Heathrow → Philadelphia International flight delays
HEATHROW → PHILADELPHIA-INTERNATIONAL · all airlines · 1,914 flights · May 2025 – April 2026 · source: UK CAA
This route is delayed
21%of the time, by +66 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+
1.2%
Cancelled
3.1%
Avg when late
+66m
Were you delayed 3+ hours on this route?
About 1.2% 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 → PHILADELPHIA-INTERNATIONAL run late?
26
12
9
14
22
19
39
26
24
19
21
15
J
F
M
A
M
J
J
A
S
O
N
D
Delays peak in July (39% late).
Which airline is most punctual on HEATHROW → PHILADELPHIA-INTERNATIONAL?
British Airways Plcdelayed 19%
American Airlinesdelayed 22%
Frequently asked
How often is the Heathrow to Philadelphia International flight delayed?
About 21% of HEATHROW → PHILADELPHIA-INTERNATIONAL flights arrive late (15+ minutes), by an average of 66 minutes when they do, based on 1,914 flights in May 2025 – April 2026.
Which airline is most punctual on HEATHROW → PHILADELPHIA-INTERNATIONAL?
British Airways Plc, delayed 19% of the time — the best of the 2 airlines flying this route.
What is the worst month for delays on HEATHROW → PHILADELPHIA-INTERNATIONAL?
July is the worst, with 39% of flights delayed, while March is the most reliable at 9%.
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