Cheapest return YUL–SOF flights, May

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

Return flights

17 May - 15 Jun WestJet
17 May - 12 Jun WestJet
29 May - 05 Jun WestJet
12 May - 19 May Air Transat
31 May - 07 Jun Air Transat
28 May - 04 Jun Air Transat
11 May - 18 May FrenchBee
19 May - 26 May Air Transat
26 May - 02 Jun Air Transat
27 May - 03 Jun FrenchBee
18 May - 25 May Air Transat
25 May - 01 Jun FrenchBee
05 May - 12 May Air Transat
20 May - 27 May Air Transat
15 May - 22 May Air Transat
14 May - 21 May Air Transat
06 May - 13 May FrenchBee
22 May - 29 May Air Transat
30 May - 06 Jun Air Transat

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

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