
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $584 (Kiwi.com) |
One-way from | $437 (Priceline) |
Popular in | June |
Cheapest in | February |
Average price | $769 |
Good round-trip deal | $737 or less |
Good one-way deal | $489 or less |
Fly from
Fly to
Route
Depart
Return
LondonWashington, D.C.
LGW - IAD
LGWIAD
London Gatwick
Fri 11/20
11:55 am-6:30 pm
1 stop11h 35m
Washington, D.C. Dulles Intl
Sat 2/13
7:40 pm-10:55 am
1 stop10h 15m
LondonWashington, D.C.
LGW - IAD
LGWIAD
London Gatwick
Wed 11/18
11:55 am-6:30 pm
1 stop11h 35m
Washington, D.C. Dulles Intl
Mon 2/15
7:40 pm-10:55 am
1 stop10h 15m
LondonWashington, D.C.
LTN - IAD
LTNIAD
London Luton
Fri 8/28
6:20 am-8:24 pm
2 stops19h 04m
Washington, D.C. Dulles Intl
Tue 9/1
8:30 pm-3:30 pm
2 stops14h 00m
LondonWashington, D.C.
LHR - DCA
LHRDCA
London Heathrow
Sat 10/24
6:15 am-4:37 pm
2 stops15h 22m
Washington, D.C. Reagan-National
Thu 10/29
11:00 am-6:55 am
1 stop15h 55m
LondonWashington, D.C.
LHR - DCA
LHRDCA
London Heathrow
Wed 12/2
9:20 am-4:00 pm
1 stop11h 40m
Washington, D.C. Reagan-National
Mon 12/7
3:40 pm-6:55 am
1 stop10h 15m
LondonWashington, D.C.
LGW - DCA
LGWDCA
London Gatwick
Sat 10/24
10:25 am-11:09 pm
2 stops17h 44m
Washington, D.C. Reagan-National
Thu 10/29
11:55 am-3:45 pm
2 stops23h 50m
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Thu 8/27
8:45 am-4:45 pm
1 stop13h 00m
Washington, D.C. Dulles Intl
Mon 8/31
12:35 pm-10:25 am
1 stop16h 50m
LondonWashington, D.C.
LCY - IAD
LCYIAD
London City
Tue 8/25
9:20 am-3:35 pm
1 stop11h 15m
Washington, D.C. Dulles Intl
Mon 8/31
6:10 pm-9:30 am
1 stop10h 20m
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Wed 8/12
8:40 am-4:45 pm
1 stop13h 05m
Washington, D.C. Dulles Intl
Sun 9/6
6:30 pm-6:55 am
Nonstop7h 25m
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Fri 8/28
5:05 pm-8:20 pm
Nonstop8h 15m
Washington, D.C. Dulles Intl
Fri 9/4
7:15 pm-7:45 am
Nonstop7h 30m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
Currently, September is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $596). Flying from London to Washington, D.C. in May is currently the most expensive (average of $836). 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.
When flying from London to Washington, D.C., the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
The most flights from LON to WAS are scheduled on a Monday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (25 on average).
Dublin (DUB) – chosen by Cheapflights users on 36% of 1-stop itineraries from London to Washington, D.C. on Cheapflights.
Lisbon (LIS) is the most affordable 1-stop option, with an average round-trip price of $509.
Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 11h 05m.
Flights via Lisbon (LIS) offer the fastest connection on this route, with an average layover time of 1h 23m.
About 18% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 136 minutes.
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.
Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Over the last year, United Airlines have had the lowest number of delays on this route, with just 11% of flights being delayed.
To ensure you get the cheapest price possible for a flight from London to Washington, D.C., you should look to book at least 81 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Overall
Food
Comfort
Boarding
Entertainment
Crew
Reviews
Rakshith,May 2026
TPE - SEA
Overall
Food
Comfort
Boarding
Entertainment
Crew
Reviews
Rakshith,May 2026
TPE - SEA
Overall
Food
Comfort
Boarding
Entertainment
Crew
Reviews
Rakshith,May 2026
TPE - SEA
Overall
Food
Comfort
Boarding
Entertainment
Crew
Reviews
Rakshith,May 2026
TPE - SEA
Overall
Food
Comfort
Boarding
Entertainment
Crew
Reviews
Rakshith,May 2026
TPE - SEA
Overall
Food
Comfort
Boarding
Entertainment
Crew
Reviews
Rakshith,May 2026
TPE - SEA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$320 | Average$893 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$466 | Average$711 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$534 | Average$743 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$536 | Average$740 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$559 | Average$796 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$567 | Average$772 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$571 | Average$754 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$635 | Average$663 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$658 | Average$783 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$670 | Average$797 | FlexibilityNo cancel fee | On-time72% |