Cheapest return flights from Portland to Denver in April from $55

AirHint found the following cheapest return flights from Portland (PDX) to Denver (DEN) in April 2026 (see full year).

Return flights

25 Apr - 29 Apr Frontier Airlines direct
16 Apr - 19 Apr Frontier Airlines direct
29 Apr - 04 May Frontier Airlines direct
30 Apr - 04 May Frontier Airlines direct
24 Apr - 29 Apr Frontier Airlines direct
18 Apr - 21 Apr Frontier Airlines direct

Also check the deals for one-way flights from Portland to Denver in April.

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