Cheapest one-way flights from Ottawa to London in April from $356

AirHint found the following cheapest one-way flights from Ottawa (YOW) to London (LHR) in April 2026 (see full year).

One-Way flights

18 Apr WestJet
23 Apr WestJet
09 Apr WestJet
04 Apr WestJet
02 Apr WestJet
18 Apr Aegean Airlines direct
23 Apr Air Canada direct
09 Apr Air Canada direct
02 Apr Air Canada direct
04 Apr Air Canada direct

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

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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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