$149+ Cheap flights from Portland, ME to Denver (PWM - DEN)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — DEN
Oct 4 — Oct 111
Round-trip
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 November or February, booked 68 days in advance, depart on a Tuesday or Thursday and return on a Saturday
Cheap flight deals from Portland to Denver
Cheapest
Best
Last-minute
One-way
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 September 4, 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 September 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 9/237:00 am -
1 stop12h 47m
Tue 9/2910:44 am -
2 stops32h 35m
Deal found 9/2![Multiple Airlines logo]()
$351
This Southwest deal was found by Cheapflights users on 9/3. 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 10/265:20 am -
1 stop6h 30m
Fri 10/306:00 am -
1 stop6h 50m
Deal found 9/3![Southwest logo]()
$352
This American Airlines deal was found by Cheapflights users on 9/1. 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 10/234:23 pm -
2 stops9h 35m
Mon 10/266:46 am -
1 stop8h 18m
Deal found 9/1![American Airlines logo]()
$353
This American Airlines deal was found by Cheapflights users on 8/31. 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 9/116:30 am -
1 stop9h 17m
Sat 9/1910:47 am -
2 stops8h 58m
Deal found 8/31![American Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 8/31. 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 11/43:23 pm -
Nonstop4h 51m
Mon 11/910:11 am -
Nonstop3h 51m
Deal found 8/31![United Airlines logo]()
$359
This Southwest deal was found by Cheapflights users on 9/3. 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 11/55:10 pm -
2 stops8h 00m
Mon 11/912:15 pm -
2 stops9h 35m
Deal found 9/3![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 9/1. 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 12/112:45 pm -
1 stop6h 50m
Wed 12/97:00 am -
1 stop5h 45m
Deal found 9/1![Southwest logo]()
$363
This American Airlines deal was found by Cheapflights users on 8/31. 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 9/53:06 pm -
2 stops9h 09m
Wed 9/97:26 am -
2 stops10h 12m
Deal found 8/31![American Airlines logo]()
$364
This United Airlines deal was found by Cheapflights users on 8/31. 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 11/48:47 am -
1 stop8h 30m
Tue 11/1010:11 am -
Nonstop3h 51m
Deal found 8/31![United Airlines logo]()
$365
This Southwest deal was found by Cheapflights users on 9/1. 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.
Fri 12/45:15 am -
2 stops9h 55m
Mon 12/77:00 am -
1 stop5h 45m
Deal found 9/1![Southwest logo]()
$368
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 12/212:28 pm -
1 stop10h 28m
Tue 12/84:00 pm -
1 stop24h 32m
Deal found 9/1![Multiple Airlines logo]()
$369
Best flights from Portland to DenverDiscover carefully curated flight deals from Portland to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 4, 2026.
Discover carefully curated flight deals from Portland to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 4, 2026.
This Southwest deal was found by Cheapflights users on 9/3. 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 10/265:30 pm -
2 stops8h 20m
Fri 10/305:50 am -
2 stops9h 05m
Deal found 9/3![Southwest logo]()
$362
This United Airlines deal was found by Cheapflights users on 8/31. 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 11/48:47 am -
1 stop8h 30m
Mon 11/96:00 am -
1 stop6h 27m
Deal found 8/31![United Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 8/31. 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 10/296:01 am -
1 stop9h 28m
Mon 11/26:35 am -
1 stop7h 00m
Deal found 8/31![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 8/30. 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.
Wed 10/286:28 am -
2 stops13h 24m
Sat 10/316:20 am -
1 stop7h 42m
Deal found 8/30![Delta logo]()
$384
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Thu 10/298:29 am -
1 stop8h 48m
Mon 11/210:11 am -
Nonstop3h 51m
Deal found 9/3![United Airlines logo]()
$434
This Southwest deal was found by Cheapflights users on 9/1. 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 11/235:20 am -
2 stops10h 15m
Fri 11/276:30 am -
2 stops8h 00m
Deal found 9/1![Southwest logo]()
$452
This United Airlines deal was found by Cheapflights users on 8/31. 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 10/283:23 pm -
Nonstop4h 51m
Sat 10/3110:11 am -
Nonstop3h 51m
Deal found 8/31![United Airlines logo]()
$459
Last-minute flights from Portland to DenverDiscover last-minute flight deals from Portland to Denver. Data last updated September 4, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Denver. Data last updated September 4, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/31. 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 9/53:06 pm -
2 stops9h 09m
Wed 9/97:26 am -
2 stops10h 12m
Deal found 8/31![American Airlines logo]()
$364
This American Airlines deal was found by Cheapflights users on 8/31. 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.
