How often are flights between London and Istanbul on time?

78.8% of 6,531 flights were on time (within 15 minutes) over the last 12 months of UK Civil Aviation Authority figures, and 0.2% were cancelled.

Which airline is most punctual between London and Istanbul?

British Airways, with 82.3% on time. Turkish Airlines was the least punctual at 77.2%.

LHR to ISL

London to Istanbul flights

Name: London to Istanbul (LHR-ISL) flights: on-time record
Creator: TripStow
License: https://tripstow.com/notices

Flights from London Heathrow (LHR) to Istanbul (ISL) cover 2,513 km. 6,531 flights flew between them in the last 12 months of UK Civil Aviation Authority figures; 79% were on time across 2 airlines.

6,531

flights, August 2025 to July 2026

79%

on time (within 15 min)

0.2%

cancelled

+10 min

average delay

Both directions together. On time means within 15 minutes of schedule, counted over every scheduled flight to and from the UK airport, including cancelled ones (the CAA's definition).

Airlines on this route

Airline	Flights	On time	Cancelled	Average delay
Turkish Airlines	4,486	77%	0.2%	10 min
British Airways	2,045	82%	0.1%	9 min

Month by month

Over the last 12 months, London and Istanbul ran best in March 2026 (93.8% on time) and worst in September 2025 (63.9%).

Share of flights on time, by month (UK Civil Aviation Authority). Green is the best month, orange the worst.

See the figures

Month	On time	Cancelled	Flights
August 2025	76%	0.4%	564
September 2025	64%	0%	538
October 2025	71%	0.4%	555
November 2025	90%	0%	556
December 2025	79%	0%	580
January 2026	72%	0.2%	567
February 2026	88%	0%	504
March 2026	94%	0.2%	549
April 2026	84%	0.2%	542
May 2026	82%	0.8%	527
June 2026	73%	0.2%	507
July 2026	74%	0%	542

Source: UK Civil Aviation Authority punctuality statistics, August 2025 to July 2026. Contains UK Civil Aviation Authority data. Figures describe the past and do not predict a future flight.

Questions and answers

How often are flights between London and Istanbul on time?: 78.8% of 6,531 flights were on time (within 15 minutes) over the last 12 months of UK Civil Aviation Authority figures, and 0.2% were cancelled.
Which airline is most punctual between London and Istanbul?: British Airways, with 82.3% on time. Turkish Airlines was the least punctual at 77.2%.
What is the best month to fly between London and Istanbul?: Over the last 12 months, London and Istanbul ran best in March 2026 (93.8% on time) and worst in September 2025 (63.9%).

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