Frontier has round-trip flights from Houston (IAH) to Denver (DEN) for $58-$62, NONSTOP. Flights December to February. Weekends available. Origin/Destination reversible. No Christmas dates available.
Category: <span>Denver</span>
Image Credits: Larry Johnson, Creative Commons 2.0
Image Credits: Larry Johnson, Creative Commons 2.0
[07/25/2025 @ 4:55 PM CT] Deal is back on. Expect it to fluctuate at the whim of the airline, on/off whenever.
Frontier has round-trip flights from Houston (IAH) to Denver (DEN) for $60-$70, NONSTOP. Flights August to November. Weekends available. No Thanksgiving dates.
Frontier deals are usually limited in availability and sell out quickly.
Image Credits: Larry Johnson, Creative Commons 2.0
Southwest and United have round-trip flights from Houston (HOU/IAH) to Denver (DEN) for $135, NONSTOP. Flights May to November. Departures on Tuesday, Wednesday, and Saturday. Extended weekends available. Origin/Destination reversible. No Thanksgiving dates.
Image Credits: Larry Johnson, Creative Commons 2.0
Frontier has round-trip flights from Houston (IAH) to Denver or Orlando (DEN, MCO) for $58, NONSTOP. Flights March to June. Departures on Tuesday, Wednesday, and Saturday. Extended weekends available. Origin/Destination reversible.
Image Credits: Larry Johnson, Creative Commons 2.0
United has round-trip flights from Houston (IAH) to Denver (DEN) for $131, NONSTOP. Flights November to December. Very few extended weekends available. Holiday blackouts.
United’s “Basic Economy” fares do not allow for a free carry-on bag. Only a personal item (like a small laptop bag) is free. Seats are randomly assigned for free prior to boarding.
The personal item size on United is smaller (9 x 10 x 17 inches) than Frontier or Spirit (8 x 13 x 18 inches).
Image Credits: Larry Johnson, Creative Commons 2.0
Southwest has round-trip flights from Houston (HOU) to Denver (DEN) for $122, NONSTOP. Flights August to November. Departures on Tuesday, Wednesday, and Saturday. Origin/Destination reversible. 7-day minimum stay required. No Thanksgiving dates.
Image Credits: Larry Johnson, Creative Commons 2.0
United has round-trip flights from Houston (IAH) to Denver (DEN) for $137, NONSTOP. Flights August to November. Departures on Tuesday, Wednesday, and Saturday. Extended weekends available. Origin/Destination reversible. No Thanksgiving dates.
United’s “Basic Economy” fares do not allow for a free carry-on bag. Only a personal item (like a small laptop bag) is free. Seats are randomly assigned for free prior to boarding.
Image Credits: Larry Johnson, Creative Commons 2.0
Frontier has round-trip flights from Houston (IAH/HOU) to Denver (DEN) for $48-$58, NONSTOP. Flights April to May. Extended weekends available. Origin/Destination reversible.
Image Credits: Larry Johnson, Creative Commons 2.0
United has round-trip flights from Houston (IAH) to Denver (DEN) for $131-$147, NONSTOP. Flights February to May. Departures on Monday, Tuesday, Wednesday, Thursday, and Saturday. Extended weekends available. Origin/Destination reversible.
Southwest has competitive fares if you add the “SAVENOW” coupon-code. Keep in mind that while the coupon code at Southwest says 50% off, the base fares are about 50% higher than these. So once you do the math the Southwest fares are more expensive. You do get better bag allowance however.
Image Credits: Larry Johnson, Creative Commons 2.0
United has round-trip flights from Houston (IAH) to Denver (DEN) for $156, NONSTOP. Flights September to February. Weekends available. Origin/Destination reversible.
Image Credits: Larry Johnson, Creative Commons 2.0
American Airlines and United have round-trip flights from Houston (IAH/HOU) to Denver (DEN) for $177, NONSTOP or with connections. Flights July to November. Weekends available. Origin/Destination reversible. No Thanksgiving dates.
Image Credits: Larry Johnson, Creative Commons 2.0
United has round-trip flights from Houston (IAH) to Denver (DEN) for $158, NONSTOP. Flights April to May. No Monday departures. Very few weekends available.
Image Credits: yeowatzup, Creative Commons 2.0
Frontier has round-trip flights from Houston (HOU/IAH) to Denver or Orlando (DEN, MCO) for $38-$46, NONSTOP. Flights January to March. Departures on Tuesday, Wednesday, and Saturday. Extended weekends available. Origin/Destination reversible.
Image Credits: Larry Johnson, Creative Commons 2.0
Frontier and Spirit have round-trip flights from Houston (IAH) to Denver (DEN) for $47-$56, NONSTOP. Flights July to September. Extended weekends available. Origin/Destination reversible.
Image Credits: Larry Johnson, Creative Commons 2.0
Frontier and Spirit have round-trip flights from Houston (IAH) to Denver (DEN) for $33-$39, NONSTOP. Flights March to May. Weekends available.
