Cheapest return flights from Ottawa to London in May from $685

AirHint found the following cheapest return flights from Ottawa (YOW) to London (LHR) in May 2026 (see full year).

Return flights

17 May - 06 Jun Air Canada
07 May - 18 May Lufthansa direct
13 May - 23 May Air Canada
18 May - 13 Jun Air Canada
06 May - 24 May Air France
05 May - 23 May Air Canada
11 May - 22 May Air Canada
18 May - 13 Jun Lufthansa direct
06 May - 23 May Delta
01 May - 01 May Air Canada

Also check the deals for one-way flights from Ottawa to London in May.

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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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