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Cheap Flights from Houston (IAH) to Denver (DEN)

Compare Houston George Bush Intercntl. to Denver International flight deals

Find the cheapest month or even day of the year to fly to Denver International

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Flight deals from Houston George Bush Intercntl. to Denver International

Looking for a cheap last-minute deal or the best return flight from Houston George Bush Intercntl. to Denver International? Find the lowest prices on one-way and return tickets right here.
Denver.$146 per passenger.Departing Sat, 16 Aug, returning Sat, 23 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Sat, 16 Aug, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sat, 23 Aug, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $146, select.
Denver.$150 per passenger.Departing Wed, 8 Oct, returning Tue, 14 Oct.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Wed, 8 Oct, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 14 Oct, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $150, select.
Denver.$150 per passenger.Departing Sat, 1 Nov, returning Tue, 4 Nov.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Sat, 1 Nov, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 4 Nov, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $150, select.
Denver.$150 per passenger.Departing Wed, 3 Sep, returning Mon, 8 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Wed, 3 Sep, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Mon, 8 Sep, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $150, select.
Denver.$177 per passenger.Departing Mon, 28 Jul, returning Mon, 4 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Mon, 28 Jul, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Mon, 4 Aug, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $177, select.
Denver.$180 per passenger.Departing Sun, 21 Sep, returning Wed, 1 Oct.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Sun, 21 Sep, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Wed, 1 Oct, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $180, select.
Denver.$182 per passenger.Departing Sat, 30 Aug, returning Wed, 3 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Sat, 30 Aug, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Wed, 3 Sep, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $182, select.
Denver.$204 per passenger.Departing Mon, 14 Jul, returning Tue, 22 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Mon, 14 Jul, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 22 Jul, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $204, select.

Find the cheapest month to fly from Houston George Bush Intercntl. to Denver International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Houston George Bush Intercntl. to Denver International flights are currently cheapest in August.
Jul
from $204
Aug
from $146
Sep
from $150
Oct
from $150
Nov
from $150
Dec
from $240
Jan
from $438
Feb
from $438
Mar
from $439
Apr
from $550
May
Find prices
Jun
Find prices

Direct flights from Houston George Bush Intercntl. to Denver International

Houston George Bush Intercntl. to Denver International: Alternative routes

Compare routes from Houston George Bush Intercntl. to Denver below. You may find an airport to fly into that's cheaper, faster, or easier than Denver International.

Houston to Denver: Flight information

The things to know before you go.
Cheapest flight found$146
Cheapest month to flyAugust
Average flight time2 hrs, 38 mins
Most popular airlineUnited
Average flights per week191

Finding cheap flights from Houston George Bush Intercntl. to Denver International: Frequently asked questions

The best price we found for a return flight from Houston George Bush Intercntl. to Denver International is $146. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 38 minutes is the average flight time from Houston George Bush Intercntl. to Denver International.
United, Air New Zealand and Air Canada fly direct from Houston George Bush Intercntl. to Denver International.
As of July 2025, there are 191 flights per week flying from Houston George Bush Intercntl. to Denver International.
The cheapest month to fly from Houston George Bush Intercntl. to Denver International is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Houston George Bush Intercntl. Airport to Denver International Airport on Saturday, 16 August 2025.
Yes – the average flight time is 2 hours and 38 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Denver International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Denver is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Denver International.

Travelling from George Bush Intercontinental Airport (IAH) to Denver International Airport (DEN): what you need to know

  • Around 2 hours 35 minutes is how long you can expect to be in the air on a direct flight from George Bush Intercontinental Airport to Denver International Airport.

  • The timezone in Denver is UTC-6, which is one hour behind Houston.

  • Flights from IAH to DEN start at 05:00 — the earliest with United Airlines. The last departure is at 23:13 with Frontier Airlines. Overall, you can take your pick of 118 weekly George Bush Intercontinental Airport to Denver International Airport flights.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Get to the airport on time to catch your IAH to DEN flight.

