AirHint found the following cheapest return flights from London (LHR) to Calgary (YYC) in September 2026 (see full year).

Return flights

24 Sep - 14 Oct	Aer Lingus
09 Sep - 21 Sep	KLM
07 Sep - 19 Sep	KLM
12 Sep - 22 Sep	KLM
08 Sep - 14 Sep	KLM
13 Sep - 24 Sep	KLM
01 Sep - 08 Sep	KLM
07 Sep - 21 Sep	KLM
05 Sep - 12 Sep	KLM
07 Sep - 16 Sep	KLM
12 Sep - 19 Sep	KLM
27 Sep - 03 Oct	KLM
27 Sep - 01 Oct	KLM
27 Sep - 02 Oct	KLM
30 Sep - 05 Oct	KLM
29 Sep - 04 Oct	KLM
29 Sep - 09 Oct	KLM
28 Sep - 10 Oct	KLM
24 Sep - 06 Oct	Aer Lingus
30 Sep - 06 Oct	KLM

Also check the deals for one-way flights from London to Calgary in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Calgary

Cheap car rent in Calgary

Cheapest return flights from London to Calgary in September from 579€

Return flights