Cheap flights from District of Columbia to Lisbon from $423

In general, January is the cheapest month to fly from District of Columbia to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $683. If you are unable to visit Lisbon during the month of January, then departing from District of Columbia during the month February is also very affordable. Most momondo users find prices during this month for around $767.

Our data shows that Wednesday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $814. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from District of Columbia to Lisbon for around $950.

The cheapest time of day to fly to Lisbon is in the afternoon when flights can be purchased for as low as $852. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $885 on average. Flights to Lisbon from District of Columbia 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 District of Columbia - Lisbon Humberto Delgado flight prices

You are more likely to see cheaper flights to Lisbon from District of Columbia when booking weeks ahead of your departure date. In general, you can expect to find flights to Lisbon for around $1,011 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Lisbon from District of Columbia for as low as $917 on momondo.

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

Royal Air Maroc, Delta, and KLM are the most popular carriers operating from District of Columbia 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 District of Columbia according to our data. TAP AIR PORTUGAL is the first choice among our users, with 81% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 8 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

As of September 2026, 5 flights take off from District of Columbia and land in Lisbon each day. The most common flight departure time for this route is 10:00PM, with 84% of daily flights taking off in the evening.

As of September 2026, 39 flights take off from District of Columbia and land in Lisbon each week. The most common flight departure day for this route is Fri, with 21% of weekly flights taking off on this day.