Cheap flights from Colorado to Portland from $137

The cheapest month to fly to Portland, Maine from Colorado is in July. Flight prices, which tend to average around $158, 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 July, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $159.

On average, the least expensive day to fly to Portland, Maine from Colorado 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 Colorado 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 Colorado 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 $566. 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 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 $450 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 $349 on momondo.

Southwest, United Airlines, and Delta 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 51% 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 May 2026, there are 1 flights per day flying from Colorado to Portland, Maine. The most common time of day flights depart is 9:00AM, with 100% of flights taking off at noon.

As of May 2026, 7 flights take off from Colorado and land in Portland, Maine each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.