How does Frontier return Bay Area routes?

Frontier Airlines is moving to restore service at Bay Area airports after routes were vacated when Spirit Airlines shut down operations.

Frontier’s latest push adds two western U.S. routes that were previously vacated by Spirit. The airline is aiming to “fill the void,” using the capacity gap created by Spirit’s exit to capture travelers who still want low-fare options.

What to watch as you plan

• Check whether your airport and destination are covered: Frontier is adding routes rather than replacing every Spirit route, so some markets may see new service while others won’t.
• Compare pricing and schedule: Route additions often come with promotional fares, but departure times can differ from the flights you used before.
• Confirm baggage and check-in rules: Budget carriers frequently have fare-dependent policies, and Frontier’s rules can differ from what Spirit flyers were used to.

Why it matters

Route reshuffles can change the “shape” of regional travel—who offers direct flights, how often flights run, and what the fare ceiling looks like. If you’re booking around the Bay Area in the near term, Frontier’s expansion could provide more departure choices and potentially better competition in some city pairs.

For the most accurate planning, match the announcement to your exact origin airport and target destination, then verify the flight schedule in the airline’s booking system.