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$73+ Cheap flights from Portland to Denver (PDX - DEN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — DEN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Denver Intl are usually found in September or October, booked 30 days in advance, depart on a Friday or Saturday and return on a Saturday

Cheap flight deals from Portland to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$96
(Kiwi.com)

One-way from

$73
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$143

Good round-trip deal

$197 or less

Good one-way deal

$134 or less
From Portland to Denver Intl
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One-way flight from Portland to Denver Intl
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Highest demand for flights based on searches. 4% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Portland to Denver Intl.
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Price to beat on a one-way flight from Portland to Denver Intl.
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Find flight deals from Portland to Denver

Cheapest flights from Portland to Denver
Explore the most affordable flight options available from Portland to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/37:17 pmPDX - DEN
1 stop28h 09mFrontier
Tue 10/79:58 amDEN - PDX
Nonstop2h 50mFrontier
Deal found 9/10$96
This Cheapflightsfares deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1612:43 pmPDX - DEN
Nonstop2h 43mFrontier
Sat 10/189:58 amDEN - PDX
Nonstop2h 50mFrontier
Deal found 9/8$97
This Frontier deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:15 amPDX - DEN
Nonstop2h 43mFrontier
Thu 10/210:29 pmDEN - PDX
Nonstop2h 43mFrontier
Deal found 9/9$98
This Cheapflightsfares deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/812:43 pmPDX - DEN
Nonstop2h 43mFrontier
Sun 10/1210:29 pmDEN - PDX
1 stop23h 18mFrontier
Deal found 9/10$99
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1412:43 pmPDX - DEN
Nonstop2h 43mFrontier
Mon 10/206:00 amDEN - PDX
1 stop15h 47mFrontier
Deal found 9/10$100
This Frontier deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:15 amPDX - DEN
Nonstop2h 43mFrontier
Fri 10/310:29 pmDEN - PDX
Nonstop2h 43mFrontier
Deal found 9/8$102
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:15 amPDX - DEN
Nonstop2h 43mFrontier
Wed 10/18:50 pmDEN - PDX
Nonstop2h 44mFrontier
Deal found 9/10$103
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/296:05 amPDX - DEN
Nonstop2h 39mFrontier
Wed 10/18:50 pmDEN - PDX
Nonstop2h 44mFrontier
Deal found 9/8$104
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2911:09 amPDX - DEN
1 stop11h 07mFrontier
Thu 10/210:29 pmDEN - PDX
Nonstop2h 43mFrontier
Deal found 9/10$105
This Frontier deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:05 amPDX - DEN
Nonstop2h 39mFrontier
Sun 10/510:29 pmDEN - PDX
Nonstop2h 43mFrontier
Deal found 9/11$106
This Frontier deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1812:43 pmPDX - DEN
Nonstop2h 43mFrontier
Mon 10/279:58 amDEN - PDX
Nonstop2h 50mFrontier
Deal found 9/11$107

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Portland to Denver that are best for you.

