AirHint found the following cheapest return flights from Halifax (YHZ) to Lisbon (LIS) in September 2025 (see full year).

Return flights

10 Sep - 17 Sep	WestJet
03 Sep - 17 Sep	WestJet
21 Sep - 01 Oct	WestJet
17 Sep - 24 Sep	WestJet
09 Sep - 16 Sep	Air Transat
23 Sep - 07 Oct	Air Transat
28 Sep - 07 Oct	Air Transat
24 Sep - 08 Oct	Air Transat
30 Sep - 21 Oct	Air Transat
16 Sep - 26 Sep	WestJet
09 Sep - 23 Sep	Air Transat
02 Sep - 23 Sep	Air Transat
23 Sep - 24 Sep	WestJet
15 Sep - 22 Sep	WestJet
12 Sep - 22 Sep	WestJet
23 Sep - 03 Oct	WestJet

Also check the deals for one-way flights from Halifax to Lisbon 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 Halifax to Lisbon in September from $491

Return flights