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Cheap flights from Portland, Maine to Colorado from $145

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 Colorado departing on 1/18. 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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Cheap round-trip flights

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Multiple Airlines Logo
5:06 pm - 2:06 pm
PWM
-
DEN
23h 00m2 stops
Multiple Airlines Logo
11:59 pm - 9:07 am
DEN
-
PWM
31h 08m1 stop
$250Multiple Airlines
Mon, Feb 9 - Sat, Feb 14
American Airlines Logo
3:58 pm - 10:24 pm
PWM
-
DEN
8h 26m1 stop
American Airlines Logo
11:29 am - 10:07 pm
DEN
-
PWM
8h 38m1 stop
$251American Airlines
Tue, Jan 20 - Wed, Jan 28
American Airlines Logo
3:40 pm - 9:42 pm
PWM
-
DEN
8h 02m1 stop
American Airlines Logo
6:59 am - 6:03 pm
DEN
-
PWM
9h 04m1 stop
$252American Airlines
Wed, Feb 25 - Wed, Mar 4
American Airlines Logo
12:46 pm - 8:53 pm
PWM
-
DEN
10h 07m2 stops
American Airlines Logo
6:00 am - 3:31 pm
DEN
-
PWM
7h 31m1 stop
$256American Airlines
Tue, Jan 20 - Wed, Jan 28
American Airlines Logo
5:20 am - 2:14 pm
PWM
-
DEN
10h 54m2 stops
American Airlines Logo
8:44 am - 11:43 pm
DEN
-
PWM
12h 59m2 stops
$261American Airlines
Tue, Jan 20 - Wed, Jan 28
American Airlines Logo
3:58 pm - 9:11 pm
PWM
-
DEN
7h 13m1 stop
American Airlines Logo
11:29 am - 10:07 pm
DEN
-
PWM
8h 38m1 stop
$270American Airlines
Mon, Jan 26 - Tue, Feb 3
United Airlines Logo
3:30 pm - 6:08 pm
PWM
-
DEN
4h 38mnonstop
United Airlines Logo
11:50 pm - 10:24 am
DEN
-
PWM
8h 34m1 stop
$279United Airlines
Fri, May 8 - Mon, May 11
Delta Logo
1:35 pm - 8:23 pm
PWM
-
DEN
8h 48m1 stop
Delta Logo
12:59 am - 12:18 pm
DEN
-
PWM
9h 19m1 stop
$289Delta
Fri, May 8 - Tue, May 12
Delta Logo
5:30 am - 1:08 pm
PWM
-
MTJ
9h 38m1 stop
Delta Logo
2:05 pm - 10:27 pm
MTJ
-
PWM
6h 22m1 stop
$328Delta
Tue, Jan 13 - Tue, Jan 20
United Airlines Logo
5:45 am - 10:55 am
PWM
-
COS
7h 10m1 stop
United Airlines Logo
11:36 am - 9:09 pm
COS
-
PWM
7h 33m1 stop
$367United Airlines
Tue, Feb 24 - Wed, Feb 25

American Airlines flights from Portland, Maine to Colorado

Our best American Airlines deals on Portland, Maine to Colorado flight tickets
American Airlines
Jan 20
PWM3:58 pmPortland
8h 26m
1 stop
DEN10:24 pmDenver Intl
Jan 28
DEN11:29 amDenver Intl
8h 38m
1 stop
PWM10:07 pmPortland
$251
Find similar
American Airlines
Feb 25
PWM3:40 pmPortland
8h 02m
1 stop
DEN9:42 pmDenver Intl
Mar 4
DEN6:59 amDenver Intl
9h 04m
1 stop
PWM6:03 pmPortland
$252
Find similar
American Airlines
Jan 20
PWM12:46 pmPortland
10h 07m
2 stops
DEN8:53 pmDenver Intl
Jan 28
DEN6:00 amDenver Intl
7h 31m
1 stop
PWM3:31 pmPortland
$256
Find similar

United Airlines flights from Portland, Maine to Colorado

Our best United Airlines deals on Portland, Maine to Colorado flight tickets
United Airlines
May 8
PWM3:30 pmPortland
4h 38m
DEN6:08 pmDenver Intl
May 11
DEN11:50 pmDenver Intl
8h 34m
1 stop
PWM10:24 amPortland
$279
Find similar
United Airlines
May 1
PWM3:30 pmPortland
4h 38m
DEN6:08 pmDenver Intl
May 10
DEN9:40 amDenver Intl
3h 55m
PWM3:35 pmPortland
$347
Find similar
United Airlines
May 1
PWM9:37 amPortland
8h 15m
1 stop
DEN3:52 pmDenver Intl
May 10
DEN11:50 pmDenver Intl
8h 34m
1 stop
PWM10:24 amPortland
$351
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine to Colorado 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 December 27, 2025.
Use the filters below to find and compare flights from Portland, Maine to Colorado that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandDenver

