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Cheap flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport from C$ 387

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 13/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
27 Dec — 3 Jan1
1 adult

Cheap flight deals from Dulles Intl to Heathrow

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

Round-trip from

C$ 777

One-way from

C$ 387

Popular in

June

Cheapest in

September

Average price

C$ 1,241
Icelandair
  • Icelandair
  • 15/2-22/2
  • 2 total stops
  • 21h 20m total
  • Washington, D.C. to London
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Icelandair
  • Icelandair
  • 13/1
  • 1 total stop
  • 10h 10m total
  • Washington, D.C. to London
Search Deals
High demand for flights, 17% potential price rise
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Best time to find cheap flights, 3% potential price drop
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Average for round-trip flights in December 2024
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Find flight deals from Dulles Intl to Heathrow

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

Mon 30/125:10 p.m.IAD - LHR
1 stop11h 10mScandinavian Airlines
Fri 10/16:40 a.m.LHR - IAD
1 stop14h 00mScandinavian Airlines
Deal found 22/12C$ 1,068
Mon 30/1210:15 p.m.IAD - LHR
Nonstop7h 35mUnited Airlines
Thu 30/11:30 p.m.LHR - IAD
1 stop11h 50mUnited Airlines
Deal found 22/12C$ 1,085
Sun 29/125:35 p.m.IAD - LHR
1 stop10h 25mDelta
Fri 10/112:25 p.m.LHR - IAD
Nonstop8h 40mDelta
Deal found 22/12C$ 1,227
Tue 24/1210:33 p.m.IAD - LHR
1 stop17h 02mMultiple Airlines
Fri 10/16:00 a.m.LHR - IAD
1 stop13h 35mMultiple Airlines
Deal found 22/12C$ 1,326
Fri 27/129:55 p.m.IAD - LHR
Nonstop7h 10mBritish Airways
Fri 17/14:30 p.m.LHR - IAD
Nonstop8h 15mBritish Airways
Deal found 22/12C$ 1,428
Thu 26/126:00 p.m.IAD - LHR
1 stop19h 40mAustrian Airlines
Mon 20/17:25 p.m.LHR - IAD
1 stop24h 10mAustrian Airlines
Deal found 21/12C$ 1,441
Tue 31/128:45 p.m.IAD - LHR
2 stops14h 55mSWISS
Mon 6/18:05 p.m.LHR - IAD
2 stops46h 55mSWISS
Deal found 22/12C$ 1,556
Mon 23/125:35 p.m.IAD - LHR
1 stop35h 05mBrussels Airlines
Sat 18/111:05 a.m.LHR - IAD
1 stop32h 30mBrussels Airlines
Deal found 22/12C$ 1,733
Fri 27/126:57 p.m.IAD - LHR
1 stop11h 43mVirgin Atlantic
Mon 30/126:30 a.m.LHR - IAD
1 stop14h 15mVirgin Atlantic
Deal found 22/12C$ 1,753
Wed 25/124:41 p.m.IAD - LHR
1 stop13h 59mAir France
Sun 19/16:20 a.m.LHR - IAD
2 stops17h 37mAir France
Deal found 22/12C$ 1,866
Fri 27/126:25 p.m.IAD - LHR
Nonstop7h 15mLufthansa
Sat 11/112:05 p.m.LHR - IAD
Nonstop8h 35mLufthansa
Deal found 22/12C$ 1,907
Sat 28/122:20 p.m.IAD - LHR
1 stop19h 15mAvianca
Mon 30/129:40 p.m.LHR - IAD
1 stop20h 20mAvianca
Deal found 22/12C$ 2,085

Find flights from Dulles Intl to Heathrow within your budget

Customize your flight search to find flights from Dulles Intl to Heathrow 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 629,999 searches. Data last updated 22 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 16/5

10:05 p.m.-9:35 a.m.

2 stops30h 30m

London Heathrow

Mon 19/5

6:40 a.m.-7:59 p.m.

1 stop18h 19m

C$ 787

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 22/1

7:40 p.m.-10:50 a.m.

