Cheap flights from Seoul to London from £145

In general, November is the cheapest month to fly from Seoul to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £530. The month of December is another great option to travel to London Heathrow Airport, with average flight prices from Seoul averaging around £557.

On average, the least expensive day to fly to London Heathrow Airport from Seoul is on a Friday. momondo users have found tickets for Friday departures for as low as £506. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £699.

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 £671 when searching weeks before you fly. 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 £522 on momondo.

There are 4 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.

You could potentially save up to 1% on your flight if you consider stops on a Seoul to London Heathrow Airport flight.

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

Asiana Airlines, Air China and Korean Air 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 57% of people opting to fly with this airline when travelling 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 departing in the morning have, in the past, seen delays more frequently in comparison.

Shanghai (PVG) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

Flights via Helsinki (HEL) offer the lowest average return price of £654.

Flights connecting via Shanghai (PVG) have the shortest average one-way travel time: 17h 45m.

Helsinki (HEL) has the shortest average stopover time for this route: 2h 15m.

As of March 2026, there are 3 flights per day flying from Seoul to London Heathrow Airport. 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 Heathrow 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.