Cheap Flights from Washington Dulles (IAD) to London Heathrow (LHR)

Top tips for finding a cheap flight from Washington to London

Finding cheap tickets from Washington to London is easy with a little flexibility. Use our Whole Month search feature to scan through the calendar for the cheapest dates. You can also set up a Price Alert for your route and let us monitor the fares for you, sending notifications when prices change. If you’d rather skip layovers, select the Direct Flights search to view non-stop options that’ll save you time.

Booking your tickets early often leads to savings, but we can also find you some last-minute deals. In general, January is the best time to schedule your trip from Washington to London, with the lowest average fares across the board. Keep these strategies in mind to find the best itinerary.

Handy information about Washington airport

Washington Dulles International Airport serves as a primary gateway for both domestic and international flights in the Washington, D.C. area. Equipped with four terminals, the airport is designed to cater to the needs of its travelers efficiently. Terminal 1, also known as Concourse A, focuses on international flights and provides 33 gates, complete with customs and immigration facilities for passengers arriving from abroad. Meanwhile, Terminal 2, or Concourse B, handles a mix of international carriers, some of which are low-cost, operating from gates B35 to B79, and similarly offers customs services.

For passengers flying within the United States, Terminal 3 and Terminal 4, Concourse C and D respectively, provide a comprehensive range of domestic flight options. Terminal 3 also accommodates a few international flights, offering customs and immigration processing at gates C2 through to C28. Terminal 4 with gates D1 to D32 maintains a focus on domestic routes. Passengers should check with their respective airlines for detailed information regarding flight operations as each terminal hosts different carriers with varying itineraries.

London airport: good to know

London serves as a true global gateway with six airports managing a spectrum of international and domestic flights. The centrally located London City Airport, notable for its single terminal, primarily focuses on domestic and European flights tailored for business travelers, while also offering a few transatlantic routes. It presents various transport options including the Docklands Light Railway, enhancing its accessibility.

Heathrow, the UK's largest airport, operates from four terminals offering comprehensive international connections. You'll find a multitude of transportation channels like the Heathrow Express and the Piccadilly Underground line that provide direct access to and from the heart of the city. Similarly, Gatwick, with two terminals, and Stansted, with one, both offer a range of flights, including low-cost options, and direct train routes into London. Luton, also facilitating primarily budget carriers from its single terminal, connects travelers to London via its nearby train station. Lastly, Southend Airport completes the set with links into the city, chiefly serving domestic and European airlines. For a stress-free start to your trip when flying from Washington to London, find out what the airports have to offer before you arrive.

Best time to fly from Washington to London

The best time to fly from Washington to London is during the months of July and August when the weather is at its most pleasant, with average temperatures ranging from a comfortable 59°F to 77°F. Although occasional heatwaves can push temperatures slightly higher, these summer months offer long daylight hours and the warmest climate, creating an ideal setting for sightseeing and exploring all that London has to offer. Remember that while London's weather is generally mild, rainfall is common year-round, so an umbrella should be a staple in your travel gear.

Reasons to visit London

When planning your trip to London, check out these activities and attractions the city has to offer. Marvel at historic artifacts from around the globe at The British Museum, one of the world's oldest museums. Discover the Tower of London to see the Crown Jewels and learn about the city's rich history. Enjoy a remarkable view of the capital's skyline from the capsules of The London Eye. Don't miss the Notting Hill Carnival, a street festival celebrating Caribbean culture with music, dance, and a parade. This event is a highlight of the year and a true spectacle to witness.

Add hotel bookings and car hire to your Washington to London flight

Planning your trip to London is easy and convenient with Skyscanner. Choose from reputable car rental brands, including Green Motion, Europcar, and Hertz, to explore the city at your own pace. For your stay, consider the Park Plaza Westminster Bridge London for proximity to major landmarks, or opt for the Sofitel London Heathrow for a luxury experience near the airport. For budget-friendly options, Premier Inn London Heathrow Airport T2 & T3 – Bath Road offers comfort minutes away from your flight.