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$206+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
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 diciembre 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/317:40 pmIAD - MAN
1 stop10h 05mIcelandair
mié. 1/1411:55 amMAN - IAD
1 stop11h 35mIcelandair
Deal found 12/10$568
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/315:31 pmIAD - LHR
1 stop12h 44mMultiple Airlines
mié. 1/147:30 amLHR - IAD
1 stop12h 05mMultiple Airlines
Deal found 12/10$574
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/317:40 pmIAD - LGW
1 stop10h 15mIcelandair
mar. 1/1311:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$575
This KAYAK deal was found by Cheapflights users on 12/10. 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.
mié. 12/317:40 pmIAD - LGW
1 stop10h 15mIcelandair
jue. 1/1511:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$577
This Cheapflightsfares deal was found by Cheapflights users on 12/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/307:40 pmIAD - LGW
1 stop10h 15mIcelandair
mar. 1/1311:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$579
This Cheapflightsfares deal was found by Cheapflights users on 12/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/105:40 pmIAD - MAN
1 stop11h 50mMultiple Airlines
dom. 12/149:10 amMAN - IAD
1 stop12h 30mMultiple Airlines
Deal found 12/10$580
This KAYAK deal was found by Cheapflights users on 12/10. 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. 12/297:40 pmIAD - LGW
1 stop10h 15mIcelandair
jue. 1/1511:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$592
This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/316:00 pmIAD - LHR
1 stop17h 50mLufthansa
mié. 1/147:40 amLHR - IAD
1 stop12h 55mLufthansa
Deal found 12/11$594
This Kiwi.com deal was found by Cheapflights users on 12/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/125:20 pmIAD - GLA
2 stops14h 00mLufthansa
mar. 12/161:10 pmGLA - IAD
1 stop12h 05mLufthansa
Deal found 12/11$602
This Cheapflightsfares deal was found by Cheapflights users on 12/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/1010:20 pmIAD - MAN
2 stops14h 35mSWISS
dom. 12/149:10 amMAN - IAD
1 stop12h 30mSWISS
Deal found 12/10$603
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/3010:08 pmIAD - LHR
1 stop30h 12mUnited Airlines
mar. 1/139:00 amLHR - IAD
1 stop12h 40mUnited Airlines
Deal found 12/10$605
This FlightHub deal was found by Cheapflights users on 12/10. 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.
lun. 12/297:40 pmIAD - LGW
1 stop10h 15mIcelandair
lun. 1/1211:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$606

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 diciembre 12, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$487
(Mytrip)

One-way from

$206
(Booking.com)

Popular in

December

Cheapest in

September

Average price

$977

Good round-trip deal

$691 or less

Good one-way deal

$422 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. 6% potential increase in price ($53 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to United Kingdom.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to United Kingdom.
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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 diciembre 12, 2025.
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

Dulles Intl

Fly to

United Kingdom

Route

Depart

Return

Price

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

dom. 3/1

7:40 pm-9:55 am

1 stop9h 15m

Glasgow Intl

jue. 3/5

12:35 pm-6:30 pm

1 stop10h 55m

$494

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

mié. 3/4

7:40 pm-9:55 am

1 stop9h 15m

Glasgow Intl

sáb. 3/14

12:35 pm-7:30 pm

1 stop10h 55m

$517

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

jue. 1/8

7:40 pm-9:55 am

1 stop9h 15m

Glasgow Intl

lun. 2/2

12:35 pm-6:30 pm

1 stop10h 55m

$517

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

jue. 1/8

7:40 pm-9:55 am

1 stop9h 15m

Glasgow Intl

vie. 2/6

12:35 pm-6:30 pm

1 stop10h 55m

$517

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

jue. 2/5

5:30 pm-10:35 am

1 stop12h 05m

Manchester

dom. 2/8

6:05 pm-3:15 pm

1 stop26h 10m

$532

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

mar. 2/17

5:30 pm-10:35 am

1 stop12h 05m

Manchester

dom. 2/22

6:05 pm-3:15 pm

1 stop26h 10m

$532

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

sáb. 1/24

12:23 pm-9:20 am

2 stops15h 57m

London Heathrow

sáb. 1/31

6:40 am-6:50 pm

2 stops17h 10m

$574

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

lun. 1/26

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

lun. 2/2

11:00 am-2:35 pm

2 stops32h 35m

$574

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

sáb. 1/31

8:30 pm-8:55 pm

2 stops19h 25m

London Luton

vie. 2/6

9:45 pm-6:50 pm

2 stops26h 05m

$575

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

sáb. 1/24

7:40 pm-4:05 pm

2 stops15h 25m

London Luton

sáb. 1/31

9:00 am-6:30 pm

2 stops14h 30m

$582

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 60 results
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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

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

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom (average of $423). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $614). 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 diciembre 12, 2025.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to United Kingdom in the afternoon. By choosing this option you can save up to 33% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to United Kingdom?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to United Kingdom. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to United Kingdom flight should consider departing on Saturday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 diciembre 12, 2025.

