Are there nonstop flights from Toronto (YTZ) to San Francisco (SFO)?

No. The fastest connection is via Chicago, about 5h 20m of total flying time.

What is the fastest connection from Toronto (YTZ) to San Francisco (SFO)?

via Chicago ≈ 5h 20m, via Nashville ≈ 5h 56m, via Washington ≈ 6h 12m (estimated flying time, excluding layovers).

Billy Bishop Toronto City Airport (YTZ) to San Francisco International Airport (SFO)・3,647 km

No nonstop flights. The fastest connection is via Chicago (ORD), about 5h 20m of flying time (layover not included).

None.

6 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.