What airlines fly to Denver?

United Airlines, JetBlue and Delta are the top three most popular airlines that fly to Denver from Portland, Maine according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 8 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Portland, Maine to Denver?

Flights connecting via Charlotte (CLT) have the shortest average one-way travel time: 6h 57m.

Which layover airport has the shortest connection time from Portland, Maine to Denver?

Atlanta (ATL) has the shortest average layover time for this route: 1h 09m.

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

1 flights are operational daily from Portland, Maine to Denver as of October 2025. The most popular departure time for this route is 3:00PM, with 87% of flights per day taking off in the afternoon.

Which layover airport offers the lowest fares from Portland, Maine to Denver?

Flights via Atlanta (ATL) offer the lowest average round-trip price of $272.

Which airport is the most popular layover for flights between Portland, Maine and Denver?

Washington, D.C. (IAD) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

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

As of October 2025, 10 flights take off from Portland, Maine and land in Denver each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.

What is the cheapest airline that flies from Portland to Denver Intl?

American Airlines, United Airlines, and Delta are the most popular carriers operating from Portland to Denver Intl

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?

As of October 2025, there are 6 operators available to choose from 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.

$118 Cheap Flights from Portland to Denver in 2025/26

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6:18 pm - 9:10 amPWM-DEN

16h 52m1 stop

12:11 pm - 10:41 amDEN-PWM

20h 30m1 stop

$287Multiple Airlines

Find Deal

Sat, Dec 6 - Sun, Dec 14

6:00 am - 2:04 pmPWM-DEN

10h 04m1 stop

6:15 am - 4:07 pmDEN-PWM

7h 52m1 stop

$289Delta

Find Deal

Wed, Nov 19 - Wed, Dec 3

5:30 am - 10:24 amPWM-DEN

6h 54m1 stop

10:05 am - 3:48 pmDEN-PWM

3h 43mnonstop

$292United Airlines

Find Deal

Mon, Nov 24 - Fri, Nov 28

3:52 pm - 11:18 pmPWM-DEN

9h 26m1 stop

10:21 am - 11:37 pmDEN-PWM

11h 16m2 stops

$294American Airlines

Find Deal

Wed, Nov 19 - Wed, Dec 3

12:26 pm - 10:22 pmPWM-DEN

11h 56m2 stops

6:00 am - 6:15 pmDEN-PWM

10h 15m2 stops

$299American Airlines

Find Deal

Wed, Nov 19 - Wed, Dec 3

12:45 pm - 7:20 pmPWM-DEN

8h 35m1 stop

5:30 am - 3:15 pmDEN-PWM

7h 45m1 stop

$301Southwest

Find Deal

Wed, Feb 11 - Tue, Feb 17

3:20 pm - 6:21 pmPWM-DEN

5h 01mnonstop

10:05 am - 3:48 pmDEN-PWM

3h 43mnonstop

$304United Airlines

Find Deal

Mon, Nov 24 - Fri, Nov 28

7:22 pm - 12:15 amPWM-DEN

6h 53m1 stop

11:50 pm - 9:19 amDEN-PWM

7h 29m1 stop

$313United Airlines

Find Deal

Sat, Nov 22 - Sun, Nov 30

3:20 pm - 6:21 pmPWM-DEN

5h 01mnonstop

11:50 pm - 9:19 amDEN-PWM

7h 29m1 stop

$314United Airlines

Find Deal

Fri, Nov 14 - Sat, Nov 22

5:30 am - 2:30 pmPWM-DEN

11h 00m2 stops

7:00 am - 2:55 pmDEN-PWM

5h 55m1 stop

$329Southwest

Find Deal

Wed, Nov 12 - Wed, Nov 19

United Airlines flights from Portland, Maine to Denver

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

United Airlines

Nov 24

PWM5:30 amPortland

6h 54m

1 stop

DEN10:24 amDenver Intl

Nov 28

DEN10:05 amDenver Intl

3h 43m

PWM3:48 pmPortland

$292

Find similar

United Airlines

Nov 24

PWM3:20 pmPortland

5h 01m

DEN6:21 pmDenver Intl

Nov 28

DEN10:05 amDenver Intl

3h 43m

PWM3:48 pmPortland

$304

Find similar

United Airlines

Nov 22

PWM7:22 pmPortland

6h 53m

1 stop

DEN12:15 amDenver Intl

Nov 30

DEN11:50 pmDenver Intl

7h 29m

1 stop

PWM9:19 amPortland

$313

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Southwest flights from Portland, Maine to Denver