Note: Fares do not include a free carry-on bag. Only a small personal item, like a Jansport City Scout backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding.
Note: Seats only have about 28-inches of pitch; 2-to-3 inches less space than most other airlines.
Image Credits: Larry Johnson, Creative Commons 2.0
United and Southwest have round-trip flights from Houston (HOU/IAH) to Denver or Las Vegas (DEN/LAS) for $97, NONSTOP. $49 each-way. Weekends available. February to May. Origin/Destination reversible.
Southwest doesn’t charge a fee for changes, cancellations, or carry-on bags. United doesn’t charge a fee for changes, but United DOES charge additional fees for seat selection and carry-on bag.
Image Credits: Larry Johnson, Creative Commons 2.0
Frontier and Spirit have round-trip flights from Houston (IAH) to Denver (DEN) for $39-$43, NONSTOP. Flights January to March. No Friday departures. Extended weekends available. Origin/Destination reversible.
Note: Frontier and Spirit fares do not include a free carry-on bag. Only a small personal item, like a Jansport City Scout backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding.
Note: Frontier and Spirit seats only have 28-inches of pitch; 2-to-3 inches less space than most other airlines.
I’m currently using the Jansport Right Pack as my “personal item” when I fly Frontier and Spirit. Which is slightly more than expensive than the Jansport City Scout because its fabric is Cordura instead of Polyester. Both have the same dimensions which are: 18″ x 13″ x 8.5″. There is half-an-inch of extra depth than what is officially allowed by Frontier and Spirit, but it has never been a problem for me. The bag has a large main compartment, which makes it ideal for stuffing as much as you can into the limited amount of space.
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Image Credits: Larry Johnson, Creative Commons 2.0
Southwest has round-trip flights from Houston (HOU) to Denver (DEN) for $97, NONSTOP. $49 each-way. Weekends available. October to February 2021. Origin/Destination reversible.
Southwest doesn’t charge a fee for changes, cancellations, or carry-on bags.
Want a notification sent straight to your phone when any new deals are found? Join our Telegram channel and never miss another deal.
Patreon supporters receive a recap of all the airfare deals currently available from Houston everyday.
Image Credits: Larry Johnson, Creative Commons 2.0
United has round-trip flights from Houston (IAH) to Denver (DEN) for $97-$101, NONSTOP. Flights September to December. Weekends available. Origin/Destination reversible.
Change fees are waived, but United’s “Basic Economy” fares do not include a free carry-on bag. Only a personal item (like a small laptop bag) is free. Seats are randomly assigned for free prior to boarding. If you have the United MileagePlus credit-card, use the “free checked bag” perk.
The personal item size on United flights is smaller (9-in/10-in/17-in) than Frontier or Spirit (8-in/14-in/18-in).
Want a notification sent straight to your phone when any new deals are found? Join our Telegram channel and never miss another deal.
Patreon supporters receive a recap of all the airfare deals currently available from Houston everyday.
We don’t charge a subscription fee. Our deal notifications are available for FREE via Instagram, Facebook, Twitter, Telegram, our Webpage, and our E-mail list. If you are paying someone a subscription fee for this content, you are being ripped off.
Image Credits: Larry Johnson, Creative Commons 2.0
Due to the covid-19 pandemic, we do not recommend booking travel with departures before July. This fare has departures later in the year.
Frontier and Spirit have round-trip flights from Houston (IAH) to Denver (DEN) for $49-$51, NONSTOP. Flights June to December. Origin/Destination reversible. Mostly weekdays.
Note: Some small OTAs on Skyscanner have this for $40. If you plan on booking there, beware of any site that charges a fee to cancel a ticket within the 24-hour “free” period. Use unknown booking sites at your own risk.
Note: Frontier and Spirit fares do not include a free carry-on bag. Only a small personal item, like a Jansport City Scout backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding.
Note: Frontier and Spirit seats only have 28-inches of pitch; 2-to-3 inches less space than most other airlines.
I’m currently using the Jansport Right Pack as my “personal item” when I fly Frontier and Spirit. Which is slightly more than expensive than the Jansport City Scout because its fabric is Cordura instead of Polyester. Both have the same dimensions which are: 18″ x 13″ x 8.5″. There is half-an-inch of extra depth than what is officially allowed by Frontier and Spirit, but it has never been a problem for me. The bag has a large main compartment, which makes it ideal for stuffing as much as you can into the limited amount of space.
Want a notification sent straight to your phone when any new deals are found? Join our Telegram channel and never miss another deal.
Patreon supporters receive a recap of all the airfare deals currently available from Houston everyday.
We don’t charge a subscription fee. Our deal notifications are available for FREE via Instagram, Facebook, Twitter, Telegram, our Webpage, and our E-mail list. If you are paying someone a subscription fee for this content, you are being ripped off.