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$310+ Cheap flights from Dulles Intl (IAD) to the United Kingdom

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
may. 25 — jun. 11
lun. 5/25
lun. 6/1
1 adult, Economy
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Cheap flight deals from Dulles Intl to United Kingdom

Cheapest flights from Dulles Intl to United Kingdom
Explore the most affordable flight options available from Dulles Intl to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 25, 2026.

This deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/610:25 pm
IAD
-
MAN
1 stop12h 05m
British Airways
lun. 5/116:55 am
MAN
-
IAD
1 stop13h 50m
British Airways
Deal found 4/20$652
This FlightHub deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/108:20 pm
IAD
-
LHR
1 stop16h 20m
Scandinavian Airlines
dom. 10/119:05 pm
LHR
-
IAD
2 stops24h 55m
Scandinavian Airlines
Deal found 4/20$693
This Mytrip deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/108:30 pm
IAD
-
STN
3 stops23h 20m
Multiple Airlines
mar. 5/1910:00 pm
STN
-
IAD
3 stops27h 29m
Multiple Airlines
Deal found 4/21$700
This Mytrip deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/811:20 pm
IAD
-
STN
2 stops20h 30m
Multiple Airlines
mar. 5/127:05 am
STN
-
IAD
2 stops17h 15m
Multiple Airlines
Deal found 4/21$702
This Mytrip deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/48:30 pm
IAD
-
STN
2 stops23h 20m
Multiple Airlines
lun. 5/1110:00 pm
STN
-
IAD
2 stops27h 29m
Multiple Airlines
Deal found 4/23$703
This FlightHub deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/98:20 pm
IAD
-
LHR
2 stops35h 35m
Scandinavian Airlines
lun. 10/126:40 am
LHR
-
IAD
1 stop15h 20m
Scandinavian Airlines
Deal found 4/21$703
This Mytrip deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/108:30 pm
IAD
-
STN
2 stops21h 50m
Multiple Airlines
mié. 6/34:25 pm
STN
-
IAD
2 stops27h 45m
Multiple Airlines
Deal found 4/24$705
This deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/195:05 pm
IAD
-
LGW
1 stop11h 40m
TAP AIR PORTUGAL
mar. 5/2610:35 am
LGW
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Deal found 4/20$706
This KAYAK deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/148:20 pm
IAD
-
LHR
2 stops35h 35m
Scandinavian Airlines
jue. 9/176:40 am
LHR
-
IAD
1 stop15h 20m
Scandinavian Airlines
Deal found 4/24$706
This Mytrip deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/48:30 pm
IAD
-
STN
2 stops17h 45m
Multiple Airlines
mar. 5/1910:00 pm
STN
-
IAD
3 stops28h 25m
Multiple Airlines
Deal found 4/19$707
This FlightHub deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/221:20 pm
IAD
-
LGW
1 stop15h 35m
Turkish Airlines
mar. 9/295:35 pm
LGW
-
IAD
1 stop23h 00m
Turkish Airlines
Deal found 4/20$708
This Mytrip deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/108:30 pm
IAD
-
STN
2 stops21h 50m
Multiple Airlines
mar. 6/99:10 am
STN
-
IAD
2 stops35h 00m
Multiple Airlines
Deal found 4/20$710

Find flight deals from Dulles Intl to United Kingdom

Keep the following information in mind while searching for Dulles Intl to United Kingdom flight deals. Data was last updated abril 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$652

One-way from

$310
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$710

Good round-trip deal

$927 or less

Good one-way deal

$495 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-London (LON) flights.
Search Deals
From Washington, D.C. Dulles Intl to United Kingdom
Search Deals
One-way flight from Washington, D.C. Dulles Intl to United Kingdom
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($134 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to United Kingdom.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to United Kingdom.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to United Kingdom that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated abril 25, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mié. 9/30

10:55 pm-11:20 am

Nonstop7h 25m

London Heathrow

vie. 10/9

6:30 am-3:35 pm

1 stop14h 05m

$853

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

mié. 8/12

6:15 pm-9:25 am

1 stop10h 10m

London Gatwick

vie. 8/21

10:25 am-7:35 pm

1 stop14h 10m

$864

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

dom. 10/4

6:15 pm-9:25 am

1 stop10h 10m

London Gatwick

mar. 10/20

10:35 am-11:02 pm

2 stops17h 27m

$875

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

lun. 8/17

7:00 am-9:40 am

2 stops21h 40m

London Gatwick

jue. 8/27

10:25 am-10:59 pm

2 stops17h 34m

$879

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

dom. 10/4

5:45 pm-6:20 am

Nonstop7h 35m

London Heathrow

jue. 10/15

2:00 pm-5:25 pm

Nonstop8h 25m

$881

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

mar. 8/18

5:40 pm-8:50 am

1 stop10h 10m

London City

mar. 8/25

10:00 am-3:35 pm

1 stop10h 35m

$882

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

dom. 5/10

5:40 pm-8:50 am

1 stop10h 10m

London City

mar. 5/19

10:00 am-3:35 pm

1 stop10h 35m

$882

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

mié. 8/19

6:10 pm-8:50 am

1 stop9h 40m

London City

mié. 8/26

9:20 am-7:16 pm

2 stops14h 56m

$892

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

jue. 8/20

6:30 pm-6:55 am

Nonstop7h 25m

London Heathrow

mar. 8/25

6:50 am-2:20 pm

1 stop12h 30m

$902

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mié. 8/26

10:55 pm-11:20 am

Nonstop7h 25m

London Heathrow

dom. 8/30

8:40 am-3:35 pm

1 stop11h 55m

$902

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/19

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Dulles Intl to United Kingdom

Have a flexible travel schedule? Discover the best time to fly to United Kingdom from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to the United Kingdom

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom?

