Cheap flights from Denver to Portland from $137

The cheapest month to fly to Portland, Maine from Denver is in January. Flight prices, which tend to average around $363, 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 November is also cheap. Prices for this month can be found on momondo for an average of $374.

On average, the least expensive day to fly to Portland, Maine from Denver is on a Friday. momondo users have found tickets for Friday departures for as low as $530. 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 Denver because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $699.

In the afternoon is the cheapest time of day to fly from Denver to Portland, Maine when you can find flight prices for as low as $483. Flying to Portland, Maine in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $564. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You are more likely to see cheaper flights to Portland, Maine from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland, Maine for around $444 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland, Maine from Denver for as low as $376 on momondo.

You could potentially save up to 13% on your flight if you consider stops on a Denver to Portland, Maine flight.

As of May 2026, prices for Denver to Portland, Maine flights are approximately 22% more expensive when compared to flights at the same time last year.

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

United Airlines, JetBlue and Southwest are the top three most popular airlines that fly to Portland, Maine from Denver according to our data. United Airlines is the first choice among our users, with 47% 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.

Charlotte (CLT) was the most common stop: 30% of momondo users choosing 1-stop flights on this route connected there.

Flights via Atlanta (ATL) offer the lowest average round-trip price of $287.

Flights connecting via Baltimore (BWI) have the shortest average one-way travel time: 6h 07m.

Philadelphia (PHL) has the shortest average layover time for this route: 0h 57m.