Cheap flights from Colorado to Portland from $136

The cheapest month to fly to Portland, Maine from Colorado is in January. Flight prices, which tend to average around $352, are often lower during this time because this is during the off-season. If you aren’t able to travel to Portland, Maine during the month of January, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $376.

On average, the least expensive day to fly to Portland, Maine from Colorado is on a Saturday. momondo users have found tickets for Saturday departures for as low as $560. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Colorado because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $684.

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

You are more likely to see cheaper flights to Portland, Maine from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland, Maine for around $501 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland, Maine from Colorado for as low as $360 on momondo.

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

You could potentially save up to 16% on your flight if you consider stops on a Colorado to Portland, Maine flight.

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

United Airlines, JetBlue and Southwest are the top three most popular airlines that fly to Portland, Maine from Colorado according to our data. United Airlines is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Portland, Maine. Keep in mind that there are 6 different airlines that fly to Portland, Maine on a routine basis, so you have a few additional options to choose from.

As of November 2026, 5 flights take off from Colorado and land in Portland, Maine each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.

The flight from Colorado to Portland, Maine depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Denver (a popular airport in Colorado) to Boston (the most popular airport in Portland, Maine), then the flight time is 3h 43m on average. If you fly from Aspen (another popular airport in Colorado) to Boston, then the average flight time is 6h 03m.