AirHint found the following cheapest return flights from Waterloo (YKF) to Lisbon (LIS) in May 2026 (see full year).

Return flights

02 May - 09 May	Flair Airlines
15 May - 23 May	WestJet
29 May - 11 Jun	WestJet
01 May - 05 May	WestJet
01 May - 09 May	WestJet
09 May - 23 May	WestJet
04 May - 13 May	WestJet
14 May - 30 May	WestJet
17 May - 06 Jun	WestJet
06 May - 20 May	WestJet
06 May - 23 May	WestJet
03 May - 07 May	WestJet
26 May - 02 Jun	WestJet
22 May - 06 Jun	WestJet
06 May - 03 Jun	WestJet
31 May - 10 Jun	WestJet

Also check the deals for one-way flights from Waterloo to Lisbon 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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Waterloo to Lisbon in May from $556

Return flights