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

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

How many flights depart from Portland, Maine to Colorado on average per day?

As of September 2025, there are 1 flights per day flying from Portland, Maine to Colorado. The most common time of day flights depart is 3:00PM, with 66% of flights taking off in the afternoon.

How many flights depart from Portland, Maine to Colorado on average per week?

10 flights are operational weekly from Portland, Maine to Colorado as of September 2025. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.

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 41% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 8 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

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 6 as of September 2025.

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.

$97 Cheap Flights from Portland to Colorado in 2025/26

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Find the cheapest flights from Portland, Maine to Colorado

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

6:00 am - 12:35 pmPWM-COS

8h 35m1 stop

1:42 pm - 10:17 pmCOS-PWM

6h 35m1 stop

$277Delta

Find Deal

Sat, Dec 6 - Tue, Dec 9

6:00 am - 1:23 pmPWM-DEN

9h 23m2 stops

9:20 am - 8:18 pmDEN-PWM

8h 58m2 stops

$299American Airlines

Find Deal

Sat, Oct 25 - Tue, Oct 28

7:00 am - 1:23 pmPWM-DEN

8h 23m2 stops

11:03 am - 10:10 pmDEN-PWM

9h 07m1 stop

$300American Airlines

Find Deal

Tue, Oct 21 - Tue, Oct 28

1:16 pm - 9:16 pmPWM-DEN

10h 00m1 stop

7:23 am - 3:02 pmDEN-PWM

5h 39m1 stop

$301American Airlines

Find Deal

Tue, Mar 3 - Wed, Mar 4

3:20 pm - 6:23 pmPWM-DEN

5h 03mnonstop

1:50 pm - 11:09 pmDEN-PWM

7h 19m1 stop

$304United Airlines

Find Deal

Wed, Nov 19 - Wed, Dec 3

5:30 am - 1:55 pmPWM-DEN

10h 25m2 stops

5:30 am - 2:25 pmDEN-PWM

6h 55m1 stop

$306Southwest

Find Deal

Tue, Nov 4 - Fri, Nov 7

6:14 am - 10:35 amPWM-DEN

6h 21m1 stop

11:59 pm - 10:04 amDEN-PWM

8h 05m1 stop

$307United Airlines

Find Deal

Tue, Oct 21 - Tue, Oct 28

12:45 pm - 6:00 pmPWM-DEN

7h 15m1 stop

11:55 pm - 12:10 pmDEN-PWM

10h 15m1 stop

$312Southwest

Find Deal

Tue, Nov 4 - Tue, Nov 4

2:36 pm - 9:21 pmPWM-DEN

8h 45m1 stop

12:16 am - 5:25 pmDEN-PWM

15h 09m2 stops

$323Multiple Airlines

Find Deal

Fri, Oct 31 - Sun, Nov 2

10:49 am - 7:26 pmPWM-DEN

34h 37m2 stops

11:07 am - 10:41 amDEN-PWM

21h 34m1 stop

$328Multiple Airlines

Find Deal

Sun, Nov 16 - Thu, Dec 4

United Airlines flights from Portland, Maine to Colorado

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

United Airlines

Nov 19

PWM3:20 pmPortland

5h 03m

DEN6:23 pmDenver Intl

Dec 3

DEN1:50 pmDenver Intl

7h 19m

1 stop

PWM11:09 pmPortland

$304

Find similar

United Airlines

Oct 21

PWM6:14 amPortland

6h 21m

1 stop

DEN10:35 amDenver Intl

Oct 28

DEN11:59 pmDenver Intl

8h 05m

1 stop

PWM10:04 amPortland

$307

Find similar

United Airlines

Nov 12

PWM6:00 amPortland

12h 54m

2 stops

GJT4:54 pmGrand Junction Regnl

Nov 19

GJT7:00 amGrand Junction Regnl

6h 48m

1 stop

PWM3:48 pmPortland

$314

Find similar

American Airlines flights from Portland, Maine to Colorado

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

American Airlines

Oct 25

PWM6:00 amPortland

9h 23m

2 stops

DEN1:23 pmDenver Intl

Oct 28

DEN9:20 amDenver Intl

8h 58m

2 stops

PWM8:18 pmPortland

$299

Find similar

American Airlines

Oct 21

PWM7:00 amPortland

8h 23m

2 stops

DEN1:23 pmDenver Intl

Oct 28

DEN11:03 amDenver Intl

9h 07m

1 stop

PWM10:10 pmPortland

$300

Find similar

American Airlines

Mar 3

PWM1:16 pmPortland

10h 00m

1 stop

DEN9:16 pmDenver Intl

Mar 4

DEN7:23 amDenver Intl

5h 39m

1 stop

PWM3:02 pmPortland

$301

Find similar

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

PortlandColorado Springs

PWM - COS

PWMCOS

Portland

Sat 12/6

6:00 am-12:35 pm

1 stop8h 35m

Colorado Springs

Tue 12/9

1:42 pm-10:17 pm

1 stop6h 35m

$277

PortlandDenver

PWM - DEN

PWMDEN

Portland

Sat 10/25

6:00 am-1:23 pm

2 stops9h 23m

Denver Intl

Tue 10/28

9:20 am-8:18 pm

2 stops8h 58m

$299

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 10/21

7:00 am-1:23 pm

2 stops8h 23m

Denver Intl

Tue 10/28

11:03 am-10:10 pm

1 stop9h 07m

$300

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 3/3

1:16 pm-9:16 pm

1 stop10h 00m

Denver Intl

Wed 3/4

7:23 am-3:02 pm

1 stop5h 39m

$301

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 11/19

3:20 pm-6:23 pm

Nonstop5h 03m

Denver Intl

Wed 12/3

1:50 pm-11:09 pm

1 stop7h 19m

$304

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 11/4

5:30 am-1:55 pm

2 stops10h 25m

Denver Intl

Fri 11/7

5:30 am-2:25 pm

1 stop6h 55m

$306

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 10/21

6:14 am-10:35 am

1 stop6h 21m

Denver Intl

Tue 10/28

11:59 pm-10:04 am

1 stop8h 05m

$307

PortlandDenver

PWM - DEN

PWMDEN

Portland

Tue 11/4

12:45 pm-6:00 pm

1 stop7h 15m

Denver Intl

Tue 11/4

11:55 pm-12:10 pm

1 stop10h 15m

$312

