* All fares below were last found on: Oct 15, 2018 and 10:20:12 AM.
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One of the most romantic cities in the world, a trip to San Francisco will sweep you off your feet. Enjoy the romantic ambiance of the city. Soak up the rich cultural life. Enjoy world class shopping and dining. Be part of the colorful nightlife. San Francisco has everything a vacationer would ask. With so much to offer, it’s not a wonder why San Francisco lures thousands of vacationers every year to indulge in a vacation like none. Book cheap San Francisco flights on OneTravel and save. Get great discounts on top airlines including American Airlines, Frontier Airlines and United Airlines. The average flight time from Denver CO to San Francisco, CA, is around two hours.