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Cheap flights from Washington, D.C. to Lisbon

Washington
WAS
Lisbon
LIS

Flight deals from Washington, D.C. to Lisbon

Below you can see the best deals on flights Washington, D.C. — Lisbon for upcoming dates. Direct and connecting flights from various airlines — compare prices and choose the right ticket.

The lowest price for the next 2 months is on 24 August, from $332.

Top 10 cheap flights from Washington, D.C. to Lisbon

FI
$ 360

Washington, D.C. — Reykjavik

20:3006:25
18 Aug 2026
5 h 55 m
Direct flight
B6
$ 407

Washington, D.C. — Boston

14:2516:01
18 Aug 2026
1 h 36 m
Direct flight
B6
$ 407

Washington, D.C. — Boston

13:2515:00
18 Aug 2026
1 h 35 m
Direct flight
B6
$ 407

Washington, D.C. — Boston

11:0012:35
18 Aug 2026
1 h 35 m
Direct flight
B6
$ 407

Washington, D.C. — Boston

14:2516:01
18 Aug 2026
1 h 36 m
Direct flight
B6
$ 407

Washington, D.C. — Boston

13:2515:00
18 Aug 2026
1 h 35 m
Direct flight
B6
$ 407

Washington, D.C. — Boston

11:0012:35
18 Aug 2026
1 h 35 m
Direct flight
B6
$ 407

Washington, D.C. — Boston

17:5919:41
18 Aug 2026
1 h 42 m
Direct flight
B6
$ 407

Washington, D.C. — Boston

17:0018:41
18 Aug 2026
1 h 41 m
Direct flight
B6
$ 407

Washington, D.C. — Boston

08:4910:25
18 Aug 2026
1 h 36 m
Direct flight

Prices were found in the last 72 hours and may change — check the exact price when you continue.

About the Washington, D.C. — Lisbon flight

Flight ticket prices by day: Washington, D.C. — Lisbon

Below is a calendar of the lowest flight ticket prices for Washington, D.C. — Lisbon by day. Pick a convenient date and instantly see the fare. The cheapest flights on this route start from $314 in b, and the most expensive are around $492 in n. If your travel dates are flexible, the calendar will help you find the best price for your preferred period. To view round-trip fares, switch to the "Round trip" tab above the calendar, select your departure date — and the right-hand calendar will highlight the lowest prices for return flights on each day.

 
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When to fly

The climate in Lisbon is most favorable in August, when temperatures reach 25.9°C and rainfall is at a minimum. According to statistics, the wettest month is March, bringing about 68.56 mm of rain, while the coolest month is January, with an average low of 9.5°C.

In terms of budget, it is most cost-effective to plan your flight for July, when ticket prices start $294. The most expensive period to travel is March — during this month, the ticket price increases and starts $493.

The best choice for a balance of weather and flight cost is May or September. During these periods, Portugal enjoys comfortable temperatures and moderate flight prices, while the peak rainy periods in November are best avoided.

Temperature · Lisbon

Dry and wet days · Lisbon

Wind speed and direction · Lisbon

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How to get the best deal on a Washington, D.C. — Lisbon ticket

  • Consider direct flights from TAP Air Portugal and United Airlines, as they provide the most consistent connection between the cities.
  • Use the low-fare calendar on this page to find tickets $294, available during periods of low demand.
  • Try to book tickets at least 8–10 weeks before departure, especially if your trip is planned for the summer season or holidays.
  • Check the baggage allowance for your chosen fare: on transatlantic routes, booking a ticket with a checked bag included is often cheaper than paying for excess weight at check-in.
  • Monitor the price dynamics chart to catch seasonal price drops and avoid overpaying during peak months.

Airlines

Two main airlines operate on this route: United Airlines and TAP Air Portugal, providing a total of about 14 departures per week. Most often, passengers choose direct flights from the Portuguese national carrier or convenient connecting options from the American airline. To explore the detailed daily schedule and choose the right option, check out the interactive list below.

  • TAP PortugalTP
    9x/week
    WebsiteFleet: 9415.9M pax/year
    • Direct flight IAD → LIS9x/week
      Duration
      7h 23m
      Days
      MTWTFSS
  • United AirlinesUA
    5x/week
    WebsiteFleet: 956165M pax/year
    • Direct flight IAD → LIS5x/week
      Duration
      7h 5m
      Days
      MTWTFSS

Cities and airports on the Washington, D.C. — Lisbon route

Flights Washington, D.C. — Lisbon depart from Washington Dulles International Airport, Baltimore/Washington International Thurgood Marshall Airport and Ronald Reagan National Airport and arrive at Lisbon Portela Airport. Below are pages for the cities, countries, and airports on the route: airlines, schedules, and travel guides.

Departure airports
Arrival airports

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Frequently asked questions about the Washington, D.C. — Lisbon flight

How long is the flight from Washington to Lisbon?

A direct flight covers a distance of 5,750 km and takes an average of about 7 hours, depending on the aircraft type and weather conditions.

Which airlines fly this route?

Regular air service between the cities is provided by United Airlines and TAP Air Portugal.

Are there direct flights from Washington, D.C. to Lisbon?

Yes, direct flights are available on this route, which is the most convenient and fastest way to reach Portugal from the US capital.

Which airport does the flight arrive at in Lisbon?

International flights from Washington arrive at Portugal's main airport — Lisbon (LIS), which is located within the city and has excellent transport links.

When is the best time to buy tickets to save money?

Flight prices are constantly changing. It is recommended to follow current offers in the low-fare calendar on our page and book in advance.

Where else you can fly from Washington, D.C.

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Where else you can fly from Lisbon

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