  • During popular months such as July, it's a good idea to get to the airport earlier than usual. Plan to arrive two hours before domestic departures and four hours ahead of an international flight whenever you're travelling during a high season in general.

  • With direct flights from George Bush Intercontinental Airport to Denver International Airport available through a range of airlines, getting to Denver (and then other destinations in United States) is a breeze. You can fly nonstop with:

  • Most passengers choose to fly with Frontier Airlines on this route.

  • United Airlines is the most punctual carrier operating IAH to DEN flights. An impressive 82.13% of its departures on this route land as scheduled.

  • Think about adding a stopover when booking your ticket from George Bush Intercontinental Airport to Denver International Airport. Simply deselect 'Direct flights only' to break up your journey, or enjoy a detour to a new and interesting place. Check out these options between IAH and DEN:

    • Tulsa International Airport

    • San Antonio International Airport

    • Will Rogers World Airport

How to find the cheapest flights from George Bush Intercontinental Airport (IAH) to Denver International Airport (DEN)

  • The lowest price we've found for a one-way George Bush Intercontinental Airport to Denver International Airport flight is $68. A round-trip ticket right now is $146. Depending on the availability and when you book, these fares may change.

  • Get cheap tickets from IAH to DEN by booking at least six months ahead. Based on our research, that's the sweet spot for finding a bargain.

  • Plan your trip for May. That's the cheapest month for flights from George Bush Intercontinental Airport to Denver International Airport. If you're flexible with your dates, try out the 'Whole month' tool to find the cheapest price across each month.

  • Landing cheap flights from IAH to DEN is a piece of cake with Price Alerts. All you need to do is set up one of these automatic alerts and we'll get in touch as soon as there's a better deal.

  • Find the perfect flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from George Bush Intercontinental Airport to Denver International Airport, use the 'Sort by' tool. You can also filter results by airline, departure and arrival times, and journey duration.

Handy information about George Bush Intercontinental Airport (IAH)

Arriving at Denver International Airport (DEN)

  • Consider staying at Baymont by Wyndham Denver International Airport after arriving from your George Bush Intercontinental Airport to Denver International Airport flight. It's a quick drive from DEN and a handy option if you want to freshen up right away.

  • Pick up a Denver International Airport rental car and discover Denver and beyond with your own set of wheels. Routes Car Rentals, Dollar and Budget are top providers you can book with here.

  • Lock in the best deal by reserving your ride from Denver International Airport around one week ahead of your departure.

Getting from Denver International Airport (DEN) to central Denver

  • DEN is located at 8500 Pena Boulevard.

  • Denver International Airport to central Denver has a drive time of about 35 minutes. It's approximately 40 kilometres away.

  • It typically takes 1 hour 30 minutes to get there by public transport.

When to fly to Denver International Airport (DEN)

  • The quietest month for a flight from George Bush Intercontinental Airport to Denver International Airport is April, while July is the busiest. Choose the best time to visit Denver based on whether you prefer a faster pace or a more relaxed vibe.

  • Book your flight from George Bush Intercontinental Airport to Denver International Airport for July if you'd like to go to Denver during its warmest month. Expect temperatures of between 14ºC (57ºF) and 32ºC (90ºF).

  • January sees average temperatures of between -9ºC (16ºF) and 7ºC (45ºF). Look for cheap tickets from IAH to DEN sometime around then if you like cooler conditions.

Explore more of United States

  • Denver has loads to offer, but there are so many other parts of United States just waiting to be discovered. Around 105 kilometres south of Denver, a trip to Colorado Springs will keep your itinerary packed. Don't miss top attractions like US Northern Command (USNORTHCOM) / North American Aerospace Defence Command (NORAD) Headquarters, Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA).

  • Aurora is another must-experience destination in United States and is around 13 kilometres east of Denver. No trip is complete without visiting Magellan's Travel Solutions and Gear, The Fairways at Lowry and Retired Enlisted Association Inc.

Plan the rest of your trip from Houston to Denver

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.