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Cheap flights from Glasgow Intl Airport to Washington from £333

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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — SEA
12 Aug — 19 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Glasgow Intl to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Glasgow Intl to Washington
Explore the most affordable flight options available from Glasgow Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 July 2026.

Sun 23/821:25
GLA
-
SEA
3 stops31h 35m
Multiple Airlines
Mon 31/819:00
SEA
-
GLA
1 stop10h 25m
Multiple Airlines
Deal found 12/7£604
Thu 1/1014:20
GLA
-
SEA
1 stop14h 20m
Icelandair
Tue 6/1019:00
SEA
-
GLA
1 stop10h 25m
Icelandair
Deal found 11/7£604
Fri 4/921:25
GLA
-
SEA
3 stops31h 35m
Multiple Airlines
Fri 18/915:40
SEA
-
GLA
1 stop13h 45m
Multiple Airlines
Deal found 9/7£605
Mon 28/1211:55
GLA
-
SEA
1 stop13h 05m
Icelandair
Tue 5/114:35
SEA
-
GLA
1 stop11h 20m
Icelandair
Deal found 12/7£613
Thu 1/1008:35
GLA
-
SEA
2 stops18h 10m
Multiple Airlines
Tue 6/1019:00
SEA
-
GLA
1 stop10h 25m
Multiple Airlines
Deal found 11/7£621
Sun 23/814:20
GLA
-
SEA
1 stop29h 25m
Icelandair
Mon 31/819:00
SEA
-
GLA
1 stop10h 25m
Icelandair
Deal found 12/7£636
Mon 28/1206:35
GLA
-
SEA
2 stops18h 25m
Multiple Airlines
Tue 5/114:35
SEA
-
GLA
2 stops20h 25m
Multiple Airlines
Deal found 12/7£639
Mon 14/908:35
GLA
-
PDX
2 stops32h 56m
Multiple Airlines
Thu 24/915:30
PDX
-
GLA
1 stop13h 55m
Multiple Airlines
Deal found 12/7£647
Wed 16/914:20
GLA
-
PDX
1 stop11h 35m
Icelandair
Wed 30/915:30
PDX
-
GLA
1 stop13h 55m
Icelandair
Deal found 9/7£721
Mon 14/906:00
GLA
-
PDX
1 stop13h 10m
Air France
Thu 24/913:05
PDX
-
GLA
1 stop19h 05m
Air France
Deal found 12/7£762
Wed 30/907:30
GLA
-
PDX
2 stops20h 06m
British Airways
Mon 5/1019:30
PDX
-
GLA
1 stop15h 10m
British Airways
Deal found 9/7£776
Wed 30/906:00
GLA
-
PDX
1 stop13h 10m
KLM
Mon 5/1013:05
PDX
-
GLA
1 stop15h 50m
KLM
Deal found 10/7£777

Find flight deals from Glasgow Intl to Washington

Keep the following information in mind while searching for Glasgow Intl to Washington flight deals. Data was last updated 13 July 2026.

Round-trip from

£604

One-way from

£333

Popular in

July

Cheapest in

January

Average price

£746

Good one-way deal

£271 or less
Icelandair
  • Icelandair
  • 23/8-31/8
  • 4 total stops
  • 42h 00m total
  • Glasgow to Washington
Search Deals
13/9
  • 13/9
  • 3 total stops
  • 58h 42m total
  • Glasgow to Washington
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£64 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a one-way flight from Glasgow Intl to Washington.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Glasgow Intl to Washington 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 13 July 2026.
Use the filters below to find and compare flights from Glasgow Intl Airport to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 28/12

