Cheap flights from London Heathrow Airport to Istanbul from $121

In general, November is the cheapest month to fly from London Heathrow Airport to Istanbul. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $254. 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 $254.

The cheapest day to depart from London Heathrow Airport to Istanbul is on a Thursday when prices can be found for as low as $479. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to Istanbul on Tuesday is $722.

Our most recent data shows that the best time of day to fly to Istanbul is at noon. Flights from London Heathrow Airport to Istanbul during this time can be as low as $238. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $696 on average. Flights to Istanbul from London Heathrow Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from London Heathrow to Istanbul Sabiha Gokcen 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 $330 when searching weeks out. 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 $304 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to Istanbul 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 Serbia 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 from London Heathrow Airport according to our data. Turkish Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Istanbul. Keep in mind that there are 3 different airlines that fly to Istanbul on a routine basis, so you have a few additional options to choose from.

Historically, on average around 8% 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 123 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 8% of their flights experiencing any sort of delay.

As of October 2026, there are 27 flights per day flying from London Heathrow Airport to Istanbul. The most common time of day flights depart is 6:00PM, with 39% of flights taking off in the evening.

As of October 2026, there are 195 flights per week flying from London Heathrow Airport to Istanbul. The most common day of the week flights depart is Wed, with 21% of flights taking off on this day.