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Cheap flights from Glasgow Intl Airport to Seattle from £326

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
1 Feb — 8 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Glasgow Intl to Seattle

Enter your travel dates to find the best prices.

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 2 January 2026.

Mon 9/312:35GLA - SEA
1 stop12h 25mIcelandair
Mon 16/315:35SEA - GLA
1 stop11h 20mIcelandair
Deal found 1/1£437
Mon 9/306:05GLA - SEA
2 stops15h 52mDelta
Mon 16/309:00SEA - GLA
2 stops20h 45mDelta
Deal found 1/1£490
Sun 15/217:20GLA - SEA
1 stop26h 20mKLM
Sun 22/214:00SEA - GLA
2 stops38h 45mKLM
Deal found 1/1£501
Sun 15/212:45GLA - SEA
1 stop31h 25mLufthansa
Sun 22/215:10SEA - GLA
2 stops24h 00mLufthansa
Deal found 1/1£520
Fri 1/507:00GLA - SEA
1 stop19h 25mBritish Airways
Tue 5/507:00SEA - GLA
2 stops19h 45mBritish Airways
Deal found 30/12£534
Sun 15/210:40GLA - SEA
3 stops33h 30mMultiple Airlines
Sun 22/215:10SEA - GLA
3 stops33h 20mMultiple Airlines
Deal found 1/1£788
Fri 1/514:20GLA - SEA
1 stop11h 35mIcelandair
Tue 5/519:00SEA - GLA
1 stop10h 25mIcelandair
Deal found 31/12£480
Mon 1/612:00GLA - SEA
1 stop13h 10mBritish Airways
Thu 18/618:55SEA - GLA
1 stop12h 30mBritish Airways
Deal found 1/1£2,381

Find 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 2 January 2026.

Round-trip from

£412

One-way from

£326

Popular in

July

Cheapest in

January

Average price

£487
Icelandair
  • Icelandair
  • 15/2-22/2
  • 2 total stops
  • 23h 45m total
  • Glasgow to Seattle
Search Deals
5/6
  • 5/6
  • 3 total stops
  • 50h 45m total
  • Glasgow to Seattle
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£96 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 2 January 2026.
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

Mon 9/3

12:35-18:00

1 stop12h 25m

Seattle/Tacoma Intl

Mon 16/3

15:35-09:55

1 stop11h 20m

£437

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 1/5

14:20-17:55

1 stop11h 35m

Seattle/Tacoma Intl

Tue 5/5

19:00-13:25

1 stop10h 25m

£480

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 9/3

06:05-14:57

2 stops15h 52m

Seattle/Tacoma Intl

Mon 16/3

09:00-12:45

2 stops20h 45m

£490

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sun 15/2

17:20-11:40

1 stop26h 20m

Seattle/Tacoma Intl

Sun 22/2

14:00-12:45

2 stops38h 45m

£501

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sun 15/2

12:45-12:10

1 stop31h 25m

Seattle/Tacoma Intl

Sun 22/2

15:10-23:10

2 stops24h 00m

£520

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 1/5

07:00-18:25

1 stop19h 25m

Seattle/Tacoma Intl

Tue 5/5

07:00-10:45

2 stops19h 45m

£534

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sun 15/2

10:40-12:10

3 stops33h 30m

Seattle/Tacoma Intl

Sun 22/2

15:10-08:30

3 stops33h 20m

£788

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 1/6

12:00-17:10

1 stop13h 10m

Seattle/Tacoma Intl

Thu 18/6

18:55-15:25

1 stop12h 30m

£2,381

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 5/6

21:15-16:00

3 stops50h 45m

£326

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 4/6

19:00-16:00

3 stops29h 00m

£330

Flights are sorted by cheapest return flights first.

Deals found on 30/12

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 26 December 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 £359). Flying from Glasgow Intl Airport to Seattle in December is currently the most expensive (average of £591). 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.

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 January 2026.
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.
KLM
7.7
Good
1,435 reviews
Check prices

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Boarding

7.7

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,435 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Boarding

7.7

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Aer Lingus
7.2
Good
1,418 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Boarding

7.7

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Icelandair
7.1
Good
593 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Boarding

7.7

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,674 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Boarding

7.7

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,635 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Boarding

7.7

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

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 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 £437. 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 £421 on this airline. Additional options worth looking into are KLM and Lufthansa, starting at £438 and £460 round-trip. Users have found that British Airways is 31% cheaper than the other options available to this destination.

  • 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, March is the cheapest month in which you can book a flight from Glasgow Intl Airport to Seattle (average of £359). Flying from Glasgow Intl Airport to Seattle in December is currently the most expensive (average of £591). 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
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 2 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£421Average£569FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£438Average£608FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£460Average£589FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£472Average£598FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£743Average£774FlexibilityNo 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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