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Cheap flights from Glasgow Intl Airport to Seattle from £299

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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — SEA
4 May — 11 May1
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 29 April 2025.

Round-trip from

£567

One-way from

£299

Popular in

August

Cheapest in

February

Average price

£626
KLM
  • KLM
  • 1/9-15/9
  • 4 total stops
  • 34h 40m total
  • Glasgow to Seattle
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26/5
  • 26/5
  • 3 total stops
  • 47h 08m total
  • Glasgow to Seattle
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£58 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
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Average for round-trip flights in April 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 29 April 2025.

Mon 1/906:00GLA - SEA
2 stops18h 00mKLM
Mon 15/915:30SEA - GLA
2 stops16h 40mKLM
Deal found 29/4£567
Mon 1/909:05GLA - SEA
1 stop17h 15mMultiple Airlines
Mon 15/920:20SEA - GLA
1 stop14h 10mMultiple Airlines
Deal found 29/4£582
Mon 1/909:05GLA - SEA
1 stop17h 15mFinnair
Mon 15/913:29SEA - GLA
2 stops17h 11mFinnair
Deal found 29/4£587
Sat 11/1014:20GLA - SEA
1 stop11h 30mIcelandair
Sun 19/1015:45SEA - GLA
1 stop13h 40mIcelandair
Deal found 28/4£673
Sat 11/1006:00GLA - SEA
1 stop18h 05mDelta
Sun 19/1015:30SEA - GLA
2 stops16h 40mDelta
Deal found 28/4£700
Sat 11/1005:50GLA - SEA
2 stops22h 14mBritish Airways
Sun 19/1010:46SEA - GLA
2 stops15h 44mBritish Airways
Deal found 28/4£757
Wed 30/405:50GLA - SEA
1 stop13h 45mAmerican Airlines
Wed 7/520:20SEA - GLA
1 stop17h 20mAmerican Airlines
Deal found 28/4£892
Fri 10/1013:05GLA - SEA
1 stop12h 45mAer Lingus
Fri 17/1001:21SEA - GLA
2 stops22h 44mAer Lingus
Deal found 29/4£922
Wed 30/413:10GLA - SEA
1 stop31h 15mLufthansa
Wed 7/508:10SEA - GLA
2 stops20h 15mLufthansa
Deal found 28/4£962

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 29 April 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

Mon 1/9

06:00-16:00

2 stops18h 00m

Seattle/Tacoma Intl

Mon 15/9

15:30-16:10

2 stops16h 40m

£567

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 1/9

09:05-18:20

1 stop17h 15m

Seattle/Tacoma Intl

Mon 15/9

20:20-18:30

1 stop14h 10m

£582

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 1/9

09:05-18:20

1 stop17h 15m

Seattle/Tacoma Intl

Mon 15/9

13:29-14:40

2 stops17h 11m

£587

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sat 11/10

14:20-17:50

1 stop11h 30m

Seattle/Tacoma Intl

Sun 19/10

15:45-13:25

1 stop13h 40m

£673

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sat 11/10

06:00-16:05

1 stop18h 05m

Seattle/Tacoma Intl

Sun 19/10

15:30-16:10

2 stops16h 40m

£700

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sat 11/10

05:50-20:04

2 stops22h 14m

Seattle/Tacoma Intl

Sun 19/10

10:46-10:30

2 stops15h 44m

£757

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 10/10

13:05-17:50

1 stop12h 45m

Seattle/Tacoma Intl

Fri 17/10

01:21-08:05

2 stops22h 44m

£922

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 26/5

21:50-12:58

3 stops47h 08m

£299

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 1/9

12:00-17:50

1 stop13h 50m

£463

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 15/7

14:20-17:50

1 stop11h 30m

£640

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 12 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 April 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 is the cheapest time of day to fly from GLA to SEA?

Find hourly flight availability from Glasgow Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 April 2025.

One of the essential ways to save on airfare from Glasgow Intl Airport to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 9% on airfare.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 April 2025.
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,929 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,275 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Icelandair
7.0
Good
487 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Aer Lingus
7.0
Good
1,076 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 6 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 KLM. Our recent data shows that you can find tickets from as low as £567 on this airline. Additional options worth looking into are Finnair and Icelandair, starting at £587 and £673 round-trip. Users have found that KLM is 10% cheaper than the other options available to this destination.

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

    £463 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on Icelandair and British Airways, with prices starting from £640 and £686, 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 Glasgow Intl Airport?

Book flights to Glasgow Intl Airport if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell

Browse thousands of different options on Cheapflights for your next trip

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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 6 airlines flying from Glasgow Intl to Seattle

Discover the top 6 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 29 April 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£442Average£629FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£445Average£669FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£456Average£514FlexibilityNo cancel feeOn-time77%
Search Air France flights
LufthansaCheapest£464Average£594FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£482Average£619FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£664Average£855FlexibilityNo 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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