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Cheap flights from Ontario to San Francisco (ONT - SFO) from $30

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/29. 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.
ONT — SFO
May 3 — May 101
From?
To?
Fri 5/3
Fri 5/10
1 adult, Economy
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The best prices from Ontario to San Francisco are usually found in June or March, booked 76 days in advance, depart on a Tuesday or Saturday and return on a Monday

Cheap flight deals from Ontario to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 28, 2024.

Popular in

January

Cheapest in

June

Round-trip from

$268

One-way from

$30
High demand for flights, 20% potential price rise
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Best time to find cheap flights, 17% potential price drop
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From Ontario to San Francisco
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One-way flight from Ontario to San Francisco
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What is the cheapest day to fly round-trip from Ontario to San Francisco?

Users have found that flying from Ontario to San Francisco on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Ontario to San Francisco?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 57 days in advance, which can save you up to 59% on flights from Ontario to San Francisco compared to booking the week you need them. Waiting 57 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 $131. For sooner than that we have options available in the next 3 days from $203.

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

February can be a great time to fly to San Francisco from Ontario with a flight ticket averaging about $142. Cheapflights users have found deals in the month of February for as cheap as $49. The most expensive prices can be found in the month of November.

When is the cheapest time to fly from Ontario to San Francisco (ONT - SFO)?

One of the essential ways to save on airfare from Ontario to San Francisco is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 20% on airfare.

Cheap Frontier flights from Ontario to San Francisco

Explore cheap flight options specifically provided by Frontier for the route between Ontario and San Francisco. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
Take a look at some of the lowest-priced Frontier flights heading from Ontario to San Francisco. Make sure to check back often as deals are often changing.
Tue 5/77:53 amONT - SFO
Nonstop1h 27mFrontier
Tue 5/1410:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$48
Wed 5/87:58 amONT - SFO
Nonstop1h 27mFrontier
Wed 5/1510:15 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/28$52
Tue 5/217:39 amONT - SFO
Nonstop1h 28mFrontier
Tue 5/285:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$53
Sat 5/115:59 pmONT - SFO
Nonstop1h 28mFrontier
Wed 5/1510:15 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$56
Thu 5/167:39 amONT - SFO
Nonstop1h 28mFrontier
Tue 5/215:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$58
Tue 10/87:36 amONT - SFO
Nonstop1h 26mFrontier
Wed 10/165:15 amSFO - ONT
Nonstop1h 21mFrontier
Deal found 4/27$59
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Mon 5/610:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$60
Sat 5/187:39 amONT - SFO
Nonstop1h 28mFrontier
Tue 5/215:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$61
Sat 5/115:59 pmONT - SFO
Nonstop1h 28mFrontier
Mon 5/1310:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$62

  • One of the most popular airlines traveling from Ontario to San Francisco is Frontier. Flights from Frontier traveling this route typically cost $245.01 RT. This price is typically 20% cheaper than other airlines that offer Ontario to San Francisco flights. When booking this route, the cheapest RT price found was $109. Ontario Airport is the most common Ontario airport to take off from when flying to San Francisco. San Francisco Airport is the most popular arrival airport in San Francisco. When flying from Ontario to San Francisco, Frontier flights are 1% more popular than any other airline flying that same route.

Cheap Alaska Airlines flights from Ontario to San Francisco

Explore cheap flight options specifically provided by Alaska Airlines for the route between Ontario and San Francisco. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
Browse through some of the cheapest Alaska Airlines flights traveling from Ontario to San Francisco. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Tue 5/77:00 amONT - SFO
2 stops9h 04mAlaska Airlines
Tue 5/148:00 amSFO - ONT
2 stops13h 53mAlaska Airlines
Deal found 4/28$641
Sat 5/47:00 amONT - SFO
2 stops7h 54mAlaska Airlines
Sat 5/47:35 pmSFO - ONT
2 stops15h 05mAlaska Airlines
Deal found 4/27$718
Tue 5/710:15 amONT - SFO
2 stops12h 07mAlaska Airlines
Wed 5/88:40 amSFO - ONT
2 stops7h 25mAlaska Airlines
Deal found 4/27$748
Sat 5/47:00 amONT - SFO
2 stops7h 54mAlaska Airlines
Sun 5/52:50 pmSFO - ONT
2 stops9h 09mAlaska Airlines
Deal found 4/27$750
Sat 5/47:00 amONT - SFO
2 stops7h 54mAlaska Airlines
Sat 5/46:20 pmSFO - ONT
2 stops15h 13mAlaska Airlines
Deal found 4/28$991

  • Alaska Airlines is one of the most popular airlines used for those traveling from Ontario to San Francisco. Flights on this route from Alaska Airlines typically cost $100.00 RT, a price that is 641% cheaper than the average Ontario to San Francisco flight. The cheapest flight found was $40 RT. Ontario Airport is the most common Ontario airport to take off from when flying to San Francisco. San Francisco Airport is the most popular arrival airport in San Francisco. When flying from Ontario to San Francisco, Alaska Airlines flights are -14% more popular than any other airline flying that same route.

