$110 Cheap Frontier Airlines flights Seattle (SEA) to San Antonio (SAT)

Scoring cheap one-way Frontier Airlines flights from SEA to SAT from $110 on Expedia is simple — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly round-trip fares from $183 for your next getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Browse for return or one-way flights to San Antonio in January or September. You could find a cheap fare with Frontier Airlines during these off-peak months.

To find cheap Frontier Airlines fares from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the cost. Sunday is typically the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Enter your dates, hit search and check the “Nonstop” filter on Expedia to find any direct flights from SEA to SAT with Frontier Airlines or other airlines.

Sort your results by “Morning” and “Early Morning” to see the earliest flights from SEA to SAT. Setting off early means flight cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

San Antonio Intl. Airport (SAT) is the main San Antonio hub for Frontier Airlines flights from Seattle - Tacoma Intl. Airport (SEA).

A rewarding loyalty program and the chance to rack up points through Frontier Miles are the start of the reasons to jet off from SEA to SAT with Frontier Airlines. Plus, when you sign up to our One Key™ program, you can earn OneKeyCash™* alongside any airline loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are generally free within 24 hours of booking, but your airline may charge you after that. For more details about modifying your flights, go to your “Trips,” select your flight and click on “Manage Booking.” If you want the freedom to make changes without additional charges, check the “Changes included” or “No cancel fee” filter when planning your trip.