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San Francisco Bay Area

$33+ Cheap flights from Ontario (ONT) to San Francisco Bay Area

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 3/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SFO
Dec 30 — Jan 61
Mon 12/30
Mon 1/6
1 adult, Economy
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Cheap flight deals from Ontario to San Francisco Bay Area

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to San Francisco Bay Area (zzXIH). 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 December 25, 2024.

Round-trip from

$56
(SmartFares)

One-way from

$34
(Cheapflightsfares)
From Ontario to San Francisco Bay Area
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One-way flight from Ontario to San Francisco Bay Area
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Find flight deals from Ontario to San Francisco Bay Area

Cheapest flights from Ontario to San Francisco Bay Area
Explore the most affordable flight options available from Ontario to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 25, 2024.

This Frontier deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/3012:00 pmONT - SFO
Nonstop1h 29mFrontier
Fri 1/35:32 pmSFO - ONT
Nonstop1h 25mFrontier
Deal found 12/24$100
This Booking.com deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/3012:59 amONT - SJC
1 stop9h 21mFrontier
Thu 1/27:26 pmSJC - ONT
1 stop17h 34mFrontier
Deal found 12/24$202
This eDestinos deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/3012:59 amONT - SJC
1 stop9h 21mMultiple Airlines
Fri 1/310:32 amSJC - ONT
2 stops31h 38mMultiple Airlines
Deal found 12/24$296
This United Airlines deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/291:57 pmONT - SFO
Nonstop1h 38mUnited Airlines
Tue 2/44:35 pmSFO - ONT
Nonstop1h 29mUnited Airlines
Deal found 12/24$361
This Southwest deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/291:50 pmONT - OAK
1 stop4h 05mSouthwest
Mon 1/611:25 amOAK - ONT
Nonstop1h 25mSouthwest
Deal found 12/23$416
This Southwest deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/259:25 amONT - SJC
1 stop6h 55mSouthwest
Sun 1/267:45 amSJC - ONT
Nonstop1h 20mSouthwest
Deal found 12/24$434
This Southwest deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/295:05 amONT - SFO
1 stop7h 00mSouthwest
Tue 2/46:35 amSFO - ONT
2 stops8h 30mSouthwest
Deal found 12/24$445
This American Airlines deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/295:38 amONT - STS
1 stop6h 45mAmerican Airlines
Mon 1/612:53 pmSTS - ONT
1 stop5h 32mAmerican Airlines
Deal found 12/25$496
This Orbitz deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3112:59 amONT - SFO
1 stop7h 00mMultiple Airlines
Sat 1/46:00 amSFO - ONT
2 stops11h 09mMultiple Airlines
Deal found 12/24$525
This Alaska Airlines deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/308:32 pmONT - OAK
1 stop11h 15mAlaska Airlines
Fri 1/37:32 pmOAK - ONT
1 stop14h 13mAlaska Airlines
Deal found 12/23$532
This American Airlines deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2612:46 pmONT - SJC
1 stop6h 02mAmerican Airlines
Sat 12/289:53 amSJC - ONT
1 stop5h 32mAmerican Airlines
Deal found 12/24$585
This Alaska Airlines deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/286:00 amONT - SJC
1 stop5h 54mAlaska Airlines
Thu 1/308:10 amSJC - ONT
1 stop7h 01mAlaska Airlines
Deal found 12/25$690

Find flights from Ontario to San Francisco Bay Area within your budget

Customize your flight search to find flights from Ontario to San Francisco Bay Area 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 2,558,603 searches. Data last updated December 25, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Fri 1/10

