Cheap flights from Glasgow Intl Airport to Seattle from £271
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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — SEA
14 Dec — 21 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Glasgow Intl 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
Find flight deals from Glasgow Intl to Seattle
Enter your travel dates to find the best prices.
Cheapest flights from Glasgow Intl to Seattle
Explore the most affordable flight options available from Glasgow Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 November 2025.
Thu 20/1112:35GLA - SEA
1 stop12h 25mIcelandair
Wed 3/1214:35SEA - GLA
1 stop11h 20mIcelandair
Deal found 11/11£518
Wed 10/1212:00GLA - SEA
1 stop14h 20mAer Lingus
Wed 17/1220:05SEA - GLA
1 stop11h 55mAer Lingus
Deal found 12/11£605
Thu 20/1108:20GLA - SEA
2 stops16h 40mMultiple Airlines
Wed 3/1214:35SEA - GLA
2 stops16h 10mMultiple Airlines
Deal found 11/11£651
Wed 10/1210:55GLA - SEA
2 stops31h 03mFinnair
Wed 17/1213:28SEA - GLA
2 stops18h 22mFinnair
Deal found 12/11£668
Wed 10/1213:25GLA - SEA
1 stop30h 25mVirgin Atlantic
Wed 17/1215:05SEA - GLA
1 stop33h 25mVirgin Atlantic
Deal found 12/11£694
Wed 10/1206:05GLA - SEA
1 stop13h 45mMultiple Airlines
Wed 17/1215:05SEA - GLA
1 stop13h 40mMultiple Airlines
Deal found 12/11£711
Thu 11/1211:30GLA - SEA
2 stops19h 55mIberia
Thu 18/1210:32SEA - GLA
2 stops22h 08mIberia
Deal found 12/11£822
Best flights from Glasgow Intl to Seattle
Discover carefully curated flight deals from Glasgow Intl to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 14 November 2025.
Thu 5/312:35GLA - SEA
1 stop12h 25mIcelandair
Mon 9/315:35SEA - GLA
1 stop11h 20mIcelandair
Deal found 12/11£478
Wed 11/309:45GLA - SEA
1 stop15h 10mBritish Airways
Wed 25/319:50SEA - GLA
1 stop16h 35mBritish Airways
Deal found 13/11£602
Wed 10/1212:00GLA - SEA
1 stop14h 20mAer Lingus
Wed 17/1220:05SEA - GLA
1 stop11h 55mAer Lingus
Deal found 12/11£605
Wed 11/309:05GLA - SEA
2 stops18h 42mDelta
Wed 25/312:10SEA - GLA
2 stops21h 25mDelta
Deal found 13/11£629
Thu 5/308:40GLA - SEA
1 stop16h 15mAmerican Airlines
Mon 9/313:48SEA - GLA
2 stops17h 42mAmerican Airlines
Deal found 12/11£639
Wed 14/112:35GLA - SEA
1 stop12h 25mIcelandair
Sun 18/114:35SEA - GLA
1 stop11h 20mIcelandair
Deal found 12/11£540
Last-minute flights from Glasgow Intl to Seattle
Discover last-minute flight deals from Glasgow Intl to Seattle. Data last updated 14 November 2025 and is based on user searches.
Thu 20/1112:35GLA - SEA
1 stop12h 25mIcelandair
Wed 3/1214:35SEA - GLA
1 stop11h 20mIcelandair
Deal found 11/11£518
Thu 20/1108:20GLA - SEA
2 stops16h 40mMultiple Airlines
Wed 3/1214:35SEA - GLA
2 stops16h 10mMultiple Airlines
Deal found 11/11£651
Wed 10/1212:00GLA - SEA
1 stop14h 20mAer Lingus
Wed 17/1220:05SEA - GLA
1 stop11h 55mAer Lingus
Deal found 12/11£605
Wed 10/1210:55GLA - SEA
2 stops31h 03mFinnair
Wed 17/1213:28SEA - GLA
2 stops18h 22mFinnair
Deal found 12/11£668
Wed 10/1213:25GLA - SEA
1 stop30h 25mVirgin Atlantic
Wed 17/1215:05SEA - GLA
1 stop33h 25mVirgin Atlantic
Deal found 12/11£694
Wed 10/1206:05GLA - SEA
1 stop13h 45mMultiple Airlines
Wed 17/1215:05SEA - GLA
1 stop13h 40mMultiple Airlines
Deal found 12/11£711
Thu 11/1211:30GLA - SEA
2 stops19h 55mIberia
Thu 18/1210:32SEA - GLA
2 stops22h 08mIberia
Deal found 12/11£822
One-way flights from Glasgow Intl to Seattle
Search for one-way flight options from Glasgow Intl to Seattle. Find affordable one-way fares based on user searches. Data last updated 14 November 2025.
Mon 23/323:35GLA - SEA
3 stops45h 44mMultiple Airlines
Deal found 11/11£271
Mon 1/1220:30GLA - SEA
3 stops58h 49mMultiple Airlines
Deal found 12/11£413
Sun 10/510:05GLA - SEA
2 stops19h 07mBritish Airways
Deal found 13/11£565
Mon 1/1220:25GLA - SEA
1 stop23h 05mBritish Airways
Deal found 12/11£584
Sat 13/1212:45GLA - SEA
2 stops18h 40mBritish Airways
Deal found 12/11£595
Sun 10/514:20GLA - SEA
1 stop11h 30mIcelandair
Deal found 13/11£919
Sun 3/520:25GLA - SEA
1 stop23h 10mBritish Airways
Deal found 13/11£1,026
Cheap flight deals from Glasgow Intl to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Glasgow Intl (GLA) 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 14 November 2025.
