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Cheap flights from Portland, Maine to Denver from $149

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to Denver departing on 6/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Portland, Maine to Denver

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:05 am - 3:32 pm
PWM
-
DEN
9h 27m
2 stops
American Airlines Logo
11:59 pm - 10:32 am
DEN
-
PWM
8h 33m
1 stop
$354American Airlines
Wed, May 27 - Mon, Jun 1
United Airlines Logo
3:31 pm - 6:10 pm
PWM
-
DEN
4h 39mnonstop
United Airlines Logo
11:59 pm - 9:11 am
DEN
-
PWM
7h 12m
1 stop
$358United Airlines
Fri, Jun 5 - Sun, Jun 7
Multiple Airlines Logo
12:47 pm - 11:07 pm
PWM
-
DEN
12h 20m
1 stop
Multiple Airlines Logo
10:00 am - 4:16 pm
DEN
-
PWM
28h 16m
2 stops
$359Multiple Airlines
Thu, May 28 - Tue, Jun 2
United Airlines Logo
3:31 pm - 6:10 pm
PWM
-
DEN
4h 39mnonstop
United Airlines Logo
11:59 pm - 9:11 am
DEN
-
PWM
7h 12m
1 stop
$360United Airlines
Tue, May 26 - Tue, Jun 2
Southwest Logo
7:40 am - 1:50 pm
PWM
-
DEN
8h 10m
1 stop
Southwest Logo
5:15 am - 3:00 pm
DEN
-
PWM
7h 45m
1 stop
$363Southwest
Fri, Sep 25 - Mon, Sep 28
Southwest Logo
5:20 pm - 11:40 pm
PWM
-
DEN
8h 20m
2 stops
Southwest Logo
11:50 pm - 9:45 am
DEN
-
PWM
7h 55m
1 stop
$364Southwest
Fri, Jun 5 - Sun, Jun 7
Southwest Logo
10:30 am - 5:45 pm
PWM
-
DEN
9h 15m
2 stops
Southwest Logo
5:15 am - 3:00 pm
DEN
-
PWM
7h 45m
1 stop
$368Southwest
Thu, Sep 24 - Mon, Sep 28
American Airlines Logo
5:58 pm - 10:59 pm
PWM
-
DEN
7h 01m
1 stop
American Airlines Logo
2:22 pm - 12:40 am
DEN
-
PWM
8h 18m
1 stop
$369American Airlines
Tue, Jun 9 - Sat, Jun 13
American Airlines Logo
2:54 pm - 7:32 pm
PWM
-
DEN
6h 38m
1 stop
American Airlines Logo
12:27 pm - 11:41 pm
DEN
-
PWM
9h 14m
2 stops
$374American Airlines
Fri, Sep 11 - Tue, Sep 22
Multiple Airlines Logo
6:26 pm - 4:30 pm
PWM
-
DEN
24h 04m
1 stop
Multiple Airlines Logo
11:54 pm - 3:59 pm
DEN
-
PWM
14h 05m
2 stops
$375Multiple Airlines
Wed, Jun 3 - Mon, Jun 8

United Airlines flights from Portland, Maine to Denver

Our best United Airlines deals on Portland, Maine to Denver flight tickets
United Airlines
Jun 5
PWM3:31 pmPortland
4h 39m
DEN6:10 pmDenver Intl
Jun 7
DEN11:59 pmDenver Intl
7h 12m
1 stop
PWM9:11 amPortland
$358
United Airlines
May 26
PWM3:31 pmPortland
4h 39m
DEN6:10 pmDenver Intl
Jun 2
DEN11:59 pmDenver Intl
7h 12m
1 stop
PWM9:11 amPortland
$360
United Airlines
Jun 12
PWM3:31 pmPortland
4h 39m
DEN6:10 pmDenver Intl
Jun 16
DEN6:00 amDenver Intl
6h 29m
1 stop
PWM2:29 pmPortland
$391

American Airlines flights from Portland, Maine to Denver

Our best American Airlines deals on Portland, Maine to Denver flight tickets
American Airlines
May 27
PWM8:05 amPortland
9h 27m
2 stops
DEN3:32 pmDenver Intl
Jun 1
DEN11:59 pmDenver Intl
8h 33m
1 stop
PWM10:32 amPortland
$354
American Airlines
Jun 9
PWM5:58 pmPortland
7h 01m
1 stop
DEN10:59 pmDenver Intl
Jun 13
DEN2:22 pmDenver Intl
8h 18m
1 stop
PWM12:40 amPortland
$369
American Airlines
Sep 11
PWM3:03 pmPortland
8h 54m
1 stop
DEN9:57 pmDenver Intl
Sep 19
DEN7:30 amDenver Intl
7h 28m
2 stops
PWM4:58 pmPortland
$374

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine 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, momondo users made 832,500 searches. Data last updated May 10, 2026.
Use the filters below to find and compare flights from Portland, Maine to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 5/27

