Cheap flights from London Heathrow Airport to Istanbul from £85

The month of November is, on average, the cheapest month to fly to Istanbul from London Heathrow Airport, with most prices found around £182. If you aren’t able to travel to Istanbul 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 £188.

On average, the least expensive day to fly to Istanbul from London Heathrow Airport is on a Monday. momondo users have found tickets for Monday departures for as low as £525. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from London Heathrow Airport to Istanbul on a Saturday will generally be more expensive and average around £567. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Flying to Istanbul from London Heathrow Airport at midday is the least expensive time of day to depart. momondo users have found prices as low as £278 when looking at flights departing at midday. Flights to Istanbul are more costly in the afternoon, with an average ticket price of £570. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from London Heathrow to Istanbul for the best London Heathrow - Istanbul flight prices

You are more likely to see cheaper flights to Istanbul from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Istanbul for around £231 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Istanbul from London Heathrow Airport for as low as £197 on momondo.

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

KLM, Air Serbia, and Air France are the most popular carriers operating from London Heathrow to Istanbul

Turkish Airlines, British Airways and LOT are the top three most popular airlines that fly to Istanbul from London Heathrow Airport according to our data. Turkish Airlines is the first choice among our users, with 54% of people opting to fly with this airline when travelling to Istanbul. Keep in mind that there are 13 different airlines that fly to Istanbul on a routine basis, so you have a few additional options to choose from.

Historically, on average around 9% of flights between London and Istanbul have experienced a delay on any given week. The average delay length over the past 12 months has been 124 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights departing in the early afternoon 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, Turkish Airlines have had the fewest delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

As of March 2026, 25 flights take off from London Heathrow Airport and land in Istanbul each day. The most common flight departure time for this route is 22:00, with 40% of daily flights taking off in the afternoon.

179 flights are operational weekly from London Heathrow Airport to Istanbul as of March 2026. The most popular departure day for this route is Tue, with 23% of flights per week taking off on this day.