Cheap Flights From O'Hare Intl. (ORD) To San Francisco Intl. (SFO)

Your next incredible adventure is on the other side of a single flight. You can travel direct from O’Hare Intl. Airport (ORD) to San Francisco Airport with multiple airlines, including United Airlines and American Airlines.

If you’re planning a trip to San Francisco from Chicago, there are several airlines advertising direct flights. One of the most well-known is United Airlines (UA), which operates 243 flights on this route every month. A popular alternative is American Airlines (AA), which has 126 flights each month. The more airlines you take into account, the more likely you are to score a sensational 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.