Cheap Ontario to San Francisco flights in April & May 2024

Find cheap flight options from Ontario to San Francisco specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,991,349 searches. Prices were last updated on April 28, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to San Francisco in 2024. For more flight deals, be sure to check back very soon.
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Tue 5/710:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/25$48
Sat 5/115:59 pmONT - SFO
Nonstop1h 28mFrontier
Tue 5/1410:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/26$52
Tue 5/217:39 amONT - SFO
Nonstop1h 28mFrontier
Tue 5/285:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$53
Tue 5/147:53 amONT - SFO
Nonstop1h 27mFrontier
Wed 5/1510:15 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/26$56
Sat 5/187:39 amONT - SFO
Nonstop1h 28mFrontier
Sun 5/195:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$57
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Mon 5/610:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$58
Tue 5/287:39 amONT - SFO
Nonstop1h 28mFrontier
Wed 5/295:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$59
Tue 5/147:53 amONT - SFO
Nonstop1h 27mFrontier
Wed 5/295:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$61
Sat 5/115:59 pmONT - SFO
Nonstop1h 28mFrontier
Mon 5/1310:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$62

Ontario to San Francisco 2024 flight deals

Discover exclusive flight deals for travel between Ontario and San Francisco in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to San Francisco in 2024. For more flight deals, be sure to check back very soon.
Tue 5/77:53 amONT - SFO
Nonstop1h 27mFrontier
Tue 5/1410:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$48
Tue 5/217:39 amONT - SFO
Nonstop1h 28mFrontier
Tue 5/285:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$53
Sat 5/115:59 pmONT - SFO
Nonstop1h 28mFrontier
Wed 5/1510:15 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$56
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Mon 5/610:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$58
Tue 10/87:36 amONT - SFO
Nonstop1h 26mFrontier
Wed 10/165:15 amSFO - ONT
Nonstop1h 21mFrontier
Deal found 4/27$59
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Mon 5/610:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$60
Sat 5/187:39 amONT - SFO
Nonstop1h 28mFrontier
Tue 5/215:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$61
Sat 5/115:59 pmONT - SFO
Nonstop1h 28mFrontier
Mon 5/1310:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$62
Sat 6/17:39 amONT - SFO
Nonstop1h 28mFrontier
Mon 6/35:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/27$63

Non-stop flights to San Francisco from Ontario

Discover non-stop flight options from Ontario to San Francisco. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
For a quicker trip, book one of these direct flights from Ontario to San Francisco. Users can also choose from other Ontario to San Francisco flights by using the search form above.
Tue 5/77:53 amONT - SFO
Nonstop1h 27mFrontier
Tue 5/1410:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$48
Tue 5/217:39 amONT - SFO
Nonstop1h 28mFrontier
Tue 5/285:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$53
Sat 5/115:59 pmONT - SFO
Nonstop1h 28mFrontier
Wed 5/1510:15 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$56
Thu 5/167:39 amONT - SFO
Nonstop1h 28mFrontier
Tue 5/215:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$58
Tue 10/87:36 amONT - SFO
Nonstop1h 26mFrontier
Wed 10/165:15 amSFO - ONT
Nonstop1h 21mFrontier
Deal found 4/27$59
Sat 5/187:39 amONT - SFO
Nonstop1h 28mFrontier
Tue 5/215:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/26$61
Sat 5/115:59 pmONT - SFO
Nonstop1h 28mFrontier
Mon 5/1310:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$62
Sat 6/17:39 amONT - SFO
Nonstop1h 28mFrontier
Mon 6/35:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/27$63
Tue 5/147:53 amONT - SFO
Nonstop1h 27mFrontier
Thu 5/165:15 amSFO - ONT
Nonstop1h 24mFrontier
Deal found 4/27$64

Ontario to San Francisco flights leaving soon

Find last-minute flight options from Ontario to San Francisco for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
Book one of these great deals on flights from Ontario to San Francisco. Users should be sure to double check the price, date, and time of their last-minute flight.
Wed 5/87:58 amONT - SFO
Nonstop1h 27mFrontier
Wed 5/1510:15 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/28$52
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Tue 5/710:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/28$58
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Mon 5/610:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$60
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Fri 5/1010:15 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$68
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Sun 5/510:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$70
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Mon 5/610:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/28$99
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Sun 5/510:10 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 4/27$103
Sat 5/45:59 pmONT - SFO
Nonstop1h 28mFrontier
Tue 5/76:19 pmSFO - ONT
1 stop3h 38mFrontier
Deal found 4/27$114
Tue 5/77:53 amONT - SFO
Nonstop1h 27mFrontier
Wed 5/86:19 pmSFO - ONT
1 stop12h 49mFrontier
Deal found 4/27$123

