Find Cheap Flights from Washington to London (WAS - LON)

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Sat 12/9
Sat 12/16
Any month
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Good to Know

Low Season:
February
Best time to beat the crowds
3%
expected price decrease
High Season:
July
Most popular time to fly
16%
expected price increase
Average Price:
$2064
(avg. price over the last 2 weeks)
Good Deal:
$1719
or less (round trip)

When to Book Flights from Washington to London

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $1719 or less.
The cheapest flight from Washington to London was found 66 days before departure, on average.
Book at least 5 weeks before departure in order to get a below-average price.
High season is considered to be June, July and August. The cheapest month to fly is February.
Morning departure is around 1% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Washington to London Flights

How long does a flight from Washington to London take?
An average nonstop flight takes 10h 10m, covering a distance of 3665 miles.
How many flights are there between Washington and London?
There are 299 (nonstop) flights between Washington and London per week, averaging 42 per day.
Which airlines provide the cheapest flights from Washington to London?
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines ($513), Icelandair ($513) and Royal Air Maroc ($554).
Do I need a passport to fly between Washington and London?
Yes.
Which airlines fly most frequently between Washington and London?
Finnair (5 times daily), British Airways (5 times daily), American Airlines (4 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Washington to London?
For Washington to London, Monday is the cheapest day to fly on average and Friday is the most expensive. Flying from London back to Washington, the best deals are generally found on Friday, with Thursday being the most expensive.

Book cheap flights from Washington to London (round-trip)

Airports
Origin
Washington
$513
only
$513
Destination
London
$513
only
$513
$515
only
$515
$513
only
$513
Mon, Jan 22
IAD
LGW
12h 21m
Thu, Jan 25
LGW
IAD
22h 48m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Apr 22
IAD
LHR
18h 35m
Tue, Apr 24
LHR
IAD
11h 05m
Trip: 3 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6357 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
ZRH
Mediocre 2.0

Everything

ORD
KEF
Okay 5.3

Nothing out of ordinary that makes you guys stand out positively.

I paid $440 for my ticket and additional $190 for my luggage. With over $600 worth of flight, l can’t even get a small free meal, not even a snack. That is bad. Any flight within United State, they would offer snacks, talkless of flight that is over 6 hrs. I will never fly Icelandair anymore.

KEF
DEN
Excellent 10.0

Such friendly staff and great in flight entertainment

SEA
KEF
Excellent 9.6

Free Hot drink, Headrest entertainment

No peanuts...I dont really care

BOS
KEF
Okay 4.0

Seats are uncomfortable, very uncomfortable compared to other airlines.

Fri, Jan 26
IAD
LGW
12h 05m
Sun, Jan 28
LGW
IAD
13h 15m
Trip: 3 days
6.5GoodShow reviews
Overall 6.5 Good
Based on 1456 reviews
Overall
6.6
Boarding
6.6
Comfort
6.7
Crew
6.9
Entertainment
6.1
Food
6.3
BCN
CMN
Okay 5.6

Ground agent at the counter was polite and very good customer service.

The TV monitor needs to be fixed on what was shown - terrible reception.

RBA
ORY
Okay 5.0

late boarding. no info for reason for late departure offered. crew on the counter rude

BJL
CMN
Excellent 8.0

Friendly crew helpful at check in

COO
CMN
Mediocre 2.0

was not allowed to check in even tho was at the airport 40 minutes before departure. No refund or accommodations.

CMN
JFK
Excellent 8.0

Food

Thu, Apr 26
IAD
LTN
11h 35m
Mon, Apr 30
LTN
IAD
18h 10m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Jan 26
IAD
LHR
10h 35m
Mon, Feb 5
LHR
IAD
11h 05m
Trip: 11 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6357 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
ORD
KEF
Okay 5.3

Nothing out of ordinary that makes you guys stand out positively.

I paid $440 for my ticket and additional $190 for my luggage. With over $600 worth of flight, l can’t even get a small free meal, not even a snack. That is bad. Any flight within United State, they would offer snacks, talkless of flight that is over 6 hrs. I will never fly Icelandair anymore.

