
Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $687 (Kiwi.com) |
One-way from | $317 (ITA Airways) |
Popular in | June |
Cheapest in | February |
Average price | $877 |
Good round-trip deal | $953 or less |
Good one-way deal | $448 or less |
Fly from
Fly to
Route
Depart
Return
Washington, D.C.London
IAD Washington, D.C. Dulles Intl - LGW London Gatwick
IADLGW
Washington, D.C. Dulles Intl
Sun 11/15
7:40 pm-10:55 am
1 stop10h 15m
London Gatwick
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
Washington, D.C.London
IAD Washington, D.C. Dulles Intl - LHR London Heathrow
IADLHR
Washington, D.C. Dulles Intl
Sat 1/9
7:40 pm-7:30 pm
1 stop18h 50m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
Washington, D.C.London
IAD Washington, D.C. Dulles Intl - LGW London Gatwick
IADLGW
Washington, D.C. Dulles Intl
Wed 11/25
9:35 pm-6:50 am
1 stop28h 15m
London Gatwick
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
Washington, D.C.London
IAD Washington, D.C. Dulles Intl - LGW London Gatwick
IADLGW
Washington, D.C. Dulles Intl
Tue 2/9
7:17 am-9:00 am
2 stops20h 43m
London Gatwick
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
Washington, D.C.London
IAD Washington, D.C. Dulles Intl - LCY London City
IADLCY
Washington, D.C. Dulles Intl
Tue 12/29
4:30 pm-6:50 pm
2 stops21h 20m
London City
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
Washington, D.C.London
IAD Washington, D.C. Dulles Intl - LTN London Luton
IADLTN
Washington, D.C. Dulles Intl
Wed 1/13
7:40 pm-9:00 pm
2 stops20h 20m
London Luton
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
Washington, D.C.London
IAD Washington, D.C. Dulles Intl - STN London Stansted
IADSTN
Washington, D.C. Dulles Intl
Tue 12/8
5:25 pm-12:35 pm
3 stops38h 10m
London Stansted
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
Washington, D.C.London
IAD Washington, D.C. Dulles Intl - LTN London Luton
IADLTN
Washington, D.C. Dulles Intl
Wed 5/5
8:30 pm-9:55 pm
2 stops20h 25m
London Luton
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
Washington, D.C.London
IAD Washington, D.C. Dulles Intl - STN London Stansted
IADSTN
Washington, D.C. Dulles Intl
Thu 11/26
7:40 pm-7:25 pm
3 stops18h 45m
London Stansted
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
Washington, D.C.London
IAD Washington, D.C. Dulles Intl - LGW London Gatwick
IADLGW
Washington, D.C. Dulles Intl
Wed 1/13
5:15 pm-8:25 am
1 stop10h 10m
London Gatwick
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | 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*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
Everything you need to know about your flight from Washington, D.C. to London
Boarding
Food
Comfort
Crew
Entertainment
Overall
Reviews
Michael,Nov 2026
LAS - LHR
Boarding
Food
Comfort
Crew
Entertainment
Overall
Reviews
Michael,Nov 2026
LAS - LHR
Boarding
Food
Comfort
Crew
Entertainment
Overall
Reviews
Michael,Nov 2026
LAS - LHR
Boarding
Food
Comfort
Crew
Entertainment
Overall
Reviews
Michael,Nov 2026
LAS - LHR
Boarding
Food
Comfort
Crew
Entertainment
Overall
Reviews
Michael,Nov 2026
LAS - LHR
Boarding
Food
Comfort
Crew
Entertainment
Overall
Reviews
Michael,Nov 2026
LAS - LHR
Find useful and relevant information for your journey from Washington, D.C. to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$390 | Average$944 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$424 | Average$636 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$450 | Average$1,001 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$462 | Average$982 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$465 | Average$729 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$500 | Average$914 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$515 | Average$797 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$581 | Average$1,069 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$591 | Average$869 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$593 | Average$985 | FlexibilityNo cancel fee | On-time79% |