Cheap flights from District of Columbia to Portugal from $235

The cheapest month to fly to Portugal from District of Columbia is in January. Flight prices, which tend to average around $681, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from District of Columbia during February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $744.

According to our data, Monday is the cheapest day to fly to Portugal from District of Columbia. The lowest ticket price found for a Monday departure recently was $786. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Friday, with ticket prices averaging around $925.

Our most recent data shows that the best time of day to fly to Portugal is in the afternoon. Flights from District of Columbia to Portugal during this time can be as low as $814. In the evening is when there is more demand to fly to Portugal, so prices are often more expensive at around $880 per ticket.

Fly from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado for the best District of Columbia - Portugal flight prices

You are more likely to see cheaper flights to Portugal from District of Columbia when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $990 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from District of Columbia for as low as $824 on momondo.

There are 3 cabin classes available to choose from on District of Columbia to Portugal flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

KLM, Delta, and United Airlines are the most popular carriers operating from District of Columbia to Portugal

TAP AIR PORTUGAL, United Airlines and Lufthansa are the top three most popular airlines that fly to Portugal from District of Columbia according to our data. TAP AIR PORTUGAL is the first choice among our users, with 82% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 12 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

As of July 2026, there are 5 flights per day flying from District of Columbia to Portugal. The most common time of day flights depart is 10:00PM, with 84% of flights taking off in the evening.

As of July 2026, there are 39 flights per week flying from District of Columbia to Portugal. The most common day of the week flights depart is Fri, with 21% of flights taking off on this day.