AirHint found the following cheapest return flights from Waterloo (YKF) to San Francisco (SFO) in October 2026 (see full year).
Return flights
| 12 Oct - 19 Oct | WestJet | ||
| 02 Oct - 04 Oct | WestJet | ||
| 16 Oct - 18 Oct | WestJet | ||
| 23 Oct - 25 Oct | WestJet |
Also check the deals for one-way flights from Waterloo to San Francisco in October.
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