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

Return flights

08 Sep - 12 Sep	United
05 Sep - 12 Sep	United
09 Sep - 16 Sep	United
11 Sep - 18 Sep	United
15 Sep - 22 Sep	United
04 Sep - 11 Sep	United
06 Sep - 13 Sep	United
08 Sep - 15 Sep	United
12 Sep - 19 Sep	United
16 Sep - 23 Sep	United
24 Sep - 01 Oct	WestJet
28 Sep - 05 Oct	Air Transat	direct
27 Sep - 04 Oct	WestJet
25 Sep - 02 Oct	United
26 Sep - 03 Oct	United
29 Sep - 06 Oct	United
18 Sep - 19 Oct	United
30 Sep - 07 Oct	United

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 338€

Return flights