Heathrow → Calgary flight delays
HEATHROW → CALGARY · all airlines · 1,477 flights · May 2025 – April 2026 · source: UK CAA
This route is delayed
26%of the time, by +56 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
74%
Delayed 3h+
0.5%
Cancelled
3.5%
Avg when late
+56m
Were you delayed 3+ hours on this route?
About 0.5% 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 → CALGARY run late?
40
23
23
23
14
22
20
30
29
18
24
42
J
F
M
A
M
J
J
A
S
O
N
D
Delays peak in December (42% late).
Which airline is most punctual on HEATHROW → CALGARY?
Air Canadadelayed 23%
West Jet Airlinesdelayed 29%
Frequently asked
How often is the Heathrow to Calgary flight delayed?
About 26% of HEATHROW → CALGARY flights arrive late (15+ minutes), by an average of 56 minutes when they do, based on 1,477 flights in May 2025 – April 2026.
Which airline is most punctual on HEATHROW → CALGARY?
Air Canada, delayed 23% of the time — the best of the 2 airlines flying this route.
What is the worst month for delays on HEATHROW → CALGARY?
December is the worst, with 42% of flights delayed, while May is the most reliable at 14%.
Airport overviews