What is the cheapest airline that flies from London Heathrow to Washington?

SWISS, United Airlines, and JetBlue are the most popular carriers operating from London Heathrow to Washington

What airlines fly to State of Washington?

British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to State of Washington from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 40% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 5 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

How many operators does momondo search for flights from London Heathrow Airport to Washington?

As of May 2026, there are 5 operators available to choose from for flights from London Heathrow Airport to Washington.

How old do you have to be to fly from London Heathrow Airport to Washington?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington.

What documentation or ID do you need to fly to Washington?

The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$450 Cheap Flights from London Heathrow Airport to State of Washington in 2026

Q: How many flights depart from London Heathrow Airport to State of Washington on average per week?

The number of flights available between London Heathrow Airport and State of Washington is 196 per week as of May 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

Q: How many flights depart from London Heathrow Airport to State of Washington on average per day?

As of May 2026, 28 flights take off from London Heathrow Airport and land in State of Washington each day. The most common flight departure time for this route is 9:00AM, with 50% of daily flights taking off in the afternoon.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from London Heathrow Airport to Washington

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:05 pm - 8:40 pm

LHR

SEA

15h 35m

1 stop

11:25 pm - 11:55 am

SEA

LHR

28h 30m

1 stop

$706Icelandair

Wed, Jun 3 - Wed, Jun 10

9:25 pm - 8:40 pm

LHR

SEA

31h 15m

1 stop

3:35 pm - 10:50 am

SEA

LHR

12h 15m

1 stop

$709Icelandair

Wed, Oct 14 - Thu, Oct 29

9:25 pm - 11:45 am

LHR

SEA

22h 20m

1 stop

11:25 pm - 8:20 pm

SEA

LHR

12h 55m

1 stop

$710Icelandair

Thu, May 28 - Sat, Jun 6

9:25 pm - 11:45 am

LHR

SEA

22h 20m

1 stop

11:25 pm - 11:55 am

SEA

LHR

28h 30m

1 stop

$711Icelandair

Wed, Jun 17 - Fri, Jul 17

9:50 am - 11:35 am

LHR

SEA

9h 45mnonstop

1:30 pm - 6:45 am

SEA

LHR

9h 15mnonstop

$716British Airways

Wed, Jul 1 - Mon, Jul 13

2:45 pm - 1:17 pm

LHR

BLI

30h 32m

1 stop

7:37 pm - 12:20 pm

BLI

LHR

32h 43m

1 stop

$788Alaska Airlines

Wed, Nov 11 - Sun, Nov 15

5:00 pm - 1:09 pm

LHR

BLI

28h 09m

1 stop

1:49 pm - 3:05 pm

BLI

LHR

17h 16m

1 stop

$987Alaska Airlines

Mon, Jun 22 - Wed, Jul 8

6:30 am - 7:42 pm

LHR

PSC

21h 12m

2 stops

12:30 pm - 3:35 pm

PSC

LHR

19h 05m

1 stop

$1,172Delta

Mon, Jun 29 - Mon, Jul 6

5:45 pm - 11:59 pm

LHR

PSC

14h 14m

1 stop

3:25 pm - 3:35 pm

PSC

LHR

16h 10m

1 stop

$1,190Delta

Mon, Jun 29 - Mon, Jul 6

9:40 am - 7:42 pm

LHR

PSC

18h 02m

2 stops

3:25 pm - 4:35 pm

PSC

LHR

17h 10m

2 stops

$1,209Virgin Atlantic

Mon, Jun 29 - Mon, Jul 6

Icelandair flights from London Heathrow Airport to State of Washington

Our best Icelandair deals on London Heathrow Airport to State of Washington flight tickets

Icelandair

Oct 14

LHR9:25 pmLondon Heathrow

31h 15m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

Oct 29

SEA3:35 pmSeattle/Tacoma Intl

12h 15m

1 stop

LHR10:50 amLondon Heathrow

$709

Icelandair

May 28

LHR9:25 pmLondon Heathrow

22h 20m

1 stop

SEA11:45 amSeattle/Tacoma Intl

Jun 6

SEA11:25 pmSeattle/Tacoma Intl

12h 55m

1 stop

LHR8:20 pmLondon Heathrow

$710

Icelandair

Jun 17

LHR9:25 pmLondon Heathrow

22h 20m

1 stop

SEA11:45 amSeattle/Tacoma Intl

Jul 17

SEA11:25 pmSeattle/Tacoma Intl

28h 30m

1 stop

LHR11:55 amLondon Heathrow

$711

Delta flights from London Heathrow Airport to State of Washington

Our best Delta deals on London Heathrow Airport to State of Washington flight tickets

