Roundtrip Nonstop Ontario CA to San Francisco Airfares on United Airlines

No special codes or coupons are required. Get these roundtrip nonstop airfares while they last.

This roundtrip basic economy fare includes a personal item only, with no seat selection or carry-on bag. If traveling with children, you will be seated together according to United Airlines policy.

Travel Availability

• Departing Ontario (ONT): October 9, 11, 14-16, 18, 20-23, 25, 29-30; November 1, 4-5, 9, 12-13, 15-16, 18-19; December 4-6, 9-10, 14-17
• Departing San Francisco (SFO): October 11, 13-15, 18, 20-22, 25, 27-28; November 1, 3-5, 8-12, 15-19; December 6, 8-10, 13-17