06:35-17:00

2 stops18h 25m

Seattle/Tacoma Intl

Tue 5/1

14:35-19:00

2 stops20h 25m

£639

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sun 23/8

08:35-10:05

3 stops33h 30m

Seattle/Tacoma Intl

Tue 8/9

23:25-13:25

1 stop30h 00m

£648

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 6/10

05:55-11:35

1 stop13h 40m

Seattle/Tacoma Intl

Tue 27/10

15:20-15:50

2 stops17h 30m

£668

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 18/8

08:20-17:10

1 stop16h 50m

Seattle/Tacoma Intl

Tue 25/8

19:10-22:10

1 stop19h 00m

£671
Fastest return journey

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Wed 2/9

14:20-17:55

1 stop11h 35m

Seattle/Tacoma Intl

Mon 21/9

19:00-13:25

1 stop10h 25m

£682

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 7/9

14:20-17:55

1 stop11h 35m

Seattle/Tacoma Intl

Thu 17/9

19:00-13:25

1 stop10h 25m

£682

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Sat 17/10

06:00-16:57

2 stops18h 57m

Seattle/Tacoma Intl

Tue 20/10

13:40-16:10

2 stops18h 30m

£691

GlasgowPortland

GLA - PDX

GLAPDX

Glasgow Intl

Wed 30/9

07:30-19:36

2 stops20h 06m

Portland

Mon 5/10

19:30-18:40

1 stop15h 10m

£776

GlasgowPortland

GLA - PDX

GLAPDX

Glasgow Intl

Wed 30/9

06:00-16:05

2 stops18h 05m

Portland

Mon 5/10

06:00-12:55

2 stops22h 55m

£780

GlasgowPortland

GLA - PDX

GLAPDX

Glasgow Intl

Wed 16/9

06:00-17:31

2 stops19h 31m

Portland

Wed 30/9

11:20-16:10

2 stops20h 50m

£783

Flights are sorted by cheapest return flights first.

Deals found on 13/7

Showing 1-10 of 30 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Glasgow Intl to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington 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 Washington

What is the cheapest month to book a flight from Glasgow Intl Airport to State of Washington?

Currently, March is the cheapest month in which you can book a flight from Glasgow Intl Airport to State of Washington (average of £430). Flying from Glasgow Intl Airport to State of Washington in February is currently the most expensive (average of £545). 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.

How much does it cost for a return flight from Glasgow Intl Airport to State of Washington?

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated 13 July 2026.
Read through reviews of airlines operating flights from Glasgow Intl Airport to Washington, such as Aer Lingus,Icelandair, andBritish Airways. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,658 reviews
Check prices

Boarding

7.4

Comfort

7.2

Overall

7.3

Entertainment

7.0

Food

6.7

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
1,658 reviews
Aer Lingus
7.3
Good
1,658 reviews
Check prices

Boarding

7.4

Comfort

7.2

Overall

7.3

Entertainment

7.0

Food

6.7

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
7.0
Good
704 reviews
Aer Lingus
7.3
Good
1,658 reviews
Check prices

Boarding

7.4

Comfort

7.2

Overall

7.3

Entertainment

7.0

Food

6.7

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
8,103 reviews
Aer Lingus
7.3
Good
1,658 reviews
Check prices

Boarding

7.4

Comfort

7.2

Overall

7.3

Entertainment

7.0

Food

6.7

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

Find useful and relevant information for your journey from Glasgow Intl to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Glasgow Intl Airport to State of Washington?

    Airlines like British Airways, Icelandair, and Air France fly from Glasgow Intl Airport to State of Washington in about 11h 35m. The time it takes to get you to your destination can typically vary by up to 2h 05m. Glasgow Intl Airport and State of Washington are separated by a distance of 4560 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Glasgow Intl Airport to State of Washington?

    While some choose either Glasgow Intl - Portland or Glasgow Intl - Yakima Air Terminal, Glasgow Intl - Seattle/Tacoma Intl is the most popular route from Glasgow Intl Airport to State of Washington.

  • Can I find deals for flights from Glasgow Intl to Washington that include hotel bookings?

    Yes. In addition to deals on Glasgow Intl to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Glasgow Intl to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Glasgow Intl to Washington.

  • Can I find deals for business class flights from Glasgow Intl to Washington?

    Yes. Cheapflights offers flight deals from Glasgow Intl to Washington 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 State of Washington?

    Currently, March is the cheapest month in which you can book a flight from Glasgow Intl Airport to State of Washington (average of £430). Flying from Glasgow Intl Airport to State of Washington in February is currently the most expensive (average of £545). 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

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Alternative routes for Glasgow Intl to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Glasgow Intl to Washington

Discover the top 3 airlines that operate flights from Glasgow Intl to Washington. 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 13 July 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£450Average£615FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£544Average£762FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£605Average£762FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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How does Cheapflights help users find flights from Glasgow Intl to Washington?

Deals for Glasgow Intl to Washington flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Glasgow Intl to Washington?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington from Glasgow Intl.

Can Cheapflights find flights from Glasgow Intl to Washington with no change fees?

Yes, we can. To see specific flights from Glasgow Intl to Washington with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Glasgow Intl to Washington become cheaper?

Yes, Cheapflights offers price alerts on Glasgow Intl to Washington 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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