Cheapest return flights from Ottawa to London in May from 478€

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

Return flights

22 May - 29 May Air Transat direct
15 May - 29 May Air Transat direct
29 May - 12 Jun Air Transat direct
08 May - 22 May Air Transat
30 May - 12 Jun Air Transat
13 May - 20 May WestJet
02 May - 16 May Air Transat
02 May - 04 May Air Transat
01 May - 15 May Air Transat
03 May - 23 May Air Transat
09 May - 23 May Air Transat
23 May - 30 May Air Transat

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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