What airlines fly to Colorado?

United Airlines, JetBlue and Delta are the top three most popular airlines that fly to Colorado from Portland, Maine according to our data. United Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 7 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Portland to Colorado?

United Airlines, Southwest, and Delta are the most popular carriers operating from Portland to Colorado

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?

The number of operators available for flights from Portland Airport to Colorado is 5 as of February 2026.

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.

$129 Cheap Flights from Portland to Colorado in 2026

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Find the cheapest flights from Portland, Maine to Colorado

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:50 pm - 9:30 pm

PWM

DEN

8h 40m

1 stop

5:15 am - 3:20 pm

DEN

PWM

8h 05m

1 stop

$247Southwest

Mon, Apr 13 - Wed, Apr 15

3:23 pm - 6:02 pm

PWM

DEN

4h 39mnonstop

9:45 am - 3:41 pm

DEN

PWM

3h 56mnonstop

$269United Airlines

Wed, May 6 - Sat, May 9

4:50 pm - 9:30 pm

PWM

DEN

6h 40m

1 stop

10:55 am - 10:35 pm

DEN

PWM

9h 40m

2 stops

$273Southwest

Mon, Apr 13 - Wed, Apr 15

11:29 am - 10:29 pm

PWM

DEN

13h 00m

2 stops

3:45 pm - 4:16 pm

DEN

PWM

22h 31m

1 stop

$278Multiple Airlines

Mon, May 4 - Fri, May 8

3:23 pm - 6:02 pm

PWM

DEN

4h 39mnonstop

6:00 am - 2:14 pm

DEN

PWM

6h 14m

1 stop

$279United Airlines

Wed, May 6 - Sat, May 9

6:26 pm - 8:55 am

PWM

DEN

16h 29m

1 stop

11:59 pm - 7:16 pm

DEN

PWM

17h 17m

2 stops

$284Multiple Airlines

Wed, May 6 - Sat, May 9

6:01 pm - 11:59 pm

PWM

DEN

7h 58m

1 stop

11:59 pm - 11:15 am

DEN

PWM

9h 16m

1 stop

$294American Airlines

Mon, Apr 13 - Sun, Apr 19

6:17 am - 11:56 am

PWM

COS

7h 39m

1 stop

12:22 pm - 11:27 pm

COS

PWM

9h 05m

1 stop

$295American Airlines

Wed, Apr 1 - Wed, Apr 8

12:55 pm - 9:27 pm

PWM

COS

10h 32m

2 stops

1:55 pm - 11:09 pm

COS

PWM

7h 14m

1 stop

$339Delta

Fri, May 29 - Wed, Jun 3

12:55 pm - 9:27 pm

PWM

COS

10h 32m

2 stops

1:55 pm - 11:09 pm

COS

PWM

7h 14m

1 stop

$352Delta

Fri, May 29 - Wed, Jun 3

United Airlines flights from Portland, Maine to Colorado

Our best United Airlines deals on Portland, Maine to Colorado flight tickets

United Airlines

May 6

PWM3:23 pmPortland

4h 39m

DEN6:02 pmDenver Intl

May 9

DEN9:45 amDenver Intl

3h 56m

PWM3:41 pmPortland

$269

United Airlines

May 6

PWM3:23 pmPortland

4h 39m

DEN6:02 pmDenver Intl

May 9

DEN6:00 amDenver Intl

6h 14m

1 stop

PWM2:14 pmPortland

$279

United Airlines

May 2

PWM3:39 pmPortland

7h 56m

1 stop

DEN9:35 pmDenver Intl

May 9

DEN3:52 pmDenver Intl

6h 07m

1 stop

PWM11:59 pmPortland

$289

Southwest flights from Portland, Maine to Colorado

Our best Southwest deals on Portland, Maine to Colorado flight tickets

Southwest

Apr 13

PWM2:50 pmPortland

8h 40m

1 stop

DEN9:30 pmDenver Intl

Apr 15

DEN5:15 amDenver Intl

8h 05m

1 stop

PWM3:20 pmPortland

$247

Southwest

Apr 13

PWM4:50 pmPortland

6h 40m

1 stop

DEN9:30 pmDenver Intl

Apr 15

DEN10:55 amDenver Intl

9h 40m

2 stops

PWM10:35 pmPortland

$273

Southwest

Apr 13

PWM2:50 pmPortland

10h 10m

2 stops

DEN11:00 pmDenver Intl

Apr 15

DEN10:55 amDenver Intl

9h 40m

2 stops

PWM10:35 pmPortland

$306

momondo Fare Finder

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 4/13

2:50 pm-9:30 pm

1 stop8h 40m

Denver Intl

Wed 4/15

5:15 am-3:20 pm

1 stop8h 05m

$247

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 5/6

