When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 31 days in advance, which can save you up to 73% on flights from Ontario to USA compared to booking the week you need them. Waiting 31 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $398. For sooner than that we have options available in the next 3 days from $543.
September can be a great time to fly to USA from Ontario with a flight ticket averaging about $349. Cheapflights users have found deals in the month of September for as cheap as $119. The most expensive prices can be found in the month of December.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to USA as you normally would.
Fly from
Fly to
Budget
$39 - $157
Route
Depart
Return
Price
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Tue 9/10
Nonstop1h 26m
San Francisco
Sat 9/21
Nonstop1h 21m
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Sat 9/21
Nonstop1h 26m
San Francisco
Sat 10/5
Nonstop1h 21m
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Wed 10/9
Nonstop1h 26m
San Francisco
Tue 10/22
Nonstop1h 21m
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Tue 8/6
Nonstop1h 26m
San Francisco
Tue 8/13
Nonstop1h 21m
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Mon 5/20
Nonstop1h 28m
San Francisco
Tue 5/21
Nonstop1h 24m
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Sun 5/19
Nonstop1h 28m
San Francisco
Tue 5/21
Nonstop1h 24m
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Tue 5/21
Nonstop1h 28m
San Francisco
Mon 5/27
Nonstop1h 24m
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Sun 5/26
Nonstop2h 20m
Portland
Sat 6/1
1 stop5h 41m
OntarioSeattle/Tacoma Intl
ONT - SEA
ONTSEA
Ontario
Wed 7/31
Nonstop2h 35m
Seattle/Tacoma Intl
Tue 8/6
Nonstop2h 33m
No data available for this route at this time. Please check back soon.
Boarding
Crew
Entertainment
Comfort
Food
Overall
Reviews
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
Boarding
Crew
Entertainment
Comfort
Food
Overall
Reviews
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
Boarding
Crew
Entertainment
Comfort
Food
Overall
Reviews
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
Boarding
Crew
Entertainment
Comfort
Food
Overall
Reviews
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
Boarding
Crew
Entertainment
Comfort
Food
Overall
Reviews
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
Boarding
Crew
Entertainment
Comfort
Food
Overall
Reviews
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
24%of flight departures | Early morningMidnight to 6 am |
---|---|
42%of flight departures | Morning6 am to noon |
16%of flight departures | AfternoonNoon to 6 pm |
18%of flight departures | Evening6 pm to midnight |
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