How long is the flight from State of Washington to London Heathrow Airport?

Airlines like Delta, United Airlines, and Scandinavian Airlines fly from State of Washington to London Heathrow Airport in about 16h 05m. The time it takes to get you to your destination can typically vary by up to 18h 50m. State of Washington and London Heathrow Airport are separated by a distance of 4643 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 40.0 mm.

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).

What are the most popular routes from State of Washington to London Heathrow Airport?

When deciding which route to take from State of Washington to London Heathrow Airport consider Seattle/Tacoma Intl - London Heathrow, Portland - London Heathrow or Spokane - London Heathrow as they are the most popular.

What are the cheapest flights from State of Washington to London Heathrow Airport?

The cheapest flight price from State of Washington to London Heathrow Airport is £239. On average you can expect to pay £805. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for £358.

What are the most reliable airlines from State of Washington to London Heathrow Airport?

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 State of Washington to London Heathrow Airport on time: Scandinavian Airlines (95%), KLM (94%), SAUDIA (94%).

Can I find deals for flights from Washington to Heathrow that include hotel bookings?

Yes. In addition to deals on Washington to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Washington to Heathrow?

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

Can I find deals for business class flights from Washington to Heathrow?

Yes. Cheapflights offers flight deals from Washington 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.

£243+ Cheap Flights from Washington to London Heathrow Airport

Cheap flight deals from Washington to Heathrow

Enter your travel dates to find the best prices.

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Best

Direct

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One-way

Cheapest flights from Washington to Heathrow
Explore the most affordable flight options available from Washington to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 September 2026.

Wed 18/1116:25 -

1 stop16h 05m

Wed 25/1108:40 -

2 stops19h 29m

Deal found 24/9£564

Sun 1/1108:40 -

2 stops16h 40m

Tue 17/1120:35 -

1 stop28h 25m

Deal found 28/9£581

Sun 29/1114:35 -

1 stop12h 15m

Mon 7/1212:15 -

1 stop12h 45m

Deal found 24/9£582

Thu 26/1114:35 -

1 stop20h 55m

Tue 1/1212:15 -

1 stop12h 45m

Deal found 25/9£583

Wed 28/1015:15 -

1 stop13h 35m

Fri 30/1007:40 -

1 stop13h 20m

Deal found 28/9£584

Thu 5/1107:45 -

3 stops24h 40m

Tue 10/1118:40 -

2 stops26h 20m

Deal found 26/9£584

Tue 8/1214:35 -

1 stop12h 15m

Mon 28/1212:15 -

1 stop12h 45m

Deal found 24/9£585

Wed 25/1114:35 -

1 stop20h 55m

Tue 1/1212:15 -

1 stop12h 45m

Deal found 25/9£586

Fri 9/1015:40 -

2 stops18h 50m

Tue 20/1006:40 -

2 stops22h 00m

Deal found 23/9£587

Wed 16/1214:35 -

1 stop12h 15m

Tue 22/1212:15 -

1 stop12h 45m

Deal found 28/9£588

Tue 10/1114:35 -

1 stop12h 15m

Fri 13/1107:40 -

1 stop13h 20m

Deal found 27/9£589

Fri 16/1009:30 -

1 stop17h 50m

Fri 23/1006:30 -

2 stops19h 59m

Deal found 24/9£602

Best flights from Washington to Heathrow
Discover carefully curated flight deals from Washington to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 September 2026.

