Cheap flights from London Heathrow Airport to Istanbul from $178

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 $341. 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 $353.

According to our data, Sunday is the cheapest day to fly to Istanbul Airport from London Heathrow Airport. The lowest ticket price found for a Sunday departure recently was $1,244. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Istanbul Airport on Monday is $1,696.

At midday 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 $440. Flying to Istanbul Airport at midday is an ideal time because this is during off-peak travel hours. Flights to Istanbul Airport are more costly in the evening, with an average ticket price of $1,737. Departure times in the evening 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 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 $435 when searching weeks before you fly. 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 $371 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.

You could potentially save up to 23% on your flight if you consider stops on a London Heathrow Airport to Istanbul Airport flight.

As of March 2026, prices for London Heathrow Airport to Istanbul Airport flights are approximately 20% more expensive when compared to flights at the same time last year.

Historically, on average around 10% 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 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.

The number of flights available between London Heathrow Airport and Istanbul Airport is 32 per day as of March 2026. The most frequent departure time is 22:00, with 40% of daily flights leaving in the afternoon.

The number of flights available between London Heathrow Airport and Istanbul Airport is 229 per week as of March 2026. The most frequent departure day is Wed, with 18% of weekly flights leaving on this day.