Heathrow → Istanbul flight delays
HEATHROW → ISTANBUL · all airlines · 6,622 flights · May 2025 – April 2026 · source: UK CAA
This route is delayed
21%of the time, by +42 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
79%
Delayed 3h+
0.1%
Cancelled
0.2%
Avg when late
+42m
Were you delayed 3+ hours on this route?
About 0.1% of these flights land 3h+ late. If yours did, under UK261 you could be owed up to £520 — and you can claim it yourself for free. Check if you're owed →
When does HEATHROW → ISTANBUL run late?
28
12
6
16
20
20
35
23
36
29
10
21
J
F
M
A
M
J
J
A
S
O
N
D
Delays peak in September (36% late).
Which airline is most punctual on HEATHROW → ISTANBUL?
British Airways Plcdelayed 18%
Thy Turkish Airlinesdelayed 23%
Frequently asked
How often is the Heathrow to Istanbul flight delayed?
About 21% of HEATHROW → ISTANBUL flights arrive late (15+ minutes), by an average of 42 minutes when they do, based on 6,622 flights in May 2025 – April 2026.
Which airline is most punctual on HEATHROW → ISTANBUL?
British Airways Plc, delayed 18% of the time — the best of the 2 airlines flying this route.
What is the worst month for delays on HEATHROW → ISTANBUL?
September is the worst, with 36% of flights delayed, while March is the most reliable at 6%.
Airport overviews