$113+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — DEN
Feb 25 — Mar 41
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Portland to Denver Intl are usually found in October or November, booked 72 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 DenverExplore 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 January 26, 2026.
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 January 26, 2026.
This American Airlines deal was found by Cheapflights users on 1/25. 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 2/215:57 pm
PWM
- DEN
1 stop6h 40m
American Airlines
Sat 2/288:00 am
DEN
- PWM
1 stop7h 27m
American Airlines
Deal found 1/25![American Airlines logo]()
$251
This American Airlines deal was found by Cheapflights users on 1/24. 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 2/255:40 pm
PWM
- DEN
1 stop6h 57m
American Airlines
Wed 3/48:00 am
DEN
- PWM
1 stop7h 07m
American Airlines
Deal found 1/24![American Airlines logo]()
$252
This American Airlines deal was found by Cheapflights users on 1/25. 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 2/205:40 pm
PWM
- DEN
1 stop6h 57m
American Airlines
Tue 2/248:00 am
DEN
- PWM
1 stop7h 07m
American Airlines
Deal found 1/25![American Airlines logo]()
$270
This American Airlines deal was found by Cheapflights users on 1/25. 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.
Thu 2/265:40 pm
PWM
- DEN
1 stop6h 57m
American Airlines
Tue 3/312:33 pm
DEN
- PWM
2 stops9h 17m
American Airlines
Deal found 1/25![American Airlines logo]()
$275
This Southwest deal was found by Cheapflights users on 1/24. 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.
Mon 2/233:55 pm
PWM
- DEN
1 stop8h 45m
Southwest
Mon 3/25:30 am
DEN
- PWM
1 stop7h 45m
Southwest
Deal found 1/24![Southwest logo]()
$289
This American Airlines deal was found by Cheapflights users on 1/24. 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 3/1712:44 pm
PWM
- DEN
2 stops11h 53m
American Airlines
Tue 3/246:50 am
DEN
- PWM
1 stop8h 17m
American Airlines
Deal found 1/24![American Airlines logo]()
$294
This American Airlines deal was found by Cheapflights users on 1/25. 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 2/115:20 am
PWM
- DEN
2 stops11h 10m
American Airlines
Tue 2/178:00 am
DEN
- PWM
1 stop7h 07m
American Airlines
Deal found 1/25![American Airlines logo]()
$310
This Delta deal was found by Cheapflights users on 1/26. 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.
Thu 4/24:48 pm
PWM
- DEN
1 stop6h 40m
Delta
Tue 4/76:10 am
DEN
- PWM
1 stop7h 56m
Delta
Deal found 1/26![Delta logo]()
$314
This Southwest deal was found by Cheapflights users on 1/24. 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.
Thu 3/195:30 am
PWM
- DEN
1 stop8h 00m
Southwest
Mon 3/2311:55 pm
DEN
- PWM
1 stop10h 00m
Southwest
Deal found 1/24![Southwest logo]()
$320
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 January 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $251 (American Airlines) |
One-way from | $113 (JetBlue) |
Popular in | June |
Cheapest in | October |
Average price | $403 |
Good round-trip deal | $531 or less |
Good one-way deal | $191 or less |
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 January 26, 2026.
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
Wed 2/18
5:40 pm-10:37 pm
1 stop6h 57m
Denver Intl
Thu 2/26
7:00 am-5:07 pm
1 stop8h 07m
$270
PortlandDenver
PWM - DEN
PWMDEN
Portland
Sat 2/28
5:57 pm-10:37 pm
1 stop6h 40m
Denver Intl
Fri 3/6
7:00 am-5:07 pm
1 stop8h 07m
$270
PortlandDenver
PWM - DEN
PWMDEN
Portland
Tue 3/17
4:23 pm-9:55 pm
1 stop7h 32m
Denver Intl
Tue 3/24
6:00 am-3:14 pm
1 stop7h 14m
$289
PortlandDenver
PWM - DEN
PWMDEN
Portland
Tue 7/7
2:35 pm-10:49 pm
1 stop10h 14m
Denver Intl
Mon 7/13
12:59 am-12:22 pm
1 stop9h 23m
$289
PortlandDenver
PWM - DEN
PWMDEN
Portland
Wed 4/1
4:48 pm-9:28 pm
1 stop6h 40m
Denver Intl
Sat 4/11
6:10 am-4:06 pm
1 stop7h 56m
$289
PortlandDenver
PWM - DEN
PWMDEN
Portland
Thu 4/2
6:25 am-11:25 am
1 stop7h 00m
Denver Intl
Tue 4/7
6:10 am-4:06 pm
1 stop7h 56m
$314
PortlandDenver
PWM - DEN
PWMDEN
Portland
Mon 2/23
3:55 pm-10:40 pm
1 stop8h 45m
Denver Intl
Mon 3/2
10:40 am-10:45 pm
2 stops10h 05m
$315
PortlandDenver
PWM - DEN
PWMDEN
Portland
Fri 7/24
12:40 pm-9:17 am
1 stop22h 37m
Denver Intl
Sun 8/9
10:03 am-11:44 am
1 stop23h 41m
$315
PortlandDenver
PWM - DEN
PWMDEN
Portland
Thu 2/26
11:50 am-7:20 pm
2 stops9h 30m
Denver Intl
Mon 3/2
5:30 am-3:15 pm
1 stop7h 45m
$315
PortlandDenver
PWM - DEN
PWMDEN
Portland
Thu 3/19
5:30 am-11:30 am
1 stop8h 00m
Denver Intl
Mon 3/23
11:55 pm-11:55 am
1 stop10h 00m
$320
Showing 1-10 of 20 results
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 January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star |
- 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 Expedia the most. Expedia 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 January 23, 2026.
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, 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 August is currently the most expensive (average of $169). 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 January 26, 2026.
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.
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
Traveling to a place near Denver?
Book flights to Denver if you plan to visit one of these locationsThornton
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Cripple Creek
Winter Park
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Glendale
Manitou Springs
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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.
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 January 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$87 | Average$256 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$226 | Average$341 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$256 | Average$373 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$256 | Average$355 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$288 | Average$446 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$294 | Average$531 | FlexibilityNo cancel fee | On-time69% |