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Cheap flights from Glasgow Intl Airport to Washington from £306

GLA — SEA
24 Sep — 1 Oct1
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

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
Mon 5/1019:25 -
2 stops33h 15m
Fri 9/1015:40 -
2 stops20h 45m
Deal found 23/8£580
Tue 6/1014:20 -
1 stop11h 35m
Tue 27/1015:35 -
1 stop11h 20m
Deal found 22/8£582
Tue 6/1014:20 -
1 stop11h 35m
Tue 20/1019:00 -
1 stop10h 25m
Deal found 24/8£609
Tue 6/1007:05 -
2 stops21h 35m
Tue 20/1019:00 -
2 stops17h 50m
Deal found 24/8£611
Sat 17/1014:20 -
1 stop11h 35m
Tue 20/1019:00 -
1 stop10h 25m
Deal found 23/8£612
Thu 17/911:00 -
3 stops30h 40m
Sun 4/1015:55 -
3 stops23h 45m
Deal found 24/8£615
Thu 3/921:40 -
2 stops48h 10m
Mon 21/915:30 -
1 stop13h 55m
Deal found 22/8£685
Sat 5/911:00 -
2 stops34h 50m
Mon 21/915:30 -
1 stop13h 55m
Deal found 22/8£697
Wed 2/911:00 -
2 stops34h 50m
Mon 21/915:30 -
1 stop13h 55m
Deal found 22/8£702
Wed 7/1014:20 -
1 stop11h 35m
Wed 14/1015:30 -
1 stop13h 55m
Deal found 23/8£704

Find flight deals from Glasgow Intl to Washington

Round-trip from

£510

One-way from

£306

Popular in

May

Cheapest in

January

Average price

£723
Icelandair
  • Icelandair
  • 3/10-13/10
  • 3 total stops
  • 41h 50m total
  • Glasgow to Washington
Search Deals
9/9
  • 9/9
  • 3 total stops
  • 47h 15m total
  • Glasgow to Washington
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£2 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 Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Tue 6/10

14:20-17:55

1 stop11h 35m

Seattle/Tacoma Intl

Tue 27/10

15:35-09:55

1 stop11h 20m

£601

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Tue 6/10

05:55-11:35

1 stop13h 40m

Seattle/Tacoma Intl

Tue 27/10

15:14-15:50

2 stops17h 36m

£677

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Tue 6/10

14:20-20:40

1 stop14h 20m

Seattle/Tacoma Intl

Sat 10/10

19:00-13:25

1 stop10h 25m

£678

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Thu 17/9

06:00-16:35

1 stop18h 35m

Seattle/Tacoma Intl

Sun 4/10

13:45-16:10

1 stop18h 25m

£683

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

Fri 30/10

08:00-20:15

2 stops19h 15m

Seattle/Tacoma Intl

Mon 2/11

18:45-18:25

1 stop15h 40m

£683

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

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

09:36-12:55

2 stops19h 19m

£698

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Tue 6/10

14:00-21:55

1 stop15h 55m

Seattle/Tacoma Intl

Sat 10/10

07:11-10:10

2 stops18h 59m

£710

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Thu 29/10

05:40-12:47

1 stop14h 07m

Seattle/Tacoma Intl

Sun 1/11

10:37-12:45

2 stops18h 08m

£724

Flights are sorted by cheapest return flights first.

Deals found on 20/8

Showing 1-10 of 29 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

Cheapflights Insights

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

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

Airfare is below average for this route at the moment.
Glasgow Intl Airport to State of Washington flights typically cost between £633 and £797 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 Washington

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
1,723 reviews
Check prices

Entertainment

7.0

Food

6.7

Crew

8.1

Comfort

7.2

Overall

7.3

Boarding

7.5

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
1,723 reviews
Aer Lingus
7.3
Good
1,723 reviews
Check prices

Entertainment

7.0

Food

6.7

Crew

8.1

Comfort

7.2

Overall

7.3

Boarding

7.5

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
736 reviews
Aer Lingus
7.3
Good
1,723 reviews
Check prices

Entertainment

7.0

Food

6.7

Crew

8.1

Comfort

7.2

Overall

7.3

Boarding

7.5

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
8,188 reviews
Aer Lingus
7.3
Good
1,723 reviews
Check prices

Entertainment

7.0

Food

6.7

Crew

8.1

Comfort

7.2

Overall

7.3

Boarding

7.5

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

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

    Airlines like Icelandair, British Airways, and KLM 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 7h. Glasgow Intl Airport and State of Washington are separated by a distance of 4445 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.

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Top 3 airlines flying from Glasgow Intl to Washington

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£443Average£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

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