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

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

Return flights

02 May - 06 May Frontier Airlines direct
02 May - 03 May Frontier Airlines direct
29 May - 31 May Frontier Airlines direct
30 May - 01 Jun Frontier Airlines direct
28 May - 31 May Frontier Airlines direct

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

Powered by

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Denver

Cheap car rent in Denver

Feel free to contact us with any feedback or request another flight research.