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$135+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — DEN
Apr 20 — Apr 271
Mon 4/20
Mon 4/27
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 April, booked 72 days in advance, depart on a Friday or Wednesday and return on a Friday

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 March 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/18. 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 stop23h 31m
Multiple Airlines
Wed 5/206:03 am
DEN
-
PWM
1 stop8h 13m
Multiple Airlines
Deal found 3/18$265
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 stop23h 31m
Multiple Airlines
Wed 5/136:03 am
DEN
-
PWM
1 stop8h 13m
Multiple Airlines
Deal found 3/17$270
This United Airlines deal was found by Cheapflights users on 3/17. 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 5/62:08 pm
PWM
-
DEN
1 stop7h 21m
United Airlines
Tue 5/126:00 am
DEN
-
PWM
1 stop6h 14m
United Airlines
Deal found 3/17$277
This American Airlines deal was found by Cheapflights users on 3/17. 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.
Wed 5/63:39 pm
PWM
-
DEN
2 stops10h 06m
American Airlines
Tue 5/128:40 am
DEN
-
PWM
1 stop8h 18m
American Airlines
Deal found 3/17$282
This Southwest deal was found by Cheapflights users on 3/16. 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 4/73:50 pm
PWM
-
DEN
1 stop7h 40m
Southwest
Thu 4/95:45 am
DEN
-
PWM
1 stop6h 25m
Southwest
Deal found 3/16$283
This Expedia deal was found by Cheapflights users on 3/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/176:00 am
PWM
-
DEN
1 stop9h 24m
JetBlue
Fri 6/262:29 pm
DEN
-
PWM
1 stop7h 28m
JetBlue
Deal found 3/17$285
This American Airlines deal was found by Cheapflights users on 3/17. 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.
Tue 5/51:18 pm
PWM
-
DEN
1 stop9h 13m
American Airlines
Sat 5/96:10 am
DEN
-
PWM
2 stops10h 48m
American Airlines
Deal found 3/17$288
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Sat 5/211:34 am
PWM
-
DEN
1 stop6h 42m
United Airlines
Mon 5/1111:59 pm
DEN
-
PWM
1 stop6h 50m
United Airlines
Deal found 3/17$289
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 stop23h 31m
Multiple Airlines
Tue 5/1211:54 pm
DEN
-
PWM
2 stops14h 22m
Multiple Airlines
Deal found 3/17$290
This Southwest deal was found by Cheapflights users on 3/20. 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 4/296:10 am
PWM
-
DEN
2 stops9h 25m
Southwest
Sat 5/91:05 pm
DEN
-
PWM
2 stops8h 05m
Southwest
Deal found 3/20$293
This Kiwi.com deal was found by Cheapflights users on 3/18. 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
2 stops28h 35m
Multiple Airlines
Wed 5/206:03 am
DEN
-
PWM
1 stop8h 13m
Multiple Airlines
Deal found 3/18$296
This American Airlines deal was found by Cheapflights users on 3/19. 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.
Wed 5/206:01 pm
PWM
-
DEN
1 stop8h 05m
American Airlines
Wed 5/278:47 am
DEN
-
PWM
1 stop6h 03m
American Airlines
Deal found 3/19$297

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 March 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$265
(Kiwi.com)

One-way from

$135
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$482

Good round-trip deal

$452 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. 11% potential increase in price ($54 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 March 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 March 21, 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

Tue 4/7

4:28 pm-10:10 pm

1 stop7h 42m

Denver Intl

Tue 4/21

11:59 pm-9:25 am

1 stop7h 26m

$277

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 4/7

3:50 pm-10:35 pm

2 stops8h 45m

Denver Intl

Thu 4/9

5:45 am-2:10 pm

1 stop6h 25m

$288
Quickest round-trip

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 5/7

3:23 pm-6:02 pm

Nonstop4h 39m

Denver Intl

Tue 5/12

6:00 am-2:49 pm

1 stop6h 49m

$303

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 4/16

6:33 pm-11:59 pm

1 stop7h 26m

Denver Intl

Sun 4/19

11:59 pm-9:25 am

1 stop7h 26m

$319

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 4/7

3:50 pm-9:30 pm

1 stop7h 40m

Denver Intl

Mon 4/13

11:35 am-11:25 pm

2 stops9h 50m

$352

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 4/7

4:28 pm-10:10 pm

1 stop7h 42m

Denver Intl

Sat 4/11

6:00 am-2:37 pm

1 stop6h 37m

$373

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 5/7

2:38 pm-10:40 pm

1 stop10h 02m

Denver Intl

Tue 5/19

11:50 pm-12:43 am

1 stop22h 53m

$381

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 5/20

3:23 pm-6:02 pm

Nonstop4h 39m

Denver Intl

Wed 5/27

11:59 pm-9:11 am

1 stop7h 12m

$384

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 5/8

5:30 am-2:05 pm

2 stops10h 35m

Denver Intl

Sun 5/10

11:55 pm-2:10 pm

1 stop12h 15m

$415

PortlandDenver

PWM - DEN

PWMDEN

Portland

Sun 4/5

12:35 pm-6:20 pm

1 stop7h 45m

Denver Intl

Wed 4/8

5:15 am-3:20 pm

1 stop8h 05m

$419

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/16

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 March.
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 March 13, 2026.

Booking 67 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.

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 March 21, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland, Maine to Denver as you normally would.

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 March 21, 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
4,325 reviews

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
4,325 reviews
Southwest
8.0
Very good
4,325 reviews

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
8,312 reviews
Southwest
8.0
Very good
4,325 reviews

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
9,452 reviews
Southwest
8.0
Very good
4,325 reviews

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
11,488 reviews
Southwest
8.0
Very good
4,325 reviews

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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 $364, Southwest can have you in Denver from Portland, Maine in 4h 39m. 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, American Airlines ($253), Delta ($256), and Southwest ($278) offers the cheapest pricing from Portland, Maine to Denver. You may be able to fly from Portland, Maine to Denver for 43% 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 $452, our data shows the cheapest flight currently is $239. When looking at the most popular route, (Portland - Denver Intl), you can expect to pay $266 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
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
Glendale
Manitou Springs
Frisco
Englewood
Fort Morgan
Brighton

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Portland to Denver

Discover the top 4 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 March 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$253Average$376FlexibilityNo cancel feeOn-time71%
DeltaCheapest$256Average$357FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$278Average$452FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$292Average$520FlexibilityNo cancel feeOn-time69%

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