Cheapest return flights from Waterloo to Seattle in June from $441

AirHint found the following cheapest return flights from Waterloo (YKF) to Seattle (SEA) in June 2026 (see full year).

Return flights

03 Jun - 10 Jun WestJet
06 Jun - 10 Jun WestJet
08 Jun - 22 Jun WestJet
10 Jun - 16 Jun WestJet
17 Jun - 24 Jun WestJet
15 Jun - 16 Jun WestJet
17 Jun - 19 Jun WestJet
19 Jun - 21 Jun WestJet
12 Jun - 14 Jun WestJet
22 Jun - 25 Jun WestJet

Also check the deals for one-way flights from Waterloo to Seattle in June.

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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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