Cheapest return flights from Waterloo to San Francisco in May from $264

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

Return flights

04 May - 12 May WestJet
25 May - 28 May WestJet
22 May - 25 May WestJet
21 May - 25 May WestJet
31 May - 06 Jun WestJet
05 May - 12 May WestJet
01 May - 03 May WestJet
01 May - 31 May WestJet
23 May - 25 May WestJet
01 May - 14 May WestJet
07 May - 10 May WestJet
23 May - 02 Jun WestJet
30 May - 07 Jun WestJet

Also check the deals for one-way flights from Waterloo to San Francisco in May.

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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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