United flights to San Francisco

We've compared every online travel agent and flight provider out there to find the cheapest United flight tickets to San Francisco. And with us, there are no added fees – what you see is what you pay.

At the moment, the best route to San Francisco with United is from Dublin to San Francisco.

The cheapest time to go to San Francisco with United is currently December.

If you're flexible on your departure dates, use Skyscanner's whole month tool to find the cheapest month, and even day to get flights to San Francisco with United.

We'll let you know when the price of your flight to San Francisco goes up or down so you can book when the time is just right. You're even able to watch specific United flights.

United might offer amendable tickets to San Francisco, which means you won't lose out if your booking has to be changed or cancelled.

Make sure you have the right travel insurance before flying to San Francisco. That way you can cover the costs of any unexpected events, such as delays or lost luggage.

To check whether there are any lower emissions flights available on your route, simply check the “only show flights with lower CO₂ emissions” box when you search for a flight with us.