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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £172

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 7/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LON
27 Nov — 4 Dec1
1 adult

The best prices from Washington, D.C. Dulles Intl to London are usually found in January or October, booked 85 days in advance, depart on a Saturday or Tuesday and return on a Tuesday

Cheap flight deals from Dulles Intl to London

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 22 November 2024.

Round-trip from

£433

One-way from

£172

Popular in

June

Cheapest in

January
PLAY
  • PLAY
  • 12/5-27/5
  • 2 total stops
  • 21h 50m total
  • Washington, D.C. to London
Icelandair
  • Icelandair
  • 7/1
  • 1 total stop
  • 10h 15m total
  • Washington, D.C. to London
High demand for flights, 30% potential price rise
Best time to find cheap flights, 18% potential price drop

Find flight deals from Dulles Intl to London

Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 November 2024.

Mon 9/1219:40IAD - LHR
1 stop10h 10mIcelandair
Sun 12/112:15LHR - IAD
1 stop11h 10mIcelandair
Deal found 20/11£437
Mon 9/1217:10IAD - LHR
1 stop23h 30mScandinavian Airlines
Wed 18/1206:40LHR - IAD
1 stop14h 00mScandinavian Airlines
Deal found 22/11£439
Mon 30/1219:40IAD - LGW
1 stop10h 15mIcelandair
Mon 13/111:55LGW - IAD
1 stop11h 30mIcelandair
Deal found 21/11£443
Fri 6/1220:45IAD - LHR
1 stop17h 30mMultiple Airlines
Sun 8/1206:00LHR - IAD
1 stop13h 35mMultiple Airlines
Deal found 21/11£470
Mon 9/1217:10IAD - STN
1 stop17h 45mMultiple Airlines
Sun 12/106:20STN - IAD
1 stop14h 20mMultiple Airlines
Deal found 21/11£471
Mon 9/1218:45IAD - LHR
Nonstop7h 30mVirgin Atlantic
Wed 18/1206:30LHR - IAD
1 stop14h 15mVirgin Atlantic
Deal found 22/11£473
Fri 6/1222:30IAD - LHR
Nonstop7h 35mUnited Airlines
Sun 8/1207:00LHR - IAD
1 stop12h 55mUnited Airlines
Deal found 21/11£481
Wed 11/1218:45IAD - LHR
Nonstop7h 30mDelta
Wed 18/1212:25LHR - IAD
Nonstop8h 40mDelta
Deal found 21/11£496
Tue 3/1217:30IAD - LGW
1 stop17h 15mTAP AIR PORTUGAL
Fri 17/110:45LGW - IAD
2 stops15h 15mTAP AIR PORTUGAL
Deal found 20/11£504
Mon 9/1217:10IAD - LGW
1 stop13h 20mMultiple Airlines
Wed 18/1206:50LGW - IAD
1 stop13h 50mMultiple Airlines
Deal found 22/11£504
Wed 4/1210:35IAD - LHR
2 stops15h 35mAir Canada
Wed 11/1211:10LHR - IAD
2 stops15h 10mAir Canada
Deal found 20/11£505
Sun 24/1118:10IAD - STN
1 stop10h 50mPLAY
Tue 26/1111:00STN - IAD
1 stop11h 00mPLAY
Deal found 20/11£508

Find flights from Dulles Intl to London within your budget

Customise your flight search to find flights from Dulles Intl to London 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 915,844 searches. Data last updated 22 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 12/5

