Cheap Spirit Airlines flights Houston (IAH) to Denver (DEN)

You’ll discover affordable return Spirit Airlines flights from IAH to DEN by organizing your results from “Price (lowest to highest)” on Expedia. Or search for options 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 return or one-way flights to Denver in January or November. You could find lower fares with Spirit Airlines during these off-peak travel months.

Begin your search one to three months ahead of your departure date to find cheap fares on Spirit Airlines flights from George Bush Intercontinental Airport (IAH) to Denver Intl. Airport (DEN). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic flights.*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.

Select our “Nonstop” filter when browsing for direct Spirit Airlines flights from IAH to DEN. It’s also a good way to compare other airlines servicing the same nonstop trip.

To find the earliest departure from IAH to DEN with Spirit Airlines, filter your search by “Early Morning” and “Morning.” Choosing an early flight usually means you’re less likely to experience cancellations.**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.

Spirit Airlines flights from George Bush Intercontinental Airport (IAH) to Denver come in to Denver Intl. Airport (DEN). This is the main gateway here.

A rewarding loyalty program and the ability to collect points through Free Spirit are the start of the reasons to travel from IAH to DEN with Spirit Airlines. Plus, when you join our One Key™ program, you can earn OneKeyCash™* in addition to Spirit Airlines’s 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 time. For further details about modifying your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you want the freedom to change your itinerary without additional costs, tick the “No cancel fee” or “Changes included” filter when planning your trip.