Cheapest return flights from Ontario to London in June from 950€

AirHint found the following cheapest return flights from Ontario (ONT) to London (LHR) in June 2026 (see full year).

Return flights

10 Jun - 19 Jun KLM
10 Jun - 20 Jun KLM
08 Jun - 15 Jun KLM
01 Jun - 31 Jul jetBlue
03 Jun - 12 Jun Alaska Airlines
07 Jun - 13 Jun Alaska Airlines
12 Jun - 03 Jul Iberia
01 Jun - 27 Jun KLM
28 Jun - 14 Jul KLM
01 Jun - 17 Jun Alaska Airlines
04 Jun - 14 Jun KLM
02 Jun - 16 Jun Alaska Airlines
03 Jun - 10 Jun Alaska Airlines
21 Jun - 06 Jul KLM
09 Jun - 07 Jul Alaska Airlines
19 Jun - 06 Jul jetBlue

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

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.