Cheapest return flights from Ottawa to London in May from 451€

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

Return flights

20 May - 02 Jun WestJet
20 May - 08 Jun WestJet
23 May - 31 May Air Transat
28 May - 02 Jun Air Transat
31 May - 09 Jun WestJet
15 May - 29 May Air Transat direct
22 May - 29 May Air Transat direct
15 May - 24 May Air Transat direct
31 May - 09 Jun Air Transat direct
04 May - 11 May Porter Airlines (Canada) Ltd
26 May - 07 Jun Air Transat
22 May - 06 Jun Air Transat
07 May - 12 May Air Transat
21 May - 06 Jun Air Transat
15 May - 22 May Air Transat direct
14 May - 28 May Air Transat
06 May - 11 May Porter Airlines (Canada) Ltd
11 May - 18 May Porter Airlines (Canada) Ltd
22 May - 11 Jun Air Transat
22 May - 22 Jun Air France

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

Powered by

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.

Book a cheap hotel in London

Cheap car rent in London

Feel free to contact us with any feedback or request another flight research.