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$692+ Cheap flights from Glasgow Intl (GLA) to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 Monday 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 September 11, 2025.

Round-trip from

$692
(Icelandair)

Popular in

July

Cheapest in

February

Average price

$729
From Glasgow Intl to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($160 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 11, 2025.

This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/912:35 pmGLA - SEA
1 stop12h 25mIcelandair
Tue 1/62:35 pmSEA - GLA
1 stop11h 20mIcelandair
Deal found 9/10$695
This Mytrip deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/264:15 pmGLA - SEA
2 stops27h 55mMultiple Airlines
Sun 11/23:10 pmSEA - GLA
2 stops22h 25mMultiple Airlines
Deal found 9/11$708
This Icelandair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1211:05 amGLA - SEA
1 stop13h 55mIcelandair
Wed 1/72:35 pmSEA - GLA
1 stop11h 20mIcelandair
Deal found 9/10$717
This Icelandair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1312:35 pmGLA - SEA
1 stop12h 25mIcelandair
Thu 1/82:35 pmSEA - GLA
1 stop11h 20mIcelandair
Deal found 9/10$740
This Icelandair deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1312:35 pmGLA - SEA
1 stop12h 25mIcelandair
Tue 1/62:35 pmSEA - GLA
1 stop11h 20mIcelandair
Deal found 9/11$741
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:00 amGLA - SEA
1 stop13h 50mDelta
Thu 10/165:40 pmSEA - GLA
1 stop14h 30mDelta
Deal found 9/11$743
This Mytrip deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:20 pmGLA - SEA
3 stops28h 40mMultiple Airlines
Sun 10/194:20 pmSEA - GLA
2 stops21h 05mMultiple Airlines
Deal found 9/11$746
This British Airways deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:35 amGLA - SEA
1 stop18h 20mBritish Airways
Tue 1/66:50 pmSEA - GLA
1 stop16h 35mBritish Airways
Deal found 9/10$753
This British Airways deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:35 amGLA - SEA
1 stop18h 20mBritish Airways
Wed 1/76:50 pmSEA - GLA
1 stop15h 25mBritish Airways
Deal found 9/11$754
This British Airways deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:35 amGLA - SEA
1 stop13h 20mBritish Airways
Thu 1/81:40 pmSEA - GLA
2 stops17h 30mBritish Airways
Deal found 9/10$757

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated September 11, 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 3/5

12:35 pm-5:00 pm

1 stop12h 25m

Seattle/Tacoma Intl

Mon 3/9

3:35 pm-9:55 am

1 stop11h 20m

$692

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sun 10/26

4:15 pm-1:10 pm

2 stops27h 55m

Seattle/Tacoma Intl

Sun 11/2

3:10 pm-9:35 pm

2 stops22h 25m

$708

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 12/12

11:05 am-5:00 pm

1 stop13h 55m

Seattle/Tacoma Intl

Wed 1/7

2:35 pm-9:55 am

1 stop11h 20m

$717

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 12/12

11:05 am-5:00 pm

1 stop13h 55m

Seattle/Tacoma Intl

Tue 1/6

2:35 pm-9:55 am

1 stop11h 20m

$717

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 12/11

12:35 pm-5:00 pm

1 stop12h 25m

Seattle/Tacoma Intl

Wed 1/7

2:35 pm-9:55 am

1 stop11h 20m

$717

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Wed 12/10

12:35 pm-5:00 pm

1 stop12h 25m

Seattle/Tacoma Intl

Thu 1/8

2:35 pm-9:55 am

1 stop11h 20m

$717

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 12/9

12:35 pm-5:00 pm

1 stop12h 25m

Seattle/Tacoma Intl

Thu 1/8

2:35 pm-9:55 am

1 stop11h 20m

$717

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 12/11

12:35 pm-5:00 pm

1 stop12h 25m

Seattle/Tacoma Intl

Thu 1/8

2:35 pm-9:55 am

1 stop11h 20m

$717

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Wed 12/10

12:35 pm-5:00 pm

1 stop12h 25m

Seattle/Tacoma Intl

Wed 1/7

2:35 pm-9:55 am

1 stop11h 20m

$718

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 10/20

2:20 pm-5:50 pm

1 stop11h 30m

$739

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 13 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 round-trip 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 round-trip flight from Glasgow Intl to Seattle. Price data was last updated on August 29, 2025.

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Glasgow Intl Airport to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 $238). Flying from Glasgow Intl Airport to Seattle in June is currently the most expensive (average of $388). 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 September 11, 2025.
Peruse reviews from past customers who have flown with British Airways from Glasgow Intl Airport to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,361 reviews

Boarding

6.9

Overall

6.7

Entertainment

6.4

Food

6.3

Crew

7.6

Comfort

6.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

LHR - LAX

We needed assistance (wheelchair, golf cart, whatever ) to get to next gate. We requested it. None was provided.
British Airways
6.7
Okay
7,361 reviews
British Airways
6.7
Okay
7,361 reviews

Boarding

6.9

Overall

6.7

Entertainment

6.4

Food

6.3

Crew

7.6

Comfort

6.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

LHR - LAX

We needed assistance (wheelchair, golf cart, whatever ) to get to next gate. We requested it. None was provided.

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 1 airline.

  • 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 $692. The distance from Glasgow Intl Airport to Seattle is about 4445 mi.

  • What is the cheapest airline to fly from Glasgow Intl Airport to Seattle round-trip?

    Flying on British Airways is currently your cheapest option to Seattle, with prices starting at $421. British Airways is currently priced 49% below the average price you’ll pay for this route.

  • 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 vacation 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 $238). Flying from Glasgow Intl Airport to Seattle in June is currently the most expensive (average of $388). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
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Leavenworth
Lacey
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Olympia
Kent
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Shoreline

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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 airline flying from Glasgow Intl to Seattle

Discover the top airline 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 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$421Average$916FlexibilityNo cancel feeOn-time70%

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