Sun 9/67:05 am -
1 stop7h 58m
Sun 9/132:45 pm -
1 stop6h 51m
Deal found 8/31![American Airlines logo]()
$373
This American Airlines deal was found by Cheapflights users on 8/31. 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 9/116:30 am -
1 stop9h 17m
Sat 9/1910:47 am -
2 stops8h 58m
Deal found 8/31![American Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 9/237:00 am -
1 stop12h 47m
Tue 9/2910:44 am -
2 stops32h 35m
Deal found 9/2![Multiple Airlines logo]()
$351
This Southwest deal was found by Cheapflights users on 9/1. 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 10/15:30 pm -
1 stop8h 25m
Mon 10/511:20 am -
2 stops8h 35m
Deal found 9/1![Southwest logo]()
$377
This American Airlines deal was found by Cheapflights users on 9/2. 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 10/144:29 pm -
1 stop8h 29m
Mon 11/22:59 pm -
1 stop5h 58m
Deal found 9/2![American Airlines logo]()
$378
This Delta deal was found by Cheapflights users on 8/31. 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.
Wed 10/146:04 am -
1 stop7h 00m
Mon 11/26:35 am -
1 stop7h 00m
Deal found 8/31![Delta logo]()
$379
This American Airlines deal was found by Cheapflights users on 9/1. 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 10/234:23 pm -
2 stops9h 35m
Mon 10/266:46 am -
1 stop8h 18m
Deal found 9/1![American Airlines logo]()
$353
This American Airlines deal was found by Cheapflights users on 9/4. 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 10/244:14 pm -
1 stop8h 44m
Sat 10/319:03 am -
1 stop6h 12m
Deal found 9/4![American Airlines logo]()
$381
This Southwest deal was found by Cheapflights users on 9/3. 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 10/265:20 am -
1 stop6h 30m
Fri 10/306:00 am -
1 stop6h 50m
Deal found 9/3![Southwest logo]()
$352
One-way flights from Portland to DenverSearch for one-way flight options from Portland to Denver. Find affordable one-way fares based on user searches. Data last updated September 4, 2026.
Search for one-way flight options from Portland to Denver. Find affordable one-way fares based on user searches. Data last updated September 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 12/512:28 pm -
1 stop10h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 8/30. 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 9/307:00 am -
1 stop12h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/30![Multiple Airlines logo]()
$152
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Thu 11/268:08 am -
1 stop9h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![United Airlines logo]()
$154
This Southwest deal was found by Cheapflights users on 8/31. 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 11/1612:45 pm -
1 stop8h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![Southwest logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 10/197:00 am -
2 stops27h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$168
This Southwest deal was found by Cheapflights users on 9/1. 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.
Fri 12/412:45 pm -
1 stop8h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Southwest logo]()
$174
This American Airlines deal was found by Cheapflights users on 8/31. 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 9/112:03 pm -
1 stop8h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![American Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 9/3. 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 10/75:40 am -
2 stops9h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Southwest logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 8/31. 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 11/165:35 pm -
3 stops29h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![Multiple Airlines logo]()
$180
This American Airlines deal was found by Cheapflights users on 8/31. 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 9/126:00 am -
2 stops10h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![American Airlines logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 10/77:00 am -
1 stop12h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Multiple Airlines logo]()
$185
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 September 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $351 (Kiwi.com) |
One-way from | $149 (Kiwi.com) |
Popular in | June |
Cheapest in | November |
Average price | $478 |
Good round-trip deal | $466 or less |
Good one-way deal | $330 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 7,457,451 searches. Data last updated September 4, 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
Cheapest round-trip
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Mon 2/1
5:35 am-1:10 pm
2 stops9h 35m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$164
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Fri 12/4
12:45 pm-7:25 pm
1 stop8h 40m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$174
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Wed 10/14
5:40 am-12:10 pm
2 stops8h 30m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$195
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Sat 10/24
6:00 am-12:45 pm
1 stop8h 45m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$209
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Wed 10/14
7:25 pm-12:30 am
1 stop7h 05m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$224
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Wed 12/30
5:20 pm-11:55 pm
1 stop8h 35m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$269
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Fri 10/16
6:04 am-8:13 pm
1 stop16h 09m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$294
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Thu 9/17
12:03 pm-4:51 pm
1 stop6h 48m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$313
Quickest round-trip
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Sat 9/19
12:55 pm-5:21 pm
1 stop6h 26m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$314
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Mon 10/26
5:30 pm-11:50 pm
2 stops8h 20m
Denver Intl
Fri 10/30
5:50 am-4:55 pm
2 stops9h 05m
$362
Showing 1-10 of 16 resultsSorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
- 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.
PWM-DEN
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?
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 $381). Flying from Portland, Maine to Denver in June is currently the most expensive (average of $599). 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 4, 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 September 4, 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.
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
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
Westminster
Lakewood
Black Hawk
Centennial
Broomfield
Golden
Wheat Ridge
Silverthorne
Central City
Fort Morgan
Greeley
Cripple Creek
Winter Park
Limon
Manitou Springs
Frisco
Englewood
Glendale
Evergreen
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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 7,457,451 searches. Data last updated September 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$164 | Average$381 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$269 | Average$438 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$288 | Average$388 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$294 | Average$486 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$322 | Average$509 | FlexibilityNo cancel fee | On-time63% |