Booking 54 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport to United Kingdom. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom (average of $416). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $1,014). 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.

What is the cheapest time of day to fly from IAD to GB?

Find hourly flight availability from Dulles Intl to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 25, 2026.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to United Kingdom in the morning. By choosing this option you can save up to 50% on the cost of your flight, compared to a flight at noon.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to United Kingdom

Explore weekly flight availability from Dulles Intl to United Kingdom. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated abril 25, 2026.

The most flights from IAD to GB0 are scheduled on a Monday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (26 on average).

How often are flights from Washington, D.C. to the United Kingdom delayed?

About 20% of weekly flights between Washington, D.C. and United Kingdom have experienced delays in the past year, with the average delay time being 168 minutes.

What is the most punctual flight time for Washington, D.C. to the United Kingdom flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

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.

Which airline has the best punctuality record on Washington, D.C. to the United Kingdom flights?

Over the last year, British Airways have had the lowest number of delays on this route, with just 15% of flights being delayed.

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to United Kingdom. Reviews last updated abril 25, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to the United Kingdom, such as United Airlines,Aer Lingus, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,650 reviews

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,650 reviews
United Airlines
7.4
Good
9,650 reviews

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Aer Lingus
7.3
Good
1,528 reviews
United Airlines
7.4
Good
9,650 reviews

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
American Airlines
7.1
Good
11,672 reviews
United Airlines
7.4
Good
9,650 reviews

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Icelandair
7.0
Good
641 reviews
United Airlines
7.4
Good
9,650 reviews

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
British Airways
6.7
Okay
7,912 reviews
United Airlines
7.4
Good
9,650 reviews

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to United Kingdom. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to United Kingdom?

    Airlines like Delta, Virgin Atlantic, and British Airways fly from Washington, D.C. Dulles Intl Airport to United Kingdom in about 7h 25m. The time it takes to get you to your destination can typically vary by up to 2h 45m. The distance between Washington, D.C. Dulles Intl Airport and United Kingdom is about 3664 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to United Kingdom one-way?

    One-way options have recently been found by users for as low as $202 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $218 and SWISS from $280 one-way.

  • What are the most popular routes from Washington, D.C. Dulles Intl Airport to United Kingdom?

    Most travelers choose Washington, D.C. Dulles Intl - London Heathrow, Washington, D.C. Dulles Intl - London Gatwick or Washington, D.C. Dulles Intl - London Stansted when deciding on the best route from Washington, D.C. Dulles Intl Airport to United Kingdom.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to United Kingdom?

    Before booking your flight to United Kingdom from Washington, D.C. Dulles Intl Airport, check out the most reliable airlines to get you to your destination on time: United Airlines (89%), Delta (85%), Virgin Atlantic( 85%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to United Kingdom?

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to United Kingdom is $365. On average you can expect to pay $2,290. The most popular route, (Washington, D.C. Dulles Intl - London Heathrow), can usually be booked for $723.

  • Can I find deals for flights from Dulles Intl to United Kingdom that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to United Kingdom flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to United Kingdom?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to United Kingdom.

  • Can I find deals for business class flights from Dulles Intl to United Kingdom?

    Yes. Cheapflights offers flight deals from Dulles Intl to United Kingdom by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom (average of $416). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $1,014). 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.

See more FAQs

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Alternative routes for Dulles Intl to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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Dulles Intl to Amsterdam flights
Dulles Intl to Vicenza flights
Reagan-National to Madrid flights
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Baltimore to Madrid flights
Baltimore to Leonardo da Vinci/Fiumicino flights
Reagan-National to Leonardo da Vinci/Fiumicino flights
Baltimore to Istanbul flights
Dulles Intl to Munich flights
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Baltimore to Dublin flights
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Baltimore to Athens flights
Baltimore to Lisbon flights
Dulles Intl to Bruxelles-National flights
Reagan-National to Barcelona-El Prat flights
Dulles Intl to Luton flights
Reagan-National to Lisbon flights
Baltimore to Barcelona-El Prat flights
Baltimore to Frankfurt flights
Dulles Intl to Copenhagen flights
Baltimore to Keflavik Intl flights
Dulles Intl to Vienna flights

Top 10 airlines flying from Dulles Intl to United Kingdom

Discover the top 10 airlines that operate flights from Dulles Intl to United Kingdom. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated abril 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$309Average$498FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$398Average$633FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$454Average$710FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$520Average$807FlexibilityNo cancel feeOn-time70%
DeltaCheapest$530Average$836FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$536Average$863FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$558Average$915FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$561Average$851FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$562Average$805FlexibilityNo cancel feeOn-time71%
IberiaCheapest$565Average$770FlexibilityNo cancel feeOn-time77%

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