Cheapest one-way flights from Portland to Denver in March from $27

AirHint found the following cheapest one-way flights from Portland (PDX) to Denver (DEN) in March 2026 (see full year).

One-Way flights

13 Mar Frontier Airlines direct
15 Mar Frontier Airlines direct
07 Mar Frontier Airlines
11 Mar Alaska Airlines direct
10 Mar Alaska Airlines direct
07 Mar Alaska Airlines direct
02 Mar Frontier Airlines
16 Mar Hawaiian Airlines direct
02 Mar Alaska Airlines direct
26 Mar Frontier Airlines direct

Also check the deals for return flights from Portland to Denver in March.

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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.

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