One-way flights to San Francisco from Ontario

Search for one-way flight options from Ontario to San Francisco. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
Take a look at some of the one-way flights we've detected from Ontario to San Francisco. Users in need of a round-trip flight from Ontario to San Francisco instead should update the search form at the top of page.
Wed 5/297:39 amONT - SFO
Nonstop1h 28mFrontier
Deal found 4/27$30
Sat 5/115:59 pmONT - SFO
Nonstop1h 28mFrontier
Deal found 4/27$32
Thu 5/167:39 amONT - SFO
Nonstop1h 28mFrontier
Deal found 4/27$34
Thu 5/97:58 amONT - SFO
Nonstop1h 27mFrontier
Deal found 4/27$35
Sat 6/297:29 amONT - SFO
Nonstop1h 28mFrontier
Deal found 4/27$37
Tue 7/307:36 amONT - SFO
Nonstop1h 26mFrontier
Deal found 4/27$38
Sun 5/267:39 amONT - SFO
Nonstop1h 28mFrontier
Deal found 4/27$39
Mon 7/17:36 amONT - SFO
Nonstop1h 26mFrontier
Deal found 4/27$40
Mon 6/37:39 amONT - SFO
Nonstop1h 28mFrontier
Deal found 4/27$41

Find flights from Ontario to San Francisco within your budget

Customize your flight search to find flights from Ontario to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$48 - $214

Route

Depart

Return

Price

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Tue 5/7

Nonstop1h 27m

San Francisco

Tue 5/14

Nonstop1h 29m

$48

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Tue 5/21

Nonstop1h 28m

San Francisco

Tue 5/28

Nonstop1h 24m

$53

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Sat 5/11

Nonstop1h 28m

San Francisco

Wed 5/15

Nonstop1h 29m

$56

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Thu 5/16

Nonstop1h 28m

San Francisco

Tue 5/21

Nonstop1h 24m

$58

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Tue 10/8

Nonstop1h 26m

San Francisco

Wed 10/16

Nonstop1h 21m

$59

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Sat 5/18

Nonstop1h 28m

San Francisco

Tue 5/21

Nonstop1h 24m

$61

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Sat 5/11

Nonstop1h 28m

San Francisco

Mon 5/13

Nonstop1h 29m

$62

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Fri 5/17

Nonstop1h 28m

San Francisco

Tue 5/21

2 stops11h 14m

$196

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Thu 7/18

Nonstop1h 20m

San Francisco

Sat 7/20

Nonstop1h 30m

$214

Flights are sorted by cheapest first

Deals found on 4/27

When is the best time to book a flight from Ontario to San Francisco?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to San Francisco. Price data was last updated on January 28, 2024.
Booking 76 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

When is the cheapest time to fly from Ontario to San Francisco?

Use this chart to determine the cheapest time to fly round-trip from Ontario to San Francisco. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ontario to San Francisco flight should consider departing on Wednesday at noon when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to San Francisco by month

Plan your trip from Ontario to San Francisco by taking into account the cheapest months to travel. The average price of a one-way flight from Ontario to San Francisco is currently $36 while a round-trip flight costs $90. Price data was last updated on April 21, 2024.

Currently, September is the cheapest month in which you can book a flight from Ontario to San Francisco (average of $268). Flying from Ontario to San Francisco in June is currently the most expensive (average of $384). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$274

February

$281

March

$330

April

$306

May

$310

June

$384

July

$368

August

$298

September

$268

October

$268

November

$287

December

$268

Temperature and rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature and rainfall totals by month.

SFO

Temperature

51.8 - 62.6 °F

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated April 28, 2024.
Read reviews from past customers who have flown Frontier, Alaska Airlines and United Airlines from Ontario to San Francisco. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,117 reviews
Check prices

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

Alaska Airlines
8.1
Very good
9,117 reviews
Alaska Airlines
8.1
Very good
9,117 reviews
Check prices

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

Delta
8.1
Very good
10,951 reviews
Alaska Airlines
8.1
Very good
9,117 reviews
Check prices

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

Avianca
7.5
Good
3,909 reviews
Alaska Airlines
8.1
Very good
9,117 reviews
Check prices

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

United Airlines
7.4
Good
11,228 reviews
Alaska Airlines
8.1
Very good
9,117 reviews
Check prices

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

American Airlines
7.3
Good
14,875 reviews
Alaska Airlines
8.1
Very good
9,117 reviews
Check prices

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

Related info for your journey

Find useful and relevant information for your journey from Ontario to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Ontario to San Francisco?