18:50-10:40

1 stop10h 50m

London Stansted

Tue 27/5

11:40-17:40

1 stop11h 00m

£433

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Sat 15/3

19:10-13:00

1 stop13h 50m

London Luton

Sat 22/3

06:25-18:00

1 stop15h 35m

£433

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 8/4

20:30-11:45

1 stop10h 15m

London Gatwick

Mon 21/4

15:40-19:15

1 stop32h 35m

£434

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 9/1

19:40-10:50

1 stop10h 10m

London Heathrow

Sun 19/1

12:15-18:25

1 stop11h 10m

£434

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 26/2

17:10-16:25

2 stops18h 15m

London Heathrow

Sun 2/3

18:40-15:40

1 stop26h 00m

£435

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 11/3

18:30-15:45

1 stop17h 15m

London Gatwick

Mon 17/3

16:35-15:30

1 stop26h 55m

£442

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sun 12/1

17:10-16:35

1 stop18h 25m

London Stansted

Mon 20/1

07:40-15:40

1 stop13h 00m

£446

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 5/3

21:55-10:05

Nonstop7h 10m

London Heathrow

Wed 12/3

16:30-20:45

Nonstop8h 15m

£451

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 28/2

19:40-10:55

1 stop10h 15m

London Gatwick

Tue 4/3

08:00-17:00

1 stop14h 00m

£453

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 20/1

19:15-21:35

1 stop21h 20m

London Heathrow

Thu 23/1

06:00-15:00

1 stop14h 00m

£458

Flights are sorted by cheapest return flights first.

Deals found on 22/11

Showing 1-10 of 60 results
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Best time to book a flight from Dulles Intl to London

Have a flexible travel schedule? Discover the best time to fly to London from Dulles Intl with our price prediction graph.
Estimated return 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.

Travel insights for flights from Dulles Intl to London

Get recent, data-driven insights about flights from Dulles Intl to London including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from Dulles Intl to London. Price data was last updated on 15 November 2024.

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to London, you should look to book at least 85 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of £112). Flying from Washington, D.C. Dulles Intl Airport to London in July is currently the most expensive (average of £160). 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 LON?

Find hourly flight availability from Dulles Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 November 2024.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to London at midday. By choosing this option you can save up to 3% on the cost of your flight, compared to a flight in the afternoon.

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

Explore weekly flight availability from Dulles Intl to London. 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 22 November 2024.

The most flights from IAD to LON are scheduled on a Thursday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 22 November 2024.
Peruse reviews from past customers who have flown with Iberia, TAP AIR PORTUGAL and SWISS from Washington, D.C. to London to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very Good
8,747 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

8.0
Very Good
8,747 reviews
8.0
Very Good
8,747 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

7.8
Good
1,346 reviews
8.0
Very Good
8,747 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

7.7
Good
1,299 reviews
8.0
Very Good
8,747 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

7.6
Good
804 reviews
8.0
Very Good
8,747 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

7.6
Good
1,637 reviews
8.0
Very Good
8,747 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to London round-trip?

    Flying on PLAY is currently your cheapest option to London, with prices starting at £433. Additional return tickets that might be worth considering are offered by Icelandair and Scandinavian Airlines, with the lowest prices starting at £434 and £435, respectively. PLAY is 26% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airline one-way is Icelandair, with whom users have recently found tickets for as low as £172. However, be on the lookout for offers from PLAY and TAP AIR PORTUGAL, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to London for a low price.

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

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to London on time: Air France (82%), Virgin Atlantic (76%), Singapore Airlines (76%).

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

    Looking at all options, your cheapest flight can be booked for £303. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £359 on average our data indicates £936 when flying from Washington, D.C. Dulles Intl Airport to London.

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

    Yes. In addition to deals on Dulles Intl to London flights, Cheapflights offers holiday packages that include both flights and hotel.

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to London 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 London?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of £112). Flying from Washington, D.C. Dulles Intl Airport to London in July is currently the most expensive (average of £160). 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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Top 10 airlines flying from Dulles Intl to London

Discover the top 10 airlines that operate flights from Dulles Intl to London. 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 915,844 searches. Data last updated 22 November 2024.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£329Average£500FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£382Average£549FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£462Average£586FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapest£466Average£654FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapest£469Average£750FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£474Average£591FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£478Average£587FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£492Average£560FlexibilityNo cancel feeOn-time75%
Search KLM flights
American AirlinesCheapest£493Average£796FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
LufthansaCheapest£498Average£676FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

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How does Cheapflights help users find flights from Dulles Intl to London?

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Can Cheapflights find flights from Dulles Intl to London with no change fees?

Certainly. Search results for flights to London from Dulles Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Dulles Intl to London become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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