Cheap flights from Glasgow to Seattle from £353

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — SEA
7 Sep — 14 Sep1
1 adult

Cheapflights Tip: The best prices from Glasgow to Seattle/Tacoma Intl are usually found in February 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

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 2 September 2025.

Round-trip from

£482

One-way from

£353

Popular in

July

Cheapest in

February

Average price

£539
Icelandair
  • Icelandair
  • 30/9-7/10
  • 2 total stops
  • 24h 45m total
  • Glasgow to Seattle
30/9
  • 30/9
  • 3 total stops
  • 58h 35m total
  • Glasgow to Seattle
Highest demand for flights based on searches. 16% potential increase in price (£87 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from Glasgow to Seattle

Cheapest flights from Glasgow to Seattle
Explore the most affordable flight options available from Glasgow to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 September 2025.

Tue 30/914:20GLA - SEA
1 stop14h 20mIcelandair
Tue 7/1019:00SEA - GLA
1 stop10h 25mIcelandair
Deal found 31/8£482
Thu 25/914:20GLA - SEA
1 stop14h 20mIcelandair
Sun 5/1015:45SEA - GLA
1 stop13h 40mIcelandair
Deal found 1/9£482
Thu 2/1014:20GLA - SEA
1 stop14h 20mIcelandair
Tue 7/1015:45SEA - GLA
1 stop13h 40mIcelandair
Deal found 31/8£499
Sat 27/914:20GLA - SEA
1 stop14h 20mIcelandair
Sun 5/1019:00SEA - GLA
1 stop10h 25mIcelandair
Deal found 31/8£505
Wed 1/1007:00GLA - SEA
1 stop12h 35mBritish Airways
Tue 7/1013:30SEA - GLA
1 stop12h 10mBritish Airways
Deal found 31/8£505
Wed 15/1008:25GLA - SEA
2 stops16h 34mMultiple Airlines
Wed 22/1014:20SEA - GLA
2 stops17h 05mMultiple Airlines
Deal found 31/8£508
Wed 1/1007:00GLA - SEA
1 stop12h 35mBritish Airways
Mon 6/1013:30SEA - GLA
1 stop12h 35mBritish Airways
Deal found 31/8£512
Tue 30/905:50GLA - SEA
2 stops19h 39mAmerican Airlines
Tue 7/1020:20SEA - GLA
1 stop14h 30mAmerican Airlines
Deal found 31/8£514
Wed 1/1006:00GLA - SEA
1 stop13h 50mDelta
Tue 7/1013:30SEA - GLA
2 stops18h 40mDelta
Deal found 31/8£518
Fri 10/1014:20GLA - SEA
1 stop14h 20mIcelandair
Sun 19/1019:00SEA - GLA
1 stop10h 25mIcelandair
Deal found 30/8£522
Fri 17/1014:20GLA - SEA
1 stop14h 20mIcelandair
Fri 24/1015:45SEA - GLA
1 stop13h 40mIcelandair
Deal found 2/9£523

Cheapflights Fare Finder

 
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 2 September 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 30/9

14:20-20:40

1 stop14h 20m

Seattle/Tacoma Intl

Tue 7/10

19:00-13:25

1 stop10h 25m

£482

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Wed 15/10

08:25-17:50

1 stop17h 25m

Seattle/Tacoma Intl

Wed 22/10

19:35-17:05

1 stop13h 30m

£482

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 25/9

14:20-20:40

1 stop14h 20m

Seattle/Tacoma Intl

Sun 5/10

15:45-13:25

1 stop13h 40m

£482

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 2/10

14:20-17:50

1 stop11h 30m

Seattle/Tacoma Intl

Mon 6/10

19:00-13:25

1 stop10h 25m

£499

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 2/10

14:20-17:50

1 stop11h 30m

Seattle/Tacoma Intl

Wed 8/10

19:00-13:25

1 stop10h 25m

£499

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 2/10

14:20-20:40

1 stop14h 20m

Seattle/Tacoma Intl

Tue 7/10

15:45-13:25

1 stop13h 40m

£499

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sat 27/9

14:20-20:40

1 stop14h 20m

Seattle/Tacoma Intl

Sat 4/10

19:00-13:25

1 stop10h 25m

£505

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 30/9

14:20-20:40

1 stop14h 20m

Seattle/Tacoma Intl

Wed 8/10

19:00-13:25

1 stop10h 25m

£505

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 30/9

14:20-20:40

1 stop14h 20m

Seattle/Tacoma Intl

Mon 6/10

15:45-13:25

1 stop13h 40m

£505

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 25/9

14:20-17:50

1 stop11h 30m

Seattle/Tacoma Intl

Mon 6/10

15:45-13:25

1 stop13h 40m

£505

Flights are sorted by cheapest return flights first.

Deals found on 2/9

Showing 1-10 of 21 results
1
2
3

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 29 August 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, January is the cheapest month in which you can book a flight from Glasgow to Seattle (average of £622). Flying from Glasgow to Seattle in July is currently the most expensive (average of £946). 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 2 September 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 9% 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 2 September 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.

Entertainment

7.1

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Entertainment

7.1

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Entertainment

7.1

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Entertainment

7.1

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Entertainment

7.1

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Entertainment

7.1

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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 14h 20m. 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 £428. Other airlines that can offer you cheap pricing are KLM, from £436, and Lufthansa, from £458. These flights start at 30% lower than the current average price 3 months from now.

  • Can I find deals for flights from Glasgow to Seattle that include hotel bookings?

    Yes. In addition to deals on Glasgow to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Glasgow to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Glasgow to Seattle.

  • 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, January is the cheapest month in which you can book a flight from Glasgow to Seattle (average of £622). Flying from Glasgow to Seattle in July is currently the most expensive (average of £946). 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.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

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Alternative routes for Glasgow to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Top 9 airlines flying from Glasgow to Seattle

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 2 September 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£415Average£601FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£428Average£591FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£436Average£608FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£454Average£612FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£458Average£586FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£463Average£598FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£491Average£618FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapest£504Average£637FlexibilityNo cancel feeOn-time77%
Search Air France flights
Aer LingusCheapest£655Average£811FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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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