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$97+ Cheap flights from Portland, ME to Denver (PWM - 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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — DEN
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Denver Intl are usually found in January or April, booked 72 days in advance, depart on a Friday or Wednesday 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 (PWM) 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 16, 2025.

Round-trip from

$299
(American Airlines)

One-way from

$97
(Southwest)

Popular in

June

Cheapest in

January

Average price

$472

Good round-trip deal

$374 or less

Good one-way deal

$299 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. 10% potential increase in price ($51 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 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 16, 2025.

This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/256:00 amPWM - DEN
2 stops9h 23mAmerican Airlines
Tue 10/289:20 amDEN - PWM
2 stops8h 58mAmerican Airlines
Deal found 9/15$299
This United Airlines deal was found by Cheapflights users on 9/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/193:20 pmPWM - DEN
Nonstop5h 03mUnited Airlines
Wed 12/31:50 pmDEN - PWM
1 stop7h 19mUnited Airlines
Deal found 9/16$304
This Southwest deal was found by Cheapflights users on 9/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:30 amPWM - DEN
2 stops10h 25mSouthwest
Fri 11/75:30 amDEN - PWM
1 stop6h 55mSouthwest
Deal found 9/15$306
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/33:28 pmPWM - DEN
1 stop8h 48mAmerican Airlines
Tue 10/78:11 amDEN - PWM
1 stop8h 02mAmerican Airlines
Deal found 9/15$308
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/34:48 pmPWM - DEN
2 stops20h 16mDelta
Fri 11/75:45 amDEN - PWM
1 stop8h 18mDelta
Deal found 9/15$310
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/412:45 pmPWM - DEN
1 stop7h 15mSouthwest
Tue 11/411:55 pmDEN - PWM
1 stop10h 15mSouthwest
Deal found 9/16$312
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/34:57 pmPWM - DEN
1 stop7h 03mUnited Airlines
Mon 10/611:59 pmDEN - PWM
1 stop7h 12mUnited Airlines
Deal found 9/14$314
This Southwest deal was found by Cheapflights users on 9/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:45 pmPWM - DEN
2 stops11h 30mSouthwest
Sun 11/1611:55 pmDEN - PWM
2 stops10h 15mSouthwest
Deal found 9/15$315
This American Airlines deal was found by Cheapflights users on 9/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/33:56 pmPWM - DEN
1 stop9h 29mAmerican Airlines
Mon 10/67:21 amDEN - PWM
2 stops7h 20mAmerican Airlines
Deal found 9/14$319
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/34:54 pmPWM - DEN
1 stop8h 21mUnited Airlines
Sat 11/810:05 amDEN - PWM
Nonstop3h 43mUnited Airlines
Deal found 9/15$322

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 16, 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

PWM - DEN

PWMDEN

Portland

Sat 12/13

6:00 am-1:58 pm

1 stop9h 58m

Denver Intl

Wed 12/31

11:59 pm-9:44 am

1 stop7h 45m

$308

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 10/7

6:00 am-12:17 pm

1 stop8h 17m

Denver Intl

Tue 10/14

6:00 am-4:44 pm

1 stop8h 44m

$308

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 10/31

1:05 pm-8:05 pm

2 stops9h 00m

Denver Intl

Mon 11/3

7:00 am-2:55 pm

1 stop5h 55m

$326

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 11/7

1:27 pm-8:15 pm

1 stop8h 48m

Denver Intl

Mon 11/10

1:10 pm-10:19 pm

1 stop7h 09m

$334

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 10/15

2:38 pm-9:41 pm

1 stop9h 03m

Denver Intl

Wed 10/22

12:42 pm-12:05 am

1 stop9h 23m

$338

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 10/3

3:39 pm-6:05 pm

Nonstop4h 26m

Denver Intl

Tue 10/7

11:15 am-9:44 pm

1 stop8h 29m

$347

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 10/31

3:20 pm-6:21 pm

Nonstop5h 01m

Denver Intl

Mon 11/3

11:59 pm-10:04 am

1 stop8h 05m

$359

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 10/30

3:20 pm-6:21 pm

Nonstop5h 01m

Denver Intl

Mon 11/3

11:59 pm-10:04 am

1 stop8h 05m

$359

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 11/18

4:51 pm-9:49 pm

1 stop6h 58m

Denver Intl

Fri 12/5

1:50 pm-11:09 pm

1 stop7h 19m

$363

PortlandDenver

PWM - DEN

PWMDEN

Portland

Sun 11/16

5:30 am-11:58 am

1 stop8h 28m

Denver Intl

Fri 12/5

1:50 pm-11:09 pm

1 stop7h 19m

$369

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 21 results
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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, Maine 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 September 12, 2025.

Booking 72 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland, Maine to Denver. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, October is the cheapest month in which you can book a flight from Portland, Maine to Denver (average of $197). Flying from Portland, Maine 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 PWM 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 16, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 53% on flights from Portland, Maine to Denver by exploring options for tickets in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Portland to Denver. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Portland, Maine to Denver flight should consider departing on Friday 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 16, 2025.
Read through reviews of airlines operating flights from Portland to Denver, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,957 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,924 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,174 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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?

    Denver Intl is the airport most travelers will use when flying to Denver from Portland. Booking flights from Portland (PWM) to Denver Intl (DEN) should be relatively easy as there is 1 daily flight to Denver from 6 different airlines. 4h 25m is how long a flight from Portland to Denver Intl will take if you book a nonstop flight.

  • How popular is this Portland, Maine to Denver flight route?

    Flights from Portland to Denver Intl have been viewed 1 times in the past calendar month.

  • How long is the flight from Portland, Maine to Denver?

    For as low as $334, United Airlines can have you in Denver from Portland, Maine in 8h 48m. There are 1776 mi between Portland, Maine and Denver. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Frontier ($149), JetBlue ($226), and American Airlines ($256) offers the cheapest pricing from Portland, Maine to Denver. You may be able to fly from Portland, Maine to Denver for 67% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Portland, Maine to Denver one-way?

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $97. Delta flights start at $129 while deals on American Airlines start at $139 one-way.

  • What are the cheapest flights from Portland, Maine to Denver?

    While on average a flight from Portland, Maine to Denver is generally $404, our data shows the cheapest flight currently is $193. When looking at the most popular route, (Portland - Denver Intl), you can expect to pay $188 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, Maine to Denver?

    Currently, October is the cheapest month in which you can book a flight from Portland, Maine to Denver (average of $197). Flying from Portland, Maine 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
Black Hawk
Westminster
Golden
Winter Park
Lakewood
Broomfield
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker
Sterling

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Portland to Denver

Discover the top 6 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$149Average$243FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$226Average$341FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$256Average$381FlexibilityNo cancel feeOn-time71%
DeltaCheapest$256Average$352FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$302Average$460FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$314Average$565FlexibilityNo cancel feeOn-time69%

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