Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 27/11

6:00 a.m.-7:30 a.m.

Nonstop1h 30m

San Francisco

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 119

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Tue 29/12

6:00 a.m.-7:33 a.m.

Nonstop1h 33m

San Francisco

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 130

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Wed 21/10

4:03 p.m.-5:50 p.m.

Nonstop1h 47m

San Francisco

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 130

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Sat 3/10

4:03 p.m.-5:50 p.m.

Nonstop1h 47m

San Francisco

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 130

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 19/2

6:53 p.m.-8:22 p.m.

Nonstop1h 29m

San Francisco

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 167

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 2/10

9:25 a.m.-10:54 a.m.

Nonstop1h 29m

San Francisco

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 167

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Wed 23/9

9:01 a.m.-10:30 a.m.

Nonstop1h 29m

San Francisco

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 219

Quickest round-trip

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Sat 19/9

8:00 a.m.-9:27 a.m.

Nonstop1h 27m

San Francisco

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 219

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Mon 28/9

6:06 a.m.-7:33 a.m.

Nonstop1h 27m

San Francisco

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 219

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 18/9

6:08 a.m.-7:35 a.m.

Nonstop1h 27m

San Francisco

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 219

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 22 resultsSorted by cheapest first

Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from Ontario with our price prediction graph.

ONT-YVR

ONT-SFO

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Browse thousands of different options on Cheapflights for your next trip

Non-stop flights from California

Popular North America origins

Popular Ontario routes

Popular United States origins

United States destinations

Direct flights from California cities

Direct flights from Los Angeles

Direct flights from San Francisco

Direct flights from San Diego

Direct flights from Palm Springs

Direct flights from Fresno

Direct flights from San Jose

Direct flights from Reno

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

Find direct flights from Ontario within your budget

Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from Ontario with our price prediction graph.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Direct flights from California cities

Book a direct flight from one of these other cities located in California.

Direct flights from North America cities

Book a direct flight from one of these popular origins located in North America.

Flights to and from Ontario

Consider one of these popular flight routes traveling to and from Ontario

Non-stop flights from United States

Book a direct flight from one of these popular origins located in United States.

Direct flights to United States

Consider flying direct to one of these destinations in United States

100% Free

Book with Flexibility

Travel Smart

C$ 81+ Direct flights from Ontario

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

Find direct flights from Ontario within your budget

Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from Ontario with our price prediction graph.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Direct flights from California cities

Book a direct flight from one of these other cities located in California.

Direct flights from North America cities

Book a direct flight from one of these popular origins located in North America.

Flights to and from Ontario

Consider one of these popular flight routes traveling to and from Ontario

Non-stop flights from United States

Book a direct flight from one of these popular origins located in United States.

Direct flights to United States

Consider flying direct to one of these destinations in United States

100% Free

Book with Flexibility

Travel Smart