Direct (nonstop) flights from Houston to Denver
2 airlines fly nonstop from George Bush Intcntl Houston (IAH) to Denver International (DEN). It's 861 miles (1,385 km), about 2h 43m in the air. Operated by Frontier Airlines, United Airlines.
Frontier Airlines
United Airlines
Route data last updated: May 26, 2026
Airlines with non-stop flights
F9
Frontier Airlines
UA
United Airlines
Alternative Routes
Other ways to fly from Houston to Denver with one stop · direct emits 159 kg CO₂ per passenger
Looking for the return flight?
DEN → IAH: Flights from Denver to HoustonOther direct flights from Houston
Direct flights from Denver (DEN)
Frequently Asked Questions
How long is the direct flight from Houston to Denver?
A nonstop flight from Houston (IAH) to Denver (DEN) takes approximately 2 hours and 43 minutes. The distance is 861 miles (1,385 km).
Which airlines fly nonstop from Houston to Denver?
2 airlines: Frontier Airlines, United Airlines.
Is there a nonstop flight from Houston to Denver?
Yes. 2 airlines: Frontier Airlines, United Airlines.
How far is Houston from Denver?
The flight distance from Houston to Denver is 861 miles (1,385 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as London to Madrid.
What type of aircraft flies from Houston to Denver?
At 2h 43m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Houston to Denver?
Roughly 159 kg CO2 per passenger one-way. That's about the same as driving 795 km.
Is the return flight from Denver to Houston 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 Houston 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 George Bush Intcntl Houston for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.