Find flights
When to book
Airlines
FAQs

Cheap flights from Glasgow Intl Airport to Seattle from £347

GLA — SEA
21 Sep — 28 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Glasgow Intl to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Glasgow Intl to Seattle

Sat 3/1011:10 -
2 stops31h 25m
Tue 13/1019:00 -
1 stop10h 25m
Deal found 21/8£510
Mon 5/1007:10 -
2 stops22h 49m
Mon 12/1019:00 -
1 stop10h 25m
Deal found 21/8£519
Tue 6/1014:20 -
1 stop11h 35m
Tue 27/1015:35 -
1 stop11h 20m
Deal found 21/8£591
Tue 22/907:05 -
3 stops43h 40m
Wed 30/919:00 -
1 stop10h 25m
Deal found 17/8£596
Tue 22/914:20 -
1 stop11h 35m
Wed 30/919:00 -
1 stop10h 25m
Deal found 17/8£610
Tue 6/1013:05 -
1 stop30h 30m
Tue 27/1010:31 -
2 stops21h 04m
Deal found 17/8£611
Sun 6/914:20 -
1 stop29h 25m
Tue 22/919:00 -
1 stop10h 25m
Deal found 19/8£612
Tue 22/913:05 -
2 stops43h 06m
Wed 30/913:30 -
1 stop12h 50m
Deal found 17/8£616

Find flight deals from Glasgow Intl to Seattle

Round-trip from

£510

One-way from

£347

Popular in

August

Cheapest in

January

Average price

£749
Icelandair
  • Icelandair
  • 3/10-13/10
  • 3 total stops
  • 41h 50m total
  • Glasgow to Seattle
Search Deals
3/9
  • 3/9
  • 3 total stops
  • 57h 20m total
  • Glasgow to Seattle
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Glasgow Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Tue 22/9

07:05-18:45

3 stops43h 40m

Seattle/Tacoma Intl

Wed 30/9

19:00-13:25

1 stop10h 25m

£596

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Mon 5/10

09:10-20:50

2 stops19h 40m

Seattle/Tacoma Intl

Mon 12/10

09:36-12:55

2 stops19h 19m

£683

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Mon 21/9

06:00-19:04

2 stops21h 04m

Seattle/Tacoma Intl

Mon 5/10

07:30-12:55

2 stops21h 25m

£684

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Sat 17/10

06:00-16:48

2 stops18h 48m

Seattle/Tacoma Intl

Tue 20/10

13:45-16:10

1 stop18h 25m

£693

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Sat 3/10

10:25-22:03

2 stops19h 38m

Seattle/Tacoma Intl

Tue 13/10

09:36-12:55

2 stops19h 19m

£695

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Wed 9/9

11:00-09:40

3 stops30h 40m

Seattle/Tacoma Intl

Sun 13/9

15:40-21:20

2 stops21h 40m

£698
Fastest return journey

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Sat 31/10

06:35-12:25

1 stop12h 50m

Seattle/Tacoma Intl

Tue 3/11

06:12-09:55

2 stops19h 43m

£710

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Sat 31/10

11:40-17:50

1 stop13h 10m

Seattle/Tacoma Intl

Mon 2/11

06:12-10:05

2 stops19h 53m

£710

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Thu 29/10

12:40-00:36

2 stops18h 56m

Seattle/Tacoma Intl

Tue 3/11

09:15-09:55

2 stops16h 40m

£720
Cheapest one-way
Fastest single journey

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Sat 12/12

06:35-11:25

1 stop12h 50m

£424

Flights are sorted by cheapest return flights first.

Deals found on 19/8

Showing 1-10 of 12 resultsSorted by cheapest first
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

Cheapflights Insights

Everything you need to know about your flight from Glasgow Intl Airport to Seattle

How much does it cost for a return flight from Glasgow Intl Airport to Seattle?

Airfare is below average for this route at the moment.

Glasgow Intl Airport to Seattle flights typically cost between £625 and £891 in October.
The cheapest return price found within the last 5 days was £510 on Multiple Airlines (3 Oct–13 Oct).

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with Aer Lingus,Icelandair, andBritish Airways 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.
Aer Lingus
7.3
Good
1,713 reviews
Check prices

Food

6.7

Boarding

7.5

Entertainment

7.0

Comfort

7.2

Overall

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.
Aer Lingus
7.3
Good
1,713 reviews
Aer Lingus
7.3
Good
1,713 reviews
Check prices

Food

6.7

Boarding

7.5

Entertainment

7.0

Comfort

7.2

Overall

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.
Icelandair
6.9
Okay
732 reviews
Aer Lingus
7.3
Good
1,713 reviews
Check prices

Food

6.7

Boarding

7.5

Entertainment

7.0

Comfort

7.2

Overall

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.
British Airways
6.7
Okay
8,183 reviews
Aer Lingus
7.3
Good
1,713 reviews
Check prices

Food

6.7

Boarding

7.5

Entertainment

7.0

Comfort

7.2

Overall

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.

Related info for your journey

  • 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 3 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 19h 40m. Delta provides one of the quickest options available for as low as £683. Airlines will cover a distance of 4445 mi.

  • 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 £442 on this airline. Additional options worth looking into are British Airways and Aer Lingus, starting at £535 and £594 round-trip. Users have found that Icelandair is 30% 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.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Federal Way
SeaTac

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Glasgow Intl to Seattle

Glasgow Intl to Portland flights

Top 3 airlines flying from Glasgow Intl to Seattle

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£442Average£614FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£535Average£770FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£594Average£748FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.