Cheap Flights From San Francisco (SFO) | 2026 Deals, Routes & Tips

Finding Cheap Flights From San Francisco

San Francisco is served by San Francisco International Airport (SFO), a global mega-hub and one of the busiest airports in the United States. It offers an immense international network with flights to every continent, comprehensive domestic coverage, and is a major hub for United Airlines and a focus city for Alaska Airlines, creating a highly competitive market for fares.

The airport is a primary gateway to Asia and the Pacific, with extensive service to China, Japan, Korea, Australia, and Southeast Asia. It also offers strong transatlantic connections and flights across the Americas. Top domestic routes include Los Angeles, New York, Chicago, Seattle, and Denver. Key international destinations include London, Tokyo, Sydney, and Frankfurt.

San Francisco International is a major hub for United Airlines and a focus city for Alaska Airlines. It is served by all major U.S. and international carriers, including American, Delta, Southwest, British Airways, Lufthansa, and dozens of Asian airlines. Low-cost carriers like Frontier and Spirit also operate from SFO, adding budget options.

To find the cheapest flights, book international travel 3-6 months in advance. For domestic flights, book 3-6 weeks ahead. Use flight comparison tools aggressively. Flying on weekdays (Tuesday-Thursday) is significantly cheaper. SFO is a hotspot for competitive fares to Asia, Europe, and across the U.S. For the best deals to Asia, look for sales on United, ANA, and Chinese carriers. For domestic travel, Southwest and Alaska often provide good value. Consider nearby airports like Oakland (OAK) or San Jose (SJC) for potentially lower fares on certain routes.

Flight deals from San Francisco to Lihue, Hawaii | Secret Flying

September 12, 2026

Cheap Flights From San Francisco

Finding Cheap Flights From San Francisco

Non-stop from San Francisco to Lihue, Hawaii (& vice versa) for only $270 roundtrip

Non-stop from San Francisco to Kahului, Hawaii (& vice versa) for only $288 roundtrip

Non-stop from San Francisco to Singapore for only $277 one-way

Non-stop from San Francisco to Honolulu, Hawaii (& vice versa) for only $272 roundtrip

Non-stop from San Francisco to Portland, Oregon (& vice versa) for only $104 roundtrip

Non-stop from San Francisco to Seattle (& vice versa) for only $97 roundtrip

Non-stop from San Francisco to San Diego (& vice versa) for only $117 roundtrip

XMAS & NEW YEAR: San Francisco to Tahiti, French Polynesia for only $614 roundtrip