1 stop
$718China Southern
Find Deal
Tue, Dec 23 - Sat, Jan 3
Scandinavian Airlines Logo
11:45 pm - 2:35 pmICN-LHR
22h 50m2 stops
Scandinavian Airlines Logo
3:35 pm - 6:15 pmLHR-ICN
42h 40m2 stops
$736Scandinavian Airlines
Find Deal
Mon, Sep 15 - Sat, Sep 20
Lufthansa Logo
1:05 pm - 8:05 amICN-LHR
28h 00m2 stops
Lufthansa Logo
11:30 am - 10:50 amLHR-ICN
14h 20m1 stop
$737Lufthansa
Find Deal
Tue, Jan 20 - Sat, Feb 7
Lufthansa Logo
1:05 pm - 8:05 amICN-LHR
28h 00m2 stops
Lufthansa Logo
8:45 am - 11:15 amLHR-ICN
17h 30m1 stop
$738Lufthansa
Find Deal
Thu, Jan 29 - Sat, Jan 31
Scandinavian Airlines Logo
11:45 pm - 4:00 pmICN-LHR
24h 15m1 stop
Scandinavian Airlines Logo
5:00 pm - 6:15 pmLHR-ICN
17h 15m1 stop
$745Scandinavian Airlines
Find Deal
Mon, Sep 15 - Wed, Aug 19
Finnair Logo
11:00 pm - 8:40 pmICN-LHR
30h 40m1 stop
Finnair Logo
4:15 pm - 12:25 pmLHR-ICN
35h 10m1 stop
$747Finnair
Find Deal
Mon, Jan 26 - Wed, Feb 11
Finnair Logo
11:00 pm - 8:40 pmICN-LHR
30h 40m1 stop
Finnair Logo
6:10 pm - 12:25 pmLHR-ICN
33h 15m1 stop
$750Finnair
Find Deal
Mon, Jan 26 - Wed, Feb 11
Logo
11:45 pm - 9:20 amICN-LHR
17h 35m1 stop
Logo
10:00 pm - 12:55 pmLHR-ICN
30h 55m1 stop
$752
Find Deal
Sat, Sep 20 - Thu, Oct 16
Logo
11:45 pm - 9:20 amICN-LHR
17h 35m1 stop
Logo
10:00 pm - 8:45 pmLHR-ICN
38h 45m2 stops
$759
Find Deal
Sat, Sep 20 - Mon, Oct 13

SWISS flights from Seoul to London Heathrow Airport

Our best SWISS deals on Seoul to London Heathrow Airport flight tickets
SWISS
Sep 8
ICN10:05 amIncheon Intl
30h 10m
2 stops
LHR8:15 amLondon Heathrow
Sep 14
LHR6:00 amLondon Heathrow
18h 25m
1 stop
ICN8:25 amIncheon Intl
$763
Find similar
SWISS
Sep 8
ICN10:05 amIncheon Intl
30h 10m
2 stops
LHR8:15 amLondon Heathrow
Sep 14
LHR6:00 amLondon Heathrow
18h 25m
1 stop
ICN8:25 amIncheon Intl
$764
Find similar
SWISS
Sep 3
ICN10:05 amIncheon Intl
38h 30m
2 stops
LHR4:35 pmLondon Heathrow
Sep 9
LHR8:45 amLondon Heathrow
15h 40m
1 stop
ICN8:25 amIncheon Intl
$770
Find similar

Air China flights from Seoul to London Heathrow Airport

Our best Air China deals on Seoul to London Heathrow Airport flight tickets
Air China
Sep 10
GMP2:25 pmSeoul Gimpo Intl
14h 05m
1 stop
LHR8:30 pmLondon Heathrow
Sep 17
LHR8:25 pmLondon Heathrow
32h 40m
1 stop
GMP1:05 pmSeoul Gimpo Intl
$714
Find similar
Air China
Sep 10
GMP2:25 pmSeoul Gimpo Intl
14h 05m
1 stop
LHR8:30 pmLondon Heathrow
Sep 15
LHR8:25 pmLondon Heathrow
32h 40m
1 stop
GMP1:05 pmSeoul Gimpo Intl
$729
Find similar
Air China
Sep 22
ICN1:05 pmIncheon Intl
15h 25m
1 stop
LHR8:30 pmLondon Heathrow
Oct 18
LHR10:00 pmLondon Heathrow
30h 55m
1 stop
ICN12:55 pmIncheon Intl
$770
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seoul to London Heathrow Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 25, 2025.
Use the filters below to find and compare flights from Seoul to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeoulLondon

