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Cheap flights from Glasgow Intl Airport to Seattle from £377

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 18/3. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — SEA
16 Mar — 23 Mar1
1 adult

The best prices from Glasgow Intl to Seattle/Tacoma Intl are usually found in February or January, 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 11 March 2025.

Round-trip from

£522

One-way from

£377

Popular in

August

Cheapest in

February

Average price

£600
British Airways
  • British Airways
  • 22/4-28/4
  • 3 total stops
  • 39h 20m total
  • Glasgow to Seattle
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18/3
  • 18/3
  • 3 total stops
  • 56h 28m total
  • Glasgow to Seattle
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£65 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 11 March 2025.

Tue 22/421:20GLA - SEA
1 stop22h 15mBritish Airways
Mon 28/413:35SEA - GLA
2 stops17h 05mBritish Airways
Deal found 10/3£522
Tue 22/416:55GLA - SEA
1 stop26h 50mKLM
Mon 28/418:10SEA - GLA
1 stop14h 00mKLM
Deal found 10/3£530
Tue 22/406:00GLA - SEA
2 stops18h 45mMultiple Airlines
Mon 28/418:10SEA - GLA
1 stop30h 00mMultiple Airlines
Deal found 10/3£539
Tue 22/406:00GLA - SEA
2 stops20h 39mDelta
Mon 28/406:05SEA - GLA
2 stops18h 05mDelta
Deal found 10/3£559
Fri 28/312:35GLA - SEA
1 stop31h 35mLufthansa
Wed 9/414:15SEA - GLA
1 stop14h 10mLufthansa
Deal found 11/3£677
Fri 18/714:20GLA - SEA
1 stop14h 20mIcelandair
Thu 31/715:45SEA - GLA
1 stop13h 40mIcelandair
Deal found 11/3£2,542

Find flights from Glasgow Intl to Seattle within your budget

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 11 March 2025.

Fly from

Glasgow Intl

Fly to

Seattle

Route

Depart

Return

Price

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 22/4

21:20-11:35

1 stop22h 15m

Seattle/Tacoma Intl

Mon 28/4

13:35-14:40

2 stops17h 05m

£522

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 22/4

16:55-11:45

1 stop26h 50m

Seattle/Tacoma Intl

Mon 28/4

18:10-16:10

1 stop14h 00m

£530

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 22/4

06:00-16:45

2 stops18h 45m

Seattle/Tacoma Intl

Mon 28/4

18:10-08:10

1 stop30h 00m

£539

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 22/4

06:00-18:39

2 stops20h 39m

Seattle/Tacoma Intl

Mon 28/4

06:05-08:10

2 stops18h 05m

£559

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 28/3

12:35-13:10

1 stop31h 35m

Seattle/Tacoma Intl

Wed 9/4

14:15-12:25

1 stop14h 10m

£677

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Fri 18/7

14:20-20:40

1 stop14h 20m

Seattle/Tacoma Intl

Thu 31/7

15:45-13:25

1 stop13h 40m

£2,542

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 18/3

09:00-10:28

3 stops56h 28m

£377

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Thu 3/7

08:35-16:59

1 stop16h 24m

£573

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sat 19/4

06:55-11:35

1 stop12h 40m

£663

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 15/7

13:35-18:20

1 stop12h 45m

£790

Flights are sorted by cheapest return flights first.

Deals found on 10/3

Showing 1-10 of 13 results
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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.

Travel insights for flights from Glasgow Intl to Seattle

Get recent, data-driven insights about flights from Glasgow Intl to Seattle including ideal travel times, pricing trends, and more.

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 7 March 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 11 March 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 11 March 2025.
Delta
8.0
Very Good
7,973 reviews
Check prices

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

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
7,973 reviews
Delta
8.0
Very Good
7,973 reviews
Check prices

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

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
1,320 reviews
Delta
8.0
Very Good
7,973 reviews
Check prices

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

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
477 reviews
Delta
8.0
Very Good
7,973 reviews
Check prices

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

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
1,064 reviews
Delta
8.0
Very Good
7,973 reviews
Check prices

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

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

Iberia
7.0
Good
2,644 reviews
Delta
8.0
Very Good
7,973 reviews
Check prices

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

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 British Airways. Our recent data shows that you can find tickets from as low as £522 on this airline. Additional options worth looking into are KLM and Delta, starting at £530 and £559 round-trip. Users have found that British Airways is 20% cheaper than the other options available to this destination.

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

    £573 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 British Airways and Iberia, with prices starting from £663 and £790, 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

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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 11 March 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£458Average£651FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£465Average£724FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£470Average£621FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£472Average£532FlexibilityNo cancel feeOn-time77%
Search Air France flights
LufthansaCheapest£480Average£615FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aer LingusCheapest£683Average£885FlexibilityNo 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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