Cheap flights from Ontario to San Francisco (ONT - SFO)

ONT — SFO
Aug 16 — Aug 231

The best prices from Ontario to San Francisco are usually found in January or September, booked 30 days in advance, depart on a Wednesday or Saturday and return on a Monday

How to find the cheapest flight from Ontario (ONT) to San Francisco (SFO)

All the information you need to plan the best ONT to SFO flight in 2022: compare Ontario to San Francisco flight prices with the expected peak season, weather and rainfall in San Francisco.

ONT - SFO

Price

$73 - $227

SFO

Temperature

51.8 - 62.6 °F

SFO

Rainfall

0 - 4.4 inches

Popular inJuneHigh demand for flights, 39% potential price rise
Cheapest inJanuaryBest time to find cheap flights, 47% potential price drop
Round-trip from$73From Ontario to San Francisco
One-way from$22One-way flight from Ontario to San Francisco

Cheap Frontier flights from Ontario to San Francisco

Sep 13 - Sep 20
ONT

Ontario

SFO

San Francisco

Nonstop

1h 23m
SFO

San Francisco

ONT

Ontario

Nonstop

1h 29m
$43

Frontier

Pick Dates

Deal found 8/10/22

Sep 8 - Sep 10
ONT

Ontario

SFO

San Francisco

Nonstop

1h 23m
SFO

San Francisco

ONT

Ontario

Nonstop

1h 29m
$44

Frontier

Pick Dates

Deal found 8/9/22

Sep 7 - Sep 15
ONT

Ontario

SFO

San Francisco

Nonstop

1h 23m
SFO

San Francisco

ONT

Ontario

Nonstop

1h 29m
$47

Frontier

Pick Dates

Deal found 8/9/22

Cheap United Airlines flights from Ontario to San Francisco

Aug 20 - Aug 27
ONT

Ontario

SFO

San Francisco

Nonstop

1h 22m
SFO

San Francisco

ONT

Ontario

Nonstop

1h 31m
$209

United Airlines

Pick Dates

Deal found 8/10/22

Aug 21 - Aug 25
ONT

Ontario

SFO

San Francisco

Nonstop

1h 22m
SFO

San Francisco

ONT

Ontario

Nonstop

1h 31m
$225

United Airlines

Pick Dates

Deal found 8/10/22

Aug 16 - Aug 24
ONT

Ontario

SFO

San Francisco

Nonstop

1h 28m
SFO

San Francisco

ONT

Ontario

Nonstop

1h 31m
$229

United Airlines

Pick Dates

Deal found 8/9/22

Alternative routes for Ontario to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Top 9 airlines flying from Ontario to San Francisco

The chart below displays the airlines Cheapflights users traveling from Ontario to San Francisco choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Juneyao AirlinesCheapest$14Average$22FlexibilityNo cancel feeOn-time66%COVID-19 safety
Search Juneyao Airlines flights
FrontierCheapest$25Average$68FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
Spirit AirlinesCheapest$34Average$86FlexibilityNo cancel feeOn-time65%COVID-19 safety
Search Spirit Airlines flights
Alaska AirlinesCheapest$38Average$110FlexibilityNo cancel feeOn-time75%COVID-19 safety
Search Alaska Airlines flights
JetBlueCheapest$41Average$61FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search JetBlue flights
DeltaCheapest$71Average$92FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
Breeze AirwaysCheapest$78Average$104FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Breeze Airways flights
United AirlinesCheapest$93Average$217FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
JSXCheapest$208Average$313FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search JSX flights

Hourly flight availability from Ontario to San Francisco

See what time of day planes typically take off from Ontario to San Francisco
34%of flight departuresEarly morningMidnight to 6 am
4%of flight departuresMorning6 am to noon
62%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Ontario to San Francisco

See how many times per day planes take to the skies headed from Ontario to San Francisco
Sunday8daily flights
Monday8daily flights
Tuesday9daily flights
Wednesday9daily flights
Thursday9daily flights
Friday9daily flights
Saturday7daily flights