Flights to San Francisco: Top Airlines & Budget-Friendly Options! Looking for the best flights to San Francisco, USA without overspending? Whether you're traveling for business, leisure, or a weekend getaway, finding the right airline at the best price is key. San Francisco International Airport (SFO) is a major hub, offering flights from top airlines such as Delta, American Airlines, United, Southwest, and JetBlue. Budget-conscious travelers can also find great deals with low-cost carriers like Frontier and Spirit Airlines. https://www.bookofare.com/flights-to-san-francisco.aspx