AirHint found the following cheapest return flights from Waterloo (YKF) to London (LHR) in September 2025 (see full year).

Return flights

15 Sep - 11 Oct	Flair Airlines
29 Sep - 02 Oct	WestJet
29 Sep - 03 Oct	WestJet
29 Sep - 05 Oct	WestJet
29 Sep - 10 Oct	WestJet
15 Sep - 22 Sep	WestJet
29 Sep - 06 Oct	WestJet
29 Sep - 09 Oct	WestJet
30 Sep - 09 Oct	WestJet
30 Sep - 13 Oct	WestJet
15 Sep - 19 Sep	WestJet
15 Sep - 21 Sep	WestJet
15 Sep - 09 Oct	WestJet
15 Sep - 18 Sep	WestJet
25 Sep - 29 Sep	WestJet
27 Sep - 29 Sep	WestJet
15 Sep - 24 Sep	WestJet
16 Sep - 25 Sep	WestJet
16 Sep - 26 Sep	WestJet
19 Sep - 22 Sep	WestJet

Also check the deals for one-way flights from Waterloo 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.

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Cheapest return flights from Waterloo to London in September from $820

Return flights