Direct (nonstop) flights from Tucson to Denver
3 airlines fly nonstop from Tucson International (TUS) to Denver International (DEN). It's 638 miles (1,026 km), about 1h 58m in the air. Operated by Frontier Airlines, United Airlines, Southwest Airlines.
Frontier Airlines
United Airlines
Southwest Airlines
Route data last updated: May 30, 2026
Airlines with non-stop flights
F9
Frontier Airlines
UA
United Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Tucson to Denver with one stop · direct emits 118 kg CO₂ per passenger
Looking for the return flight?
DEN → TUS: Flights from Denver to TucsonOther direct flights from Tucson
Direct flights from Denver (DEN)
Frequently Asked Questions
How long is the direct flight from Tucson to Denver?
A nonstop flight from Tucson (TUS) to Denver (DEN) takes approximately 1 hours and 58 minutes. The distance is 638 miles (1,026 km).
Which airlines fly nonstop from Tucson to Denver?
3 airlines: Frontier Airlines, United Airlines, Southwest Airlines.
Is there a nonstop flight from Tucson to Denver?
Yes. 3 airlines: Frontier Airlines, United Airlines, Southwest Airlines.
How far is Tucson from Denver?
The flight distance from Tucson to Denver is 638 miles (1,026 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as the length of Italy.
What type of aircraft flies from Tucson to Denver?
At 1h 58m, this route typically uses narrow-body aircraft — Boeing 737 or Airbus A320. Varies by airline.
What is the carbon footprint of a flight from Tucson to Denver?
Roughly 118 kg CO2 per passenger one-way. That's about the same as driving 590 km.
Is the return flight from Denver to Tucson also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Tucson to Denver?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Tucson International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.