The most flights from IAD to GB0 are scheduled on a Wednesday (26 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (18 on average).

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

About 21% of weekly flights between Washington, D.C. and United Kingdom have experienced delays in the past year, with the average delay time being 159 minutes.

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

Historically, flights departing in the morning 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?

Monday tends to have the lowest number of delays on this route, whereas Saturday 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, Virgin Atlantic 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 diciembre 12, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to the United Kingdom, such as United Airlines, Aer Lingus, and Icelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,093 reviews

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,093 reviews
United Airlines
7.4
Good
9,093 reviews

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Aer Lingus
7.2
Good
1,394 reviews
United Airlines
7.4
Good
9,093 reviews

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Icelandair
7.0
Good
589 reviews
United Airlines
7.4
Good
9,093 reviews

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Iberia
7.0
Good
3,045 reviews
United Airlines
7.4
Good
9,093 reviews

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
British Airways
6.7
Okay
7,571 reviews
United Airlines
7.4
Good
9,093 reviews

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 Icelandair, TAP AIR PORTUGAL, and Scandinavian Airlines fly from Washington, D.C. Dulles Intl Airport to United Kingdom in about 9h 15m. The time it takes to get you to your destination can typically vary by up to 6h 42m. The distance between Washington, D.C. Dulles Intl Airport and United Kingdom is about 3426 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 $182 on Icelandair. Other airlines that offer cheap prices include Scandinavian Airlines from $213 and TAP AIR PORTUGAL from $213 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 City 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: Air France (90%), Delta (90%), Virgin Atlantic( 90%).

  • 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 $346. On average you can expect to pay $2,094. The most popular route, (Washington, D.C. Dulles Intl - London Heathrow), can usually be booked for $423.

  • 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom (average of $423). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $614). 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.
Dulles Intl to Heathrow flights
Dulles Intl to Charles de Gaulle flights
Baltimore to Heathrow flights
Dulles Intl to Istanbul flights
Dulles Intl to Leonardo da Vinci/Fiumicino flights
Dulles Intl to Lisbon flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Dulles Intl to Madrid flights
Dulles Intl to London City flights
Dulles Intl to Dublin flights
Dulles Intl to Barcelona-El Prat flights
Dulles Intl to Frankfurt flights
Baltimore to Gatwick flights
Dulles Intl to Orly flights
Dulles Intl to Athens flights
Reagan-National to Gatwick flights
Dulles Intl to Amsterdam flights
Dulles Intl to Stansted flights
Baltimore to Charles de Gaulle flights
Reagan-National to Charles de Gaulle flights
Reagan-National to Orly flights
Baltimore to Leonardo da Vinci/Fiumicino flights
Reagan-National to Istanbul flights
Reagan-National to Leonardo da Vinci/Fiumicino flights
Baltimore to Istanbul flights
Baltimore to Madrid flights
Dulles Intl to Luton flights
Reagan-National to Madrid flights
Dulles Intl to Sabiha Gokcen flights
Dulles Intl to Zurich flights
Dulles Intl to Keflavik Intl flights
Baltimore to Lisbon flights
Dulles Intl to Bruxelles-National flights
Reagan-National to Lisbon flights
Dulles Intl to Edinburgh flights
Baltimore to Keflavik Intl flights
Baltimore to Barcelona-El Prat flights
Reagan-National to Barcelona-El Prat flights
Baltimore to Athens flights
Reagan-National to Keflavik Intl flights
Reagan-National to Dublin flights
Dulles Intl to Malpensa flights
Baltimore to Dublin flights
Dulles Intl to Munich flights
Dulles Intl to Vienna flights
Baltimore to Frankfurt flights
Reagan-National to Athens flights
Reagan-National to Frankfurt flights
Baltimore to Luton 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 diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$311Average$870FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$395Average$566FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$424Average$589FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$427Average$628FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$517Average$799FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$536Average$776FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$544Average$738FlexibilityNo cancel feeOn-time70%
DeltaCheapest$559Average$768FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$564Average$913FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$573Average$894FlexibilityNo cancel feeOn-time71%

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