Customise your flight search to find flights from Glasgow Intl 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 14 November 2025.
Use the filters below to find and compare flights from Glasgow Intl Airport to Seattle that are best for you.
Fly from
Glasgow Intl
Fly to
Seattle
Route
Depart
Return
Price
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Thu 5/3
12:35-17:00
1 stop12h 25m
Seattle/Tacoma Intl
Mon 9/3
15:35-09:55
1 stop11h 20m
£478
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Wed 14/1
12:35-17:00
1 stop12h 25m
Seattle/Tacoma Intl
Sun 18/1
14:35-09:55
1 stop11h 20m
£540
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Wed 11/3
09:45-17:55
1 stop15h 10m
Seattle/Tacoma Intl
Wed 25/3
19:50-19:25
1 stop16h 35m
£602
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Wed 10/12
12:00-18:20
1 stop14h 20m
Seattle/Tacoma Intl
Wed 17/12
20:05-16:00
1 stop11h 55m
£605
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Wed 11/3
09:05-20:47
2 stops18h 42m
Seattle/Tacoma Intl
Wed 25/3
12:10-16:35
2 stops21h 25m
£629
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Thu 5/3
08:40-16:55
1 stop16h 15m
Seattle/Tacoma Intl
Mon 9/3
13:48-14:30
2 stops17h 42m
£639
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Mon 23/3
23:35-14:19
3 stops45h 44m
£271
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Mon 1/12
20:30-23:19
3 stops58h 49m
£413
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Sun 10/5
10:05-21:12
2 stops19h 07m
£565
GlasgowSeattle
GLA - SEA
GLASEA
Glasgow Intl
Sat 13/12
06:35-11:30
1 stop12h 55m
£584
Flights are sorted by cheapest return flights first.
Deals found on 11/11
Showing 1-10 of 12 results
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Best time to book a flight from Glasgow Intl to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Glasgow Intl 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 Intl Airport to Seattle
Prices
More
How far ahead should I book a flight from Glasgow Intl Airport to Seattle?
Use this chart to determine the optimal time to book a return flight from Glasgow Intl to Seattle. Price data was last updated on 7 November 2025.
To ensure you get the cheapest price possible for a flight from Glasgow Intl Airport to Seattle, you should look to book at least 62 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Glasgow Intl Airport to Seattle?
Currently, March is the cheapest month in which you can book a flight from Glasgow Intl Airport to Seattle (average of £368). Flying from Glasgow Intl Airport to Seattle in December is currently the most expensive (average of £649). 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’s the top stopover airport for flights from Glasgow Intl Airport to Seattle?
Share of one-stop return flights from Glasgow Intl Airport to Seattle chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Reykjavik (KEF) – chosen by Cheapflights users on 47% of one-stop itineraries from Glasgow Intl Airport to Seattle on Cheapflights.
What’s the fastest stopover option from Glasgow Intl Airport to Seattle?
Shortest average travel time for one-stop one-way flights from Glasgow Intl Airport to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 12h 33m.
What’s the fastest stopover option from Glasgow Intl Airport to Seattle?
Shortest average travel time for one-stop one-way flights from Glasgow Intl Airport to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 12h 33m.
Which airport typically offers the quickest stopover for flights from Glasgow Intl Airport to Seattle?
Average stopover duration for one-stop one-way flights from Glasgow Intl Airport to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Paris (CDG) offer the fastest connection on this route, with an average stopover time of 1h 30m.
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 14 November 2025.
Get a feel of what it's like to fly with KLM, Aer Lingus, andIcelandair from Glasgow Intl Airport 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.
The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Related info for your journey
Find useful and relevant information for your journey from Glasgow Intl 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 Intl?
Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from Glasgow Intl. Booking flights from Glasgow Intl to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 0 daily inbound flights from Glasgow Intl from 5 different airlines.
How long is the flight from Glasgow Intl Airport to Seattle?
A quick flight from Glasgow Intl Airport to Seattle can take about 12h 25m. Icelandair provides one of the quickest options available for as low as £478. Airlines will cover a distance of 4445 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Glasgow Intl Airport to Seattle round-trip?
Our cheapest airline available from Glasgow Intl Airport to Seattle is British Airways. Our recent data shows that you can find tickets from as low as £431 on this airline. Additional options worth looking into are KLM and Lufthansa, starting at £449 and £471 round-trip. Users have found that British Airways is 32% cheaper than the other options available to this destination.
Can I find deals for business class flights from Glasgow Intl to Seattle?
Yes. Cheapflights offers flight deals from Glasgow Intl 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 Intl Airport to Seattle?
Currently, March is the cheapest month in which you can book a flight from Glasgow Intl Airport to Seattle (average of £368). Flying from Glasgow Intl Airport to Seattle in December is currently the most expensive (average of £649). 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.
Browse through other flights departing from Glasgow Intl. Flights are based on user searches made on Cheapflights and were last updated on 14 November 2025.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 14 November 2025.
Top 5 airlines flying from Glasgow Intl to Seattle
Discover the top 5 airlines that operate flights from Glasgow Intl 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 14 November 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 Intl to Seattle?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Glasgow Intl to Seattle. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from Glasgow Intl to Seattle?
Cheapflights simply makes it quick and affordable to book flights from Glasgow Intl to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from Glasgow Intl to Seattle with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Glasgow Intl to Seattle, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Glasgow Intl to Seattle become cheaper?
Yes, Cheapflights offers price alerts on Glasgow Intl 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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