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Cheap flights from Glasgow to Seattle from £303

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — SEA
28 Feb — 7 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Glasgow to Seattle

Enter your travel dates to find the best prices.

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 29 January 2026.

Wed 4/312:35
GLA
-
SEA
1 stop12h 25m
Icelandair
Sun 8/315:00
SEA
-
GLA
1 stop11h 55m
Icelandair
Deal found 27/1£428
Wed 4/320:45
GLA
-
SEA
2 stops30h 33m
Multiple Airlines
Sun 8/315:00
SEA
-
GLA
1 stop11h 55m
Multiple Airlines
Deal found 27/1£441
Mon 14/914:20
GLA
-
SEA
1 stop14h 20m
Icelandair
Wed 30/915:40
SEA
-
GLA
1 stop13h 45m
Icelandair
Deal found 27/1£450
Sat 12/914:20
GLA
-
SEA
1 stop11h 35m
Icelandair
Fri 18/919:00
SEA
-
GLA
1 stop10h 25m
Icelandair
Deal found 29/1£455
Fri 1/514:20
GLA
-
SEA
1 stop11h 35m
Icelandair
Tue 5/519:00
SEA
-
GLA
1 stop10h 25m
Icelandair
Deal found 26/1£468
Mon 14/917:25
GLA
-
SEA
1 stop26h 30m
Lufthansa
Wed 30/908:00
SEA
-
GLA
2 stops24h 30m
Lufthansa
Deal found 27/1£501
Mon 14/913:50
GLA
-
SEA
2 stops36h 46m
Multiple Airlines
Wed 30/907:00
SEA
-
GLA
2 stops25h 30m
Multiple Airlines
Deal found 27/1£506
Mon 14/912:15
GLA
-
SEA
1 stop14h 10m
British Airways
Wed 30/920:20
SEA
-
GLA
1 stop15h 25m
British Airways
Deal found 27/1£510
Fri 1/508:35
GLA
-
SEA
2 stops21h 51m
British Airways
Tue 5/511:16
SEA
-
GLA
2 stops17h 59m
British Airways
Deal found 26/1£532

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 29 January 2026.

Round-trip from

£428

One-way from

£303

Popular in

July

Cheapest in

January

Average price

£476
Icelandair
  • Icelandair
  • 4/3-8/3
  • 2 total stops
  • 24h 20m total
  • Glasgow to Seattle
Search Deals
30/5
  • 30/5
  • 3 total stops
  • 38h 35m total
  • Glasgow to Seattle
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£91 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 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 29 January 2026.
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

Wed 4/3

12:35-17:00

1 stop12h 25m

Seattle/Tacoma Intl

Sun 8/3

15:00-09:55

1 stop11h 55m

£428

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Wed 4/3

20:45-19:18

2 stops30h 33m

Seattle/Tacoma Intl

Sun 8/3

15:00-09:55

1 stop11h 55m

£441

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 1/5

14:20-20:40

1 stop14h 20m

Seattle/Tacoma Intl

Tue 5/5

15:40-13:25

1 stop13h 45m

£479

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 1/5

08:35-22:26

2 stops21h 51m

Seattle/Tacoma Intl

Tue 5/5

11:16-13:15

2 stops17h 59m

£532

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sat 14/3

06:35-12:30

1 stop12h 55m

Seattle/Tacoma Intl

Sat 21/3

19:50-17:10

1 stop14h 20m

£679

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sat 14/3

06:00-13:10

1 stop14h 10m

Seattle/Tacoma Intl

Sat 21/3

08:00-12:05

2 stops21h 05m

£699

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sat 30/5

07:40-19:19

2 stops19h 39m

£363

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 4/5

14:20-17:55

1 stop11h 35m

£382

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Wed 6/5

14:20-17:55

1 stop11h 35m

£382

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 12/2

07:15-17:00

2 stops17h 45m

£392

Flights are sorted by cheapest return flights first.

Deals found on 28/1

Showing 1-10 of 14 results
1
2

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 23 January 2026.

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 70 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 £354). Flying from Glasgow to Seattle in December is currently the most expensive (average of £577). 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 29 January 2026.
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.
KLM
7.7
Good
1,443 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Aer Lingus
7.2
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Icelandair
7.1
Good
606 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,752 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,705 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 8 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 or British Airways to get the fastest option. There are 4445 mi between Glasgow and Seattle. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from Glasgow to Seattle round-trip?

    Cheapflights users have booked flights from Glasgow to Seattle round-trip from £438. Other airlines that can offer you cheap pricing are KLM, from £444, and Lufthansa, from £449. These flights start at 26% 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, March is the cheapest month in which you can book a flight from Glasgow to Seattle (average of £354). Flying from Glasgow to Seattle in December is currently the most expensive (average of £577). 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
Federal Way
SeaTac

Browse thousands of different options on Cheapflights for your next trip

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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.
Glasgow Intl to Seattle flights
Edinburgh to Seattle flights
Edinburgh to Portland flights
Glasgow Intl to Portland flights
Edinburgh to Pasco flights

Top 8 airlines flying from Glasgow to Seattle

Discover the top 8 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 29 January 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£438Average£585FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£444Average£605FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£445Average£597FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£449Average£591FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£450Average£571FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£495Average£594FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapest£572Average£740FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£629Average£780FlexibilityNo 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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