PWM - DEN

PWMDEN

Portland

Mon 2/9

5:06 pm-2:06 pm

2 stops23h 00m

Denver Intl

Sat 2/14

11:59 pm-9:07 am

1 stop31h 08m

$250

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 1/20

3:58 pm-10:24 pm

1 stop8h 26m

Denver Intl

Wed 1/28

11:29 am-10:07 pm

1 stop8h 38m

$251

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 2/25

3:40 pm-9:42 pm

1 stop8h 02m

Denver Intl

Wed 3/4

6:59 am-6:03 pm

1 stop9h 04m

$252

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 1/20

12:46 pm-8:53 pm

2 stops10h 07m

Denver Intl

Wed 1/28

6:00 am-3:31 pm

1 stop7h 31m

$256

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 1/20

5:20 am-2:14 pm

2 stops10h 54m

Denver Intl

Wed 1/28

8:44 am-11:43 pm

2 stops12h 59m

$261

PortlandDenver

PWM - DEN

PWMDEN

Portland

Mon 1/26

3:58 pm-9:11 pm

1 stop7h 13m

Denver Intl

Tue 2/3

11:29 am-10:07 pm

1 stop8h 38m

$270

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 5/8

3:30 pm-6:08 pm

Nonstop4h 38m

Denver Intl

Mon 5/11

11:50 pm-10:24 am

1 stop8h 34m

$279

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 5/8

1:35 pm-8:23 pm

1 stop8h 48m

Denver Intl

Tue 5/12

12:59 am-12:18 pm

1 stop9h 19m

$289

PortlandMontrose

PWM - MTJ

PWMMTJ

Portland

Tue 1/13

5:30 am-1:08 pm

1 stop9h 38m

Montrose County

Tue 1/20

2:05 pm-10:27 pm

1 stop6h 22m

$328

PortlandColorado Springs

PWM - COS

PWMCOS

Portland

Tue 2/24

5:45 am-10:55 am

1 stop7h 10m

Colorado Springs

Wed 2/25

11:36 am-9:09 pm

1 stop7h 33m

$367

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 Colorado from

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

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 Colorado?

The month of January is, on average, the cheapest month to fly to Colorado from Portland, Maine, with most prices found around $386. The month of April is another great option to travel to Colorado, with average flight prices from Portland, Maine averaging around $386.

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

The cheapest day to depart from Portland, Maine to Colorado is on a Friday when prices can be found for as low as $496. On the other hand, Sunday is the most expensive day to depart from Portland, Maine because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $762.

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

The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $361. In the morning is when there is more demand to fly to Colorado, so prices are often more expensive at around $762 per ticket.

What is the cheapest Portland to Colorado flight route?

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

How far in advance should I book a flight to Colorado?

You are more likely to see cheaper flights to Colorado from Portland, Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to Colorado for around $440 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Colorado from Portland, Maine for as low as $382 on momondo.

What cabin class options are available on Portland to Colorado flights?

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

Can stopping save me money on Portland, Maine to Colorado flights?

You could potentially save up to 23% on your flight if you consider stops on a Portland, Maine to Colorado flight.

Cheap Portland, Maine to Colorado flight deals and tips

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

Best Price Found

$395

Fastest flight time

4h 38m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat

Airports in Colorado

87 airports
The best one-way flight to Colorado from Portland, Maine in the past 72 hours is $395. The best round-trip flight deal from Portland, Maine to Colorado found on momondo in the last 72 hours is $399.
The fastest flight from Portland, Maine to Colorado takes 4h 38m
Direct flights go from Portland, Maine to Colorado on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights.
There are 87 airports in Colorado. From Portland, Maine there are direct flights to Denver Intl (DEN).
Search flight deals

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

    Prices for flights from Portland Airport to Colorado are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Colorado.

  • What documentation or ID do you need to fly to Colorado?

    The required travel and health documents for your Colorado 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 Colorado. 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 Colorado?

Best airlines flying from Portland, Maine to Colorado

Compare and see reviews for airlines that fly from Portland, Maine to Colorado with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $151Free CancellationRating
5.8
3,070 reviews
Search Frontier flights
JetBluePriceFrom $226Free CancellationRating
7.2
2,900 reviews
Search JetBlue flights
American AirlinesPriceFrom $253Free CancellationRating
7.2
11,067 reviews
Search American Airlines flights
DeltaPriceFrom $256Free CancellationRating
7.9
8,016 reviews
Search Delta flights
United AirlinesPriceFrom $260Free CancellationRating
7.4
9,116 reviews
Search United Airlines flights
SouthwestPriceFrom $293Free CancellationRating
8.0
4,258 reviews
Search Southwest flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Colorado from Portland.

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

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

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Colorado from Portland.

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

Of course. momondo tracks the price of Portland to Colorado flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Colorado 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.
Start using Trips
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