$51 Cheap Flights from Portland (PDX) to Denver (DEN)

View $51 flight on Wed, Sep 24, 2025Opens in a new window

Popular airlines from Portland International Airport (PDX) to Denver Intl. Airport (DEN)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Today's featured flight deals from Portland International Airport (PDX) to Denver Intl. Airport (DEN)

Nonstop
Carry-on included
Lower price than typical

Cheap Flights from Portland to Denver (PDX-DEN)

Prices were available within the past 7 days and start at $51 for one-way flights and $106 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Oct 8 - Tue, Oct 14
PDX
Portland
DEN
Denver
$106 Roundtrip, found 20 hours ago
$106
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Wed, Oct 8 from Portland to Denver, returning Tue, Oct 14, priced at $106 found 20 hours ago
Frontier Airlines
Sat, Sep 20 - Tue, Sep 23
PDX
Portland
DEN
Denver
$111 Roundtrip, just found
$111
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Sep 20 from Portland to Denver, returning Tue, Sep 23, priced at $111 just found
Frontier Airlines
Tue, Sep 2 - Wed, Sep 17
PDX
Portland
DEN
Denver
$112 Roundtrip, found 21 hours ago
$112
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Tue, Sep 2 from Portland to Denver, returning Wed, Sep 17, priced at $112 found 21 hours ago
Frontier Airlines
Sat, Oct 25 - Mon, Oct 27
PDX
Portland
DEN
Denver
$117 Roundtrip, found 2 hours ago
$117
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Oct 25 from Portland to Denver, returning Mon, Oct 27, priced at $117 found 2 hours ago
Frontier Airlines
Wed, Sep 24 - Tue, Oct 14
PDX
Portland
DEN
Denver
$119 Roundtrip, found 2 days ago
$119
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Sep 24 from Portland to Denver, returning Tue, Oct 14, priced at $119 found 2 days ago
Frontier Airlines
Wed, Sep 17 - Sat, Sep 20
PDX
Portland
DEN
Denver
$126 Roundtrip, just found
$126
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Sep 17 from Portland to Denver, returning Sat, Sep 20, priced at $126 just found
Southwest Airlines
Tue, Sep 23 - Sat, Sep 27
PDX
Portland
DEN
Denver
$139 Roundtrip, just found
$139
Roundtrip
just found
Select Southwest Airlines flight, departing Tue, Sep 23 from Portland to Denver, returning Sat, Sep 27, priced at $139 just found
United
Wed, Nov 5 - Wed, Nov 12
PDX
Portland
DEN
Denver
$139 Roundtrip, just found
$139
Roundtrip
just found
Select United flight, departing Wed, Nov 5 from Portland to Denver, returning Wed, Nov 12, priced at $139 just found
Alaska Airlines
Sat, Nov 8 - Tue, Nov 11
PDX
Portland
DEN
Denver
$140 Roundtrip, found 5 hours ago
$140
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Sat, Nov 8 from Portland to Denver, returning Tue, Nov 11, priced at $140 found 5 hours ago
American Airlines
Tue, Sep 23 - Sat, Sep 27
PDX
Portland
DEN
Denver
$159 Roundtrip, just found
$159
Roundtrip
just found
Select American Airlines flight, departing Tue, Sep 23 from Portland to Denver, returning Sat, Sep 27, priced at $159 just found

Find the cheapest month to fly from Portland (PDX) to Denver (DEN)

February is typically the cheapest month to fly

From $48 - $277 per traveler.

Graph displaying average flight prices per month

Alternative airports near Denver

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city center is 32 minutes. Flights from $140
DEN
Denver Intl.
Cheapest
Average driving time to city center32 min
Flights from $140
Flights from Portland (PDX) to Denver (DEN)
Origin airport
Portland Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$106
Distance
989 mi
Average flight time
3 hours 31 mins

Portland to Denver Flights

The cheapest times to fly from Portland to Denver

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Portland to Denver are during the month of October. You can find some of the cheapest flights from Portland to Denver with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Denver

Sunday is one of the best days to book for cheap flights from Portland to Denver: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Portland to Denver

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Portland to Denver in 2025. You can also book with separate airlines for your outbound and return journeys, from $51 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Portland to Denver flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Portland to Denver airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN) cost?
Snag a cheap one-way flight from $51 or cheap return flight from $106 from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN)?
The cheapest month to fly from PDX to DEN is October, when there's less demand. Off-peak season is often when airlines offer lower prices between these airports.
Which airlines fly direct from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN)?
Avoid the detours and fly nonstop from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN) with 4 airlines, including:

  • United Airlines
  • Southwest Airlines
  • Frontier Airlines

What is the cheapest airline that flies from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN)?
The cheapest airline to offer flights between Portland Intl. Airport (PDX) and Denver Intl. Airport (DEN) can change depending on your travel plans. Alaska Airlines and Frontier Airlines are just some of the choices offering reasonable prices. Use Expedia's filters to compare airlines in one place and find the right PDX to DEN flight that fits your budget.
How many flights per day from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN)?
Each day, an average of 9 direct flights operate from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN). Select the departure time that works for you.
What are the most popular departure times for flights from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN)?
The 12 PM departures from PDX to DEN are typically the busiest. Prices can be higher for these popular slots. If you want to save money, book during off-peak hours.
What day of the week has the most flights from PDX to DEN?
Fly on a Friday if you're searching for the best choice of flights from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN).
What is the earliest flight from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN)?
Portland Intl. Airport (PDX)'s first flight to Denver Intl. Airport (DEN) is at approximately 5:00AM UTC-8. With a total journey time of 2h 32m, you'll arrive at around 8:32AM UTC-7.
How long does it take to fly from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN)?
The average flight duration from PDX to DEN is 2 hours and 31 minutes, covering a total distance of 990 mi.
What airline has the least delays from PDX to DEN?
Sun Country Airlines has the best performance for on-time direct flights from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN), with an on-time score of 100%. Use the Expedia App to look up your flight schedule before you head off and get immediate updates about any trip changes.
What is the best time to fly from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN)?
To avoid possible delays on the Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN) route, aim to travel before 3 PM. Later departures have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Denver from Portland Intl. Airport (PDX)?
Denver Intl. Airport (DEN) is the only airport in Denver with direct flights from Portland Intl. Airport (PDX). Consider your options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN) last-minute?
Booking your ticket from PDX to DEN just before your journey is generally more expensive. However, if there's some wiggle room with your departure times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a PDX to DEN flight and hotel package?
You can save money by booking a PDX to DEN flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've selected your ideal flights and accommodations, consider adding extras including activities, car rentals and tours.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN)?
In most instances, you're able to cancel or reschedule your PDX to DEN flight. However, there may be additional fees, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want more details, visit our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.