AirHint found the following cheapest return flights from Montreal (YUL) to Liberia (LIR) in September 2025 (see full year).

Return flights

14 Sep - 28 Sep	Air Transat	direct
07 Sep - 14 Sep	Air Transat	direct
21 Sep - 28 Sep	Air Transat	direct
14 Sep - 21 Sep	Air Transat	direct
28 Sep - 05 Oct	Air Transat	direct
24 Sep - 01 Oct	WestJet
27 Sep - 04 Oct	WestJet
10 Sep - 17 Sep	WestJet
29 Sep - 06 Oct	United
10 Sep - 15 Sep	WestJet
26 Sep - 03 Oct	United
25 Sep - 02 Oct	United
13 Sep - 27 Sep	WestJet
08 Sep - 15 Sep	WestJet
13 Sep - 20 Sep	WestJet
15 Sep - 22 Sep	WestJet
21 Sep - 10 Oct	Delta

Also check the deals for one-way flights from Montreal to Liberia 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 Montreal to Liberia in September from $414

Return flights