Cheap Flights From San Francisco Intl. (SFO) To Los Angeles - Ontario Intl. (ONT)

Sometimes, a trip is all about the journey; other times, the magic is in the destination. But if you just want to get to where you’re going fast, multiple airlines operate direct flights from SFO to ONT, including United Airlines and Frontier Airlines.

You can take your pick from several airlines that fly direct between San Francisco and Ontario. United Airlines (UA) is one of the most popular. This carrier operates approximately 139 flights every month. Another good option is Frontier Airlines (F9), which has 17 flights every month. The more airlines you take into account, the more likely you are to walk away with a fantastic deal.

Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you’re looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you’re browsing flight deals.

Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.

Here’s the deal: It is typically possible to start comparing international airfares on Travelocity.ca 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 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.