$74 Cheap Frontier Airlines flights Denver (DEN) to San Antonio (SAT)

You can discover cheap round-trip Frontier Airlines flights from $143 from DEN to SAT by organizing your results from “Price (lowest to highest)” on Expedia. Or look for options from $74 for a one-way trip.**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 round-trip or one-way flights to San Antonio in January or September. You could find an affordable fare with Frontier Airlines during these off-season months.

Look for cheap Frontier Airlines flights from Denver Intl. Airport (DEN) to San Antonio Intl. Airport (SAT) one to three months ahead of your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and itinerary, the best day of the week to book a domestic flight is usually Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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.

Skip the layovers and fly from Denver Intl. Airport (DEN) to San Antonio Intl. Airport (SAT) on one of Frontier Airlines’s 4 direct weekly flights. Use our “Nonstop” and “Airline” filters to find the Frontier Airlines flight that’ll get you to SAT at a time that suits you.

It takes approximately 2h 19m to fly nonstop from Denver Intl. Airport (DEN) to San Antonio Intl. Airport (SAT) with Frontier Airlines.

The first flight from DEN to SAT with Frontier Airlines leaves at 8:43AM UTC-7. You’ll land at 12:02PM UTC-6. The final Frontier Airlines flight of the day leaves at 8:43AM UTC-7 and arrives at 12:02PM UTC-6. With 20% fewer cancellations for early and mid-morning flights, heading out early is typically the smartest option.**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.

Frontier Airlines flights from Denver Intl. Airport (DEN) to San Antonio come in to San Antonio Intl. Airport (SAT). This is the main entry point here.

A rewarding loyalty program and the ability to rack up points through Frontier Miles are the start of the reasons to leave from DEN to SAT with Frontier Airlines. Plus, when you sign up to Expedia’s free One Key™ program, you can receive OneKeyCash™* alongside Frontier Airlines’s loyalty program earnings. It’s yours to spend on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Frontier Airlines usually flies Airbus A321neo planes for flights from Denver Intl. Airport (DEN) to San Antonio Intl. Airport (SAT). This carrier also operates the Airbus A321 on this route. Remember that aircraft type can vary depending on operational requirements, so the plane you catch could be different on your travel date.

Depending on your ticket type, a fee typically applies if you cancel or change your booking more than 24 hours after it’s been confirmed. To secure flexible fares, select our “Changes included” or “No cancel fee” filter while looking for flights. For more details on canceling or modifying your reservation, head to “Trips,” select your flight and click on “Manage Booking.”