    To fly from Ontario to San Francisco, you need to book a flight from Ontario (ONT) to San Francisco (SFO). Nonstop flights to San Francisco from Ontario take 1h 20m on average. When it comes time to book airfare, you have a few options: there are 6 outbound flights from Ontario to San Francisco offered by 8 different airlines.

  • Can I find flights from Ontario to San Francisco for under $100 on Cheapflights?

    Yes, there are multiple flights from Ontario to San Francisco for under $100. The cheapest flight booked recently is on Frontier for just $48, but on average you can expect to pay $66.

  • Are there nonstop flights from Ontario to San Francisco for under $100 on Cheapflights?

    Cheapflights has at least 20 direct flights from Ontario to San Francisco under $100. A good price for a nonstop flight from Ontario to San Francisco is less than $66.

  • Are there last-minute flights available from Ontario to San Francisco for under $100?

    There are currently 20+ open flights from Ontario to San Francisco within the next 7 days for less than $100.

  • What days are nonstop flights available from Ontario to San Francisco?

    You can find nonstop flights on the following days: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday.

  • How popular is this Ontario to San Francisco flight route?

    This flight path from Ontario to San Francisco was viewed by 90 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How many flights depart from Ontario to San Francisco on average per day?

    7 flight departures from Ontario to San Francisco per day on average.
    Early Morning (Midnight to 6am) - 100% of flight departures

  • How long is the flight from Ontario to San Francisco?

    A quick flight from Ontario to San Francisco can take about 1h 27m. Frontier provides one of the quickest options available for as low as $48. The distance from Ontario to San Francisco is about 364 mi. All flights are typically nonstop.

  • What is the cheapest airline to fly from Ontario to San Francisco round-trip?

    Flying on Frontier is currently your cheapest option to San Francisco, with prices starting at $48. You may be able to fly from Ontario to San Francisco for 66% less than the average price by searching for this airline.

  • What are the most popular airlines that fly from Ontario to San Francisco?

    Before booking your flight from Ontario to San Francisco check out the most popular airlines for this route: American Airlines, Alaska Airlines or JetBlue.

  • What are the most reliable airlines from Ontario to San Francisco?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ontario to San Francisco on time: United Airlines (73%), SkyWest Airlines (66%), Air Canada (60%).

  • What are the cheapest flights from Ontario to San Francisco?

    On average you can expect to pay $664 for a flight from Ontario to San Francisco. The cheapest flight overall is $19 while the most popular route, (Ontario - San Francisco) is currently priced at $48.

  • What does ONT to SFO mean?

    ONT and SFO are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. ONT to SFO refers to a flight route from Ontario Airport to San Francisco Airport.

  • Can I find deals for flights from Ontario to San Francisco that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to San Francisco flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to San Francisco with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to San Francisco flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Ontario to San Francisco that include hotel bookings?

    Yes. In addition to deals on Ontario to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Francisco.

  • Can I find deals for business class flights from Ontario to San Francisco?

    Yes. Cheapflights offers flight deals from Ontario to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Ontario to San Francisco that allow pets onboard?

    Many airlines flying from Ontario to San Francisco offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to San Francisco?

    Yes, you can often find last-minute deals on Ontario to San Francisco flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ontario to San Francisco flight deals updated?

    The Ontario to San Francisco flight deals you see on this page were last updated on 4/27.

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Alternative routes for Ontario to San Francisco
See prices for flight routes from nearby airports that may be better suited for you.

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Top 8 airlines flying from Ontario to San Francisco

Discover the top 8 airlines that operate flights from Ontario to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$31Average$82FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$40Average$100FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Alaska AirlinesCheapest$45Average$114FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
JetBlueCheapest$51Average$84FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
DeltaCheapest$65Average$128FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Breeze AirwaysCheapest$78Average$133FlexibilityNo cancel feeOn-timeN/A
Search Breeze Airways flights
United AirlinesCheapest$109Average$245FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$177Average$291FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
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Ontario to Springfield, Massachusetts flights

Search flights from Ontario to San Francisco by cabin class

Find flights from Ontario to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Ontario to San Francisco

Find hourly flight availability from Ontario to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 28, 2024.
37%of flight departuresEarly morningMidnight to 6 am
63%of flight departuresMorning6 am to noon
0%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

Explore weekly flight availability from Ontario to San Francisco. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 28, 2024.
Sunday4daily flights
Monday7daily flights
Tuesday7daily flights
Wednesday7daily flights
Thursday8daily flights
Friday7daily flights
Saturday5daily flights

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to San Francisco?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to San Francisco?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to San Francisco for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ontario to San Francisco with no change fees?

Yes! Cheapflights helps users easily find flights from Ontario to San Francisco with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to San Francisco become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from Ontario today and book when prices fit your budget.

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