Cheapest return flights from Portland to Denver in April from $54

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 - 18 Apr Frontier Airlines direct
23 Apr - 29 Apr Frontier Airlines direct
26 Apr - 03 May Frontier Airlines direct
21 Apr - 28 Apr Frontier Airlines direct
17 Apr - 19 Apr Frontier Airlines direct
12 Apr - 15 Apr Allegiant Air
03 Apr - 06 Apr Frontier Airlines direct
01 Apr - 07 Apr United direct
23 Apr - 26 Apr Frontier Airlines direct
25 Apr - 26 Apr Frontier Airlines direct

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

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