AirHint found the following cheapest return flights from Hamilton (YHM) to London (LHR) in October 2025 (see full year).

Return flights

10 Oct - 01 Nov	Porter Airlines (Canada) Ltd
08 Oct - 15 Oct	Porter Airlines (Canada) Ltd
07 Oct - 16 Oct	Porter Airlines (Canada) Ltd
27 Oct - 22 Nov	WestJet
21 Oct - 09 Nov	WestJet
14 Oct - 04 Nov	WestJet
20 Oct - 28 Oct	WestJet
17 Oct - 08 Nov	WestJet
27 Oct - 04 Nov	WestJet
23 Oct - 08 Nov	WestJet
21 Oct - 01 Nov	WestJet
23 Oct - 01 Nov	WestJet
21 Oct - 08 Nov	WestJet
20 Oct - 24 Oct	WestJet
17 Oct - 22 Oct	WestJet
23 Oct - 27 Oct	WestJet
17 Oct - 24 Oct	WestJet
08 Oct - 24 Oct	WestJet
14 Oct - 24 Oct	WestJet
05 Oct - 24 Oct	WestJet

Also check the deals for one-way flights from Hamilton to London in October.

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.

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Cheapest return flights from Hamilton to London in October from $796

Return flights