Cheap flights from Portland, Maine to District of Columbia from $121

In general, September is the cheapest month to fly from Portland, Maine to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $237. If you don’t want to visit District of Columbia in September, then you should wait until October to fly from Portland, Maine, when ticket prices are also cheap, with an average price of $252.

The cheapest day to depart on your flight to District of Columbia is on a Friday when prices can be found for as low as $353. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Portland, Maine because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $493.

Flying to District of Columbia from Portland, Maine in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $366 when looking at flights departing in the afternoon. Flights to District of Columbia are more costly at noon, with an average ticket price of $449. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Portland to Baltimore/Washington for the best Portland - District of Columbia flight prices

You are more likely to see cheaper flights to District of Columbia from Portland, Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to District of Columbia for around $327 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to District of Columbia from Portland, Maine for as low as $189 on momondo.

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

United Airlines and Delta are the most popular carriers operating from Portland to District of Columbia

American Airlines, JetBlue and United Airlines are the top three most popular airlines that fly to District of Columbia from Portland, Maine according to our data. American Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to District of Columbia. Keep in mind that there are 6 different airlines that fly to District of Columbia on a routine basis, so you have a few additional options to choose from.

As of March 2026, there are 3 flights per day flying from Portland, Maine to District of Columbia. The most common time of day flights depart is 9:00AM, with 62% of flights taking off at noon.

26 flights are operational weekly from Portland, Maine to District of Columbia as of March 2026. The most popular departure day for this route is Mon, with 31% of flights per week taking off on this day.