1 stop10h 10m

London Heathrow

Fri 31/1

12:15 p.m.-6:25 p.m.

1 stop11h 10m

C$ 816

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 3/3

7:15 p.m.-12:40 p.m.

1 stop12h 25m

London Heathrow

Tue 11/3

6:00 a.m.-3:30 p.m.

1 stop13h 30m

C$ 872

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 15/1

6:25 p.m.-6:40 a.m.

Nonstop7h 15m

London Heathrow

Wed 29/1

1:45 p.m.-3:30 p.m.

1 stop30h 45m

C$ 922

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 26/2

9:55 p.m.-10:05 a.m.

Nonstop7h 10m

London Heathrow

Tue 11/3

4:30 p.m.-8:45 p.m.

Nonstop8h 15m

C$ 934

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 30/4

6:10 p.m.-6:45 a.m.

Nonstop7h 35m

London Heathrow

Thu 15/5

12:45 p.m.-4:15 p.m.

Nonstop8h 30m

C$ 951

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 2/2

5:36 p.m.-2:05 p.m.

2 stops39h 29m

London Heathrow

Tue 25/2

2:50 p.m.-4:16 p.m.

2 stops54h 26m

C$ 983

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 6/5

8:45 p.m.-1:00 p.m.

1 stop11h 15m

London Heathrow

Wed 21/5

9:30 a.m.-3:50 p.m.

1 stop11h 20m

C$ 1,019

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 21/2

6:00 p.m.-6:15 a.m.

Nonstop7h 15m

London Heathrow

Thu 6/3

4:30 p.m.-7:45 p.m.

Nonstop8h 15m

C$ 1,020

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 25/2

5:50 p.m.-9:45 a.m.

1 stop10h 55m

London Heathrow

Sun 9/3

8:30 a.m.-4:50 p.m.

1 stop12h 20m

C$ 1,030

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/12

Showing 1-10 of 22 results
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Best time to book a flight from Dulles Intl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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.

Travel insights for flights from Dulles Intl to Heathrow

Get recent, data-driven insights about flights from Dulles Intl to Heathrow 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 Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Heathrow. Price data was last updated on 20 December 2024.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 89 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of C$ 560). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in July is currently the most expensive (average of C$ 874). 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 LHR?

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

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport at noon. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight in the morning.

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

Explore weekly flight availability from Dulles Intl to Heathrow. 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 December 2024.

The most flights from IAD to LHR are scheduled on a Saturday (27 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (23 on average).

Rainfall in Heathrow by month

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

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

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 22 December 2024.
Peruse reviews from past customers who have flown with Scandinavian Airlines, Delta and Icelandair from Washington, D.C. to London to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,594 reviews
Check prices

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

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

Delta
8.0
Very good
8,594 reviews
Delta
8.0
Very good
8,594 reviews
Check prices

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

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

Finnair
7.7
Good
1,283 reviews
Delta
8.0
Very good
8,594 reviews
Check prices

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

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

Austrian Airlines
7.6
Good
785 reviews
Delta
8.0
Very good
8,594 reviews
Check prices

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

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

SWISS
7.6
Good
1,605 reviews
Delta
8.0
Very good
8,594 reviews
Check prices

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

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

Virgin Atlantic
7.5
Good
667 reviews
Delta
8.0
Very good
8,594 reviews
Check prices

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

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 Heathrow. 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 Heathrow Airport round-trip?

    According to our current data, Icelandair (C$ 777), Scandinavian Airlines (C$ 787), and TAP AIR PORTUGAL (C$ 872) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. You may be able to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport for 31% less than the average price by searching for these airlines.

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

    C$ 387 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on TAP AIR PORTUGAL and Delta, with prices starting from C$ 471 and C$ 580, respectively.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport consider choosing Virgin Atlantic (86%), Singapore Airlines (86%) or Air France (84%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport is generally C$ 892, our data shows the cheapest flight currently is C$ 490. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay C$ 2,293 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Heathrow 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 Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of C$ 560). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in July is currently the most expensive (average of C$ 874). 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.

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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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