
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $610 (Expedia) |
One-way from | $340 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $793 |
Good round-trip deal | $734 or less |
Good one-way deal | $712 or less |
Fly from
Fly to
Route
Depart
Return
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
fre 7/3
4:40 pm-8:00 pm
Nonstop8h 20m
Washington, D.C. Dulles Intl
mån 7/6
6:30 pm-6:55 am
Nonstop7h 25m
LondonWashington, D.C.
LHR - DCA
LHRDCA
London Heathrow
tors 7/2
7:45 am-2:23 pm
1 stop11h 38m
Washington, D.C. Reagan-National
ons 7/8
10:07 am-5:55 am
1 stop14h 48m
LondonWashington, D.C.
LHR - DCA
LHRDCA
London Heathrow
ons 7/1
9:30 am-3:38 pm
1 stop11h 08m
Washington, D.C. Reagan-National
tis 7/7
6:00 am-8:40 pm
1 stop9h 40m
LondonWashington, D.C.
LHR - DCA
LHRDCA
London Heathrow
ons 7/1
9:30 am-3:38 pm
1 stop11h 08m
Washington, D.C. Reagan-National
mån 7/6
3:10 pm-5:55 am
1 stop9h 45m
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
ons 7/29
8:05 pm-4:45 pm
1 stop25h 40m
Washington, D.C. Dulles Intl
mån 8/24
8:20 pm-5:50 pm
1 stop16h 30m
LondonWashington, D.C.
LGW - IAD
LGWIAD
London Gatwick
lör 7/4
11:30 am-6:55 pm
1 stop12h 25m
Washington, D.C. Dulles Intl
mån 8/10
5:00 pm-10:50 am
1 stop12h 50m
LondonWashington, D.C.
LGW - IAD
LGWIAD
London Gatwick
ons 7/8
8:40 pm-6:55 pm
1 stop27h 15m
Washington, D.C. Dulles Intl
mån 8/10
10:27 am-10:50 am
2 stops19h 23m
LondonWashington, D.C.
LGW - IAD
LGWIAD
London Gatwick
ons 7/8
8:40 pm-6:55 pm
1 stop27h 15m
Washington, D.C. Dulles Intl
tors 8/6
8:40 pm-9:10 am
2 stops31h 30m
LondonBaltimore
LHR - BWI
LHRBWI
London Heathrow
tors 10/29
3:25 pm-7:45 pm
Nonstop8h 20m
Baltimore/Washington
tors 11/5
8:35 pm-8:40 am
Nonstop7h 05m
LondonWashington, D.C.
LTN - IAD
LTNIAD
London Luton
fre 7/10
6:20 am-7:20 pm
2 stops18h 00m
Washington, D.C. Dulles Intl
mån 7/13
8:30 pm-10:50 pm
2 stops21h 20m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 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 $597). Flying from London to Washington, D.C. in December is currently the most expensive (average of $841). 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 Wednesday (28 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (23 on average).
Dublin (DUB) – chosen by Cheapflights users on 40% 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 133 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 12% 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.
Food
Overall
Crew
Comfort
Entertainment
Boarding
Reviews
Rakshith,May 2026
TPE - SEA
Food
Overall
Crew
Comfort
Entertainment
Boarding
Reviews
Rakshith,May 2026
TPE - SEA
Food
Overall
Crew
Comfort
Entertainment
Boarding
Reviews
Rakshith,May 2026
TPE - SEA
Food
Overall
Crew
Comfort
Entertainment
Boarding
Reviews
Rakshith,May 2026
TPE - SEA
Food
Overall
Crew
Comfort
Entertainment
Boarding
Reviews
Rakshith,May 2026
TPE - SEA
Food
Overall
Crew
Comfort
Entertainment
Boarding
Reviews
Rakshith,May 2026
TPE - SEA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$320 | Average$968 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$466 | Average$711 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$523 | Average$742 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$534 | Average$719 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$559 | Average$796 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$567 | Average$772 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$571 | Average$770 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$635 | Average$663 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$658 | Average$786 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$670 | Average$803 | FlexibilityNo cancel fee | On-time72% |