Cheap flights from Portugal to District of Columbia from $366

In general, March is the cheapest month to fly from Portugal to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $666. If you don’t want to visit District of Columbia in March, then you should wait until February to fly from Portugal, when ticket prices are also cheap, with an average price of $676.

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 $858. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from Portugal because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,061.

Flying to District of Columbia from Portugal in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $713 when looking at flights departing in the afternoon. Flights to District of Columbia are more costly in the morning, with an average ticket price of $976. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to District of Columbia from Portugal when booking weeks ahead of your departure date. In general, you can expect to find flights to District of Columbia for around $796 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 Portugal for as low as $668 on momondo.

There are 3 cabin classes available to choose from on Portugal 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.

The number of flights available between Portugal and District of Columbia is 1 per day as of October 2026. The most frequent departure time is 12:00PM, with 73% of daily flights leaving in the afternoon.

As of October 2026, there are 12 flights per week flying from Portugal to District of Columbia. The most common day of the week flights depart is Mon, with 42% of flights taking off on this day.