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 10/31

2:36 pm-9:21 pm

1 stop8h 45m

Denver Intl

Sun 11/2

12:16 am-5:25 pm

2 stops15h 09m

$323

PortlandDenver

PWM - DEN

PWMDEN

Portland

Sun 11/16

10:49 am-7:26 pm

2 stops34h 37m

Denver Intl

Thu 12/4

11:07 am-10:41 am

1 stop21h 34m

$328

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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

Other information

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 $347. The month of April is another great option to travel to Colorado, with average flight prices from Portland, Maine averaging around $373.

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 $560. 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 $787.

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 $453 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 $354 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 30% 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	$299
Fastest flight time	4h 25m
Direct flights	Every day
Airports in Colorado	1 airport

The best one-way flight to Colorado from Portland, Maine in the past 72 hours is $299. The best round-trip flight deal from Portland, Maine to Colorado found on momondo in the last 72 hours is $374.

The fastest flight from Portland, Maine to Colorado takes 4h 25m

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

There is 1 airport near Colorado: 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 6 as of September 2025.
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 77.58% of the total bookings. Other popular models include Airbus A319 with 4.24%, Airbus A320-100/200 with 3.64%, and Airbus A321-100/200 with 3.03%.

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
Frontier	PriceFrom $149	Free Cancellation	Rating 5.8 3,173 reviews	Search Frontier flights
JetBlue	PriceFrom $226	Free Cancellation	Rating 7.2 2,914 reviews	Search JetBlue flights
American Airlines	PriceFrom $256	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $256	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
Southwest	PriceFrom $302	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
United Airlines	PriceFrom $308	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines 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.

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Find better results for your trip to Colorado

Popular cities in Colorado

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Cheap flights from Portland, Maine to Colorado from $97

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 12/16. 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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Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Find the cheapest flights from Portland, Maine to Colorado

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

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United Airlines flights from Portland, Maine to Colorado

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

American Airlines flights from Portland, Maine to Colorado

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

momondo Fare Finder

Use the filters below to find and compare flights from Portland, Maine to Colorado that are best for you.

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 $347. The month of April is another great option to travel to Colorado, with average flight prices from Portland, Maine averaging around $373.

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

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?

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 30% on your flight if you consider stops on a Portland, Maine to Colorado flight.

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

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

What airlines fly to Colorado?

How many flights depart from Portland, Maine to Colorado on average per day?

As of September 2025, there are 1 flights per day flying from Portland, Maine to Colorado. The most common time of day flights depart is 3:00PM, with 66% of flights taking off in the afternoon.

How many flights depart from Portland, Maine to Colorado on average per week?

10 flights are operational weekly from Portland, Maine to Colorado as of September 2025. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.

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

Fastest flight time

Direct flights

Airports in Colorado

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

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?

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

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

Why use momondo?

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

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

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

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

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Colorado

Popular cities in Colorado

Popular flights according to clicks in the last 7 days on momondo