AirHint found the following cheapest return flights from Montreal (YUL) to Liberia (LIR) in September 2026 (see full year).

Return flights

10 Sep - 17 Sep	United
05 Sep - 12 Sep	United
19 Sep - 26 Sep	United
01 Sep - 08 Sep	United
09 Sep - 16 Sep	United
27 Sep - 04 Oct	Air Transat	direct
04 Sep - 11 Sep	United
11 Sep - 18 Sep	United
18 Sep - 25 Sep	United
06 Sep - 13 Sep	Air Transat	direct
13 Sep - 20 Sep	Air Transat	direct
28 Sep - 05 Oct	United
25 Sep - 02 Oct	United
29 Sep - 06 Oct	United
30 Sep - 07 Oct	United
26 Sep - 03 Oct	United
24 Sep - 01 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 433€

Return flights