Cheapest one-way flights from Ottawa to London in September from 356€
AirHint found the following cheapest one-way flights from Ottawa (YOW) to London (LHR) in September 2025 (see full year).
One-Way flights
| 27 Sep | Porter Airlines (Canada) Ltd | ||
| 30 Sep | Porter Airlines (Canada) Ltd | ||
| 20 Sep | WestJet | ||
| 06 Sep | WestJet | ||
| 24 Sep | WestJet | ||
| 24 Sep | Air Canada | direct | |
| 20 Sep | Air Canada | direct | |
| 06 Sep | Air Canada | direct |
Also check the deals for return flights from Ottawa to London in September.
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.
