
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $677 (Kiwi.com) |
One-way from | $258 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $708 |
Good round-trip deal | $917 or less |
Good one-way deal | $495 or less |
Fly from
Fly to
Route
Depart
Return
Washington, D.C.London
IAD - STN
IADSTN
Washington, D.C. Dulles Intl
Fri 5/8
11:20 pm-12:50 am
2 stops20h 30m
London Stansted
Thu 5/14
6:00 am-8:35 pm
2 stops19h 35m
Washington, D.C.London
DCA - STN
DCASTN
Washington, D.C. Reagan-National
Mon 5/25
6:55 pm-11:20 pm
2 stops23h 25m
London Stansted
Mon 6/1
6:30 am-8:53 am
3 stops31h 23m
Washington, D.C.London
DCA - STN
DCASTN
Washington, D.C. Reagan-National
Mon 6/15
6:00 am-9:20 pm
3 stops34h 20m
London Stansted
Mon 6/22
10:00 pm-10:31 pm
3 stops29h 31m
Washington, D.C.London
DCA - STN
DCASTN
Washington, D.C. Reagan-National
Sun 5/31
6:00 am-10:20 pm
3 stops35h 20m
London Stansted
Fri 6/12
10:50 pm-10:28 pm
2 stops28h 38m
Washington, D.C.London
DCA - STN
DCASTN
Washington, D.C. Reagan-National
Mon 6/1
6:00 am-7:25 pm
3 stops32h 25m
London Stansted
Wed 6/10
10:00 pm-7:58 pm
3 stops26h 58m
BaltimoreLondon
BWI - LGW
BWILGW
Baltimore/Washington
Sat 5/9
8:30 pm-2:35 pm
1 stop13h 05m
London Gatwick
Thu 5/14
3:40 pm-10:15 pm
1 stop11h 35m
BaltimoreLondon
BWI - LHR
BWILHR
Baltimore/Washington
Sat 8/22
8:30 pm-11:55 am
1 stop10h 25m
London Heathrow
Mon 8/31
1:05 pm-7:25 pm
1 stop11h 20m
BaltimoreLondon
BWI - LGW
BWILGW
Baltimore/Washington
Sun 10/11
8:30 pm-2:40 pm
1 stop13h 10m
London Gatwick
Mon 10/26
2:40 pm-7:40 pm
1 stop33h 00m
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Sun 9/27
6:35 pm-6:55 am
Nonstop7h 20m
London Heathrow
Tue 10/6
6:50 am-2:20 pm
1 stop12h 30m
Washington, D.C.London
IAD - LGW
IADLGW
Washington, D.C. Dulles Intl
Sun 5/3
9:45 pm-4:00 pm
1 stop13h 15m
London Gatwick
Fri 5/15
10:25 am-7:35 pm
1 stop14h 10m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
The best time to book flights from Washington, D.C. to London is 52 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to London (average of $616). Flying from Washington, D.C. to London in December is currently the most expensive (average of $1,039). 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.
A simple way to save on the total cost of your ticket is to fly from Washington, D.C. to London in the morning. If you’re flexible enough to do this you can expect to save up to 50% on your trip compared to booking a flight at noon.
The most flights from WAS to LON are scheduled on a Monday (30 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (24 on average).
New York (JFK) – chosen by Cheapflights users on 49% of 1-stop itineraries from Washington, D.C. to London on Cheapflights.
Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $545.
Flights via Newark (EWR) have the shortest average one-way travel time for 1-stop routes: 9h 35m.
Flights via Zurich (ZRH) offer the fastest connection on this route, with an average layover time of 1h 23m.
About 20% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 167 minutes.
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Friday 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 15% of flights being delayed.
Comfort
Food
Overall
Crew
Boarding
Entertainment
Reviews
Anonymous,Apr 2026
DFW - EWR
Comfort
Food
Overall
Crew
Boarding
Entertainment
Reviews
Anonymous,Apr 2026
DFW - EWR
Comfort
Food
Overall
Crew
Boarding
Entertainment
Reviews
Anonymous,Apr 2026
DFW - EWR
Comfort
Food
Overall
Crew
Boarding
Entertainment
Reviews
Anonymous,Apr 2026
DFW - EWR
Comfort
Food
Overall
Crew
Boarding
Entertainment
Reviews
Anonymous,Apr 2026
DFW - EWR
Comfort
Food
Overall
Crew
Boarding
Entertainment
Reviews
Anonymous,Apr 2026
DFW - EWR
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$309 | Average$498 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$398 | Average$626 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$454 | Average$710 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$462 | Average$893 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$471 | Average$810 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$497 | Average$802 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$529 | Average$804 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$530 | Average$852 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$561 | Average$782 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$565 | Average$811 | FlexibilityNo cancel fee | On-time77% |