Cheap flights from Incheon Intl Airport to London from $247

The month of November is, on average, the cheapest month to fly to London Heathrow Airport from Incheon Intl Airport, with most prices found around $677. If you’re not able to fly to London Heathrow Airport in November, then March is your next best option. Flight prices from Incheon Intl Airport to London Heathrow Airport during March average around $752.

Our data shows that Saturday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $776. The most expensive day to fly to London Heathrow Airport is Sunday, with ticket prices averaging around $1,134.

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

You are more likely to see cheaper flights to London Heathrow Airport from Incheon Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $909 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 Incheon Intl Airport for as low as $715 on momondo.

There are 3 cabin classes available to choose from on Incheon Intl Airport to London Heathrow Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

As of April 2026, prices for Incheon Intl Airport to London Heathrow Airport flights are approximately 25% cheaper when compared to flights at the same time last year.

Etihad Airways and Qatar Airways are the most popular carriers operating from Incheon Intl to London Heathrow

Asiana Airlines, Lufthansa and Korean Air are the top three most popular airlines that fly to London Heathrow Airport from Incheon Intl Airport according to our data. Asiana Airlines is the first choice among our users, with 52% 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 30% of flights between Incheon and London have experienced a delay on any given week. The average delay length over the past 12 months has been 93 minutes.

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

Thursday is statistically the day of the week which experiences the fewest number of delays on this flight route. Monday has historically seen more delays on average compared to the rest of the week.

According to our data, Korean Air have had the least number of delays on this route over the last 12 months; with about 22% of their flights experiencing any sort of delay.

Beijing (PEK) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Amsterdam (AMS) offer the lowest average round-trip price of $1,002.

Flights connecting via Beijing (PEK) have the shortest average one-way travel time: 15h 33m.

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 25m.

As of April 2026, there are 5 flights per day flying from Incheon Intl Airport to London Heathrow Airport. The most common time of day flights depart is 10:00AM, with 60% of flights taking off at noon.

As of April 2026, 35 flights take off from Incheon Intl Airport and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.