
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $602 |
One-way from | $336 (Norse) |
Popular in | July |
Cheapest in | February |
Average price | $692 |
Good round-trip deal | $692 or less |
Good one-way deal | $742 or less |
Fly from
Fly to
Route
Depart
Return
LondonWashington, D.C.
LGW - IAD
LGWIAD
London Gatwick
Mon 8/31
3:40 pm-7:20 pm
1 stop32h 40m
Washington, D.C. Dulles Intl
Fri 9/11
11:20 pm-11:45 am
1 stop31h 25m
LondonBaltimore
LHR - BWI
LHRBWI
London Heathrow
Wed 9/9
1:50 pm-5:29 pm
2 stops32h 39m
Baltimore/Washington
Mon 9/21
6:15 am-7:15 am
2 stops20h 00m
LondonWashington, D.C.
LGW - IAD
LGWIAD
London Gatwick
Thu 5/28
1:00 pm-7:20 pm
1 stop11h 20m
Washington, D.C. Dulles Intl
Tue 7/28
8:30 pm-2:40 pm
1 stop13h 10m
LondonWashington, D.C.
LTN - IAD
LTNIAD
London Luton
Fri 6/5
6:20 am-3:45 pm
1 stop14h 25m
Washington, D.C. Dulles Intl
Mon 6/8
5:15 pm-9:15 am
1 stop11h 00m
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Thu 10/29
7:50 am-4:35 pm
1 stop12h 45m
Washington, D.C. Dulles Intl
Thu 11/5
6:20 pm-6:30 am
Nonstop7h 10m
LondonBaltimore
LHR - BWI
LHRBWI
London Heathrow
Mon 8/24
9:15 am-5:45 pm
1 stop13h 30m
Baltimore/Washington
Wed 9/2
4:25 pm-9:05 am
1 stop11h 40m
LondonBaltimore
LHR - BWI
LHRBWI
London Heathrow
Tue 10/13
4:25 pm-7:40 pm
Nonstop8h 15m
Baltimore/Washington
Mon 10/19
9:30 pm-9:50 am
Nonstop7h 20m
LondonWashington, D.C.
LTN - IAD
LTNIAD
London Luton
Mon 6/8
8:15 am-3:45 pm
1 stop12h 30m
Washington, D.C. Dulles Intl
Mon 6/15
9:00 pm-12:45 pm
1 stop10h 45m
LondonWashington, D.C.
LGW - DCA
LGWDCA
London Gatwick
Mon 6/15
12:20 pm-9:54 pm
1 stop14h 34m
Washington, D.C. Reagan-National
Mon 6/29
2:20 pm-9:35 am
1 stop14h 15m
LondonBaltimore
LGW - BWI
LGWBWI
London Gatwick
Thu 6/11
3:40 pm-10:15 pm
1 stop11h 35m
Baltimore/Washington
Thu 7/30
11:20 pm-2:40 pm
1 stop10h 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 |
To ensure you get the cheapest price possible for a flight from London to Washington, D.C., you should look to book at least 68 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.
Currently, March is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $642). Flying from London to Washington, D.C. in December is currently the most expensive (average of $843). 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 Friday, which is when the least amount of flights are scheduled (26 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 127 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, Virgin Atlantic have had the lowest number of delays on this route, with just 11% of flights being delayed.
Boarding
Food
Overall
Crew
Entertainment
Comfort
Reviews
Anonymous,May 2026
SEA - KOA
Boarding
Food
Overall
Crew
Entertainment
Comfort
Reviews
Anonymous,May 2026
SEA - KOA
Boarding
Food
Overall
Crew
Entertainment
Comfort
Reviews
Anonymous,May 2026
SEA - KOA
Boarding
Food
Overall
Crew
Entertainment
Comfort
Reviews
Anonymous,May 2026
SEA - KOA
Boarding
Food
Overall
Crew
Entertainment
Comfort
Reviews
Anonymous,May 2026
SEA - KOA
Boarding
Food
Overall
Crew
Entertainment
Comfort
Reviews
Anonymous,May 2026
SEA - KOA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$320 | Average$907 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$466 | Average$664 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$473 | Average$730 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$534 | Average$743 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$536 | Average$772 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$559 | Average$796 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$567 | Average$808 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$571 | Average$818 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$635 | Average$663 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$658 | Average$786 | FlexibilityNo cancel fee | On-timeN/A |