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Cheap flights from Portland, Maine to Denver from $129

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 8/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Portland, Maine to Denver

Cheap round-trip flights

JetBlue Logo
2:17 pm - 11:04 pmPWM-DEN
10h 47m1 stop
JetBlue Logo
11:25 am - 10:02 pmDEN-PWM
8h 37m1 stop
$247JetBlue
Find Deal
Mon, Oct 20 - Fri, Oct 24
United Airlines Logo
3:20 pm - 6:23 pmPWM-DEN
5h 03mnonstop
United Airlines Logo
10:05 am - 3:48 pmDEN-PWM
3h 43mnonstop
$269United Airlines
Find Deal
Tue, Nov 4 - Sat, Nov 8
JetBlue Logo
2:17 pm - 10:59 pmPWM-DEN
10h 42m1 stop
JetBlue Logo
11:25 am - 10:01 pmDEN-PWM
8h 36m1 stop
$270JetBlue
Find Deal
Fri, Oct 3 - Tue, Oct 7
Frontier Logo
6:58 pm - 8:02 amPWM-DEN
15h 04m1 stop
Frontier Logo
5:26 pm - 12:46 pmDEN-PWM
17h 20m1 stop
$275Frontier
Find Deal
Sat, Aug 16 - Fri, Aug 22
JetBlue Logo
2:19 pm - 10:59 pmPWM-DEN
10h 40m1 stop
JetBlue Logo
11:25 am - 10:02 pmDEN-PWM
8h 37m1 stop
$276JetBlue
Find Deal
Thu, Aug 28 - Thu, Sep 4
American Airlines Logo
5:57 pm - 10:54 pmPWM-DEN
6h 57m1 stop
American Airlines Logo
6:10 am - 5:49 pmDEN-PWM
9h 39m1 stop
$288American Airlines
Find Deal
Thu, Aug 21 - Sun, Aug 24
Southwest Logo
2:00 pm - 8:05 pmPWM-DEN
8h 05m2 stops
Southwest Logo
5:50 am - 2:55 pmDEN-PWM
7h 05m1 stop
$294Southwest
Find Deal
Thu, Aug 21 - Tue, Aug 26
American Airlines Logo
8:00 am - 4:42 pmPWM-DEN
10h 42m2 stops
American Airlines Logo
7:11 am - 8:11 pmDEN-PWM
11h 00m2 stops
$299American Airlines
Find Deal
Sat, Aug 30 - Wed, Sep 3
Southwest Logo
2:00 pm - 8:05 pmPWM-DEN
8h 05m2 stops
Southwest Logo
5:00 am - 7:10 pmDEN-PWM
12h 10m1 stop
$300Southwest
Find Deal
Thu, Sep 25 - Sun, Sep 28
Delta Logo
2:36 pm - 10:49 pmPWM-DEN
10h 13m1 stop
Delta Logo
11:59 pm - 2:01 pmDEN-PWM
12h 02m1 stop
$346Delta
Find Deal
Wed, Sep 10 - Sun, Sep 14

American Airlines flights from Portland, Maine to Denver

Our best American Airlines deals on Portland, Maine to Denver flight tickets
American Airlines
Aug 21
PWM5:57 pmPortland
6h 57m
1 stop
DEN10:54 pmDenver Intl
Aug 24
DEN6:10 amDenver Intl
9h 39m
1 stop
PWM5:49 pmPortland
$288
Find similar
American Airlines
Aug 30
PWM8:00 amPortland
10h 42m
2 stops
DEN4:42 pmDenver Intl
Sep 3
DEN7:11 amDenver Intl
11h 00m
2 stops
PWM8:11 pmPortland
$299
Find similar
American Airlines
Aug 20
PWM3:53 pmPortland
9h 02m
1 stop
DEN10:55 pmDenver Intl
Aug 29
DEN11:33 amDenver Intl
9h 26m
1 stop
PWM10:59 pmPortland
$314
Find similar

Sun Country Air flights from Portland, Maine to Denver

Our best Sun Country Air deals on Portland, Maine to Denver flight tickets
Sun Country Air
Aug 28
PWM12:54 pmPortland
24h 09m
1 stop
DEN11:03 amDenver Intl
Aug 31
DEN10:17 amDenver Intl
23h 23m
1 stop
PWM11:40 amPortland
$305
Find similar
Sun Country Air
Sep 25
PWM12:18 pmPortland
25h 27m
1 stop
DEN11:45 amDenver Intl
Oct 5
DEN8:00 amDenver Intl
6h 28m
1 stop
PWM4:28 pmPortland
$315
Find similar
Sun Country Air
Aug 11
PWM12:46 pmPortland
7h 23m
1 stop
DEN6:09 pmDenver Intl
Aug 14
DEN6:13 pmDenver Intl
15h 32m
1 stop
PWM11:45 amPortland
$397
Find similar