8:05 am-3:32 pm

2 stops9h 27m

Denver Intl

Mon 6/1

11:59 pm-10:32 am

1 stop8h 33m

$354
Quickest round-trip

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 6/5

3:31 pm-6:10 pm

Nonstop4h 39m

Denver Intl

Sun 6/7

11:59 pm-9:11 am

1 stop7h 12m

$358

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 5/28

12:47 pm-11:07 pm

1 stop12h 20m

Denver Intl

Tue 6/2

10:00 am-4:16 pm

2 stops28h 16m

$359

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 5/26

3:31 pm-6:10 pm

Nonstop4h 39m

Denver Intl

Tue 6/2

11:59 pm-9:11 am

1 stop7h 12m

$360

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 9/25

7:40 am-1:50 pm

1 stop8h 10m

Denver Intl

Mon 9/28

5:15 am-3:00 pm

1 stop7h 45m

$363

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 6/5

5:20 pm-11:40 pm

2 stops8h 20m

Denver Intl

Sun 6/7

11:50 pm-9:45 am

1 stop7h 55m

$364

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 9/24

10:30 am-5:45 pm

2 stops9h 15m

Denver Intl

Mon 9/28

5:15 am-3:00 pm

1 stop7h 45m

$368

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 6/9

5:58 pm-10:59 pm

1 stop7h 01m

Denver Intl

Sat 6/13

2:22 pm-12:40 am

1 stop8h 18m

$369

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 9/11

2:54 pm-7:32 pm

1 stop6h 38m

Denver Intl

Tue 9/22

12:27 pm-11:41 pm

2 stops9h 14m

$374

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 6/3

6:26 pm-4:30 pm

1 stop24h 04m

Denver Intl

Mon 6/8

11:54 pm-3:59 pm

2 stops14h 05m

$375

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Denver from

How to get the cheapest flight ticket from Portland, Maine to Denver

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Portland, Maine and Denver?

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Portland, Maine is in February. Flight prices, which tend to average around $374, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in February, then you should wait until November to fly from Portland, Maine, when ticket prices are also cheap, with an average price of $399.

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart on your flight to Denver is on a Friday when prices can be found for as low as $490. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $762.

What is the cheapest time of day to depart on your flight to Denver?

The cheapest time of day to fly to Denver is in the afternoon when flights can be purchased for as low as $546. Flights in the morning are often more expensive with an average ticket price of $878.

What is the cheapest Portland to Denver Intl flight route?

Fly from Portland to Denver Intl for the best Portland - Denver Intl flight prices

How far in advance should I book a flight from Portland, Maine to Denver?

You are more likely to see cheaper flights to Denver from Portland, Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $445 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Portland, Maine for as low as $386 on momondo.

How have Portland, Maine to Denver flight prices changed over time?

As of May 2026, prices for Portland, Maine to Denver flights are approximately 17% more expensive when compared to flights at the same time last year.

When to book flights from Portland, Maine to Denver

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to Denver according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland, Maine to Denver (PWM to DEN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to Denver

Best Price Found

$276

Fastest flight time

4h 33m

Direct flights

Every day

Airports in Denver

1 airport
The best one-way flight to Denver from Portland, Maine in the past 72 hours is $276. The best round-trip flight deal from Portland, Maine to Denver found on momondo in the last 72 hours is $469.
The fastest flight from Portland, Maine to Denver takes 4h 33m
Direct flights go from Portland, Maine to Denver every day.
There is 1 airport in Denver. From Portland, Maine there are direct flights to Denver Intl (DEN).
Search flight deals

Frequently asked questions about flying from Portland, Maine to Denver

  • How far is Portland to Denver Intl by plane?

    There are 1797.3 mi between Portland and Denver Intl. In terms of flight time, this usually takes a little over 4h 33m.

  • When did momondo last update prices for flights from Portland Airport to Denver Intl Airport?

    Prices for flights from Portland Airport to Denver Intl Airport refresh daily.

  • How many operators does momondo search for flights from Portland Airport to Denver Intl Airport?

  • How old do you have to be to fly from Portland Airport to Denver Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Denver Intl Airport.

  • What documentation or ID do you need to fly to Denver Intl Airport?

    The required travel and health documents for your Denver Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Denver Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Portland, Maine to Denver?

  • What is the most popular airline from Portland, Maine to Denver?

Best airlines flying from Portland, Maine to Denver

Compare and see reviews for airlines that fly from Portland, Maine to Denver with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $242Free CancellationRating
7.2
2,974 reviews
Search JetBlue flights
DeltaPriceFrom $256Free CancellationRating
7.9
8,455 reviews
Search Delta flights
American AirlinesPriceFrom $268Free CancellationRating
7.1
11,674 reviews
Search American Airlines flights
SouthwestPriceFrom $272Free CancellationRating
7.9
4,301 reviews
Search Southwest flights
United AirlinesPriceFrom $292Free CancellationRating
7.4
9,698 reviews
Search United Airlines flights

  • United Airlines Flights From Portland, Maine to Denver

    United Airlines operates around 7 flights from Portland, Maine to Denver every week. The average price of these flights found in the last 72 hours has been $489, but momondo users have found United Airlines deals from Portland, Maine to Denver from as low as $292 round-trip. United Airlines has been scored 7.4/10 in 9,698 reviews.

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Breckenridge
Estes Park
Black Hawk
Aurora
Fort Collins
Manitou Springs
Longmont
Boulder
Greeley
Keystone
Lakewood
Cripple Creek
Westminster
Thornton
Frisco
Centennial
Englewood
Winter Park
Grand Lake
Copper Mountain

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Denver?

It is quick and easy to find Portland to Denver flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Denver that suits you.

Can I find flights from Portland to Denver with flexible booking policies on momondo?

All flight searches from Portland to Denver on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Portland to Denver?

Once all potential Portland to Denver flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Portland to Denver right now. Can momondo alert me if prices change?

Price alerts on flights to Denver from Portland are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Denver trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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