Tue 2/312:30 -

1 stop34h 55m

Fri 5/306:35 -

2 stops25h 03m

Deal found 25/9£569

Thu 19/1107:00 -

1 stop20h 35m

Wed 25/1112:20 -

1 stop14h 37m

Deal found 24/9£607

Thu 11/312:00 -

2 stops22h 30m

Thu 18/318:40 -

2 stops34h 22m

Deal found 27/9£636

Tue 2/315:15 -

1 stop13h 05m

Fri 5/314:45 -

1 stop17h 11m

Deal found 23/9£641

Mon 1/216:55 -

Nonstop9h 45m

Fri 5/206:30 -

1 stop13h 17m

Deal found 28/9£649

Sun 14/315:46 -

1 stop13h 24m

Fri 2/409:50 -

1 stop22h 24m

Deal found 24/9£689

Tue 13/1015:14 -

1 stop13h 01m

Sat 24/1009:50 -

Nonstop9h 45m

Deal found 28/9£1,004

Mon 14/1218:45 -

Nonstop9h 25m

Sun 27/1214:45 -

1 stop37h 37m

Deal found 27/9£1,124

Fri 23/1013:00 -

1 stop14h 20m

Fri 30/1010:50 -

2 stops19h 54m

Deal found 24/9£610

Wed 3/211:45 -

2 stops22h 45m

Wed 10/206:40 -

2 stops23h 24m

Deal found 27/9£636

Tue 10/1111:00 -

2 stops15h 45m

Tue 17/1106:30 -

2 stops16h 16m

Deal found 26/9£682

Tue 27/1005:00 -

1 stop21h 40m

Tue 3/1106:35 -

2 stops20h 06m

Deal found 28/9£682

Sun 10/107:20 -

2 stops24h 40m

Sat 23/106:40 -

2 stops23h 22m

Deal found 24/9£638

Sun 14/312:35 -

1 stop15h 05m

Fri 2/408:40 -

2 stops22h 58m

Deal found 28/9£664

Tue 2/305:20 -

2 stops17h 20m

Fri 5/313:35 -

2 stops30h 40m

Deal found 25/9£689

Tue 13/1007:24 -

2 stops24h 36m

Wed 4/1110:20 -

2 stops44h 44m

Deal found 25/9£646

Wed 11/1115:13 -

1 stop13h 07m

Wed 18/1114:45 -

1 stop17h 01m

Deal found 27/9£786

Mon 9/1115:13 -

1 stop12h 57m

Mon 16/1114:55 -

1 stop16h 51m

Deal found 25/9£817

Tue 10/1107:05 -

1 stop16h 00m

Tue 17/1108:40 -

2 stops19h 04m

Deal found 26/9£681

Wed 11/1112:55 -

1 stop12h 45m

Wed 18/1107:30 -

2 stops21h 28m

Deal found 27/9£689

Tue 10/1115:13 -

1 stop13h 07m

Tue 17/1114:45 -

1 stop17h 01m

Deal found 26/9£786

Mon 14/1210:39 -

2 stops23h 01m

Fri 8/118:40 -

2 stops35h 22m

Deal found 28/9£659

Wed 21/1017:30 -

Nonstop9h 50m

Sun 25/1012:20 -

Nonstop10h 34m

Deal found 24/9£815

Wed 11/1112:35 -

1 stop14h 05m

Wed 18/1106:30 -

2 stops21h 14m

Deal found 27/9£681

Wed 28/1013:49 -

1 stop12h 51m

Tue 3/1111:10 -

2 stops39h 31m

Deal found 26/9£689

Thu 12/1115:13 -

1 stop13h 07m

Thu 19/1114:45 -

1 stop17h 01m

Deal found 28/9£824

Tue 27/1009:53 -

1 stop17h 07m

Tue 3/1106:30 -

2 stops20h 15m

Deal found 28/9£681

Wed 23/1207:15 -

2 stops42h 05m

Sat 9/117:00 -

2 stops37h 02m

Deal found 25/9£701

Mon 9/1115:13 -

1 stop13h 07m

Mon 16/1114:45 -

1 stop17h 01m

Deal found 25/9£824

Fri 15/119:20 -

2 stops16h 50m

Fri 22/106:30 -

2 stops16h 15m

Deal found 27/9£701

Find flight deals from Washington to Heathrow

Round-trip from	£564
One-way from	£243
Popular in	June
Cheapest in	January
Average price	£699
Good round-trip deal	£676 or less
Good one-way deal	£293 or less

Delta
18/11-25/11
3 total stops
35h 34m total
Washington to London

Search Deals

Alaska Airlines
29/12-31/12
1 total stop
14h 59m total
Washington to London

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£104 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Price to beat on a round-trip flight from Washington to London Heathrow.

