Cheap flights from London Heathrow Airport to Istanbul from $123

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 $242. 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 $250.

The cheapest day to depart from London Heathrow Airport to Istanbul is on a Friday when prices can be found for as low as $434. 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 $694.

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 $274. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $624 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 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 $308 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 $263 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.

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 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 March 2026, there are 25 flights per day flying from London Heathrow Airport to Istanbul. The most common time of day flights depart is 10:00PM, with 40% of flights taking off in the afternoon.

As of March 2026, there are 179 flights per week flying from London Heathrow Airport to Istanbul. The most common day of the week flights depart is Tue, with 23% of flights taking off on this day.