AirHint found the following cheapest one-way flights from Houston (HOU) to Denver (DEN) in May 2026 (see full year).
One-Way flights
| 08 May | Southwest Airlines | direct | |
| 01 May | United | direct | |
| 10 May | United | direct | |
| 24 May | United | direct | |
| 03 May | Southwest Airlines | ||
| 03 May | United | direct |
Also check the deals for return flights from Houston to Denver in May.
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