Cheap flights from Ontario to San Francisco Bay Area from $49
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to San Francisco Bay Area departing on 8/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Frontier flights from Ontario to San Francisco Bay Area
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United Airlines flights from Ontario to San Francisco Bay Area
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How to get the cheapest flight ticket from Ontario to San Francisco Bay Area
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to San Francisco Bay Area?
In general, May is the cheapest month to fly from Ontario to San Francisco Bay Area. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $89. If you aren’t able to travel to San Francisco Bay Area during the month of May, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $90.
What is the cheapest day to depart on your flight to San Francisco Bay Area?
On average, the least expensive day to fly to San Francisco Bay Area from Ontario is on a Friday. momondo users have found tickets for Friday departures for as low as $136. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $289.
What is the cheapest time of day to depart on your flight to San Francisco Bay Area?
Our most recent data shows that the best time of day to fly to San Francisco Bay Area is in the evening. Flights from Ontario to San Francisco Bay Area during this time can be as low as $100. In contrast, the most expensive time of day to depart to San Francisco Bay Area is at noon when prices are around $304.
What is the cheapest Ontario to San Francisco Bay Area flight route?
Fly from Ontario to San Francisco for the best Ontario - San Francisco Bay Area flight prices
How far in advance should I book a flight to San Francisco Bay Area?
You are more likely to see cheaper flights to San Francisco Bay Area from Ontario when booking 14 weeks ahead of your departure date. In general, you can expect to find flights to San Francisco Bay Area for around $111 when searching 14 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco Bay Area from Ontario for as low as $85 on momondo.
What cabin class options are available on Ontario to San Francisco Bay Area flights?
There are 4 cabin classes available to choose from on Ontario to San Francisco Bay Area flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Ontario to San Francisco Bay Area?
Southwest, Frontier, and United Airlines are the most popular carriers operating from Ontario to San Francisco Bay Area
What airlines fly to San Francisco Bay Area?
Frontier, United Airlines and Alaska Airlines are the top three most popular airlines that fly to San Francisco Bay Area from Ontario according to our data. Frontier is the first choice among our users, with 38% of people opting to fly with this airline when traveling to San Francisco Bay Area. Keep in mind that there are 11 different airlines that fly to San Francisco Bay Area on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ontario to San Francisco Bay Area on average per day?
The number of flights available between Ontario and San Francisco Bay Area is 12 per day as of June 2025. The most frequent departure time is 6:00PM, with 39% of daily flights leaving in the evening.
How many flights depart from Ontario to San Francisco Bay Area on average per week?
The number of flights available between Ontario and San Francisco Bay Area is 84 per week as of June 2025. The most frequent departure day is Wed, with 20% of weekly flights leaving on this day.
Cheap Ontario to San Francisco Bay Area flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to San Francisco Bay Area
Best Price Found | $49 |
|---|---|
Fastest flight time | 1h 10m |
Direct flights | Every day |
Airports in San Francisco Bay Area | 3 airports |
When did momondo last update prices for flights from Ontario Airport to San Francisco Bay Area?
Prices for flights from Ontario Airport to San Francisco Bay Area are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario Airport to San Francisco Bay Area?
There are 8 operators available for flights from Ontario Airport to San Francisco Bay Area as of June 2025.
How old do you have to be to fly from Ontario Airport to San Francisco Bay Area?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to San Francisco Bay Area.
What documentation or ID do you need to fly to San Francisco Bay Area?
The necessary travel and health documents for your San Francisco Bay Area trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Ontario to San Francisco Bay Area?
Based on momondo bookings for flights between Ontario and San Francisco Bay Area, the leading plane model is Airbus A320neo, making up 17.92% of the total bookings. Other popular models include Airbus A321neo with 11.27%, Boeing 737 MAX 8 with 9.30%, and Boeing 737-800 Passenger/BBJ2 (winglets) with 8.78%.
Best airlines flying from Ontario to San Francisco Bay Area
Compare and see reviews for airlines that fly from Ontario to San Francisco Bay Area with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $30 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $36 | Free Cancellation | Rating 6.3 8,052 reviews | |||
| PriceFrom $58 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $67 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $67 | Free Cancellation | Rating 7.5 75 reviews | |||
| PriceFrom $85 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $113 | Free Cancellation | Rating 8.0 4,287 reviews | |||
| PriceFrom $232 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to San Francisco Bay Area?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Francisco Bay Area from Ontario.
Can I find flights from Ontario to San Francisco Bay Area with flexible booking policies on momondo?
All flight searches from Ontario to San Francisco Bay Area on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Ontario to San Francisco Bay Area?
momondo helps you find the best flight between Ontario and San Francisco Bay Area by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Ontario to San Francisco Bay Area right now. Can momondo alert me if prices change?
If you are simply researching potential flights to San Francisco Bay Area, momondo offers a useful price alert feature which will track prices for flights to San Francisco Bay Area from Ontario and alert you when they change.