Houston (IAH) to Denver (DEN) is about 860 miles and typically takes 2 h 15 min by air. Some carriers have hubs at both ends, which makes frequent nonstops more likely. Call (800) 490-3234 for live fares.
IAH to DEN at a glance
| Route | Houston (IAH) to Denver (DEN) |
|---|---|
| Distance | about 860 miles / 1,390 km |
| Typical flight time | 2 h 15 min (estimate) |
| Time difference | 1 hours behind |
| Route type | Domestic (U.S.) |
| Airlines with hubs here | United Airlines and Southwest Airlines |
About the Houston to Denver route
Travelers between Houston and Denver typically choose between a nonstop flight and a one-stop routing through a hub, depending on price and schedule. The distance is about 860 miles.
Flight time and distance
A typical flight takes about 2 h 15 min gate to gate, with a realistic range of 2 h to 2 h 45 min depending on wind, routing and aircraft. That is an estimate based on the distance of roughly 860 miles (1,390 km), not a published schedule.
Denver is 1 hour behind Houston on standard time, so the arrival time on your ticket will look different from the flight duration.
Among the 200 routes in our guides, IAH to DEN is longer than about 25% of them.
For comparison, Houston to Chicago (IAH to ORD) is about 930 miles, so Denver is a bit closer away from IAH.
The airports
George Bush Intercontinental Airport (IAH)
Bush Intercontinental is United's gateway to Latin America and Texas. Full IAH guide.
Denver International Airport (DEN)
Denver is a United hub and one of Southwest's busiest airports, which gives travelers a wide choice of nonstops across the West and Midwest. Full DEN guide.
Other airports are worth a look: around Houston, Houston Hobby (HOU); and around Denver, Colorado Springs. Comparing them can change the price or the travel time to your final destination.
Airlines on this route
United Airlines has a hub at both ends, so it is the most likely to offer frequent nonstop service and easy rebooking on this route.
Southwest Airlines also has a major presence at one of the two airports.
Schedules change by season, and a nonstop that exists in summer may not operate in winter. Confirm the current options before you plan around a specific flight.
Common connection points
A one-stop trip would most naturally connect through a hub such as Southwest Airlines via Phoenix (PHX), which adds about 750 miles (87% beyond the direct distance) or United Airlines via Chicago (ORD), which adds about 950 miles (110% beyond the direct distance). Choose the connection with the best weather odds for your travel month and leave a comfortable layover; our layover guide explains how much time is realistic.
Best time to fly
Seasonal factors to weigh: at DEN, ski season brings holiday peaks, and spring snowstorms can cause sudden cancellations. At IAH, hurricane season from June to November can bring weather-related disruptions.
Ground transport
Getting to and from IAH
Metro buses and a flat-rate airport shuttle serve downtown; most visitors use rideshare or rental cars.
Getting to and from DEN
The A Line train reaches Union Station in about 37 minutes.
Booking tips
Denver is a leisure destination, so demand follows school holidays and peak travel seasons. Booking earlier for those dates usually helps, and the booking-timing guide explains the typical patterns.
Frequently asked questions
How long is the flight from Houston to Denver?
A typical IAH to DEN flight takes about 2 h 15 min, with a likely range of 2 h to 2 h 45 min. Actual time depends on wind, routing, aircraft and whether you connect.
How far is Denver from Houston by air?
The great-circle distance between IAH and DEN is about 860 miles (1,390 km).
Which airlines fly from Houston to Denver?
United Airlines and Southwest Airlines have a major presence at IAH or DEN, and service varies by season. Ask us to check current nonstop and connecting options.
What is the time difference between Houston and Denver?
Denver is 1 hour behind Houston on standard time. Daylight saving time can change the gap for part of the year.
Are there other airports near Houston?
Yes. Nearby alternatives include Houston Hobby (HOU). Comparing them can change both fare and travel time.
When is the best time to book IAH to DEN?
For leisure routes like this, book early for school holidays and peak seasons. Domestic fares are often competitive one to three months ahead, while international trips benefit from more lead time. Compare several dates, since fares are priced flight by flight.
Explore related routes
More flights involving Houston (IAH)
- Delhi to HoustonDEL to IAH
- Houston to ChicagoIAH to ORD
- Houston to Los AngelesIAH to LAX
- Houston to NewarkIAH to EWR
- Houston to San FranciscoIAH to SFO
- Houston to SeattleIAH to SEA
More flights involving Denver (DEN)
- Atlanta to DenverATL to DEN
- Austin to DenverAUS to DEN
- Baltimore to DenverBWI to DEN
- Chicago to DenverMDW to DEN
- Chicago to DenverORD to DEN
- Cleveland to DenverCLE to DEN
Last reviewed October 22, 2026. FlighTicketHub provides general information; confirm details with the airline before you travel.