Search Deals

Price to beat on a one-way flight from Washington to London Heathrow.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Wed 30/12

05:00-05:55

2 stops16h 55m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£246

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Mon 28/12

23:42-05:55

1 stop22h 13m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£246

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Tue 29/12

23:42-06:40

2 stops22h 58m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£248

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Sat 13/3

19:44-12:20

1 stop32h 36m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£253

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Sat 13/3

16:00-21:20

2 stops21h 20m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£253

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Sat 13/3

12:30-11:50

2 stops39h 20m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£257

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Mon 28/12

18:55-12:20

Nonstop9h 25m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£270

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Sat 26/12

23:58-10:15

1 stop26h 17m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£281

Fastest return journey

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Mon 26/10

19:45-12:10

Nonstop9h 25m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£282

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Fri 26/3

19:50-12:20

Nonstop9h 30m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£283

Flights are sorted by cheapest return flights first.

Deals found on 28/9

Showing 1-10 of 50 resultsSorted by cheapest first

...

Best time to book a flight from Washington to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Washington with our price prediction graph.

GEG-LHR

SEA-LHR

ALW-LHR

PSC-LHR

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.

Cheapflights Insights

Everything you need to know about your flight from Washington to London Heathrow Airport

USWA-LHR

GEG-LHR

SEA-LHR

ALW-LHR

PSC-LHR

What is the cheapest month to book a flight from State of Washington to London Heathrow Airport?

Currently, February is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of £528). Flying from State of Washington to London Heathrow Airport in June is currently the most expensive (average of £944). 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 WA to LHR?

When flying from State of Washington to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from State of Washington to London Heathrow Airport

The most flights from USWA to LHR are scheduled on a Tuesday (25 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (24 on average).

How much does it cost for a return flight from State of Washington to London Heathrow Airport?

Airfare is typical for this route at the moment.

State of Washington to London Heathrow Airport flights typically cost between £541 and £752 in November.
The cheapest return price found within the last 5 days was £581 on Multiple Airlines (1 Nov–17 Nov).

How far ahead should I book a flight from State of Washington to London Heathrow Airport?

The price you pay for your flight from State of Washington to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 64 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Related info for your journey

How long is the flight from State of Washington to London Heathrow Airport?
Airlines like Delta, United Airlines, and Scandinavian Airlines fly from State of Washington to London Heathrow Airport in about 16h 05m. The time it takes to get you to your destination can typically vary by up to 18h 50m. State of Washington and London Heathrow Airport are separated by a distance of 4643 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the most popular routes from State of Washington to London Heathrow Airport?
When deciding which route to take from State of Washington to London Heathrow Airport consider Seattle/Tacoma Intl - London Heathrow, Portland - London Heathrow or Spokane - London Heathrow as they are the most popular.
What are the most reliable airlines from State of Washington to London Heathrow Airport?
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 State of Washington to London Heathrow Airport on time: Scandinavian Airlines (95%), KLM (94%), SAUDIA (94%).
What are the cheapest flights from State of Washington to London Heathrow Airport?
The cheapest flight price from State of Washington to London Heathrow Airport is £239. On average you can expect to pay £805. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for £358.
Can I find deals for flights from Washington to Heathrow that include hotel bookings?
Yes. In addition to deals on Washington to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Washington to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Heathrow.
Can I find deals for business class flights from Washington to Heathrow?
Yes. Cheapflights offers flight deals from Washington 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 State of Washington to London Heathrow Airport?
Currently, February is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of £528). Flying from State of Washington to London Heathrow Airport in June is currently the most expensive (average of £944). 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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Top 3 airlines flying from Washington to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Alaska Airlines	Cheapest£498	Average£737	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights
British Airways	Cheapest£526	Average£690	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£530	Average£643	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights

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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Washington to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Washington.