BOS
KEF
Okay 4.0

Seats are uncomfortable, very uncomfortable compared to other airlines.

SEA
KEF
Excellent 9.6

Free Hot drink, Headrest entertainment

No peanuts...I dont really care

KEF
ZRH
Okay 4.0

Seats are uncomfortable, very uncomfortable compared to other airlines.

KEF
DEN
Excellent 10.0

Such friendly staff and great in flight entertainment

Sun, Jan 14
IAD
LGW
31h 19m
Wed, Jan 24
LGW
IAD
43h 09m
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Feb 21
IAD
LHR
18h 55m
Fri, Feb 23
LHR
IAD
26h 55m
Trip: 3 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6357 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
ZRH
Mediocre 2.0

Everything

ORD
KEF
Okay 5.3

Nothing out of ordinary that makes you guys stand out positively.

I paid $440 for my ticket and additional $190 for my luggage. With over $600 worth of flight, l can’t even get a small free meal, not even a snack. That is bad. Any flight within United State, they would offer snacks, talkless of flight that is over 6 hrs. I will never fly Icelandair anymore.

KEF
LGW
Okay 5.3

I will never fly Icelandair anymore because they don’t provide any free meal for passengers. Even the expensive meal l paid for, taste horrible. I’ve never seen anything like that. Giving meals or snacks are part of passengers comfort.

MUC
KEF
Okay 5.0

Lack of food they charged $16 for an under average salad and they don’t take cash and for some reason my debit card failed to go through. If it hadn’t been for the generosity of a fellow passenger who offered to pay for it on her credit card ( I gave her the $16). I would have remained hungry

KEF
ZRH
Okay 4.0

Seats are uncomfortable, very uncomfortable compared to other airlines.

Sun, Jan 14
IAD
LGW
31h 19m
Wed, Jan 17
LGW
IAD
43h 09m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Feb 24
IAD
LHR
10h 35m
Thu, Mar 1
LHR
IAD
11h 05m
Trip: 6 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6357 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
ORD
Okay 5.3

Same as above.

KEF
ZRH
Mediocre 2.0

Everything

EWR
KEF
Mediocre 2.3

The movie selection was good, but u had to buy the headphone wich was disappointing

Everything

KEF
LGW
Okay 5.3

I will never fly Icelandair anymore because they don’t provide any free meal for passengers. Even the expensive meal l paid for, taste horrible. I’ve never seen anything like that. Giving meals or snacks are part of passengers comfort.

KEF
ZRH
Okay 4.0

Seats are uncomfortable, very uncomfortable compared to other airlines.

Tue, May 22
IAD
LTN
11h 20m
Tue, Jun 5
LTN
IAD
11h 45m
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Apr 11
IAD
LGW
19h 10m
Fri, Apr 13
LGW
IAD
11h 00m
Trip: 3 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6357 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
ORD
Okay 5.3

The seats are so uncomfortable and small. The arm rest also doesn't go up when there was no one in the middle seat - which would have created more room.

LGW
KEF
Okay 5.3

Icelandair need to re-assess their policy and start feeding their passengers. It’s was a horrible experience.

MUC
KEF
Okay 5.0

Lack of food they charged $16 for an under average salad and they don’t take cash and for some reason my debit card failed to go through. If it hadn’t been for the generosity of a fellow passenger who offered to pay for it on her credit card ( I gave her the $16). I would have remained hungry

EWR
KEF
Mediocre 2.3

The movie selection was good, but u had to buy the headphone wich was disappointing

Everything

KEF
ZRH
Mediocre 2.0

Everything

Wed, Apr 18
IAD
LTN
11h 05m
Tue, Apr 24
LTN
IAD
18h 10m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Feb 21
IAD
LHR
18h 55m
Fri, Mar 2
LHR
IAD
11h 05m
Trip: 10 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6357 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
ZRH
Mediocre 2.0

Everything

ORD
KEF
Okay 5.3

Nothing out of ordinary that makes you guys stand out positively.

