Cheap flights from Seoul to London from £139

The cheapest month to fly to London from Seoul is in June. Flight prices, which tend to average around £472, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Seoul averaging around £507.

Our data shows that Friday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £491. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Seoul to London for around £735.

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

You are more likely to see cheaper flights to London from Seoul when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £659 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Seoul for as low as £583 on momondo.

There are 4 cabin classes available to choose from on Seoul to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 20% on your flight if you consider stops on a Seoul to London flight.

China Eastern, China Southern, and Shenzhen Airlines are the most popular carriers operating from Seoul to London

Asiana Airlines, Air China and Korean Air are the top three most popular airlines that fly to London from Seoul according to our data. Asiana Airlines is the first choice among our users, with 56% of people opting to fly with this airline when travelling to London. Keep in mind that there are 4 different airlines that fly to London 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 departing in the morning have, in the past, seen delays more frequently in comparison.

Beijing (PEK) was the most common stop: 19% of momondo users choosing one-stop flights on this route connected there.

Flights via Guangzhou (CAN) offer the lowest average return price of £349.

Flights connecting via Beijing (PEK) have the shortest average one-way travel time: 15h 25m.

Warsaw (WAW) has the shortest average stopover time for this route: 1h 45m.

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

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