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Heathrow

$336+ Cheap flights from Seoul (SEL) to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEL — LHR
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Seoul to London Heathrow are usually found in December or March, booked 67 days in advance, depart on a Saturday or Monday and return on a Wednesday

Cheap flight deals from Seoul to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Seoul (SEL) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 15, 2025.

Round-trip from

$609
(China Southern)

One-way from

$336
(Kiwi.com)

Popular in

October

Cheapest in

December

Average price

$1,009

Good round-trip deal

$689 or less

Good one-way deal

$683 or less
From Seoul (SEL) to London Heathrow
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One-way flight from Seoul (SEL) to London Heathrow
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Highest demand for flights based on searches. 8% potential increase in price ($87 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Seoul (SEL) to London Heathrow.
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Price to beat on a one-way flight from Seoul (SEL) to London Heathrow.
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Find flight deals from Seoul to Heathrow

Cheapest flights from Seoul to Heathrow
Explore the most affordable flight options available from Seoul to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This China Southern deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Southern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/31:45 pmGMP - LHR
1 stop37h 10mChina Southern
Sun 11/169:30 pmLHR - GMP
1 stop29h 55mChina Southern
Deal found 9/15$609
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:45 pmICN - LHR
1 stop25h 15mScandinavian Airlines
Thu 1/1510:35 amLHR - ICN
2 stops23h 25mScandinavian Airlines
Deal found 9/15$697
This Scandinavian Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2511:45 pmICN - LHR
1 stop25h 15mScandinavian Airlines
Wed 11/57:50 pmLHR - ICN
2 stops38h 10mScandinavian Airlines
Deal found 9/14$700
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2211:45 pmICN - LHR
2 stops22h 50mScandinavian Airlines
Mon 10/277:50 pmLHR - ICN
2 stops38h 10mScandinavian Airlines
Deal found 9/15$701
This Scandinavian Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2611:45 pmICN - LHR
2 stops22h 10mScandinavian Airlines
Sun 11/306:40 pmLHR - ICN
1 stop15h 20mScandinavian Airlines
Deal found 9/14$702
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2211:45 pmICN - LHR
2 stops21h 10mScandinavian Airlines
Sat 11/13:35 pmLHR - ICN
2 stops42h 25mScandinavian Airlines
Deal found 9/15$705
This Lufthansa deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/291:30 pmICN - LHR
1 stop16h 30mLufthansa
Mon 1/57:40 amLHR - ICN
2 stops18h 10mLufthansa
Deal found 9/14$708
This SmartFares deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/22:50 pmICN - LHR
1 stop34h 05mAir China
Thu 11/135:40 pmLHR - ICN
1 stop13h 55mAir China
Deal found 9/15$714
This Lufthansa deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:05 pmICN - LHR
1 stop16h 45mLufthansa
Tue 12/307:40 amLHR - ICN
2 stops18h 10mLufthansa
Deal found 9/15$717
This Lufthansa deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/141:05 pmICN - LHR
2 stops28h 00mLufthansa
Sun 11/2311:10 amLHR - ICN
1 stop15h 05mLufthansa
Deal found 9/15$720
This Lufthansa deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/161:05 pmICN - LHR
2 stops28h 00mLufthansa
Fri 1/1611:10 amLHR - ICN
1 stop15h 05mLufthansa
Deal found 9/15$722
This Priceline deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/22:25 pmGMP - LHR
1 stop34h 30mAir China
Thu 11/138:25 pmLHR - GMP
1 stop31h 40mAir China
Deal found 9/15$734

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seoul to Heathrow 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, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Seoul to London Heathrow Airport that are best for you.