Can Cheapflights find flights from Washington to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Washington? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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Cheap flights from Washington to London Heathrow Airport from £243

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Washington to Heathrow

Cheapest flights from Washington to HeathrowExplore the most affordable flight options available from Washington to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 September 2026.

Explore the most affordable flight options available from Washington to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 September 2026.

Best flights from Washington to HeathrowDiscover carefully curated flight deals from Washington to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 September 2026.

Discover carefully curated flight deals from Washington to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 September 2026.

Direct flights from Washington to HeathrowExplore direct flight options from Washington to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 28 September 2026.

Explore direct flight options from Washington to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 28 September 2026.

Last-minute flights from Washington to HeathrowDiscover last-minute flight deals from Washington to Heathrow. Data last updated 28 September 2026 and is based on user searches.

Discover last-minute flight deals from Washington to Heathrow. Data last updated 28 September 2026 and is based on user searches.

One-way flights from Washington to HeathrowSearch for one-way flight options from Washington to Heathrow. Find affordable one-way fares based on user searches. Data last updated 28 September 2026.

Search for one-way flight options from Washington to Heathrow. Find affordable one-way fares based on user searches. Data last updated 28 September 2026.

Find flight deals from Washington to Heathrow

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Popular in

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Use the filters below to find and compare flights from Washington to London Heathrow Airport that are best for you.

Best time to book a flight from Washington to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Washington with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from State of Washington to London Heathrow Airport?

What is the cheapest time of day to fly from WA to LHR?

Find hourly flight availability from Washington 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 28 September 2026.

When flying from State of Washington to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from State of Washington to London Heathrow Airport

The most flights from USWA to LHR are scheduled on a Tuesday (25 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (24 on average).

How much does it cost for a return flight from State of Washington to London Heathrow Airport?

Airfare is typical for this route at the moment.

State of Washington to London Heathrow Airport flights typically cost between £541 and £752 in November.The cheapest return price found within the last 5 days was £581 on Multiple Airlines (1 Nov–17 Nov).

How far ahead should I book a flight from State of Washington to London Heathrow Airport?

The price you pay for your flight from State of Washington to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 64 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Related info for your journey

How long is the flight from State of Washington to London Heathrow Airport?

What are the most popular routes from State of Washington to London Heathrow Airport?

What are the most reliable airlines from State of Washington to London Heathrow Airport?

What are the cheapest flights from State of Washington to London Heathrow Airport?

Can I find deals for flights from Washington to Heathrow that include hotel bookings?

How can I find direct flights from Washington to Heathrow?

Can I find deals for business class flights from Washington to Heathrow?

What is the cheapest month to book a flight from State of Washington to London Heathrow Airport?

Travelling to a place near London Heathrow Airport?

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Alternative routes for Washington to Heathrow

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Complete your trip

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Other flights to Heathrow

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Cheapest flights from Washington to Heathrow
Explore the most affordable flight options available from Washington to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 September 2026.

Best flights from Washington to Heathrow
Discover carefully curated flight deals from Washington to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 September 2026.

Direct flights from Washington to Heathrow
Explore direct flight options from Washington to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 28 September 2026.

Last-minute flights from Washington to Heathrow
Discover last-minute flight deals from Washington to Heathrow. Data last updated 28 September 2026 and is based on user searches.

One-way flights from Washington to Heathrow
Search for one-way flight options from Washington to Heathrow. Find affordable one-way fares based on user searches. Data last updated 28 September 2026.

State of Washington to London Heathrow Airport flights typically cost between £541 and £752 in November.
The cheapest return price found within the last 5 days was £581 on Multiple Airlines (1 Nov–17 Nov).