Cheap flights from Washington, D.C. to Lisbon from $342

In general, January is the cheapest month to fly from Washington, D.C. to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $680. If you are unable to visit Lisbon during the month of January, then departing from Washington, D.C. during the month February is also very affordable. Most momondo users find prices during this month for around $690.

Our data shows that Monday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $730. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to Lisbon for around $897.

The cheapest time of day to fly to Lisbon is in the afternoon when flights can be purchased for as low as $755. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $839 on average. Flights to Lisbon from Washington, D.C. in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Lisbon from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Lisbon for around $937 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Lisbon from Washington, D.C. for as low as $811 on momondo.

There are 3 cabin classes available to choose from on Washington, D.C. to Lisbon Humberto Delgado flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between Washington, D.C. to Lisbon.

As of April 2026, prices for Washington, D.C. to Lisbon flights are approximately 20% more expensive when compared to flights at the same time last year.

Royal Air Maroc, Icelandair, and Aer Lingus are the most popular carriers operating from Washington, D.C. to Lisbon Humberto Delgado

TAP AIR PORTUGAL, United Airlines and Royal Air Maroc are the top three most popular airlines that fly to Lisbon from Washington, D.C. according to our data. TAP AIR PORTUGAL is the first choice among our users, with 78% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 11 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

Historically, on average around 28% of flights between Washington, D.C. and Lisbon have experienced a delay on any given week. The average delay length over the past 12 months has been 145 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, TAP AIR PORTUGAL have had the least number of delays on this route over the last 12 months; with about 26% of their flights experiencing any sort of delay.

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

Flights via New York (JFK) offer the lowest average round-trip price of $454.

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 10h 29m.

London (LHR) has the shortest average layover time for this route: 2h 20m.

4 flights are operational daily from Washington, D.C. to Lisbon as of April 2026. The most popular departure time for this route is 10:00PM, with 88% of flights per day taking off in the evening.

As of April 2026, there are 33 flights per week flying from Washington, D.C. to Lisbon. The most common day of the week flights depart is Thu, with 24% of flights taking off on this day.