Which airlines fly to Seattle?

Based on our data, the most popular airlines that fly to Seattle from United Kingdom are Virgin Atlantic, British Airways, Icelandair and KLM. There may also be other airline options depending on where in United Kingdom you’re flying from.

Delta Flights to Seattle

Delta is a popular choice for users travelling to Seattle. It operates 36 flights every week to Seattle, most often flying from Boise Air Term. Gowen Fld. Delta ticket prices will depend on when and where you need to fly from - deals as low as £448 (from Birmingham) have been found by momondo users. In 7,995 reviews, momondo users have rated Delta at an average score of 7.9/10.

KLM Flights to Seattle

KLM (7.7/10, 1,406 reviews) is also a popular choice for flights to Seattle, with deals from as low as £407 from Birmingham, round-trip. With 16 KLM flights to Seattle on average each week, prices can vary significantly by origin and availability.

How long does it take to fly to Seattle?

The average flight duration from United Kingdom to Seattle depends on which airport you fly into and out of. Flying from London Heathrow to Seattle/Tacoma Intl is 9h 55m on average, while flying from Manchester to Seattle/Tacoma Intl is 13h 05m on average. Seattle/Tacoma Intl is the most popular airport in Seattle.

£294 Cheap Flights to Seattle in 2025/26

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Find the cheapest flights from the United Kingdom to Seattle

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Cheap return flights

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11:55 - 17:00LGW-SEA

13h 05m1 stop

14:35 - 10:55SEA-LGW

12h 20m1 stop

£446Icelandair

Find Deal

Tue, 25 Nov - Tue, 2 Dec

20:35 - 17:00LHR-SEA

28h 25m1 stop

14:35 - 19:30SEA-LHR

20h 55m1 stop

£447Icelandair

Find Deal

Mon, 17 Nov - Thu, 11 Dec

11:45 - 22:25LHR-SEA

42h 40m2 stops

07:20 - 06:50SEA-LHR

15h 30m1 stop

£473Virgin Atlantic

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Fri, 6 Feb - Sun, 15 Feb

12:20 - 14:58LHR-SEA

10h 38mdirect

10:15 - 11:40SEA-LHR

17h 25m1 stop

£476Virgin Atlantic

Find Deal

Wed, 24 Dec - Wed, 31 Dec

09:10 - 23:08LCY-SEA

20h 58m2 stops

13:48 - 14:05SEA-LCY

41h 17m2 stops

£593British Airways

Find Deal

Tue, 10 Mar - Tue, 17 Mar

09:10 - 23:08LCY-SEA

20h 58m2 stops

13:48 - 14:05SEA-LCY

41h 17m2 stops

£596British Airways

Find Deal

Tue, 10 Mar - Tue, 17 Mar

18:15 - 12:10LCY-SEA

25h 55m1 stop

14:00 - 17:40SEA-LCY

19h 40m1 stop

£603Lufthansa

Find Deal

Mon, 8 Dec - Mon, 29 Dec

06:00 - 15:01EDI-SEA

17h 01m2 stops

07:00 - 23:15SEA-EDI

33h 15m2 stops

£607Lufthansa

Find Deal

Wed, 4 Mar - Wed, 18 Mar

08:20 - 18:20EDI-SEA

18h 00m1 stop

20:05 - 19:50SEA-EDI

15h 45m1 stop

£608Aer Lingus

Find Deal

Mon, 8 Dec - Sun, 14 Dec

08:05 - 18:20MAN-SEA

18h 15m1 stop

20:05 - 20:10SEA-MAN

16h 05m1 stop

£632Aer Lingus

Find Deal

Mon, 22 Dec - Mon, 29 Dec

Fly from

Route

Depart

Return

Price

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 25/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Tue 2/12

14:35-10:55

1 stop12h 20m

£446

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 17/11

20:35-17:00

1 stop28h 25m

Seattle/Tacoma Intl

Thu 11/12

14:35-19:30

1 stop20h 55m

£447

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 6/2

11:45-22:25

2 stops42h 40m

Seattle/Tacoma Intl

Sun 15/2

07:20-06:50

1 stop15h 30m

£473

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 24/12

12:20-14:58

Nonstop10h 38m

Seattle/Tacoma Intl

Wed 31/12

10:15-11:40

1 stop17h 25m

£476

LondonSeattle

LCY - SEA

LCYSEA

London City

Tue 10/3

09:10-23:08

2 stops20h 58m

Seattle/Tacoma Intl

Tue 17/3

13:48-14:05

2 stops41h 17m

£593

LondonSeattle

LCY - SEA

LCYSEA

London City

Tue 10/3

09:10-23:08

2 stops20h 58m

Seattle/Tacoma Intl

Tue 17/3

13:48-14:05

2 stops41h 17m

£596

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 8/12

18:15-12:10

1 stop25h 55m

Seattle/Tacoma Intl

Mon 29/12

14:00-17:40

1 stop19h 40m

£603

EdinburghSeattle

EDI - SEA

EDISEA

Edinburgh Turnhouse

Wed 4/3

06:00-15:01

2 stops17h 01m

Seattle/Tacoma Intl

Wed 18/3

07:00-23:15

2 stops33h 15m

£607

EdinburghSeattle

EDI - SEA

EDISEA

Edinburgh Turnhouse

Mon 8/12

08:20-18:20

1 stop18h 00m

Seattle/Tacoma Intl

Sun 14/12

20:05-19:50

1 stop15h 45m

£608

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Mon 22/12

08:05-18:20

1 stop18h 15m

Seattle/Tacoma Intl

Mon 29/12

20:05-20:10

1 stop16h 05m

£632

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

Seattle flights insights and trends

Explore insights for your Seattle flight to craft the best travel plan

Prices

Other information

What is the cheapest month to fly to Seattle?

