Cheap flights from London to Seoul from £257

The cheapest month to fly to Incheon Intl Airport from London is in November. Flight prices, which tend to average around £395, are often lower during this time because this is during the off-season. If you aren’t able to travel to Incheon Intl Airport during the month of November, then flying in January is also cheap. Prices for this month can be found on momondo for an average of £437.

Our data shows that Tuesday is the least expensive day to fly to Incheon Intl Airport. Tickets to fly out on this day can be as low as £876. The most expensive day to fly to Incheon Intl Airport is Saturday, with ticket prices averaging around £1,041.

Our most recent data shows that the best time of day to fly to Incheon Intl Airport is at midday. Flights from London to Incheon Intl Airport during this time can be as low as £638. In contrast, the most expensive time of day to depart to Incheon Intl Airport is in the evening when prices are around £950.

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

You are more likely to see cheaper flights to Incheon Intl Airport from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around £686 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from London for as low as £621 on momondo.

There are 4 cabin classes available to choose from on London to Incheon Intl 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 13% on your flight if you consider stops on a London to Incheon Intl Airport flight.

As of March 2026, prices for London to Incheon Intl Airport flights are approximately 10% cheaper when compared to flights at the same time last year.

China Eastern, SWISS, and Korean Air are the most popular carriers operating from London to Incheon Intl

Asiana Airlines, Lufthansa and Korean Air are the top three most popular airlines that fly to Incheon Intl Airport from London according to our data. Asiana Airlines is the first choice among our users, with 35% of people opting to fly with this airline when travelling to Incheon Intl Airport. Keep in mind that there are 15 different airlines that fly to Incheon Intl Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 13% of flights between London and Incheon have experienced a delay on any given week. The average delay length over the past 12 months has been 113 minutes.

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

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

According to our data, Asiana Airlines have had the fewest delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

Beijing (PEK) was the most common stop: 26% of momondo users choosing one-stop flights on this route connected there.

Flights via Shanghai (PVG) offer the lowest average return price of £359.

Flights connecting via Copenhagen (CPH) have the shortest average one-way travel time: 14h 45m.

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

3 flights are operational daily from London to Incheon Intl Airport as of March 2026. The most popular departure time for this route is 18:00, with 100% of flights per day taking off in the evening.

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