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 July 31, 2025.
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

PortlandDenver

PWM - DEN

PWMDEN

Portland

Mon 10/20

2:17 pm-11:04 pm

1 stop10h 47m

Denver Intl

Fri 10/24

11:25 am-10:02 pm

1 stop8h 37m

$247

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 11/4

3:20 pm-6:23 pm

Nonstop5h 03m

Denver Intl

Sat 11/8

10:05 am-3:48 pm

Nonstop3h 43m

$269

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 10/3

2:17 pm-10:59 pm

1 stop10h 42m

Denver Intl

Tue 10/7

11:25 am-10:01 pm

1 stop8h 36m

$270

PortlandDenver

PWM - DEN

PWMDEN

Portland

Sat 8/16

6:58 pm-8:02 am

1 stop15h 04m

Denver Intl

Fri 8/22

5:26 pm-12:46 pm

1 stop17h 20m

$275

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 8/28

2:19 pm-10:59 pm

1 stop10h 40m

Denver Intl

Thu 9/4

11:25 am-10:02 pm

1 stop8h 37m

$276

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 8/21

5:57 pm-10:54 pm

1 stop6h 57m

Denver Intl

Sun 8/24

6:10 am-5:49 pm

1 stop9h 39m

$288

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 8/21

2:00 pm-8:05 pm

2 stops8h 05m

Denver Intl

Tue 8/26

5:50 am-2:55 pm

1 stop7h 05m

$294

PortlandDenver

PWM - DEN

PWMDEN

Portland

Sat 8/30

8:00 am-4:42 pm

2 stops10h 42m

Denver Intl

Wed 9/3

7:11 am-8:11 pm

2 stops11h 00m

$299

PortlandDenver

PWM - DEN

PWMDEN

Portland

Thu 9/25

2:00 pm-8:05 pm

2 stops8h 05m

Denver Intl

Sun 9/28

5:00 am-7:10 pm

1 stop12h 10m

$300

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 9/10

2:36 pm-10:49 pm

1 stop10h 13m

Denver Intl

Sun 9/14

11:59 pm-2:01 pm

1 stop12h 02m

$346

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 cheapest month to fly to Denver?

The cheapest month to fly to Denver from Portland, Maine is in January. Flight prices, which tend to average around $347, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in January, then you should wait until April to fly from Portland, Maine, when ticket prices are also cheap, with an average price of $380.

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 Thursday when prices can be found for as low as $579. 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 $807.

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 evening when flights can be purchased for as low as $361. Flights in the morning are often more expensive with an average ticket price of $713.

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 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 $460 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 $362 on momondo.

What cabin class options are available on Portland to Denver Intl flights?

There are 4 cabin classes available to choose from on Portland to Denver Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of July 2025, prices for Portland, Maine to Denver flights are approximately 6% cheaper 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

$129

Fastest flight time

4h 25m

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 $129. The best round-trip flight deal from Portland, Maine to Denver found on momondo in the last 72 hours is $247.
The fastest flight from Portland, Maine to Denver takes 4h 25m
Direct flights go from Portland, Maine to Denver every day.
There is 1 airport near Denver: Denver Intl (DEN)
Search flight deals

  • 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 5h 03m.

  • 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
FrontierPriceFrom $149Free CancellationRating
5.9
3,239 reviews
Search Frontier flights
JetBluePriceFrom $226Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
DeltaPriceFrom $236Free CancellationRating
8.0
7,981 reviews
Search Delta flights
American AirlinesPriceFrom $256Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $294Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
United AirlinesPriceFrom $330Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights

  • United Airlines Flights From Portland, Maine to Denver

    United Airlines operates around 5 flights from Portland, Maine to Denver every week. The average price of these flights found in the last 72 hours has been $566, but momondo users have found United Airlines deals from Portland, Maine to Denver from as low as $330 round-trip. United Airlines has been scored 7.4/10 in 8,900 reviews.

Traveling to a place near Denver?

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

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

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