The cheapest month to fly to Seattle from United Kingdom is in January. Flight prices, which tend to average around £475, are often lower during this time because this is during the off-season. The month of February is another great option to travel to Seattle, with average flight prices from United Kingdom averaging around £497.

What is the absolute cheapest flight to Seattle?

In the past two weeks, users have booked deals to Seattle for £114/person, which is 3% cheaper than the average flight to Seattle. To find the cheapest price to Seattle from your area, use momondo’s Airport-to-Airport Pricing Tool.

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What is the cheapest day to depart on your flight to Seattle?

According to our data, Wednesday is the cheapest day to fly to Seattle from United Kingdom. The lowest ticket price found for a Wednesday departure recently was £596. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Sunday is £686.

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

According to our data, the cheapest time of day to fly to Seattle is in the evening. momondo users have found flights departing from United Kingdom to Seattle in the evening for as low as £529. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive, with an average ticket price of £637.

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around £582 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from United Kingdom for as low as £545 on momondo.

Cheapest flights to Seattle/Tacoma Intl

Find the cheapest flights to Seattle/Tacoma Intl from your nearest city or airport

Find flights from London Heathrow Airport to Seattle

CHEAPEST MONTH TO FLY TO SEATTLE FROM LONDON HEATHROW AIRPORT	February	17% cheaper	Flying from London Heathrow Airport to Seattle costs on average just £486 in February
MOST EXPENSIVE MONTH TO FLY TO SEATTLE FROM LONDON HEATHROW AIRPORT	December	25% more expensive	It costs about £727 for flights to Seattle from London Heathrow Airport in December
MOST POPULAR MONTH TO FLY TO SEATTLE FROM LONDON HEATHROW AIRPORT	August	224% more users visited	More momondo users searched in flights to Seattle from London Heathrow Airport in August than any other month

Cheap Seattle flight deals and tips

Summary info about Seattle flight prices, duration and airlines

Best One-Way Price	£294
Best Round-Trip Price	£446
Fastest flight time	10h 00m
Popular in	August

The best one-way flight price to Seattle from United Kingdom in the last 72 hours is £294 (Edinburgh Turnhouse to Seattle/Tacoma Intl).

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The best round-trip flight price to Seattle from United Kingdom in the last 72 hours is £446 (London Gatwick to Seattle/Tacoma Intl).

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The fastest flight to Seattle from United Kingdom takes 10h 00m (London Heathrow to Seattle/Tacoma Intl).

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August has the highest demand for flights to Seattle, with a 13% price increase on average.

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Frequently asked questions about flying to Seattle

What is there to do in Seattle when it’s raining?

If you are planning a flight to Seattle and are looking to avoid the rain, you should avoid traveling during the months of January, November, and December. These months will typically see 5.1 inches or more of rain, meaning that rain is likely. If you do run into rain while in Seattle, there are still things to do and ways to enjoy your trip. While in Seattle you will find Bill and Melinda Gates Foundation Visitor Center nearby which is a great museum to visit when you’re looking for things to do indoors. For those looking to get out of the rain and do a little shopping, check out Seattle Waterfront.

When is it best to fly to Seattle to go sightseeing?

The city of Seattle has many sights to see while visiting. Many tourists find it ideal to go sightseeing when the weather is warmer, but not blistering. Consider booking your flight to Seattle for October, when temperatures are a bit higher and the chance of rain is relatively low. Many travellers find it worthwhile to visit Space Needle, Seattle Center, and Seattle Waterfront.

How far in advance should I book a flight to Seattle?

In general, most travellers find the cheapest time to book a flight to Seattle is about 90 days prior to their departure date, when tickets on average are £555. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from United Kingdom for as low as £506 on momondo.

Is there an alternative airport near Seattle?

Those flying to Seattle could potentially find better pricing at Seattle Lake Union Spb Airport (1 mi from Seattle city centre), Seattle King County/Boeing Airport (6 mi from Seattle city centre), Kenmore Air Harbor Airport (9 mi from Seattle city centre), Everett Paine Field Airport (21 mi from Seattle city centre) or Lopez Island Airport (66 mi from Seattle city centre) depending on the month and departure airport.

Is there a cheaper alternative to flying into Seattle?

With an average price of £117 per person, Seattle Lake Union Spb Airport is the cheapest airport to fly into when planning your trip to Seattle. This price can fluctuate based on where you are flying from. momondo’s Airport-to-Airport Pricing Tool can help users find the best prices.

When did momondo last update prices for flights to Seattle/Tacoma Intl Airport?

Prices for flights to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights to Seattle/Tacoma Intl Airport?

As of October 2025, there are 19 operators available to choose from for flights to Seattle/Tacoma Intl Airport.

How old do you have to be to fly to Seattle/Tacoma Intl Airport?

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 to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Fife

Renton

SeaTac

Why use momondo?

Why should I use momondo to find a flight deal to Seattle?

It is quick and easy to find flights to Seattle on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.

Can I find flights to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for flights to Seattle to just show those with flexible booking policies.

How can momondo help me find flights to Seattle?

Once all potential Seattle flight options are in front of you momondo lets you sort and filter flights based on preferences such as airline, price and flight times, amongst many other options.

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

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