Cheap flights from Portland, Maine to Denver from $127
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 12/14. 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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United Airlines flights from Portland, Maine to Denver
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Fly from
Fly to
Route
Depart
Return
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Wed 11/11
10:25 am-5:35 pm
1 stop9h 10m
Denver Intl
Thu 11/19
7:00 am-2:45 pm
1 stop5h 45m
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Mon 1/25
12:50 pm-7:30 pm
1 stop8h 40m
Denver Intl
Fri 1/29
11:15 am-9:40 pm
1 stop8h 25m
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Fri 11/6
5:50 am-12:12 pm
1 stop8h 22m
Denver Intl
Fri 11/13
10:11 am-4:02 pm
Nonstop3h 51m
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Fri 11/6
3:23 pm-6:14 pm
Nonstop4h 51m
Denver Intl
Mon 11/9
10:11 am-4:02 pm
Nonstop3h 51m
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Mon 11/16
9:48 am-8:22 am
2 stops48h 34m
Denver Intl
Tue 11/24
6:25 am-9:08 am
1 stop24h 43m
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Thu 10/29
7:00 am-1:59 pm
1 stop8h 59m
Denver Intl
Mon 11/2
2:59 pm-10:57 pm
1 stop5h 58m
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Wed 10/28
5:45 pm-12:36 am
1 stop8h 51m
Denver Intl
Sat 10/31
6:46 am-5:15 pm
1 stop8h 29m
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Thu 12/24
2:09 pm-9:01 pm
1 stop8h 52m
Denver Intl
Wed 12/30
7:15 am-3:50 pm
1 stop6h 35m
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Thu 3/18
4:50 pm-9:40 pm
1 stop6h 50m
Denver Intl
Tue 3/30
12:20 pm-11:49 pm
1 stop9h 29m
PortlandDenver
PWM Portland - DEN Denver Intl
PWMDEN
Portland
Fri 11/13
3:53 pm-8:13 am
2 stops42h 20m
Denver Intl
Tue 11/17
7:10 pm-9:08 am
1 stop11h 58m
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 typical price of a round-trip flight between Portland, Maine and Denver?
Prices are currently low for flights on this route.
Typical prices usually range from $379 to $538.The lowest price recently found on this route was $363.
What is the cheapest month to fly to Denver?
The cheapest month to fly to Denver from Portland, Maine is in February. Flight prices, which tend to average around $380, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in February, then you should wait until November to fly from Portland, Maine, when ticket prices are also cheap, with an average price of $383.
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 $514. 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 $925.
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 from Portland, Maine 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 $476 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 $419 on momondo.
What cabin class options are available on Portland, Maine to Denver flights?
There are 4 cabin classes available to choose from on Portland, Maine to Denver 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 2026, prices for Portland, Maine to Denver flights are approximately 39% more expensive when compared to flights at the same time last year.
What is the cheapest airline that flies from Portland to Denver Intl?
Southwest is the most popular carrier operating from Portland to Denver Intl
What airlines fly to Denver?
United Airlines, JetBlue and Southwest 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 45% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 6 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.
Which airport is the most popular layover for flights between Portland, Maine and Denver?
Washington, D.C. (IAD) was the most common stop: 50% 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 Washington, D.C. (IAD) offer the lowest average round-trip price of $381.
Which layover airport has the shortest travel time from Portland, Maine to Denver?
Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 7h 14m.
Which layover airport has the shortest connection time from Portland, Maine to Denver?
Washington, D.C. (IAD) has the shortest average layover time for this route: 1h 58m.
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
Frequently asked questions about flying from Portland, Maine to Denver
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 4h 51m.
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 2026, there are 5 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 MAX 8, representing 57.48% of all bookings. The subsequent popular models are Boeing 737-800 at 22.05%, Boeing 737 at 7.09%, and Airbus A320-100/200 at 2.36%.
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 58% of the total bookings. Other popular airlines include American Airlines with 21%, Southwest with 13%, and Delta with 5%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $164 | Free Cancellation | Rating 7.1 3,049 reviews | |||
| PriceFrom $269 | Free Cancellation | Rating 7.0 12,145 reviews | |||
| PriceFrom $294 | Free Cancellation | Rating 7.4 10,319 reviews | |||
| PriceFrom $300 | Free Cancellation | Rating 7.9 4,222 reviews | |||
| PriceFrom $306 | Free Cancellation | Rating 7.8 8,645 reviews |
United Airlines Flights From Portland, Maine to Denver
United Airlines operates around 6 flights from Portland, Maine to Denver every week. The average price of these flights found in the last 72 hours has been $496, 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 10,319 reviews.
Traveling to a place near Denver?
Book flights to Denver if you plan to visit one of these locationsWhy 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.