$99 Cheap United flights Tucson (TUS) to Denver (DEN)

Scoring cheap one-way United Airlines flights from TUS to DEN from $99 on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly return fares from $161 for your next exciting 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.

January is one of the most affordable months to jet away to Denver with United Airlines. You could also find excellent prices on return and one-way fares in November.

Look for cheap United Airlines flights from Tucson Intl. Airport (TUS) to Denver Intl. Airport (DEN) one to three months before 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. No matter the fare type and itinerary, the best day of the week to book a domestic flight is generally Sunday and the most expensive tends to be 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.

Hop on one of United Airlines’s 35 direct weekly flights from Tucson Intl. Airport (TUS) to Denver Intl. Airport (DEN). To see your options, enter your origin, destination and dates and hit search. Next, apply the “Nonstop” and “Airline” filters.

From takeoff to arrival, a nonstop United Airlines flight from Tucson Intl. Airport (TUS) to Denver Intl. Airport (DEN) takes approximately 2h 4m.

Sunday has the most United Airlines flights from Tucson Intl. Airport (TUS) to Denver Intl. Airport (DEN). With 5 daily departures, this is the best day to find something that will suit your plans.

The earliest United Airlines flight from TUS to DEN departs at 6:58AM UTC-7, arriving at 8:57AM UTC-7. If you’d like to head off later in the day, the last United Airlines flight leaves TUS at 5:41PM UTC-7 and lands at DEN at 7:40PM UTC-7. Flying before noon is generally a good idea as morning flights are least 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.

United Airlines flights from Tucson Intl. Airport (TUS) to Denver come in to land at Denver Intl. Airport (DEN). This is the main entry point to this city.

A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to travel from TUS to DEN with United Airlines. Plus, when you sign up to our One Key™ program, you can receive OneKeyCash™* on top of United Airlines’s loyalty program earnings. It’s yours to use wherever your next trip takes you.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely be onboard an Embraer 175 or a Boeing 737 MAX 8 when flying United Airlines from Tucson Intl. Airport (TUS) to Denver Intl. Airport (DEN). However, keep in mind that a different plane may be assigned depending on operational requirements.

It’s usually possible to change or cancel your flight, although there may be additional charges if your booking was made over 24 hours ago. Prefer to keep your options open? Apply the “No cancel fee” or “Changes included” filter to find flights that won’t charge extra if you need to revise your plans. To make modifications, go to “Trips,” select your flight and click on “Manage Booking” for more details.