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

Southwest

Feb 11

PWM12:45 pmPortland

8h 35m

1 stop

DEN7:20 pmDenver Intl

Feb 17

DEN5:30 amDenver Intl

7h 45m

1 stop

PWM3:15 pmPortland

$301

Find similar

Southwest

Nov 12

PWM5:30 amPortland

11h 00m

2 stops

DEN2:30 pmDenver Intl

Nov 19

DEN7:00 amDenver Intl

5h 55m

1 stop

PWM2:55 pmPortland

$329

Find similar

Southwest

Jan 25

PWM5:35 amPortland

7h 55m

1 stop

DEN11:30 amDenver Intl

Feb 1

DEN5:30 amDenver Intl

7h 45m

1 stop

PWM3:15 pmPortland

$337

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandDenver

PWM - DEN

PWMDEN

Portland

Sat 12/6

6:18 pm-9:10 am

1 stop16h 52m

Denver Intl

Sun 12/14

12:11 pm-10:41 am

1 stop20h 30m

$287

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 11/19

6:00 am-2:04 pm

1 stop10h 04m

Denver Intl

Wed 12/3

6:15 am-4:07 pm

1 stop7h 52m

$289

PortlandDenver

PWM - DEN

PWMDEN

Portland

Mon 11/24

5:30 am-10:24 am

1 stop6h 54m

Denver Intl

Fri 11/28

10:05 am-3:48 pm

Nonstop3h 43m

$292

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 11/19

3:52 pm-11:18 pm

1 stop9h 26m

Denver Intl

Wed 12/3

10:21 am-11:37 pm

2 stops11h 16m

$294

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 11/19

12:26 pm-10:22 pm

2 stops11h 56m

Denver Intl

Wed 12/3

6:00 am-6:15 pm

2 stops10h 15m

$299

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 2/11

12:45 pm-7:20 pm

1 stop8h 35m

Denver Intl

Tue 2/17

5:30 am-3:15 pm

1 stop7h 45m

$301

PortlandDenver

PWM - DEN

PWMDEN

Portland

Mon 11/24

3:20 pm-6:21 pm

Nonstop5h 01m

Denver Intl

Fri 11/28

10:05 am-3:48 pm

Nonstop3h 43m

$304

PortlandDenver

PWM - DEN

PWMDEN

Portland

Sat 11/22

7:22 pm-12:15 am

1 stop6h 53m

Denver Intl

Sun 11/30

11:50 pm-9:19 am

1 stop7h 29m

$313

PortlandDenver

PWM - DEN

PWMDEN

Portland

Fri 11/14

3:20 pm-6:21 pm

Nonstop5h 01m

Denver Intl

Sat 11/22

11:50 pm-9:19 am

1 stop7h 29m

$314

PortlandDenver

PWM - DEN

PWMDEN

Portland

Wed 11/12

5:30 am-2:30 pm

2 stops11h 00m

Denver Intl

Wed 11/19

7:00 am-2:55 pm

1 stop5h 55m

$329

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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

Prices

Airlines

Layovers

Other information

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 $392.

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 $513. 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 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 $762.

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 $446 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 $371 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 October 2025, prices for Portland, Maine to Denver flights are approximately 58% 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	$198
Fastest flight time	5h 01m
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 $198. The best round-trip flight deal from Portland, Maine to Denver found on momondo in the last 72 hours is $374.

The fastest flight from Portland, Maine to Denver takes 5h 01m

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 01m.
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?
As of October 2025, there are 6 operators available to choose from 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?
momondo data reveals that the most frequently booked plane model on the route from Portland, Maine to Denver is Boeing 737-800, representing 81.51% of all bookings. The subsequent popular models are Airbus A319 at 7.53%, Boeing 737-700 at 2.05%, and Airbus A320-100/200 at 2.05%.
What is the most popular airline from Portland, Maine to Denver?
Based on momondo bookings for flights between Portland, Maine and Denver, the leading airline is United Airlines, making up 46% of the total bookings. Other popular airlines include American Airlines with 20%, Southwest with 16%, and Delta with 14%.

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
Frontier	PriceFrom $149	Free Cancellation	Rating 5.8 3,123 reviews	Search Frontier flights
JetBlue	PriceFrom $226	Free Cancellation	Rating 7.2 2,906 reviews	Search JetBlue flights
American Airlines	PriceFrom $254	Free Cancellation	Rating 7.2 11,030 reviews	Search American Airlines flights
Delta	PriceFrom $256	Free Cancellation	Rating 7.9 7,993 reviews	Search Delta flights
United Airlines	PriceFrom $294	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights
Southwest	PriceFrom $298	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest 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 $545, but momondo users have found United Airlines deals from Portland, Maine to Denver from as low as $294 round-trip. United Airlines has been scored 7.4/10 in 8,998 reviews.

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Black Hawk

Aurora

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Cripple Creek

Manitou Springs

Longmont

Boulder

Greeley

Lakewood

Thornton

Westminster

Winter Park

Copper Mountain

Silverthorne

Frisco

Centennial

Grand Lake

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.

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Cheap flights from Portland, Maine to Denver from $118

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 12/5. 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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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?

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 $513. 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 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 $762.

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?

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 October 2025, prices for Portland, Maine to Denver flights are approximately 58% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Portland to Denver Intl?

American Airlines, United Airlines, and Delta are the most popular carriers operating from Portland to Denver Intl

What airlines fly to Denver?

Which airport is the most popular layover for flights between Portland, Maine and Denver?

Washington, D.C. (IAD) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Portland, Maine to Denver?

Flights via Atlanta (ATL) offer the lowest average round-trip price of $272.

Which layover airport has the shortest travel time from Portland, Maine to Denver?

Flights connecting via Charlotte (CLT) have the shortest average one-way travel time: 6h 57m.

Which layover airport has the shortest connection time from Portland, Maine to Denver?

Atlanta (ATL) has the shortest average layover time for this route: 1h 09m.

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

1 flights are operational daily from Portland, Maine to Denver as of October 2025. The most popular departure time for this route is 3:00PM, with 87% of flights per day taking off in the afternoon.

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

As of October 2025, 10 flights take off from Portland, Maine and land in Denver each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.

When to book flights from Portland, Maine to Denver

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

Fastest flight time

Direct flights

Airports in Denver

How far is Portland to Denver Intl by plane?

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

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?

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

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

United Airlines Flights From Portland, Maine to Denver

Traveling to a place near Denver?

Why use momondo?

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

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

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

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

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.

Get notified when prices go down

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

Find better results for your trip to the United States

Airports servicing Colorado