AirHint found the following cheapest return flights from Ottawa (YOW) to London (LHR) in June 2025 (see full year).

Return flights

14 Jun - 18 Jun	WestJet
23 Jun - 29 Jun	WestJet
17 Jun - 08 Jul	WestJet
17 Jun - 23 Jun	WestJet
18 Jun - 23 Jun	Air Canada
23 Jun - 02 Jul	Air Canada
16 Jun - 23 Jun	Air Canada
18 Jun - 25 Jun	Air Canada
18 Jun - 26 Jun	Air Canada
19 Jun - 02 Jul	Air Canada
19 Jun - 10 Jul	Air Canada
12 Jun - 22 Jun	Air Canada
15 Jun - 22 Jun	Air Canada
19 Jun - 23 Jun	Air Canada
19 Jun - 02 Jul	Lufthansa	direct
25 Jun - 21 Jul	WestJet
28 Jun - 02 Jul	Aer Lingus
29 Jun - 03 Jul	Air France
27 Jun - 04 Jul	Air Canada
24 Jun - 20 Jul	Lufthansa

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

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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Cheapest return flights from Ottawa to London in June from $698

Return flights