Cheap flights from Lisbon to Washington, D.C. from $382

The month of December is, on average, the cheapest month to fly to Washington, D.C. from Lisbon, with most prices found around $639. If you’re not able to fly to Washington, D.C. in December, then March is your next best option. Flight prices from Lisbon to Washington, D.C. during March average around $672.

On average, the least expensive day to fly to Washington, D.C. from Lisbon is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $898. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Lisbon to Washington, D.C. for around $1,111.

In the afternoon is the cheapest time of day to fly from Lisbon to Washington, D.C. when you can find flight prices for as low as $705. Flying to Washington, D.C. 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 $972. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

You could potentially save up to 62% on your flight if you consider stops on a Lisbon to Washington, D.C. flight.

Historically, on average around 30% of flights between Lisbon and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 131 minutes.

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

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

According to our data, United Airlines 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.

The number of flights available between Lisbon and Washington, D.C. is 6 per day as of August 2026. The most frequent departure time is 12:00PM, with 71% of daily flights leaving in the afternoon.

As of August 2026, 42 flights take off from Lisbon and land in Washington, D.C. each week. The most common flight departure day for this route is Wed, with 17% of weekly flights taking off on this day.