Delta

Nov 10

LHR6:30 amLondon Heathrow

13h 17m

1 stop

SEA11:47 amSeattle/Tacoma Intl

Nov 17

SEA11:15 amSeattle/Tacoma Intl

15h 00m

1 stop

LHR10:15 amLondon Heathrow

$747

Delta

Jul 1

LHR5:45 pmLondon Heathrow

14h 10m

1 stop

GEG11:55 pmSpokane

Jul 15

GEG12:50 pmSpokane

16h 25m

1 stop

LHR1:15 pmLondon Heathrow

$1,177

Delta

Jun 29

LHR5:45 pmLondon Heathrow

14h 14m

1 stop

PSC11:59 pmPasco Tri Cities

Jul 6

PSC3:25 pmPasco Tri Cities

16h 10m

1 stop

LHR3:35 pmLondon Heathrow

$1,190

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 6/3

1:05 pm-8:40 pm

1 stop15h 35m

Seattle/Tacoma Intl

Wed 6/10

11:25 pm-11:55 am

1 stop28h 30m

$706

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 10/14

9:25 pm-8:40 pm

1 stop31h 15m

Seattle/Tacoma Intl

Thu 10/29

3:35 pm-10:50 am

1 stop12h 15m

$709

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 5/28

9:25 pm-11:45 am

1 stop22h 20m

Seattle/Tacoma Intl

Sat 6/6

11:25 pm-8:20 pm

1 stop12h 55m

$710

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 6/17

9:25 pm-11:45 am

1 stop22h 20m

Seattle/Tacoma Intl

Fri 7/17

11:25 pm-11:55 am

1 stop28h 30m

$711

Quickest round-trip

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 7/1

9:50 am-11:35 am

Nonstop9h 45m

Seattle/Tacoma Intl

Mon 7/13

1:30 pm-6:45 am

Nonstop9h 15m

$716

LondonBellingham

LHR - BLI

LHRBLI

London Heathrow

Wed 11/11

2:45 pm-1:17 pm

1 stop30h 32m

Bellingham

Sun 11/15

7:37 pm-12:20 pm

1 stop32h 43m

$788

LondonBellingham

LHR - BLI

LHRBLI

London Heathrow

Mon 6/22

5:00 pm-1:09 pm

1 stop28h 09m

Bellingham

Wed 7/8

1:49 pm-3:05 pm

1 stop17h 16m

$987

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Mon 6/29

6:30 am-7:42 pm

2 stops21h 12m

Pasco Tri Cities

Mon 7/6

12:30 pm-3:35 pm

1 stop19h 05m

$1,172

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Mon 6/29

5:45 pm-11:59 pm

1 stop14h 14m

Pasco Tri Cities

Mon 7/6

3:25 pm-3:35 pm

1 stop16h 10m

$1,190

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Mon 6/29

9:40 am-7:42 pm

2 stops18h 02m

Pasco Tri Cities

Mon 7/6

3:25 pm-4:35 pm

2 stops17h 10m

$1,209

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London Heathrow Airport to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to State of Washington?

The month of February is, on average, the cheapest month to fly to State of Washington from London Heathrow Airport, with most prices found around $403. If you aren’t able to travel to State of Washington during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $431.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from London Heathrow Airport to State of Washington is on a Monday. Travelers who choose to depart for State of Washington on a Monday will often find tickets for as low as $841. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to State of Washington for around $947.

What is the cheapest time of day to depart on your flight to State of Washington?

The cheapest time of day to fly to State of Washington is at noon when flights can be purchased for as low as $855. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $905 on average. Flights to State of Washington from London Heathrow Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest London Heathrow to Washington flight route?

Fly from London Heathrow to Seattle/Tacoma Intl for the best London Heathrow - Washington flight prices

How far in advance should I book a flight from London Heathrow Airport to Washington?

You are more likely to see cheaper flights to State of Washington from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $782 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from London Heathrow Airport for as low as $703 on momondo.

Can stopping save me money on London Heathrow Airport to State of Washington flights?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to State of Washington.

