Beginning of main content
Trip Type
Flight 1
Flight 2
Flight 3
Flight 4
Flight 5
Due to coronavirus (COVID-19) travel advisories, some destinations may be unavailable for certain dates. Find out more.

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights


Amazing United ONT to SFO Flight Deals

The cheapest flights to San Francisco Intl. found within the past 7 days were $193 round trip and $157 one way. Prices and availability subject to change. Additional terms may apply.



FAQs about United Airlines Flights from ONT to SFO

What terminal is United Airlines at Ontario, CA (ONT-Los Angeles - Ontario Intl.)?

If you're flying with United Airlines from Ontario, CA (ONT-Los Angeles - Ontario Intl.), you'll generally board from terminal 2. If you're traveling to San Francisco, CA (SFO-San Francisco Intl.) from here, you'll probably be pulling in at terminal 3.

Are there United Airlines non-stop flights from ONT to SFO?

With United Airlines offering direct flights between Ontario, CA (ONT-Los Angeles - Ontario Intl.) and San Francisco, CA (SFO-San Francisco Intl.), your next inspiring adventure is a plane ride away. Kiss goodbye to the stress, inconvenience and luggage mix-ups often associated with stopovers, and reserve your seat today.

How long is an United Airlines flight from ONT to SFO?

If the weather's good and things run smoothly, your United Airlines flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Francisco, CA (SFO-San Francisco Intl.) should take approximately 3 hours and 29 minutes. Make use of that short journey to check the details on your travel schedule before the wheels hit the tarmac.

What type of aircraft does United Airlines fly from ONT to SFO?

United Airlines usually uses the Bombardier CRJ or the Airbus A319 on the flight path between Ontario, CA (ONT-Los Angeles - Ontario Intl.) and San Francisco, CA (SFO-San Francisco Intl.).

How many direct and indirect flights does United Airlines fly from ONT to SFO?

United Airlines is currently operating no fewer than 3 flights each day from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Francisco, CA (SFO-San Francisco Intl.).

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, CA (SFO-San Francisco Intl.), please visit our Customer Service Portal.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Tuesdays tend to be the cheapest, according to flight demand on Travelocity in 2019. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Monday, as data shows the start of the week 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 2019, flights departing on a Tuesday 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 2019 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 1-2 weeks prior to their travel dates.

How can I save money on airline tickets?

We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2019 saved nearly 50% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2019. Savings are subject to change based on departure location, date and destination.

Carrier Flight Depart ONT Arrive SFO Fri
2/26
Sat
2/27
Sun
2/28
Mon
3/1
Tue
3/2
Wed
3/3
Thu
3/4
Stops
UA 5572 06:10 am 07:42 am Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 5416 10:38 am 12:10 pm Check fare Check fare Check fare Check fare - - Check fare 0 stop(s)
UA 4760 03:45 pm 05:13 pm Check fare Check fare Check fare Check fare Check fare - - 0 stop(s)
UA 5338 03:45 pm 05:13 pm - - - - - Check fare Check fare 0 stop(s)

Travelers ❤️ These 🏨

SFO Airport Hotel, El Rancho Inn BW Signature Collection
SFO Airport Hotel, El Rancho Inn BW Signature Collection
3.0 out of 5.0 1100 El Camino Real, Millbrae, CA
$73
4.0/5 (35 reviews)

Great service at front desk, very clean and social distant

Reviewed on Aug 4, 2020
This motel features a restaurant, an outdoor pool, and a bar/lounge. Traveling for business? Take advantage of the free WiFi in public areas, laundry service, ...
The Westin San Francisco Airport
The Westin San Francisco Airport
4.0 out of 5.0 1 Old Bayshore Hwy, Millbrae, CA
$98
4.2/5 (20 reviews)

The staff was very kind. The cheese and wine reception from 5-6 was a nice surprise.

Reviewed on Jan 5, 2020
This hotel features an indoor pool, a 24-hour fitness center, and a restaurant. Traveling on business? Take advantage of the 6 conference rooms, 24-hour business ...
Grand Hyatt at SFO
Grand Hyatt at SFO
4.0 out of 5.0 55 S McDonnell Rd, San Francisco, CA
$189
4.9/5 (11 reviews)

Great experience, staff went above and beyond and even sent up champagne when they found out we’d just gotten married that night.

Reviewed on Oct 20, 2020
This hotel features a restaurant, a 24-hour fitness center, and a bar/lounge. Traveling on business? Take advantage of the free WiFi in public areas, laundry ...

*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.