Cheap flights from London Heathrow Airport to Istanbul from $125

In general, November is the cheapest month to fly from London Heathrow Airport to Istanbul Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $245. If you don’t want to visit Istanbul Airport in November, then you should wait until January to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $251.

Our data shows that Thursday is the least expensive day to fly to Istanbul Airport. Tickets to fly out on this day can be as low as $495. On the other hand, Tuesday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $718.

At noon is the cheapest time of day to fly from London Heathrow Airport to Istanbul Airport when you can find flight prices for as low as $218. Flying to Istanbul Airport at noon is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive with an average ticket price of $701.

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

You are more likely to see cheaper flights to Istanbul Airport from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Istanbul Airport for around $314 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Istanbul Airport from London Heathrow Airport for as low as $263 on momondo.

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

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

Turkish Airlines, British Airways and Lufthansa are the top three most popular airlines that fly to Istanbul Airport from London Heathrow Airport according to our data. Turkish Airlines is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Istanbul Airport. Keep in mind that there are 3 different airlines that fly to Istanbul Airport 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 125 minutes.

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

Tuesday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

As of June 2026, 26 flights take off from London Heathrow Airport and land in Istanbul Airport each day. The most common flight departure time for this route is 10:00PM, with 40% of daily flights taking off in the evening.

As of June 2026, there are 185 flights per week flying from London Heathrow Airport to Istanbul Airport. The most common day of the week flights depart is Tue, with 23% of flights taking off on this day.