Cheap flights from San Francisco to Ontario (SFO - ONT) from $21

This is the cheapest one-way flight price, found on 5/31. Prices may vary by date and flight preferences.
SFO — ONT
Jun 6 — Jun 131
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The best prices from San Francisco to Ontario are usually found in September or May, booked 25 days in advance, depart on a Tuesday or Thursday and return on a Thursday

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

All the information you need to plan the best SFO to ONT flight in 2023: compare San Francisco to Ontario flight prices with the expected peak season, weather and rainfall in Ontario.

Popular in

June

Cheapest in

September

Round-trip from

$217

One-way from

$21
High demand for flights, 40% potential price rise
Best time to find cheap flights, 40% potential price drop
From San Francisco to Ontario
One-way flight from San Francisco to Ontario

SFO - LAX

Price

$217 - $502

LAX

Temperature

57.2 - 73.4 °F

LAX

Rainfall

0 - 3.4 inches

Cheap flights from San Francisco to Ontario in June, July 2023

The best prices found for SFO to ONT flights for June, July

San Francisco to Ontario 2023 flight deals

Cheap flights to Ontario from San Francisco found for this year

Cheap Frontier flights from San Francisco to Ontario

Non-stop flights to Ontario from San Francisco

Save time with San Francisco to Ontario direct flight deals

Last minute flights from San Francisco to Ontario

Late deals on return flights to Ontario from San Francisco, departing today and this week

One-way flights to Ontario from San Francisco

The cheapest one-way flights from San Francisco to Ontario

Find flights from San Francisco to Ontario within your budget

Use the slider to find flights from San Francisco to Ontario that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$47 - $62

Route

Depart

Return

Price

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Wed 6/14

Nonstop1h 25m

Ontario

Thu 6/22

Nonstop1h 26m

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Tue 6/13

Nonstop1h 25m

Ontario

Wed 6/14

Nonstop1h 24m

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Thu 6/15

Nonstop1h 21m

Ontario

Tue 6/20

Nonstop1h 26m

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Tue 6/13

Nonstop1h 25m

Ontario

Wed 6/21

Nonstop1h 26m

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Tue 6/13

Nonstop1h 25m

Ontario

Thu 6/15

Nonstop1h 26m

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Tue 6/13

Nonstop1h 25m

Ontario

Thu 6/15

Nonstop1h 26m

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Tue 7/11

Nonstop1h 23m

Ontario

Tue 7/18

Nonstop1h 25m

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Tue 6/13

Nonstop1h 25m

Ontario

Sat 6/17

Nonstop1h 26m

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Tue 6/20

Nonstop1h 25m

Ontario

Thu 6/22

Nonstop1h 26m

Flights are sorted by cheapest first

Deals found on 5/31

Reviews of Airlines Servicing Ontario

United Airlines
7.6
Good
1,531 reviews

Crew

8.2

Overall

7.6

Boarding

7.8

Comfort

7.4

Entertainment

7.1

Food

6.8

Reviews

1 / 10

The airport at Dublin was horrible. It was confusing without enough signage, and the food options were not only limited but filthy.

United Airlines
7.6
Good
1,531 reviews
United Airlines
7.6
Good
1,531 reviews

Crew

8.2

Overall

7.6

Boarding

7.8

Comfort

7.4

Entertainment

7.1

Food

6.8

Reviews

1 / 10

The airport at Dublin was horrible. It was confusing without enough signage, and the food options were not only limited but filthy.

Frontier
5.9
Fair
667 reviews
United Airlines
7.6
Good
1,531 reviews

Crew

8.2

Overall

7.6

Boarding

7.8

Comfort

7.4

Entertainment

7.1

Food

6.8

Reviews

1 / 10

The airport at Dublin was horrible. It was confusing without enough signage, and the food options were not only limited but filthy.

Related info for your journey

Useful info, stats and facts about San Francisco to Ontario flights.

Alternative routes for San Francisco to Ontario

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

Top 6 airlines flying from San Francisco to Ontario

The chart below displays the airlines Cheapflights users traveling from San Francisco to Ontario choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
FrontierCheapest$29Average$80FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
JetBlueCheapest$48Average$148FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search JetBlue flights
DeltaCheapest$65Average$129FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
Alaska AirlinesCheapest$77Average$129FlexibilityNo cancel feeOn-time75%COVID-19 safety
Search Alaska Airlines flights
Breeze AirwaysCheapest$78Average$114FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Breeze Airways flights
United AirlinesCheapest$89Average$247FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights

Hourly flight availability from San Francisco to Ontario

See what time of day planes typically take off from San Francisco to Ontario
1%of flight departuresEarly morningMidnight to 6 am
29%of flight departuresMorning6 am to noon
42%of flight departuresAfternoonNoon to 6 pm
28%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from San Francisco to Ontario

See how many times per day planes take to the skies headed from San Francisco to Ontario
Sunday4daily flights
Monday6daily flights
Tuesday6daily flights
Wednesday6daily flights
Thursday6daily flights
Friday6daily flights
Saturday2daily flights