Cheap Flights To San Diego (SAN) | 2026 Deals, Routes & Tips

Finding Cheap Flights To San Diego

San Diego is served by San Diego International Airport (SAN), the busiest single-runway commercial airport in the United States and a major gateway for Southern California. It offers an extensive domestic arrival network with strong connections from the West Coast, Southwest, and major hubs across the country, supported by intense competition from both network and low-cost carriers flying into SAN.

The airport provides excellent connectivity from California cities, the Pacific Northwest, Texas, the Midwest, and the East Coast. Key arrival points include from San Francisco (SFO), Los Angeles (LAX), Seattle (SEA), Denver (DEN), Dallas (DFW), Chicago (ORD), and New York (JFK) into SAN. It also receives a growing number of international arrivals from Mexico, Canada, and seasonal service from Europe and Japan.

San Diego International is a focus city for Southwest Airlines and Alaska Airlines for inbound flights. It is served by all major U.S. carriers (American, Delta, United, JetBlue) and low-cost carriers Frontier and Spirit flying into SAN. International carriers like British Airways, Japan Airlines, and Aeroméxico operate arrivals into San Diego. This high level of competition helps keep fares in check for inbound travel.

To secure cheap flights to San Diego, book domestic arrivals 3-6 weeks in advance. For international arrivals into SAN, book 2-5 months ahead. Use flight comparison tools and set price alerts. Flying on weekdays (Tuesday-Thursday) into San Diego is significantly cheaper. SAN is known for competitive fares from the Bay Area, Pacific Northwest, and Texas. For the best deals into SAN, check Southwest and Alaska for West Coast value, and Frontier/Spirit for low base fares (plus fees). British Airways and Japan Airlines occasionally have good deals on long-haul arrivals into San Diego.