Cheap flights from Istanbul Airport to London from $79

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Istanbul Airport, with most prices found around $260. If you’re not able to fly to London Heathrow Airport in February, then January is your next best option. Flight prices from Istanbul Airport to London Heathrow Airport during January average around $275.

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $653. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $775.

According to our data, the cheapest time of day to fly to London Heathrow Airport is at noon. momondo users have found flights departing from Istanbul Airport to London Heathrow Airport at noon for as low as $540. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $714.

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

You are more likely to see cheaper flights to London Heathrow Airport from Istanbul Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $307 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Istanbul Airport for as low as $222 on momondo.

Historically, on average around 15% of flights between Istanbul and London have experienced a delay on any given week. The average delay length over the past 12 months has been 105 minutes.

Generally, flights departing in the evening 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. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, British Airways have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

Athens (ATH) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Athens (ATH) offer the lowest average round-trip price of $190.

Flights connecting via Athens (ATH) have the shortest average one-way travel time: 7h 25m.

Athens (ATH) has the shortest average layover time for this route: 2h 08m.

28 flights are operational daily from Istanbul Airport to London Heathrow Airport as of May 2026. The most popular departure time for this route is 2:00PM, with 46% of flights per day taking off in the afternoon.

199 flights are operational weekly from Istanbul Airport to London Heathrow Airport as of May 2026. The most popular departure day for this route is Sun, with 21% of flights per week taking off on this day.