AirHint found the following cheapest one-way flights from Denver (DEN) to Houston (IAH) in April 2026 (see full year).
One-Way flights
| 15 Apr | Frontier Airlines | direct | |
| 11 Apr | Frontier Airlines | direct | |
| 09 Apr | Frontier Airlines | direct | |
| 06 Apr | Frontier Airlines | direct | |
| 23 Apr | Frontier Airlines | direct | |
| 10 Apr | Frontier Airlines | direct |
Also check the deals for return flights from Denver to Houston in April.
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