6:00 am-7:35 am

Nonstop1h 35m

San Francisco

Sun 1/12

9:59 pm-11:23 pm

Nonstop1h 24m

$56

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Tue 1/7

6:15 am-7:46 am

Nonstop1h 31m

San Francisco

Fri 1/10

7:00 pm-8:29 pm

Nonstop1h 29m

$57

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

Thu 3/13

10:34 am-5:06 pm

1 stop6h 32m

San Jose

Mon 3/24

1:00 pm-8:45 pm

1 stop7h 45m

$104

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Fri 1/10

7:00 am-12:52 pm

1 stop5h 52m

San Francisco

Sun 1/12

9:59 pm-11:23 pm

Nonstop1h 24m

$137

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sun 4/20

9:11 am-10:44 am

Nonstop1h 33m

Santa Rosa Sonoma County

Thu 4/24

7:00 am-8:26 am

Nonstop1h 26m

$138

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Sat 1/18

5:44 pm-12:52 pm

1 stop19h 08m

San Francisco

Sat 1/25

8:20 am-5:04 pm

1 stop8h 44m

$202

OntarioOakland

ONT - OAK

ONTOAK

Ontario

Wed 1/22

11:50 am-1:10 pm

Nonstop1h 20m

Oakland

Wed 1/29

6:50 am-8:15 am

Nonstop1h 25m

$208

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

Thu 1/23

8:30 am-9:50 am

Nonstop1h 20m

San Jose

Fri 1/24

7:05 pm-8:20 pm

Nonstop1h 15m

$222

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Wed 1/15

6:00 am-7:57 pm

1 stop13h 57m

San Francisco

Wed 1/22

9:21 am-3:25 pm

1 stop6h 04m

$243

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sat 2/8

6:10 am-12:28 pm

1 stop6h 18m

Santa Rosa Sonoma County

Sun 2/9

12:58 pm-6:24 pm

1 stop5h 26m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 37 results
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Best time to book a flight from Ontario to San Francisco Bay Area

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

Travel insights for flights from Ontario to San Francisco Bay Area

Get recent, data-driven insights about flights from Ontario to San Francisco Bay Area including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario to San Francisco Bay Area?

Currently, January is the cheapest month in which you can book a flight from Ontario to San Francisco Bay Area (average of $276). Flying from Ontario to San Francisco Bay Area in June is currently the most expensive (average of $406). 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.

What is the cheapest time of day to fly from ONT to XIH?

Find hourly flight availability from Ontario to San Francisco Bay Area. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 25, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to San Francisco Bay Area as you normally would.

Weekly flight availability from Ontario to San Francisco Bay Area

Explore weekly flight availability from Ontario to San Francisco Bay Area. 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 December 25, 2024.

The most flights from ONT to zzXIH are scheduled on a Monday (12 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in San Francisco Bay Area by month

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

In terms of precipitation, rainfall in San Francisco Bay Area ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco Bay Area when rainfall is around 0.0 in.

Temperature in San Francisco Bay Area by month

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

If weather is an important factor for your trip to San Francisco Bay Area, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Francisco Bay Area

Get insights into the airlines that provide service to San Francisco Bay Area. 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 Bay Area. Reviews last updated December 25, 2024.
Read reviews from past customers who have flown United Airlines, Alaska Airlines and Delta from Ontario to San Francisco Bay Area. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,758 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,758 reviews
Southwest
8.1
Very good
4,758 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,553 reviews
Southwest
8.1
Very good
4,758 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,580 reviews
Southwest
8.1
Very good
4,758 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Avelo Airlines
7.5
Good
74 reviews
Southwest
8.1
Very good
4,758 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
9,006 reviews
Southwest
8.1
Very good
4,758 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Related info for your journey

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

  • What airport do you fly from for flights from Ontario to San Francisco Bay Area?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to San Francisco Bay Area.

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

    Within the past month, 164 users have taken a look at flights from Ontario to San Francisco Bay Area.

  • What are the cheapest airlines to fly from Ontario to San Francisco Bay Area one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $34. United Airlines flights start at $59 while deals on Southwest start at $99 one-way.

  • What are the most popular routes from Ontario to San Francisco Bay Area?

    The most popular route from Ontario to San Francisco Bay Area is Ontario - San Francisco. You may also consider Ontario - San Jose or Ontario - Oakland.

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

    Consider Frontier (88%), Air Canada (77%) or United Airlines (77%) when booking your flight. These represent the most reliable airlines when flying from Ontario to San Francisco Bay Area.

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

    The cheapest flight price from Ontario to San Francisco Bay Area is $32. On average you can expect to pay $1,233. The most popular route, (Ontario - San Francisco), can usually be booked for $38.

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

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

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

    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 Bay Area.

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

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

  • What is the cheapest month to book a flight from Ontario to San Francisco Bay Area?

    Currently, January is the cheapest month in which you can book a flight from Ontario to San Francisco Bay Area (average of $276). Flying from Ontario to San Francisco Bay Area in June is currently the most expensive (average of $406). 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.

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Alternative routes for Ontario to San Francisco Bay Area

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Ontario to San Francisco Bay Area

Discover the top 9 airlines that operate flights from Ontario to San Francisco Bay Area. 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 2,558,603 searches. Data last updated December 25, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$26Average$86FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$31Average$93FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$45Average$306FlexibilityNo cancel feeOn-time75%
DeltaCheapest$50Average$200FlexibilityNo cancel feeOn-timeN/A
Avelo AirlinesCheapest$67Average$88FlexibilityNo cancel feeOn-timeN/A
Breeze AirwaysCheapest$73Average$139FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$132Average$263FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$180Average$276FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$246Average$454FlexibilityNo cancel feeOn-time71%
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