Cheap flights from Washington, D.C. Dulles Intl Airport to Lisbon
The best prices from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado are usually found in February or November, booked 26 days in advance, depart on a Thursday or Tuesday and return on a Wednesday
Cheap flight deals from Dulles Intl to Lisbon
Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 20 February 2025.
Popular in | June |
|---|---|
Cheapest in | February |
Average price | £542 |
Good round-trip deal | £2,128 or less |
Best time to book a flight from Dulles Intl to Lisbon
Have a flexible travel schedule? Discover the best time to fly to Lisbon from Dulles Intl with our price prediction graph.
Travel insights for flights from Dulles Intl to Lisbon
Get recent, data-driven insights about flights from Dulles Intl to Lisbon including ideal travel times, pricing trends, and more.
How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Lisbon?
Use this chart to determine the optimal time to book a return flight from Dulles Intl to Lisbon. Price data was last updated on 14 February 2025.
The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Lisbon may vary depending on when you book. For the best chance of a lower fare, look to book 26 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Lisbon?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Lisbon (average of £101). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in August is currently the most expensive (average of £274). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from IAD to LIS?
Find hourly flight availability from Dulles Intl to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 February 2025.
A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Dulles Intl Airport to Lisbon at midday. If you’re flexible enough to do this you can expect to save up to 10% on your trip compared to booking a flight in the morning.
Rainfall in Lisbon by month
Plan your trip to Lisbon by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Lisbon ranges from 6.0 - 122.0 inches per month. December is typically the wettest month, when rainfall can reach 122.0 mm. July is typically the driest time to visit Lisbon when rainfall is around 6.0 mm.
Temperature in Lisbon by month
Plan your trip to Lisbon by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Lisbon, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).
Related info for your journey
Find useful and relevant information for your journey from Dulles Intl to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Washington, D.C. Dulles Intl Airport?
Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locationsBrowse thousands of different options on Cheapflights for your next trip
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Complete your trip
Complete your trip to Lisbon by adding a car hire and/or hotel booking to your travel itinerary.
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When you search for this flight from Dulles Intl to Lisbon, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
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Yes, Cheapflights offers price alerts on Dulles Intl to Lisbon flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.