Cheap flights from Chicago-O'Hare to San Francisco
Cheap return flights from Chicago-O'Hare to San Francisco
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
San Francisco flight facts
What you need to know
What are the cheapest airlines?
- Spirit Airlines
- Frontier Airlines
- Alaska Airlines
These airlines usually offer the cheapest flights from Chicago-O'Hare to San Francisco.
What airlines fly indirectly?
- American Airlines
- United Airlines
- Delta Air Lines
These airlines fly from Chicago-O'Hare to San Francisco, but you’ll have at least one layover.
How long is the flight?
4 hours 30 minutes
This is the shortest flight time from Chicago-O'Hare to San Francisco.
Alternative flights from the UK to San Francisco
Check out prices for other routes
Alternative flights from Chicago-O'Hare
You might find cheaper flights nearby
Today alone, Netflights has searched over five flights. 05 / Feb / 2026 is currently the lowest priced day of the year to fly the Chicago-O'Hare/San Francisco route. There are around 35 flights on any given week from the UK to San Francisco and the cheapest month to fly right now is February. Not suitable? Try running another search or viewing all cheap flight deals.
How to get cheap flights from Chicago-O'Hare to San Francisco
Tips and advice from our flight experts
You've searched for flights from Chicago-O'Hare to San Francisco. We've found 25 flights and compared them to give you the best offer. Spirit Airlines is, on average, the cheapest for this route. Look out for them! The cheapest offer we've found is a one-way ticket for the route from Chicago-O'Hare to San Francisco on 05/04/2026 at 13:30 for £88.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 15 airlines that operate the 2975 km flight from Chicago-O'Hare to San Francisco.
To find the best offers, consider booking at least 2-3 months in advance or look for last-minute deals. The best time to fly is during the off-peak season. Spirit Airlines is a popular choice for budget travelers, and the average flight duration is about 4 hours 30 minutes. After selecting an offer, fill out your information and proceed to payment. Don't forget to check our flight + hotel service to book everything at once, saving you time and money!
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