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Cheap flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport from C$ 303

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 20/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
26 Nov — 3 Dec1
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 21 November 2024.

Round-trip from

C$ 768

One-way from

C$ 303

Popular in

June

Cheapest in

September
Scandinavian Airlines
  • Scandinavian Airlines
  • 12/4-14/4
  • 3 total stops
  • 27h 19m total
  • Washington, D.C. to London
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Icelandair
  • Icelandair
  • 20/1
  • 1 total stop
  • 10h 10m total
  • Washington, D.C. to London
Search Deals
High demand for flights, 29% potential price rise
Search Deals
Best time to find cheap flights, 14% potential price drop
Search Deals

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 21 November 2024.

Sun 8/125:10 p.m.IAD - LHR
1 stop11h 10mScandinavian Airlines
Sun 12/17:30 p.m.LHR - IAD
1 stop25h 10mScandinavian Airlines
Deal found 21/11C$ 788
Fri 6/1210:30 p.m.IAD - LHR
Nonstop7h 35mUnited Airlines
Sun 8/127:00 a.m.LHR - IAD
1 stop12h 55mUnited Airlines
Deal found 21/11C$ 849
Wed 11/126:45 p.m.IAD - LHR
Nonstop7h 30mDelta
Wed 18/1212:25 p.m.LHR - IAD
Nonstop8h 40mDelta
Deal found 21/11C$ 876
Sun 8/128:45 p.m.IAD - LHR
1 stop16h 05mSWISS
Tue 17/128:55 a.m.LHR - IAD
1 stop12h 30mSWISS
Deal found 21/11C$ 880
Tue 10/1212:45 p.m.IAD - LHR
1 stop12h 35mVirgin Atlantic
Wed 18/1212:20 p.m.LHR - IAD
1 stop16h 05mVirgin Atlantic
Deal found 21/11C$ 897
Tue 31/129:55 p.m.IAD - LHR
Nonstop7h 10mBritish Airways
Thu 9/112:10 p.m.LHR - IAD
Nonstop8h 25mBritish Airways
Deal found 21/11C$ 940
Sun 8/128:45 p.m.IAD - LHR
1 stop11h 15mMultiple Airlines
Sun 12/18:30 a.m.LHR - IAD
1 stop12h 20mMultiple Airlines
Deal found 20/11C$ 955
Sat 7/123:35 p.m.IAD - LHR
1 stop11h 20mKLM
Thu 19/1210:10 a.m.LHR - IAD
1 stop12h 25mKLM
Deal found 21/11C$ 966
Tue 3/125:30 p.m.IAD - LHR
1 stop14h 10mTAP AIR PORTUGAL
Tue 10/126:00 a.m.LHR - IAD
1 stop13h 30mTAP AIR PORTUGAL
Deal found 21/11C$ 994
Mon 30/129:20 p.m.IAD - LHR
Nonstop7h 10mAir France
Tue 7/14:35 p.m.LHR - IAD
1 stop31h 20mAir France
Deal found 21/11C$ 1,040

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 640,016 searches. Data last updated 21 November 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

Sat 12/4

10:05 p.m.-4:00 p.m.

1 stop12h 55m

London Heathrow

Mon 14/4

10:35 a.m.-7:59 p.m.

2 stops14h 24m

C$ 768

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 1/3

7:40 p.m.-7:30 p.m.

1 stop18h 50m

London Heathrow

Tue 11/3

12:15 p.m.-7:25 p.m.

1 stop11h 10m

C$ 781

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 8/1

10:30 p.m.-5:30 p.m.

1 stop14h 00m

London Heathrow

Tue 21/1

6:00 a.m.-2:30 p.m.

1 stop13h 30m

C$ 850

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 10/12

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

Nonstop7h 15m

London Heathrow

Tue 17/12

8:55 a.m.-4:25 p.m.

1 stop12h 30m

C$ 853

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 11/12

6:45 p.m.-7:15 a.m.

Nonstop7h 30m

London Heathrow

Wed 18/12

12:25 p.m.-4:05 p.m.

Nonstop8h 40m

C$ 876

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 8/12

8:45 p.m.-5:50 p.m.

1 stop16h 05m

London Heathrow

Tue 17/12

8:55 a.m.-4:25 p.m.

1 stop12h 30m

C$ 880

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 21/1

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

Nonstop7h 10m

London Heathrow

Wed 29/1

12:10 p.m.-3:35 p.m.

Nonstop8h 25m

C$ 881

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 9/3

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

Nonstop7h 10m

London Heathrow

Fri 21/3

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

Nonstop8h 15m

C$ 895

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 10/12

12:45 p.m.-6:20 a.m.

1 stop12h 35m

London Heathrow

Wed 18/12

12:20 p.m.-11:25 p.m.

1 stop16h 05m

C$ 897

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 12/3

6:50 p.m.-9:45 a.m.

1 stop10h 55m

London Heathrow

Wed 19/3

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

1 stop12h 20m

C$ 905

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/11

Showing 1-10 of 27 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 15 November 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$ 877). 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 21 November 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 4% 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 21 November 2024.

The most flights from IAD to LHR 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 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 21 November 2024.
Peruse reviews from past customers who have flown with United Airlines, SWISS and Austrian Airlines 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
8,755 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

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
8,755 reviews
Delta
8.0
Very good
8,755 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 10

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

Finnair
7.7
Good
1,300 reviews
Delta
8.0
Very good
8,755 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

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
804 reviews
Delta
8.0
Very good
8,755 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 10

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

SWISS
7.6
Good
1,636 reviews
Delta
8.0
Very good
8,755 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

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
663 reviews
Delta
8.0
Very good
8,755 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

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 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, Scandinavian Airlines (C$ 768), Icelandair (C$ 781), and TAP AIR PORTUGAL (C$ 850) 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 29% 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$ 303 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 Virgin Atlantic, with prices starting from C$ 459 and C$ 550, 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 Air France (82%), Virgin Atlantic (76%) or Singapore Airlines (76%) 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$ 885, our data shows the cheapest flight currently is C$ 377. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay C$ 1,607 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$ 877). 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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