Ontario

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

SFO — ONT
Jun 17 — Jun 241
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Find flight deals from San Francisco Bay Area to Ontario

Keep the following information in mind while searching for San Francisco Bay Area to Ontario flight deals. Data was last updated May 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$94
(Super.com)

One-way from

$54
(CheapOair)

Popular in

March

Cheapest in

August

Average price

$205
Provider with most accurate pricing for San Francisco-Los Angeles flight deals.
Provider most trusted by Cheapflights users for San Francisco-Los Angeles flights.
From San Francisco Bay Area to Ontario
One-way flight from San Francisco Bay Area to Ontario
Highest demand for flights based on searches. 14% potential increase in price ($34 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Average for round-trip flights in May 2026

Cheapflights Insights

Everything you need to know about your flight from San Francisco Bay Area to Ontario

How far ahead should I book a flight from San Francisco Bay Area to Ontario?

The best time to book flights from San Francisco Bay Area to Ontario is 77 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from San Francisco Bay Area to Ontario (average of $19). Flying from San Francisco Bay Area to Ontario in February is currently the most expensive (average of $139). 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 XIH to ONT?

Find hourly flight availability from San Francisco Bay Area to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 18, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 25% on flights from San Francisco Bay Area to Ontario by exploring options for tickets in the evening.

What is the cheapest day to fly from San Francisco Bay Area to Ontario?

Use this chart to determine the cheapest time to fly round-trip from San Francisco Bay Area to Ontario. Price data was last updated on May 16, 2026.

Travelers seeking maximum savings on their San Francisco Bay Area to Ontario flight should consider departing on Sunday mornings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated May 18, 2026.
Read reviews from past customers who have flown Alaska Airlines,Southwest, andUnited Airlines from San Francisco Bay Area to Ontario. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.5

Food

7.0

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.

Crew

8.5

Food

7.0

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.

Crew

8.5

Food

7.0

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.

Crew

8.5

Food

7.0

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.

Crew

8.5

Food

7.0

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.

Crew

8.5

Food

7.0

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.

Related info for your journey

Find useful and relevant information for your journey from San Francisco Bay Area to Ontario. 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 into for flights to Ontario from San Francisco Bay Area?

    Ontario (ONT) is the airport you will fly into if you book a flight from San Francisco Bay Area to Ontario. It is only a 3.1 mi journey from Ontario (ONT) to Ontario’s city center.

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

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

    A quick flight from San Francisco Bay Area to Ontario can take about 1h 20m. Frontier provides one of the quickest options available for as low as $147. Airlines will cover a distance of 333 mi. Generally, flights for this route are nonstop.

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

    One-way options have recently been found by users for as low as $33 on Frontier. Other airlines that offer cheap prices include United Airlines from $38 and Southwest from $48 one-way.

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

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

    Before booking your flight to Ontario from San Francisco Bay Area, check out the most reliable airlines to get you to your destination on time: SkyWest Airlines (100%), United Airlines (92%), Emirates( 92%).

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

    On average you can expect to pay $158 for a flight from San Francisco Bay Area to Ontario. The cheapest flight overall is $49 while the most popular route, (San Francisco - Ontario) is currently priced at $71.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco Bay Area to Ontario 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 San Francisco Bay Area to Ontario?

    Currently, January is the cheapest month in which you can book a flight from San Francisco Bay Area to Ontario (average of $19). Flying from San Francisco Bay Area to Ontario in February is currently the most expensive (average of $139). 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.

See more FAQs

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Alternative routes for San Francisco Bay Area to Ontario

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

Top 6 airlines flying from San Francisco Bay Area to Ontario

Discover the top 6 airlines that operate flights from San Francisco Bay Area to Ontario. 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 May 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$39Average$149FlexibilityNo cancel feeOn-time62%
DeltaCheapest$66Average$245FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$68Average$192FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$107Average$227FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$124Average$273FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$186Average$274FlexibilityNo cancel feeOn-time71%

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