AirHint found the following cheapest return flights from Montreal (YUL) to Athens (ATH) in May 2026 (see full year).

Return flights

05 May - 12 May	Air France
19 May - 26 May	Air France
10 May - 27 May	Delta
19 May - 27 May	Delta
06 May - 13 May	KLM
03 May - 15 May	KLM
17 May - 27 May	Delta
12 May - 22 May	Air France
13 May - 20 May	Air France
13 May - 29 May	Air France
25 May - 01 Jun	FrenchBee
25 May - 06 Jun	FrenchBee
19 May - 09 Jun	Air France
18 May - 10 Jun	Delta
27 May - 03 Jun	FrenchBee
29 May - 05 Jun	FrenchBee
24 May - 15 Jun	Delta
30 May - 13 Jun	FrenchBee
15 May - 07 Jun	Air Transat
24 May - 03 Jun	FrenchBee

Also check the deals for one-way flights from Montreal to Athens in May.

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 Athens in May from 511€

Return flights