Fly from

Portland

Fly to

Denver

Route

Depart

Return

Price

PortlandDenver

PDX - DEN

PDXDEN

Portland

Sat 1/24

5:20 am-8:50 am

Nonstop2h 30m

Denver Intl

Wed 1/28

8:40 am-10:35 am

Nonstop2h 55m

$129

PortlandDenver

PDX - DEN

PDXDEN

Portland

Thu 1/8

7:00 am-10:32 am

Nonstop2h 32m

Denver Intl

Sat 1/10

11:30 am-1:14 pm

Nonstop2h 44m

$149

PortlandDenver

PDX - DEN

PDXDEN

Portland

Tue 10/21

1:30 pm-6:56 pm

1 stop4h 26m

Denver Intl

Wed 10/29

6:25 am-10:30 am

1 stop5h 05m

$153

PortlandDenver

PDX - DEN

PDXDEN

Portland

Tue 9/30

5:15 am-11:09 am

1 stop4h 54m

Denver Intl

Tue 9/30

7:49 pm-11:52 pm

1 stop5h 03m

$153

PortlandDenver

PDX - DEN

PDXDEN

Portland

Wed 11/5

5:30 am-1:35 pm

1 stop7h 05m

Denver Intl

Mon 11/10

7:50 am-12:05 pm

1 stop5h 15m

$155

PortlandDenver

PDX - DEN

PDXDEN

Portland

Thu 11/27

7:05 am-10:30 am

Nonstop2h 25m

Denver Intl

Mon 12/1

7:05 am-9:00 am

Nonstop2h 55m

$155

PortlandDenver

PDX - DEN

PDXDEN

Portland

Wed 10/15

10:45 am-6:20 pm

2 stops6h 35m

Denver Intl

Sat 10/18

3:20 pm-10:10 pm

1 stop7h 50m

$163

PortlandDenver

PDX - DEN

PDXDEN

Portland

Tue 10/21

5:10 am-11:10 am

1 stop5h 00m

Denver Intl

Tue 10/28

7:55 am-2:35 pm

2 stops7h 40m

$164

PortlandDenver

PDX - DEN

PDXDEN

Portland

Thu 10/9

5:00 am-8:34 am

Nonstop2h 34m

Denver Intl

Sun 10/12

3:40 pm-5:21 pm

Nonstop2h 41m

$165

PortlandDenver

PDX - DEN

PDXDEN

Portland

Wed 12/3

7:10 am-10:45 am

Nonstop2h 35m

Denver Intl

Sat 1/3

7:20 am-9:18 am

Nonstop2h 58m

$167

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 20 results
1
2

The best insider tips for Portland to Denver flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Portland to Denver trip
Airlines
Frontier

Frontier offers extra comfort seats with 32” separation for a fee, enhancing travel comfort.


Frontier's Zone 1 boarding available with carry-on purchase or special fare bundle.

Read more about Frontierby Marisa Garcia
United Airlines

United's Economy Plus offers extra legroom seats towards the front of the economy cabin.


United's MileagePlus program allows pooling miles, useful for family travel.

Read more about United Airlinesby Harriet Baskas
Airports
PDX

PDX offers Express Lanes for expedited security, available to first and business class ticket holders and elite status members of major airlines.

Read more about PDXby Brandon Schultz
DEN

Take the A Line train from DEN to Union Station in 37 minutes, running every 15 minutes for convenient city access.

Read more about DENby Emily Zemler
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Brandon Schultz

Brandon Schultz

Expert on PDX

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more
Emily Zemler

Emily Zemler

Expert on DEN

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more

Best time to book a flight from Portland to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Denver

How far ahead should I book a flight from Portland to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Denver. Price data was last updated on August 29, 2025.

The best time to book flights from Portland to Denver is 30 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Portland to Denver?

Currently, October is the cheapest month in which you can book a flight from Portland to Denver (average of $197). Flying from Portland to Denver in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PDX to DEN?

Find hourly flight availability from Portland to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from Portland to Denver in the evening. If you’re flexible enough to do this you can expect to save up to 25% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Portland to Denver?

Use this chart to determine the cheapest time to fly round-trip from Portland to Denver. Price data was last updated on September 7, 2025.

Travelers seeking maximum savings on their Portland to Denver flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated September 11, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Hawaiian Airlines from Portland to Denver to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,248 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Hawaiian Airlines
7.8
Good
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Frontier
5.8
Fair
3,177 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Portland to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Portland to Denver?

    If you book a flight from Portland to Denver, you will be flying from Portland to Denver Intl. Flights to Denver Intl (DEN) from Portland (PDX) take 2h 25m for a nonstop flight. There are 15 flights from Portland to Denver per day from 5 airlines.

  • How popular is this Portland to Denver flight route?

    This flight path from Portland to Denver Intl was viewed by 214 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Portland to Denver?

    A quick flight from Portland to Denver can take about 2h 30m. Southwest provides one of the quickest options available for as low as $129. There are 989 mi between Portland and Denver. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Portland to Denver round-trip?

    Cheapflights users have booked flights from Portland to Denver round-trip from $58. Other airlines that can offer you cheap pricing are Hawaiian Airlines, from $98, and Southwest, from $157. Users have found that Frontier is 70% cheaper than the other options available to this destination.

  • What are the most reliable airlines from Portland to Denver?

    The top 3 most reliable airlines when flying from Portland to Denver are United Airlines (82%), Lufthansa (80%) and SWISS (73%).

  • What are the cheapest flights from Portland to Denver?

    While on average a flight from Portland to Denver is generally $834, our data shows the cheapest flight currently is $89. When looking at the most popular route, (Portland - Denver Intl), you can expect to pay $57 for that flight.

  • Can I find deals for flights from Portland to Denver that include hotel bookings?

    Yes. In addition to deals on Portland to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Denver.

  • Can I find deals for business class flights from Portland to Denver?

    Yes. Cheapflights offers flight deals from Portland to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Denver?

    Currently, October is the cheapest month in which you can book a flight from Portland to Denver (average of $197). Flying from Portland to Denver in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Westminster
Black Hawk
Golden
Winter Park
Broomfield
Greeley
Lone Tree
Lakewood
Cripple Creek
Thornton
Silverthorne
Frisco
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portland to Denver

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Portland to Denver

Discover the top 5 airlines that operate flights from Portland to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$141FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$98Average$234FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$157Average$246FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$158Average$304FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$163Average$262FlexibilityNo cancel feeOn-time75%

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