Cheapest one-way flights from Ottawa to London in September from $608

Best time to book flights for Ottawa (YOW) to London (LHR) flights at AirHint

AirHint found the following cheapest one-way flights from Ottawa (YOW) to London (LHR) in September 2025 (see full year).

One-Way flights

27 Sep WestJet
27 Sep Air Canada direct

Also check the deals for return flights from Ottawa to London in September.

Skyscanner

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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