Cheap flights from Seoul to London from $191

The month of November is, on average, the cheapest month to fly to London Heathrow Airport from Seoul, with most prices found around $706. If you’re not able to fly to London Heathrow Airport in November, then March is your next best option. Flight prices from Seoul to London Heathrow Airport during March average around $733.

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $875. The most expensive day to fly to London Heathrow Airport is Sunday, with ticket prices averaging around $1,105.

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

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 $895 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 $750 on momondo.

There are 3 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.

As of February 2026, prices for Seoul to London Heathrow Airport flights are approximately 38% more expensive when compared to flights at the same time last year.

China Eastern, China Southern, and Air China are the most popular carriers operating from Seoul to London Heathrow

Asiana Airlines, Korean Air and Lufthansa are the top three most popular airlines that fly to London Heathrow Airport from Seoul according to our data. Asiana Airlines is the first choice among our users, with 54% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 4 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 0% of flights between Seoul and London have experienced a delay on any given week. The average delay length over the past 12 months has been 0 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

Beijing (PEK) was the most common stop: 36% of momondo users choosing 1-stop flights on this route connected there.

Flights via Shanghai (PVG) offer the lowest average round-trip price of $512.

Flights connecting via Beijing (PEK) have the shortest average one-way travel time: 14h 03m.

Abu Dhabi (AUH) has the shortest average layover time for this route: 1h 15m.

As of February 2026, there are 3 flights per day flying from Seoul to London Heathrow Airport. The most common time of day flights depart is 10:00AM, with 66% of flights taking off at noon.

The number of flights available between Seoul and London Heathrow Airport is 21 per week as of February 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.