Domestic route
Cheap flights from Houston to Denver
George Bush Intercontinental Airport (IAH) to Denver International Airport (DEN). 862 miles, 2h 10m nonstop.
IAH to DEN at a glance
Computed from airline schedules and the fares we track for this route. Refreshed several times a day.
- Distance
- 862 milesgreat-circle
- Typical flight time
- 2h 10mnonstop, gate to gate
- Nonstop airlines
- UAWNNKF95 airlinesUnited, Southwest, Spirit
- Nonstop flights per day
- 25all airlines combined
- Cheapest month
- January 2027over the next six months
- Best day to fly
- Tuesday17% less than Sunday
- Time difference
- 1h behindDenver vs Houston
Houston to Denver
Round trips from $73
Per traveler, taxes and fees included. Lowest fare we found departs Tue, Jan 5.
Cheapest month: January 2027
See fares on these datesLock any fare free — pay only when you accept your last-minute deal
Or ask an agent on WhatsAppHouston to Denver fares by month
Lowest round-trip economy fare per traveler in each of the next six months, taxes and fees included. Select a month to search that date.
Airlines flying Houston to Denver
5 airlines fly nonstop with 25 departures a day combined, plus 1 more with one stop.
- UAUnited AirlinesStar AllianceNonstop · 11 flights a day · first checked bag from $40
- F9Frontier AirlinesLow-costNonstop · 4 flights a day · first checked bag from $55
- WNSouthwest AirlinesLow-costNonstop · 4 flights a day · first checked bag from $35
- NKSpirit AirlinesLow-costNonstop · 4 flights a day · first checked bag from $55
- SYSun Country AirlinesLow-costNonstop · 2 flights a day · first checked bag from $45
- AAAmerican AirlinesoneworldConnecting via DFW · first checked bag from $40
Connecting options
Hubs where one airline can carry you on both legs, most choices first.
- Dallas (DFW)AA1 airline
Which airport should I use?
Houston has 2 airports. Fares can differ by $50 to $150 round trip between them, so check the alternatives before you book.
Other departure airports near Houston
Tips for this route
- United, Southwest, Spirit and Frontier all fly IAH to DEN nonstop, so compare the total with bags before picking the lowest base fare: the difference between a basic and a standard economy ticket is often less than one checked bag each way.
- January 2027 is the cheapest month to fly over the next six months, with round trips from $73; September 2026 is the most expensive at $100 and up, a difference of $27 per traveler.
- Departing on a Tuesday averages 17% less than a Sunday on this route. If your dates are flexible, shift the outbound by a day or two and check the calendar view before you book.
- Fares on this route are usually lowest 4 to 8 weeks before departure and rise sharply inside two weeks.
Destination guide
Denver: Mile-high base camp for the Rockies
Denver International is the third-busiest airport in the country and a hub for United, Southwest and Frontier, which keeps fares low from every direction. The city itself is a lively base for the Rockies, with ski resorts 90 minutes away.
Best time to visit: June–September for hiking and Red Rocks concerts; December–March for skiing. Spring can swing from snow to 70°F in a week; September is dependably dry and golden.
Flying the other way? Denver to HoustonFares, airlines and tips for DEN to IAH.Ready to compare live fares?
See every airline on IAH–DEN side by side with bags and seat rules spelled out.
Search Houston to DenverHouston to Denver: common questions
How long is the flight from Houston to Denver?
A nonstop flight from Houston (IAH) to Denver (DEN) takes about 2h 10m gate to gate, covering 862 miles. Connecting itineraries add the layover, typically 1 to 3 hours more in total.
Which airlines fly nonstop from IAH to DEN?
United Airlines, Southwest Airlines, Spirit Airlines, Frontier Airlines and Sun Country Airlines operate nonstop flights from Houston (IAH) to Denver (DEN), with 25 nonstop departures a day between them. One-stop options connect through DFW.
What is the cheapest month to fly from Houston to Denver?
Over the next six months, January 2027 has the lowest round-trip fares from Houston (IAH) to Denver (DEN), starting at $73 per traveler including taxes and fees. Within any month, Tuesday departures average the lowest prices.
How far in advance should I book Houston to Denver flights?
Fares on this route are usually lowest 4 to 8 weeks before departure and rise sharply inside two weeks. Air1 Tickets includes free cancellation within 24 hours of booking on every fare, so you can lock in a good price and keep looking.
What is the time difference between Houston and Denver?
Denver is 1 hour behind Houston. IAH is on America/Chicago time and DEN on America/Denver time. Departure and arrival times in search results are always shown in local time at each airport.
Related routes
Other popular city pairs from the same departure city and to the same destination, with the lowest round-trip fares we found.