Cheap flights from Toronto to San Francisco from C$264 YHM, YTZ, YYZ → SFO

Found recently, and the cheapest we hold

It is also the cheapest return we hold, of any age.

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was C$393 (US$276) to C$966 (US$678).

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other 17-night return fares leaving within 3 days of 24 Dec to compare.

Every date we hold

3 fares on 2 departure dates

Found recently, and the cheapest we hold

What have prices looked like?

Over 22 days, 20 Oct to 11 Nov, the cheapest one-way we saw each day was C$212 (US$149) to C$371 (US$260).

22 days is a short history, so treat this range as an early guide.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other one-way fares leaving within 3 days of 20 Jan 2027 to compare.

Every date we hold

8 fares on 4 departure dates

Which month looks cheapest?

March 2027 is the cheapest month — from C$212 (US$149).

Return

Fares 90 to 179 days before departure were typically 49% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

One-way

Fares 90 to 179 days before departure were typically 35% lower than 30 to 59 days before departure.

From the cheapest one-way each day between 20 Oct and 11 Nov (22 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

How much is a return flight from Toronto to San Francisco?

The cheapest return found recently is C$586 (US$411) with United Airlines, 24 Dec to 10 Jan 2027, found 2 days ago.

How much is a one-way flight from Toronto to San Francisco?

The cheapest one-way found recently is C$264 (US$185) with Air Canada, 20 Jan 2027, found yesterday. The cheapest one-way we hold, of any age, is C$212 (US$149) with Porter Airlines Canada, 6 Mar 2027, found 3 days ago. The cheapest one-way fare on each of 4 departure dates is usually C$251 (US$176) to C$431 (US$302).

What is the cheapest month to fly from Toronto to San Francisco?

March 2027 is the cheapest month for a one-way, from C$212 (US$149), 6 Mar 2027, found 3 days ago.

How far ahead should I book a flight from Toronto to San Francisco?

In 49 days of prices between 24 Sept and 11 Nov, return fares 90 to 179 days before departure were typically 49% lower than 0 to 6 days before departure. In 22 days of prices between 20 Oct and 11 Nov, one-way fares 90 to 179 days before departure were typically 35% lower than 30 to 59 days before departure.

Is there a direct flight from Toronto to San Francisco?

Yes, the cheapest nonstop one-way found recently is C$212 (US$149) with Porter Airlines Canada, 6 Mar 2027, found 3 days ago.

How long is the flight from Toronto to San Francisco?

The cheapest nonstop one-way found recently, with Porter Airlines Canada on 6 Mar 2027, takes 5 h 55 min from Pearson International Airport (YYZ) to San Francisco International Airport (SFO). The cheapest one-way found recently, with Air Canada on 20 Jan 2027, takes 9 h 36 min with 1 stop.

Which airlines have the cheapest flights from Toronto to San Francisco?

Between 7 Jan 2027 and 6 Mar 2027, Porter Airlines Canada has the cheapest one-way on 3 of the 4 departure dates we hold, and Air Canada on 1.