Cheap London Heathrow Airport to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to State of Washington

Best Price Found	$717
Fastest flight time	9h 45m
Direct flights	Every day
Airports in State of Washington	96 airports

The best one-way flight to State of Washington from London Heathrow Airport in the past 72 hours is $717. The best round-trip flight deal from London Heathrow Airport to State of Washington found on momondo in the last 72 hours is $881.

The fastest flight from London Heathrow Airport to State of Washington takes 9h 45m

Direct flights go from London Heathrow Airport to State of Washington every day.

There are 96 airports in State of Washington. From London Heathrow Airport there are direct flights to Seattle/Tacoma Intl (SEA).

Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Washington

When did momondo last update prices for flights from London Heathrow Airport to Washington?
Prices for flights from London Heathrow Airport to Washington refresh daily.
How many operators does momondo search for flights from London Heathrow Airport to Washington?
As of May 2026, there are 5 operators available to choose from for flights from London Heathrow Airport to Washington.
How old do you have to be to fly from London Heathrow Airport to Washington?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington.
What documentation or ID do you need to fly to Washington?
The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London Heathrow Airport to State of Washington?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to State of Washington is Airbus A330-900neo, representing 21.97% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 21.04%, Boeing 787-9 Dreamliner at 20.03%, and Boeing 777-300ER at 14.90%.

Best airlines flying from London Heathrow Airport to State of Washington

Compare and see reviews for airlines that fly from London Heathrow Airport to State of Washington with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $403	Free Cancellation	Rating 7.0 656 reviews	Search Icelandair flights
Virgin Atlantic	PriceFrom $574	Free Cancellation	Rating 7.4 688 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $600	Free Cancellation	Rating 7.9 8,447 reviews	Search Delta flights
American Airlines	PriceFrom $618	Free Cancellation	Rating 7.1 11,650 reviews	Search American Airlines flights
British Airways	PriceFrom $671	Free Cancellation	Rating 6.7 7,987 reviews	Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Washington for you.

Can I find flights from London to Washington with flexible booking policies on momondo?

Flights from London to Washington with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Washington?

momondo provides multiple filters to help you find the best flight to Washington from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from London to Washington right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Washington now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington and let you know when they change.

An easier way to manage your State of Washington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Wed 6/17

Wed 6/24

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington

Popular cities

Other flights from London Heathrow Airport

Other flights to Washington

Airlines

Complete your trip

Feeling lucky

Popular cities in Washington

Flights to New Yorkfrom $83

Flights to Los Angelesfrom $47

Flights to Orlandofrom $53

Flights to Miamifrom $55

Flights to Chicagofrom $60

Flights to San Franciscofrom $54

Flights to Las Vegasfrom $48

Flights to Washington, D.C.from $56

Flights to Bostonfrom $74

Flights to Atlantafrom $54

Flights to Fort Lauderdalefrom $55

Flights to Dallasfrom $88

Cheap flights from London Heathrow Airport to Washington from $450

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London Heathrow Airport to Washington

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Icelandair flights from London Heathrow Airport to State of Washington

Our best Icelandair deals on London Heathrow Airport to State of Washington flight tickets

Delta flights from London Heathrow Airport to State of Washington

Our best Delta deals on London Heathrow Airport to State of Washington flight tickets

momondo Fare Finder

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

See travel insights to Washington from

How to get the cheapest flight ticket from London Heathrow Airport to State of Washington

What is the cheapest month to fly to State of Washington?

What is the cheapest day to depart on your flight to State of Washington?

What is the cheapest time of day to depart on your flight to State of Washington?

What is the cheapest London Heathrow to Washington flight route?

How far in advance should I book a flight from London Heathrow Airport to Washington?

Can stopping save me money on London Heathrow Airport to State of Washington flights?

What is the cheapest airline that flies from London Heathrow to Washington?

What airlines fly to State of Washington?

How many flights depart from London Heathrow Airport to State of Washington on average per day?

How many flights depart from London Heathrow Airport to State of Washington on average per week?

Cheap London Heathrow Airport to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to State of Washington

Best Price Found

Fastest flight time

Direct flights

Airports in State of Washington

Frequently asked questions about flying from London Heathrow Airport to Washington

Best airlines flying from London Heathrow Airport to State of Washington

Compare and see reviews for airlines that fly from London Heathrow Airport to State of Washington with momondo

Why use momondo?

An easier way to manage your State of Washington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Washington

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo

London Heathrow Airport flight routes

According to popular flight searches on momondo this year

State of Washington flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Washington

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Washington

Explore popular destinations other users love

According to popular flight searches on momondo this year