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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — SEA
22 Jan — 29 Jan1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Glasgow to Seattle/Tacoma Intl are usually found in January or September, booked 62 days in advance, depart on a Tuesday or Wednesday and return on a Monday
Cheap flight deals from Glasgow to Seattle
Enter your travel dates to find the best prices.
Best flights from Glasgow to Seattle
Discover carefully curated flight deals from Glasgow to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 December 2025.
Tue 17/212:35GLA - SEA
1 stop12h 25mIcelandair
Sat 28/214:35SEA - GLA
1 stop11h 20mIcelandair
Deal found 21/12£415
Mon 19/110:40GLA - SEA
1 stop33h 10mKLM
Mon 26/115:10SEA - GLA
1 stop23h 00mKLM
Deal found 22/12£485
Mon 19/110:40GLA - SEA
1 stop33h 10mMultiple Airlines
Mon 26/108:00SEA - GLA
2 stops17h 55mMultiple Airlines
Deal found 22/12£488
Thu 5/212:50GLA - SEA
2 stops40h 07mLufthansa
Thu 12/207:00SEA - GLA
2 stops21h 05mLufthansa
Deal found 22/12£497
Fri 20/212:35GLA - SEA
1 stop12h 25mIcelandair
Mon 9/315:35SEA - GLA
1 stop11h 20mIcelandair
Deal found 21/12£433
Tue 17/206:00GLA - SEA
2 stops24h 16mMultiple Airlines
Sat 28/208:10SEA - GLA
2 stops31h 00mMultiple Airlines
Deal found 21/12£497
Wed 4/312:35GLA - SEA
1 stop12h 25mIcelandair
Sun 8/315:35SEA - GLA
1 stop11h 20mIcelandair
Deal found 20/12£455
Fri 20/206:05GLA - SEA
1 stop13h 35mKLM
Mon 9/313:45SEA - GLA
2 stops16h 00mKLM
Deal found 21/12£514
Last-minute flights from Glasgow to Seattle
Discover last-minute flight deals from Glasgow to Seattle. Data last updated 23 December 2025 and is based on user searches.
Thu 1/108:40GLA - SEA
2 stops33h 22mBritish Airways
Thu 22/114:04SEA - GLA
2 stops18h 36mBritish Airways
Deal found 22/12£812
Thu 1/106:05GLA - SEA
1 stop13h 45mMultiple Airlines
Thu 22/115:10SEA - GLA
1 stop23h 00mMultiple Airlines
Deal found 21/12£926
Thu 1/106:05GLA - SEA
1 stop13h 45mKLM
Thu 22/115:10SEA - GLA
1 stop34h 45mKLM
Deal found 22/12£1,112
Thu 1/108:40GLA - SEA
2 stops20h 30mAmerican Airlines
Thu 22/106:12SEA - GLA
2 stops19h 18mAmerican Airlines
Deal found 21/12£1,167
Mon 19/110:40GLA - SEA
1 stop33h 10mKLM
Mon 26/115:10SEA - GLA
1 stop23h 00mKLM
Deal found 22/12£485
Mon 19/110:40GLA - SEA
1 stop33h 10mMultiple Airlines
Mon 26/108:00SEA - GLA
2 stops17h 55mMultiple Airlines
Deal found 22/12£488
One-way flights from Glasgow to Seattle
Search for one-way flight options from Glasgow to Seattle. Find affordable one-way fares based on user searches. Data last updated 23 December 2025.
Fri 5/621:15GLA - SEA
3 stops50h 45mMultiple Airlines
Deal found 22/12£328
Thu 4/621:45GLA - SEA
3 stops26h 15mMultiple Airlines
Deal found 22/12£331
Sat 16/511:00GLA - SEA
2 stops33h 30mWestJet
Deal found 22/12£444
Sun 31/515:55GLA - SEA
1 stop33h 04mAer Lingus
Deal found 21/12£468
Thu 12/211:30GLA - SEA
1 stop13h 25mBritish Airways
Deal found 21/12£478
Thu 4/612:00GLA - SEA
1 stop12h 59mAer Lingus
Deal found 22/12£491
Sun 31/521:25GLA - SEA
2 stops29h 55mIberia
Deal found 21/12£506
Sat 16/517:25GLA - SEA
1 stop26h 10mMultiple Airlines
Deal found 22/12£506
Thu 12/211:30GLA - SEA
2 stops19h 39mMultiple Airlines
Deal found 21/12£510
Tue 6/109:50GLA - SEA
1 stop15h 05mBritish Airways
Deal found 23/12£784
Find flight deals from Glasgow to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Glasgow (GG1) to Seattle (SEA). 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 23 December 2025.