GMP - LHR

GMPLHR

Seoul Gimpo Intl

Wed 9/10

2:25 pm-8:30 pm

1 stop14h 05m

London Heathrow

Wed 9/17

8:25 pm-1:05 pm

1 stop32h 40m

$714

SeoulLondon

GMP - LHR

GMPLHR

Seoul Gimpo Intl

Tue 12/23

1:45 pm-5:55 pm

1 stop37h 10m

London Heathrow

Sat 1/3

9:30 pm-12:25 pm

1 stop29h 55m

$718

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Mon 9/15

11:45 pm-2:35 pm

2 stops22h 50m

London Heathrow

Sat 9/20

3:35 pm-6:15 pm

2 stops42h 40m

$736

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Tue 1/20

1:05 pm-8:05 am

2 stops28h 00m

London Heathrow

Sat 2/7

11:30 am-10:50 am

1 stop14h 20m

$737

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Thu 1/29

1:05 pm-8:05 am

2 stops28h 00m

London Heathrow

Sat 1/31

8:45 am-11:15 am

1 stop17h 30m

$738

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Mon 9/15

11:45 pm-4:00 pm

1 stop24h 15m

London Heathrow

Wed 8/19

5:00 pm-6:15 pm

1 stop17h 15m

$745

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Mon 1/26

11:00 pm-8:40 pm

1 stop30h 40m

London Heathrow

Wed 2/11

4:15 pm-12:25 pm

1 stop35h 10m

$747

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Mon 1/26

11:00 pm-8:40 pm

1 stop30h 40m

London Heathrow

Wed 2/11

6:10 pm-12:25 pm

1 stop33h 15m

$750

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Sat 9/20

11:45 pm-9:20 am

1 stop17h 35m

London Heathrow

Thu 10/16

10:00 pm-12:55 pm

1 stop30h 55m

$752

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Sat 9/20

11:45 pm-9:20 am

1 stop17h 35m

London Heathrow

Mon 10/13

10:00 pm-8:45 pm

2 stops38h 45m

$759

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Seoul to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seoul and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

The month of March is, on average, the cheapest month to fly to London Heathrow Airport from Seoul, with most prices found around $698. If you’re not able to fly to London Heathrow Airport in March, then November is your next best option. Flight prices from Seoul to London Heathrow Airport during November average around $736.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Monday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $985. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $1,103.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Seoul to London Heathrow Airport in the evening for as low as $977. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $1,069.

What is the cheapest Seoul to London Heathrow flight route?

Fly from Incheon Intl to London Heathrow for the best Seoul - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Seoul when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $857 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Seoul for as low as $735 on momondo.

What cabin class options are available on Seoul to London Heathrow flights?

There are 2 cabin classes available to choose from on Seoul to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Seoul to London Heathrow Airport flight prices changed over time?

As of August 2025, prices for Seoul to London Heathrow Airport flights are approximately 13% cheaper when compared to flights at the same time last year.

When to book flights from Seoul to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seoul to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seoul to London Heathrow Airport (SEL to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seoul to London Heathrow Airport

Best Price Found

$635

Fastest flight time

14h 25m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Seoul in the past 72 hours is $635. The best round-trip flight deal from Seoul to London Heathrow Airport found on momondo in the last 72 hours is $1,074.
The fastest flight from Seoul to London Heathrow Airport takes 14h 25m
Direct flights go from Seoul to London Heathrow Airport every day.
Search flight deals

  • How far is Seoul to London Heathrow by plane?

    A flight from Seoul to London Heathrow will travel around 5512.0 mi. In terms of flight time, this usually takes a little over 14h 05m.

  • When did momondo last update prices for flights from Seoul to London Heathrow Airport?

    Prices for flights from Seoul to London Heathrow Airport were last updated today.

  • How many operators does momondo search for flights from Seoul to London Heathrow Airport?

  • How old do you have to be to fly from Seoul to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seoul to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Seoul to London Heathrow Airport?

  • What is the most popular airline from Seoul to London Heathrow Airport?

Best airlines flying from Seoul to London Heathrow Airport

Compare and see reviews for airlines that fly from Seoul to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
Air ChinaPriceFrom $552Free CancellationRating
7.3
95 reviews
Search Air China flights
Etihad AirwaysPriceFrom $672Free CancellationRating
7.4
1,233 reviews
Search Etihad Airways flights
LufthansaPriceFrom $734Free CancellationRating
6.8
7,359 reviews
Search Lufthansa flights
Asiana AirlinesPriceFrom $822Free CancellationRating
8.2
477 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $847Free CancellationRating
8.4
1,133 reviews
Search Korean Air flights

  • Korean Air Flights From Seoul to London Heathrow Airport

    The lowest priced Korean Air flight from Seoul to London Heathrow Airport from the last 72 hours was $847. Generally, Korean Air has 7 flights on this route every week with an average price of $1,103. Korean Air is rated 8.4/10 by our users.

  • Asiana Airlines Flights From Seoul to London Heathrow Airport

    The best Asiana Airlines deal for Seoul to London Heathrow Airport flight tickets found on momondo in the last 72 hours was $822, round-trip. It should be noted that an average Asiana Airlines flight deal for this route in this time was higher, at $981 round-trip. Asiana Airlines operates 7 flights out of Seoul into London Heathrow Airport in an average week, so prices vary by time and availability. 477 Asiana Airlines reviews by users on momondo have scored the airline at 8.2/10.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Luton
Dover
Slough
Milton Keynes
Guildford
Dartford
Crawley
Stansted
Hayes
Chelmsford
Salisbury
Brentwood
Ilford
Folkestone
Swindon
Colchester
Stratford-upon-Avon
Watford

Why use momondo?

Why should I use momondo to find a flight deal from Seoul to London?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Seoul.

Can I find flights from Seoul to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seoul to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Seoul to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seoul to London.

I’m not ready to book a flight from Seoul to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seoul to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

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