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$134+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — DEN
May 10 — May 171
Sun 5/10
Sun 5/17
1 adult, Economy
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Find cheap flights from Portland to Denver with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Portland to Denver Intl are usually found in February or October, booked 89 days in advance, depart on a Friday or Wednesday and return on a Tuesday

Cheap 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 April 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/7. 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 5/45:06 pm
PWM
-
DEN
2 stops31h 33m
Multiple Airlines
Sat 5/167:00 am
DEN
-
PWM
1 stop7h 16m
Multiple Airlines
Deal found 4/7$287
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Sun 5/107:56 pm
PWM
-
DEN
2 stops28h 28m
Multiple Airlines
Wed 5/137:00 am
DEN
-
PWM
1 stop7h 16m
Multiple Airlines
Deal found 4/7$298
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 5/411:29 am
PWM
-
DEN
1 stop29h 59m
Multiple Airlines
Tue 5/1211:59 pm
DEN
-
PWM
2 stops14h 17m
Multiple Airlines
Deal found 4/7$300
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Wed 5/65:01 pm
PWM
-
DEN
2 stops23h 03m
Multiple Airlines
Sat 5/167:00 am
DEN
-
PWM
1 stop7h 16m
Multiple Airlines
Deal found 4/7$301
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Thu 5/77:56 pm
PWM
-
DEN
2 stops28h 28m
Multiple Airlines
Wed 5/137:00 am
DEN
-
PWM
1 stop7h 16m
Multiple Airlines
Deal found 4/7$304
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 5/411:29 am
PWM
-
DEN
1 stop29h 59m
Multiple Airlines
Fri 5/811:54 pm
DEN
-
PWM
2 stops14h 22m
Multiple Airlines
Deal found 4/8$306
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Sat 5/95:01 pm
PWM
-
DEN
2 stops17h 23m
Multiple Airlines
Wed 5/137:00 am
DEN
-
PWM
1 stop7h 16m
Multiple Airlines
Deal found 4/7$311
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 5/411:29 am
PWM
-
DEN
1 stop29h 59m
Multiple Airlines
Fri 5/1511:56 pm
DEN
-
PWM
2 stops14h 20m
Multiple Airlines
Deal found 4/7$314
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Wed 5/65:01 pm
PWM
-
DEN
1 stop24h 27m
Multiple Airlines
Fri 5/1511:56 pm
DEN
-
PWM
2 stops14h 20m
Multiple Airlines
Deal found 4/7$315
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Wed 5/65:01 pm
PWM
-
DEN
1 stop24h 27m
Multiple Airlines
Sat 5/97:00 am
DEN
-
PWM
1 stop7h 16m
Multiple Airlines
Deal found 4/7$316
This Kiwi.com deal was found by Cheapflights users on 4/5. 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.
Wed 4/296:18 pm
PWM
-
DEN
1 stop30h 41m
Multiple Airlines
Sat 5/3011:54 pm
DEN
-
PWM
2 stops17h 22m
Multiple Airlines
Deal found 4/5$317

Find 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 April 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$287
(Kiwi.com)

One-way from

$134
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$425

Good round-trip deal

$440 or less

Good one-way deal

$273 or less
Provider with most accurate pricing for Portland-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Denver Intl flights.
Search Deals
From Portland to Denver Intl
Search Deals
One-way flight from Portland to Denver Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Portland to Denver Intl.
Search Deals
Price to beat on a one-way flight from Portland to Denver Intl.
Search Deals

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 April 10, 2026.
Use the filters below to find and compare flights from Portland to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 6/26

7:16 pm-12:30 am

1 stop7h 14m

Denver Intl

Mon 6/29

11:59 pm-9:11 am

1 stop7h 12m

$349

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 6/4

3:10 pm-10:55 pm

2 stops9h 45m

Denver Intl

Sun 6/7

11:50 pm-9:45 am

1 stop7h 55m

$354

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 5/29

2:50 pm-11:25 pm

2 stops10h 35m

Denver Intl

Fri 6/5

2:35 pm-12:05 am

1 stop7h 30m

$354

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 7/1

3:31 pm-6:10 pm

Nonstop4h 39m

Denver Intl

Wed 7/8

3:50 pm-11:51 pm

1 stop6h 01m

$374

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 5/5

7:10 pm-12:44 am

1 stop7h 34m

Denver Intl

Sun 5/10

6:00 am-2:49 pm

1 stop6h 49m

$376

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 4/24

6:33 pm-11:59 pm

1 stop7h 26m

Denver Intl

Tue 4/28

11:59 pm-9:25 am

1 stop7h 26m

$384

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 5/14

2:50 pm-9:30 pm

1 stop8h 40m

Denver Intl

Tue 5/19

5:15 am-3:20 pm

1 stop8h 05m

$404
Quickest round-trip

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 5/22

3:31 pm-6:10 pm

Nonstop4h 39m

Denver Intl

Mon 5/25

9:54 am-3:49 pm

Nonstop3h 55m

$407

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 5/27

3:31 pm-6:10 pm

Nonstop4h 39m

Denver Intl

Mon 6/1

11:59 pm-9:11 am

1 stop7h 12m

$439

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 9/4

3:31 pm-6:08 pm

Nonstop4h 37m

Denver Intl

Sat 9/12

11:59 pm-9:22 am

1 stop7h 23m

$439

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Portland to Denver

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Denver in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland, Maine-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 April 3, 2026.

Booking 88 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, November is the cheapest month in which you can book a flight from Portland, Maine to Denver (average of $87). Flying from Portland, Maine to Denver in January is currently the most expensive (average of $158). 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.

How much does it cost to fly round-trip from Portland, Maine to Denver?

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 April 10, 2026.
Read through reviews of airlines operating flights from Portland to Denver, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,334 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,400 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,562 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
JetBlue
7.2
Good
2,926 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,564 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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.

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

    Flights from Portland to Denver Intl have been viewed 8 times in the past calendar month.

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

    For as low as $349, United Airlines can have you in Denver from Portland, Maine in 7h 14m. 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, Delta ($238), JetBlue ($242), and American Airlines ($253) offers the cheapest pricing from Portland, Maine to Denver. You may be able to fly from Portland, Maine to Denver for 46% 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 American Airlines, which is currently one of the cheapest options available, starting at $99. Delta flights start at $128 while deals on Southwest start at $144 one-way.

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

    While on average a flight from Portland, Maine to Denver is generally $429, our data shows the cheapest flight currently is $235. When looking at the most popular route, (Portland - Denver Intl), you can expect to pay $282 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, November is the cheapest month in which you can book a flight from Portland, Maine to Denver (average of $87). Flying from Portland, Maine to Denver in January is currently the most expensive (average of $158). 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
Thornton
Black Hawk
Lakewood
Westminster
Broomfield
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
Manitou Springs
Frisco
Englewood
Fort Morgan
Glendale
Evergreen

Browse thousands of different options on Cheapflights for your next trip

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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 April 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$238Average$352FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$242Average$402FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$253Average$376FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$288Average$457FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$293Average$511FlexibilityNo cancel feeOn-time69%

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