I paid $440 for my ticket and additional $190 for my luggage. With over $600 worth of flight, l can’t even get a small free meal, not even a snack. That is bad. Any flight within United State, they would offer snacks, talkless of flight that is over 6 hrs. I will never fly Icelandair anymore.

KEF
LGW
Okay 5.3

I will never fly Icelandair anymore because they don’t provide any free meal for passengers. Even the expensive meal l paid for, taste horrible. I’ve never seen anything like that. Giving meals or snacks are part of passengers comfort.

KEF
DEN
Excellent 10.0

Such friendly staff and great in flight entertainment

BOS
KEF
Okay 4.0

Seats are uncomfortable, very uncomfortable compared to other airlines.

Thu, Apr 19
IAD
LTN
11h 35m
Thu, Apr 26
LTN
IAD
18h 10m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Mar 8
IAD
LHR
10h 35m
Thu, Mar 15
LHR
IAD
11h 05m
Trip: 7 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6357 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
EWR
KEF
Mediocre 2.3

The movie selection was good, but u had to buy the headphone wich was disappointing

Everything

KEF
ORD
Okay 5.3

Same as above.

LGW
KEF
Okay 5.3

Icelandair need to re-assess their policy and start feeding their passengers. It’s was a horrible experience.

KEF
LGW
Okay 5.3

I will never fly Icelandair anymore because they don’t provide any free meal for passengers. Even the expensive meal l paid for, taste horrible. I’ve never seen anything like that. Giving meals or snacks are part of passengers comfort.

KEF
ZRH
Okay 4.0

Seats are uncomfortable, very uncomfortable compared to other airlines.

Thu, Apr 19
IAD
LGW
11h 55m
Thu, Apr 26
LGW
IAD
17h 40m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Jan 20
IAD
LGW
10h 10m
Thu, Feb 1
LGW
IAD
11h 20m
Trip: 13 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6357 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
ORD
Okay 5.3

Same as above.

MUC
KEF
Okay 5.0

Lack of food they charged $16 for an under average salad and they don’t take cash and for some reason my debit card failed to go through. If it hadn’t been for the generosity of a fellow passenger who offered to pay for it on her credit card ( I gave her the $16). I would have remained hungry

ORD
KEF
Okay 5.3

Nothing out of ordinary that makes you guys stand out positively.

I paid $440 for my ticket and additional $190 for my luggage. With over $600 worth of flight, l can’t even get a small free meal, not even a snack. That is bad. Any flight within United State, they would offer snacks, talkless of flight that is over 6 hrs. I will never fly Icelandair anymore.

BOS
KEF
Okay 4.0

Seats are uncomfortable, very uncomfortable compared to other airlines.

KEF
ORD
Okay 5.3

The seats are so uncomfortable and small. The arm rest also doesn't go up when there was no one in the middle seat - which would have created more room.

Thu, May 3
IAD
LTN
18h 15m
Mon, May 7
LTN
IAD
11h 45m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Feb 19
IAD
LGW
10h 10m
Wed, Mar 7
LGW
IAD
11h 15m
Trip: 17 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6357 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
DEN
Excellent 10.0

Such friendly staff and great in flight entertainment

KEF
ORD
Okay 5.3

Same as above.

BOS
KEF
Okay 4.0

Seats are uncomfortable, very uncomfortable compared to other airlines.

MUC
KEF
Okay 5.0

Lack of food they charged $16 for an under average salad and they don’t take cash and for some reason my debit card failed to go through. If it hadn’t been for the generosity of a fellow passenger who offered to pay for it on her credit card ( I gave her the $16). I would have remained hungry

KEF
LGW
Okay 5.3

I will never fly Icelandair anymore because they don’t provide any free meal for passengers. Even the expensive meal l paid for, taste horrible. I’ve never seen anything like that. Giving meals or snacks are part of passengers comfort.

Thu, May 3
IAD
LGW
18h 35m
Mon, May 7
LGW
IAD
17h 40m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Show more results
*
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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.