Customise your flight search to find flights from Glasgow to Seattle 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 858,174 searches. Data last updated 23 December 2025.
Use the filters below to find and compare flights from Glasgow to Seattle that are best for you.
Fly from
Glasgow
Fly to
Seattle
Route
Depart
Return
Price
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Tue 17/2
12:35-17:00
1 stop12h 25m
Seattle/Tacoma Intl
Sat 28/2
14:35-09:55
1 stop11h 20m
£415
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Fri 20/2
12:35-17:00
1 stop12h 25m
Seattle/Tacoma Intl
Mon 9/3
15:35-09:55
1 stop11h 20m
£433
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Wed 4/3
12:35-17:00
1 stop12h 25m
Seattle/Tacoma Intl
Sun 8/3
15:35-09:55
1 stop11h 20m
£455
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Mon 19/1
10:40-11:50
1 stop33h 10m
Seattle/Tacoma Intl
Mon 26/1
15:10-22:10
1 stop23h 00m
£485
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Mon 19/1
10:40-11:50
1 stop33h 10m
Seattle/Tacoma Intl
Mon 26/1
08:00-09:55
2 stops17h 55m
£488
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Thu 5/2
12:50-20:57
2 stops40h 07m
Seattle/Tacoma Intl
Thu 12/2
07:00-12:05
2 stops21h 05m
£497
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Tue 17/2
06:00-22:16
2 stops24h 16m
Seattle/Tacoma Intl
Sat 28/2
08:10-23:10
2 stops31h 00m
£497
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Fri 20/2
06:05-11:40
1 stop13h 35m
Seattle/Tacoma Intl
Mon 9/3
13:45-12:45
2 stops16h 00m
£514
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Fri 5/6
21:15-16:00
3 stops50h 45m
£328
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Thu 4/6
21:45-16:00
3 stops26h 15m
£331
Flights are sorted by cheapest return flights first.
Deals found on 22/12
Showing 1-10 of 15 results
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Best time to book a flight from Glasgow to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Glasgow with our price prediction graph.
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 Glasgow to Seattle
How far ahead should I book a flight from Glasgow to Seattle?
Use this chart to determine the optimal time to book a return flight from Glasgow to Seattle. Price data was last updated on 19 December 2025.
The price you pay for your flight from Glasgow to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 62 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 Glasgow to Seattle?
Currently, March is the cheapest month in which you can book a flight from Glasgow to Seattle (average of £360). Flying from Glasgow to Seattle in December is currently the most expensive (average of £593). 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 GLA to SEA?
Find hourly flight availability from Glasgow to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 December 2025.
One of the essential ways to save on airfare from Glasgow to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 2% on airfare.
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated 23 December 2025.
Get a feel of what it's like to fly with KLM, Aer Lingus, andIcelandair from Glasgow to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Not literally sitting in the very last row in the middle
Related info for your journey
Find useful and relevant information for your journey from Glasgow to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly into for flights to Seattle from Glasgow?
Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Glasgow to Seattle. You should not have trouble finding flights to Seattle/Tacoma Intl from Glasgow; the airport handles an average of 0 inbound flights from Glasgow per day. You should also have plenty of airline options to choose from since 9 airlines have flights to the Seattle airport from Glasgow. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.
How long is the flight from Glasgow to Seattle?
There are many flights that can get you from Glasgow to Seattle in 12h 25m. Fly via Icelandair to get the fastest option. There are 4445 mi between Glasgow and Seattle.
What are the cheapest airlines flying from Glasgow to Seattle round-trip?
Cheapflights users have booked flights from Glasgow to Seattle round-trip from £422. Other airlines that can offer you cheap pricing are KLM, from £440, and Lufthansa, from £461. These flights start at 30% lower than the current average price 3 months from now.
Can I find deals for business class flights from Glasgow to Seattle?
Yes. Cheapflights offers flight deals from Glasgow to Seattle 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 Glasgow to Seattle?
Currently, March is the cheapest month in which you can book a flight from Glasgow to Seattle (average of £360). Flying from Glasgow to Seattle in December is currently the most expensive (average of £593). 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.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 23 December 2025.
Discover the top 9 airlines that operate flights from Glasgow to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 23 December 2025.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Glasgow to Seattle?
Cheapflights helps you search for flights from Glasgow to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Glasgow to Seattle?
It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Glasgow to Seattle.
Can Cheapflights find flights from Glasgow to Seattle with no change fees?
Certainly. Search results for flights to Seattle from Glasgow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Glasgow to Seattle become cheaper?
Yes, Cheapflights offers price alerts on Glasgow to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.
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