$500 Find Cheap Flights from London to Washington Dulles Airport - Compare and Save

These are the earliest and latest flight times available from London to Washington, D.C. Dulles Intl Airport:

• Earliest: departs at 12:05 pm and lands at 8:42 pm
• Latest: departs at 4:25 pm and lands at 1:02 am.

The flight takes about 8h 37m.

Four cabin classes are available on flights from London to Washington, D.C. Dulles Intl Airport:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

A nonstop flight from London to Washington, D.C. Dulles Intl Airport takes 8h 37m, covering 3,677 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Round-trip flights from London to Washington, D.C. Dulles Intl Airport range from $628 to $854, with an average of $735 over the past 12 months. Anything below $628 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 16% above the $735 route average. Book 22 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $492 round-trip via Chicago O'Hare Intl (ORD), compared to $746 for nonstop.

United Airlines is slightly above the route average for timely arrivals, while Virgin Atlantic has a lower on-time arrival rate. On-time arrival rates on London to Washington, D.C. Dulles Intl Airport flights are:

• United Airlines: 90% on time
• Virgin Atlantic: 82% on time
• British Airways: 79% on time

Overall, flights on this route are punctual 84% of the time on average.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

Afternoon is the busiest departure period on London to Washington, D.C. Dulles Intl Airport flights, with 100% of flights leaving in that window. Morning departures account for 0%, evening flights for 0%, and night flights for 0%.

Two airlines offer in-flight Wi-Fi on London to Washington, D.C. Dulles Intl Airport flights:

• Virgin Atlantic
• Delta

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

One-way fares from London to Washington, D.C. Dulles Intl Airport are currently lower than usual. Average one-way flight prices are about $551, which is 26% below the typical average for this route.

Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates averaging $70 for economy cars. Top options include:

• Dollar
• Hertz
• Budget
• Sixt
• Thrifty

Flights from London to Washington, D.C. Dulles Intl Airport may depart from several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN). Flights usually arrive at Washington, D.C. Dulles Intl (IAD).

Afternoon flights have the fewest delays on this route.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the London to Washington, D.C. Dulles Intl Airport route, 16% of flights were delayed in the past 3 months, with delays averaging 2h 15m.

One-stop flights from London to Washington, D.C. Dulles Intl Airport most commonly connect through:

• Reykjavik Keflavik Intl (KEF) - 39% of one-stop connections
• Dublin (DUB) - 36% of one-stop connections
• Lisbon Humberto Delgado (LIS) - 6% of one-stop connections
• Zurich (ZRH) - 4% of one-stop connections

Yes. Flexible dates can save you up to 8% on flights from London to Washington, D.C. Dulles Intl Airport. Thursday is the cheapest departure day at $717 round-trip on average, while Sunday is the most expensive at $779, a difference of $62.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

3 airlines operate flights between London and Washington, D.C. Dulles Intl Airport. The airlines offering nonstop flights on this route include:

• United Airlines
• British Airways
• Virgin Atlantic

Flying via Newark (EWR) gives the shortest average 1-stop total travel time at 10h 41m, compared with 10h 58m via Dublin (DUB) and 11h 03m via New York John F Kennedy Intl (JFK).

Washington, D.C. Dulles Intl Airport is 4 hours behind London (Eastern Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

Among airlines operating London to Washington, D.C. Dulles Intl Airport flights:

• Virgin Atlantic: offers extra legroom; offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection
• Delta: offers extra legroom; offers free seat selection
• Iberia: offers free seat selection
• KLM: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• British Airways: a cabin bag and a checked bag in Economy Class
• Lufthansa: a cabin bag and a checked bag in Economy Class
• Virgin Atlantic: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.