3:23 pm-6:02 pm

Nonstop4h 39m

Denver Intl

Sat 5/9

9:45 am-3:41 pm

Nonstop3h 56m

$269

PortlandDenver

PWM - DEN

PWMDEN

Portland

Mon 4/13

4:50 pm-9:30 pm

1 stop6h 40m

Denver Intl

Wed 4/15

10:55 am-10:35 pm

2 stops9h 40m

$273

PortlandDenver

PWM - DEN

PWMDEN

Portland

Mon 5/4

11:29 am-10:29 pm

2 stops13h 00m

Denver Intl

Fri 5/8

3:45 pm-4:16 pm

1 stop22h 31m

$278

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 5/6

3:23 pm-6:02 pm

Nonstop4h 39m

Denver Intl

Sat 5/9

6:00 am-2:14 pm

1 stop6h 14m

$279

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 5/6

6:26 pm-8:55 am

1 stop16h 29m

Denver Intl

Sat 5/9

11:59 pm-7:16 pm

2 stops17h 17m

$284

PortlandDenver

PWM - DEN

PWMDEN

Portland

Mon 4/13

6:01 pm-11:59 pm

1 stop7h 58m

Denver Intl

Sun 4/19

11:59 pm-11:15 am

1 stop9h 16m

$294

PortlandColorado Springs

PWM - COS

PWMCOS

Portland

Wed 4/1

6:17 am-11:56 am

1 stop7h 39m

Colorado Springs

Wed 4/8

12:22 pm-11:27 pm

1 stop9h 05m

$295

PortlandColorado Springs

PWM - COS

PWMCOS

Portland

Fri 5/29

12:55 pm-9:27 pm

2 stops10h 32m

Colorado Springs

Wed 6/3

1:55 pm-11:09 pm

1 stop7h 14m

$339

PortlandColorado Springs

PWM - COS

PWMCOS

Portland

Fri 5/29

12:55 pm-9:27 pm

2 stops10h 32m

Colorado Springs

Wed 6/3

1:55 pm-11:09 pm

1 stop7h 14m

$352

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest month to fly to Colorado?

The month of April is, on average, the cheapest month to fly to Colorado from Portland, Maine, with most prices found around $392. The month of October is another great option to travel to Colorado, with average flight prices from Portland, Maine averaging around $399.

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 $503. 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 $749.

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 afternoon when flights can be purchased for as low as $567. 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 $443 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 $386 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 20% 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	$223
Fastest flight time	4h 37m
Direct flights	Every day
Airports in Colorado	87 airports

The best one-way flight to Colorado from Portland, Maine in the past 72 hours is $223. The best round-trip flight deal from Portland, Maine to Colorado found on momondo in the last 72 hours is $388.

The fastest flight from Portland, Maine to Colorado takes 4h 37m

Direct flights go from Portland, Maine to Colorado every day.

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?
The number of operators available for flights from Portland Airport to Colorado is 5 as of February 2026.
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?
Based on momondo bookings for flights between Portland, Maine and Colorado, the leading plane model is Boeing 737-800, making up 37.93% of the total bookings. Other popular models include Boeing 737 MAX 8 with 10.34%, Boeing 737-700 with 10.34%, and Airbus A320-100/200 with 10.34%.

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
JetBlue	PriceFrom $226	Free Cancellation	Rating 7.2 2,895 reviews	Search JetBlue flights
United Airlines	PriceFrom $248	Free Cancellation	Rating 7.4 9,362 reviews	Search United Airlines flights
American Airlines	PriceFrom $256	Free Cancellation	Rating 7.1 11,367 reviews	Search American Airlines flights
Delta	PriceFrom $256	Free Cancellation	Rating 7.9 8,245 reviews	Search Delta flights
Southwest	PriceFrom $286	Free Cancellation	Rating 8.0 4,303 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.