Cheapest return flights from Seattle to Calgary in September from $130

AirHint found the following cheapest return flights from Seattle (SEA) to Calgary (YYC) in September 2025 (see full year).

Return flights

27 Sep - 02 Oct WestJet direct
27 Sep - 29 Sep WestJet direct
20 Sep - 29 Sep WestJet direct
18 Sep - 21 Sep WestJet
26 Sep - 29 Sep WestJet
20 Sep - 23 Sep WestJet direct
17 Sep - 17 Sep WestJet direct
16 Sep - 17 Sep WestJet direct
10 Sep - 17 Sep WestJet direct
28 Sep - 04 Oct WestJet direct
27 Sep - 04 Oct WestJet direct
30 Sep - 04 Oct WestJet direct
20 Sep - 27 Sep WestJet
19 Sep - 26 Sep Alaska Airlines

Also check the deals for one-way flights from Seattle to Calgary in September.

Skyscanner

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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