Fly from

Seoul

Fly to

Heathrow

Route

Depart

Return

Price

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Wed 11/26

11:45 pm-12:55 pm

2 stops22h 10m

London Heathrow

Sun 11/30

6:40 pm-7:00 pm

1 stop15h 20m

$702

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Wed 1/14

1:05 pm-8:05 am

2 stops28h 00m

London Heathrow

Fri 1/30

8:45 am-11:15 am

1 stop17h 30m

$714

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Mon 10/20

11:45 pm-2:35 pm

2 stops22h 50m

London Heathrow

Sat 10/25

3:35 pm-7:00 pm

2 stops43h 25m

$735

SeoulLondon

GMP - LHR

GMPLHR

Seoul Gimpo Intl

Mon 3/2

1:45 pm-5:55 pm

1 stop37h 10m

London Heathrow

Wed 3/18

9:30 pm-12:25 pm

1 stop29h 55m

$743

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Sat 12/20

9:30 pm-5:40 pm

2 stops29h 10m

London Heathrow

Wed 12/31

6:05 pm-7:00 pm

2 stops39h 55m

$762

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Wed 1/14

12:10 am-3:25 pm

1 stop24h 15m

London Heathrow

Thu 1/22

10:25 am-8:55 pm

1 stop25h 30m

$776

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Mon 3/2

1:05 pm-8:05 am

2 stops28h 00m

London Heathrow

Wed 3/18

7:40 am-10:50 am

2 stops18h 10m

$817

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Thu 1/15

12:25 pm-6:05 pm

Nonstop14h 40m

London Heathrow

Thu 1/22

8:10 pm-5:45 pm

Nonstop12h 35m

$822

IncheonLondon

ICN - LHR

ICNLHR

Incheon Intl

Mon 10/13

11:45 pm-2:35 pm

2 stops22h 50m

London Heathrow

Mon 10/20

7:50 pm-6:15 pm

2 stops38h 25m

$833

SeoulLondon

GMP - LHR

GMPLHR

Seoul Gimpo Intl

Sun 11/2

1:45 pm-5:55 pm

1 stop37h 10m

London Heathrow

Sun 11/16

9:30 pm-12:25 pm

1 stop29h 55m

$841

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 45 results
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Best time to book a flight from Seoul to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Seoul with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seoul to London Heathrow Airport

How far ahead should I book a flight from Seoul to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seoul to Heathrow. Price data was last updated on September 12, 2025.

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.

What is the cheapest month to book a flight from Seoul to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Seoul to London Heathrow Airport (average of $661). Flying from Seoul to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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.

What is the cheapest time of day to fly from SEL to LHR?

Find hourly flight availability from Seoul to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

It’s typically best to fly out from Seoul to London Heathrow Airport in the afternoon. Doing so could potentially save you 10% on the flight price compared to flying at noon, which is usually more expensive.

Weekly flight availability from Seoul to London Heathrow Airport

Explore weekly flight availability from Seoul to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 15, 2025.

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).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated September 15, 2025.
See what other customers who have flown with Korean Air, Asiana Airlines, and Etihad Airways from Seoul to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Korean Air
8.4
Very good
1,139 reviews
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Asiana Airlines
8.2
Very good
479 reviews
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Etihad Airways
7.4
Good
1,250 reviews
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Air China
7.2
Good
99 reviews
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Lufthansa
6.8
Okay
7,407 reviews
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Related info for your journey

Find useful and relevant information for your journey from Seoul to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seoul to London Heathrow Airport?

    Departing from Seoul to London Heathrow Airport will take you 22h 10m. The distance from Seoul to London Heathrow Airport is about 5503 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Seoul to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from Seoul to London Heathrow Airport round-trip from $580. Other airlines that can offer you cheap pricing are Asiana Airlines, from $630, and Etihad Airways, from $672. You may be able to fly from Seoul to London Heathrow Airport for 36% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Seoul to London Heathrow Airport one-way?

    The cheapest airlines for a one-way flight from Seoul to London Heathrow Airport are Vietnam Airlines ($371), Etihad Airways ($380), and SWISS ($415).

  • What are the most reliable airlines from Seoul to London Heathrow Airport?

    Consider Virgin Atlantic (82%), Korean Air (77%) or Asiana Airlines (55%) when booking your flight. These represent the most reliable airlines when flying from Seoul to London Heathrow Airport.

  • What are the cheapest flights from Seoul to London Heathrow Airport?

    While on average a flight from Seoul to London Heathrow Airport is generally $3,532, our data shows the cheapest flight currently is $628. When looking at the most popular route, (Incheon Intl - London Heathrow), you can expect to pay $583 for that flight.

  • Can I find deals for flights from Seoul to Heathrow that include hotel bookings?

    Yes. In addition to deals on Seoul to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seoul to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seoul to Heathrow.

  • Can I find deals for business class flights from Seoul to Heathrow?

    Yes. Cheapflights offers flight deals from Seoul to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seoul to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Seoul to London Heathrow Airport (average of $661). Flying from Seoul to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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.

See more FAQs

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone
Chichester

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seoul to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
Incheon Intl to Heathrow flights

Top 5 airlines flying from Seoul to Heathrow

Discover the top 5 airlines that operate flights from Seoul to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest$580Average$764FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$630Average$947FlexibilityNo cancel feeOn-time76%
Etihad AirwaysCheapest$672Average$806FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$734Average$1,132FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$847Average$1,103FlexibilityNo cancel feeOn-time81%

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