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Cheap flights from Glasgow Intl Airport to Seattle from £443

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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — SEA
4 Aug — 11 Aug1
1 adult

Cheapflights Tip: The best prices from Glasgow Intl 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 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 30 July 2025.

Round-trip from

£468

One-way from

£443

Popular in

July

Cheapest in

February

Average price

£822
11/9-18/9
  • 11/9-18/9
  • 2 total stops
  • 36h 25m total
  • Glasgow to Seattle
Search Deals
Icelandair
  • Icelandair
  • 1/12
  • 1 total stop
  • 12h 25m total
  • Glasgow to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£85 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Glasgow Intl to Seattle

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 30 July 2025.

Thu 11/908:10GLA - SEA
1 stop17h 40mMultiple Airlines
Thu 18/919:35SEA - GLA
1 stop18h 45mMultiple Airlines
Deal found 28/7£468
Fri 12/914:20GLA - SEA
1 stop11h 30mIcelandair
Fri 19/919:00SEA - GLA
1 stop10h 25mIcelandair
Deal found 29/7£516
Sun 14/915:40GLA - SEA
1 stop27h 55mBritish Airways
Tue 30/913:30SEA - GLA
1 stop13h 15mBritish Airways
Deal found 29/7£553
Wed 27/806:15GLA - SEA
1 stop17h 40mKLM
Mon 8/914:10SEA - GLA
1 stop34h 00mKLM
Deal found 29/7£632
Sun 14/906:00GLA - SEA
2 stops21h 00mVirgin Atlantic
Tue 30/906:00SEA - GLA
2 stops18h 10mVirgin Atlantic
Deal found 29/7£644
Tue 18/1109:50GLA - SEA
1 stop15h 05mFinnair
Sat 29/1100:59SEA - GLA
2 stops28h 16mFinnair
Deal found 29/7£744
Sun 28/915:55GLA - SEA
1 stop33h 55mAer Lingus
Fri 10/1000:34SEA - GLA
2 stops26h 56mAer Lingus
Deal found 29/7£789
Mon 28/713:10GLA - SEA
2 stops39h 38mLufthansa
Tue 12/813:00SEA - GLA
2 stops26h 00mLufthansa
Deal found 28/7£1,338

Cheapflights Fare Finder

 
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 30 July 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 11/9

08:10-17:50

1 stop17h 40m

Seattle/Tacoma Intl

Thu 18/9

19:35-22:20

1 stop18h 45m

£468

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 12/9

14:20-17:50

1 stop11h 30m

Seattle/Tacoma Intl

Fri 19/9

19:00-13:25

1 stop10h 25m

£516

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sun 14/9

15:40-11:35

1 stop27h 55m

Seattle/Tacoma Intl

Tue 30/9

13:30-10:45

1 stop13h 15m

£553

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

£632

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sun 14/9

06:00-19:00

2 stops21h 00m

Seattle/Tacoma Intl

Tue 30/9

06:00-08:10

2 stops18h 10m

£644

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 1/1

08:40-19:57

2 stops19h 17m

Seattle/Tacoma Intl

Thu 22/1

08:20-10:45

2 stops18h 25m

£650

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 18/11

09:50-16:55

1 stop15h 05m

Seattle/Tacoma Intl

Sat 29/11

00:59-13:15

2 stops28h 16m

£744

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sun 28/9

15:55-17:50

1 stop33h 55m

Seattle/Tacoma Intl

Fri 10/10

00:34-11:30

2 stops26h 56m

£789

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sun 28/9

13:10-11:55

1 stop30h 45m

Seattle/Tacoma Intl

Sat 11/10

14:20-12:20

1 stop14h 00m

£1,531

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 1/12

12:35-17:00

1 stop12h 25m

£443

Flights are sorted by cheapest return flights first.

Deals found on 29/7

Showing 1-10 of 15 results
1
2

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

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 25 July 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, January is the cheapest month in which you can book a flight from Glasgow Intl Airport to Seattle (average of £622). Flying from Glasgow Intl Airport 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’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 48% of one-stop itineraries from Glasgow Intl Airport to Seattle on Cheapflights.

What’s the cheapest stopover airport for flights from Glasgow Intl Airport to Seattle?

Average return fare for one-stop flights from Glasgow Intl Airport to Seattle, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Frankfurt am Main (FRA) is the most affordable one-stop option, with an average return flight price of £546.

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 Chicago (ORD) have the shortest average one-way travel time for one-stop routes: 6h 54m.

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 30 July 2025.
Get a feel of what it's like to fly with KLM, Finnair, andVirgin Atlantic 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.
KLM
7.8
Good
1,383 reviews
Check prices

Food

7.3

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Entertainment

7.1

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.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews
Check prices

Food

7.3

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Entertainment

7.1

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.
Finnair
7.6
Good
1,316 reviews
KLM
7.8
Good
1,383 reviews
Check prices

Food

7.3

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Entertainment

7.1

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.
Virgin Atlantic
7.4
Good
655 reviews
KLM
7.8
Good
1,383 reviews
Check prices

Food

7.3

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Entertainment

7.1

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.
American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,383 reviews
Check prices

Food

7.3

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Entertainment

7.1

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.
Aer Lingus
7.1
Good
1,190 reviews
KLM
7.8
Good
1,383 reviews
Check prices

Food

7.3

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Entertainment

7.1

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 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.

  • 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 Icelandair. Our recent data shows that you can find tickets from as low as £516 on this airline. Additional options worth looking into are British Airways and KLM, starting at £553 and £632 round-trip. Users have found that Icelandair is 18% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Glasgow Intl Airport to Seattle one-way?

    £443 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on Aer Lingus and British Airways, with prices starting from £492 and £608, respectively.

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

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

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

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

  • 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, January is the cheapest month in which you can book a flight from Glasgow Intl Airport to Seattle (average of £622). Flying from Glasgow Intl Airport 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 Intl to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Glasgow Intl to Portland flights

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 30 July 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£434Average£612FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£443Average£616FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£464Average£595FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£485Average£616FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£665Average£779FlexibilityNo 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 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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