$109 Cheap Delta flights Denver (DEN) to Houston (IAH)

Apply the “Price (lowest to highest)” filter on Expedia to find cheap Delta Air Lines round-trip flights from $191 from DEN to IAH. Affordable one-way tickets from $109 are also available.**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 Houston in November or February. You could find an affordable fare with Delta Air Lines during these quieter months.

Search for cheap Delta Air Lines flights from Denver Intl. Airport (DEN) to George Bush Intercontinental Airport (IAH) one to three months before your day of 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 journey, the best day to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book 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.

To figure out if there’s a direct route from DEN to IAH with Delta Air Lines or any other carriers, check the “Nonstop” filter when searching for tickets.

To find the earliest departure from DEN to IAH with Delta Air Lines, filter your results by “Morning” and “Early Morning.” Choosing an early flight generally means 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.

George Bush Intercontinental Airport (IAH) is the main Houston gateway for Delta Air Lines flights from Denver Intl. Airport (DEN).

With an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is a popular option for many travelers flying from DEN to IAH. What’s more, if you’re a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be used on future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to change or cancel your flight, although there may be a charge if your booking was made over 24 hours ago. Want to keep your options open? Make use of our “Changes included” and “No cancel fee” filters to find flights that won’t penalize you if you need to revise your plans. To modify your itinerary, go to “Trips,” select your flight and click on “Manage Booking” for more information.