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Fly from
Route
Depart
Return
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Mon 8/9
06:30-11:55
1 stop13h 25m
Seattle/Tacoma Intl
Sun 14/9
14:20-15:40
1 stop17h 20m
LondonSeattle
LGW - SEA
LGWSEA
London Gatwick
Fri 19/9
15:40-20:40
1 stop13h 00m
Seattle/Tacoma Intl
Tue 7/10
19:00-14:40
1 stop11h 40m
EdinburghSeattle
EDI - SEA
EDISEA
Edinburgh Turnhouse
Wed 17/9
05:55-11:35
1 stop13h 40m
Seattle/Tacoma Intl
Mon 22/9
13:30-13:20
1 stop15h 50m
EdinburghSeattle
EDI - SEA
EDISEA
Edinburgh Turnhouse
Wed 24/9
05:55-11:35
1 stop13h 40m
Seattle/Tacoma Intl
Wed 22/10
20:20-19:35
1 stop15h 15m
LondonSeattle
LCY - SEA
LCYSEA
London City
Mon 1/9
20:10-11:45
1 stop23h 35m
Seattle/Tacoma Intl
Mon 15/9
14:10-16:40
1 stop18h 30m
EdinburghSeattle
EDI - SEA
EDISEA
Edinburgh Turnhouse
Fri 19/9
05:50-11:35
1 stop13h 45m
Seattle/Tacoma Intl
Sat 27/9
10:11-16:45
2 stops22h 34m
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Wed 27/8
06:15-15:55
1 stop17h 40m
Seattle/Tacoma Intl
Mon 8/9
14:10-08:10
1 stop34h 00m
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Wed 27/8
06:15-15:55
1 stop17h 40m
Seattle/Tacoma Intl
Mon 8/9
14:10-08:10
1 stop34h 00m
BirminghamSeattle
BHX - SEA
BHXSEA
Birmingham
Mon 8/9
20:15-16:05
1 stop27h 50m
Seattle/Tacoma Intl
Sun 14/9
22:05-22:10
2 stops40h 05m
Newcastle upon TyneSeattle
NCL - SEA
NCLSEA
Newcastle upon Tyne
Mon 11/8
05:55-11:35
1 stop13h 40m
Seattle/Tacoma Intl
Sun 17/8
13:30-11:00
1 stop13h 30m
| CHEAPEST MONTH TO FLY TO SEATTLE FROM LONDON HEATHROW AIRPORT | February | 17% cheaper | Flying from London Heathrow Airport to Seattle costs on average just £483 in February |
| MOST EXPENSIVE MONTH TO FLY TO SEATTLE FROM LONDON HEATHROW AIRPORT | July | 28% more expensive | It costs about £748 for flights to Seattle from London Heathrow Airport in July |
| MOST POPULAR MONTH TO FLY TO SEATTLE FROM LONDON HEATHROW AIRPORT | August | 220% more users visited | More momondo users searched in flights to Seattle from London Heathrow Airport in August than any other month |
Best One-Way Price | £241 |
|---|---|
Best Round-Trip Price | £401 |
Fastest flight time | 16h 45m |
Popular in | August |
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.
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.
In general, most travellers find the cheapest time to book a flight to Seattle is about 44 days prior to their departure date, when tickets on average are £556. 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 £510 on momondo.
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.
Prices for flights to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
As of July 2025, there are 19 operators available to choose from for flights 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.
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.
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.
Yes. momondo allows you to filter the results for flights to Seattle to just show those with flexible booking policies.
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.
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.