Book Cheap United flight from Ontario (ONT) to San Francisco (SFO) from CA $95

Find The Best Day to Book a Cheap United Flights From Ontario to San Francisco

Cheapest United Flights from Ontario (ONT) to San Francisco (SFO)

The cheapest flights to San Francisco Intl. found within the past 7 days were round trip and CA $95 one way. Prices and availability subject to change. Additional terms may apply.

Frequently asked questions

Can I catch a flight from Ontario Airport to San Francisco Airport right now?
It's always wise to learn about any quarantine requirements and travel advice reports in place in your destination. Ensure you check out our Covid-19 Travel Advisor for up-to-date info on flying to San Francisco Airport from Los Angeles - Ontario Intl. Airport (ONT).
What terminal is United Airlines at ONT?
If you're flying with United Airlines from ONT, you'll generally board from terminal 2. If you're heading to San Francisco Airport from here, you're likely to be arriving at terminal 3.
Are there United Airlines non-stop flights from ONT to SFO?
With United Airlines offering nonstop flights from Ontario Airport to San Francisco Intl. Airport (SFO), your next great adventure is just a flight away. Say goodbye to the hassle and baggage mix-ups that often come with stopovers, and lock in your seat today.
How long is a United Airlines flight from ONT to SFO?
No nasty jet lag, no backache — there's a lot to be said for short flights. If you're jetting off with United Airlines from Ontario Airport to San Francisco Airport, the plane ride will fly by in roughly 3 hours and 20 minutes.
What type of aircraft does United Airlines fly from ONT to SFO?
The Embraer 175 and the Bombardier CRJ are the two types of airplane most commonly used by United Airlines between ONT and SFO.
How many direct and indirect flights does United Airlines fly from ONT to SFO?
You can select from approximately 3 United Airlines flights daily from ONT to SFO.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to San Francisco Airport, please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Grab a great United flight from ONT to SFO 

To find a great deal on United flights with Travelocity, simply enter your origin and destination airports, pick your travel dates, and hit search. From here, you can sort by price, flight duration, and arrival/departure time. You can also filter to find nonstop flights. 

Flying United Los Angeles to San Francisco gives you 3 fights to choose from. With that direct flight time of 27, you’ll be touching down before you know it.  

 

Find cheap flights with United between Los Angeles and San Francisco 

United has a range of great fares on stacks of flights, and to find the most affordable for you, there are a few tricks you can try. Booking in advance, for example, is a great way to grab a fantastic deal. Also, choose the cheapest month, if you can. One-way flights from Los Angeles to San Francisco with United are November.  

The more flexible you are, the more affordable flights you’re likely to find. Consider one-way flights and connecting flights, as well as standard roundtrip and direct options. Even if you’re flying today, cheap last-minute flights are easy to find by entering your travel dates and hitting search.  

 

Reasons to book your United flights with Travelocity 

Travelocity makes it easy to book a seat, anywhere in the world. The vast inventory, fast search, and advanced filters put some of the best deals on the planet in one place. Whether you’re traveling on business, with friends, family, or on your own, take your pick from some fantastic options. And with free cancellation and pay later options, you can travel more and worry less.  

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to San Francisco

SFO El Rancho Inn SureStay Collection by Best Western

SFO El Rancho Inn SureStay Collection by Best Western

3 out of 5
1100 El Camino Real, Millbrae, CA
Book a stay at this business-friendly hotel in Millbrae. Enjoy free breakfast, an outdoor pool, and a 24-hour fitness center. Our guests praise the breakfast ...
8.2/10 Very Good! (2,829 reviews)
"All I needed was a bed overnight close to SFO airport. This was fine. Comfortable bed, clean room, I didn't ask for more and I didn't need more. Might've been a little disappointed if I was staying longer (the bathroom was extremely cramped, there was inconvenient construction making parking a ..."

Reviewed on Jul. 22, 2025

SFO El Rancho Inn SureStay Collection by Best Western
Crowne Plaza San Francisco Airport by IHG

Crowne Plaza San Francisco Airport by IHG

3.5 out of 5
1177 Airport Blvd, Burlingame, CA
Stay at this 3.5-star business-friendly hotel in Burlingame. Enjoy free WiFi, room service, and a fitness center. Our guests praise the helpful staff and the ...
7.6/10 Good! (1,949 reviews)
"Good spot"

Reviewed on Jul. 25, 2025

Crowne Plaza San Francisco Airport by IHG
The Dylan at SFO

The Dylan at SFO

3 out of 5
110 S El Camino Real, Millbrae, CA
Stay at this 3-star business-friendly hotel in Millbrae. Enjoy free WiFi, free parking, and breakfast (surcharge). Our guests praise the helpful staff and the ...
9/10 Wonderful! (1,706 reviews)
"I love this place. I have been staying there for at least 15 years. However, they are starting to get into the practice of nickel and diming for things that used to be standard. The last time I was there before my most recent srsy, they charged me $25 for checking in 20 minutes early. When I contacted ..."

Reviewed on Jul. 26, 2025

The Dylan at SFO
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.