Latest deals
Insights
FAQs
Price Alerts

Cheap flights from Washington to Belfast from £243

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Belfast departing on 23/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Washington to Belfast

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
13:35 - 14:15
SEA
-
BHD
16h 40m1 stop
British Airways Logo
11:25 - 17:55
BHD
-
SEA
13h 30m1 stop
£449British Airways
Sat, 7 Mar - Tue, 17 Mar
British Airways Logo
18:50 - 19:40
SEA
-
BHD
16h 50m1 stop
British Airways Logo
10:00 - 17:55
BHD
-
SEA
14h 55m1 stop
£452British Airways
Sat, 7 Mar - Tue, 17 Mar
British Airways Logo
17:45 - 14:15
PDX
-
BHD
12h 30m1 stop
British Airways Logo
06:35 - 15:55
BHD
-
PDX
17h 20m1 stop
£452British Airways
Mon, 12 Jan - Mon, 19 Jan
British Airways Logo
17:45 - 08:15
PDX
-
BHD
30h 30m1 stop
British Airways Logo
09:10 - 15:55
BHD
-
PDX
14h 45m1 stop
£455British Airways
Fri, 16 Jan - Sun, 25 Jan
British Airways Logo
07:15 - 16:45
SEA
-
BHD
25h 30m2 stops
British Airways Logo
12:25 - 17:55
BHD
-
SEA
12h 30m1 stop
£464British Airways
Sat, 7 Mar - Wed, 18 Mar
British Airways Logo
06:00 - 14:15
PDX
-
BHD
24h 15m2 stops
British Airways Logo
09:15 - 15:55
BHD
-
PDX
14h 40m1 stop
£464British Airways
Mon, 12 Jan - Mon, 19 Jan
British Airways Logo
07:15 - 16:45
SEA
-
BHD
25h 30m2 stops
British Airways Logo
06:35 - 21:54
BHD
-
SEA
22h 19m2 stops
£466British Airways
Sat, 7 Mar - Wed, 18 Mar
British Airways Logo
06:00 - 14:15
PDX
-
BHD
24h 15m2 stops
British Airways Logo
17:45 - 20:27
BHD
-
PDX
34h 42m2 stops
£466British Airways
Mon, 12 Jan - Mon, 19 Jan
KLM Logo
13:30 - 16:50
PDX
-
BHD
19h 20m2 stops
KLM Logo
17:20 - 19:13
BHD
-
PDX
33h 53m2 stops
£494KLM
Wed, 14 Jan - Wed, 21 Jan
Delta Logo
05:50 - 16:50
PDX
-
BHD
27h 00m2 stops
Delta Logo
17:20 - 18:50
BHD
-
PDX
33h 30m2 stops
£534Delta
Fri, 16 Jan - Sun, 25 Jan

British Airways flights from State of Washington to Belfast City Airport

Our best British Airways deals on State of Washington to Belfast City Airport flight tickets
British Airways
7 Mar
SEA13:35Seattle/Tacoma Intl
13h 35m
1 stop
BHD11:10Belfast City
18 Mar
BHD12:25Belfast City
12h 30m
1 stop
SEA17:55Seattle/Tacoma Intl
£449
Find similar
British Airways
12 Jan
PDX17:45Portland
12h 30m
1 stop
BHD14:15Belfast City
19 Jan
BHD06:35Belfast City
17h 20m
1 stop
PDX15:55Portland
£452
Find similar
British Airways
16 Jan
PDX17:45Portland
30h 30m
1 stop
BHD08:15Belfast City
25 Jan
BHD09:10Belfast City
14h 45m
1 stop
PDX15:55Portland
£455
Find similar

Aer Lingus flights from State of Washington to Belfast City Airport

Our best Aer Lingus deals on State of Washington to Belfast City Airport flight tickets
Aer Lingus
18 Feb
SEA20:05Seattle/Tacoma Intl
16h 10m
2 stops
BHD20:15Belfast City
23 Feb
BHD06:55Belfast City
19h 25m
2 stops
SEA18:20Seattle/Tacoma Intl
£2,762
Find similar
Aer Lingus
18 Feb
SEA18:50Seattle/Tacoma Intl
16h 20m
1 stop
BHD19:10Belfast City
23 Feb
BHD06:55Belfast City
19h 25m
2 stops
SEA18:20Seattle/Tacoma Intl
£2,775
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from State of Washington to Belfast City Airport 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, momondo users made 279,928 searches. Data last updated 16 December 2025.
Use the filters below to find and compare flights from Washington to Belfast City Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

13:35-14:15

1 stop16h 40m

Belfast City

Tue 17/3

11:25-17:55

1 stop13h 30m

£449

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-19:40

1 stop16h 50m

Belfast City

Tue 17/3

10:00-17:55

1 stop14h 55m

£452

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 12/1

17:45-14:15

1 stop12h 30m

Belfast City

Mon 19/1

06:35-15:55

1 stop17h 20m

£452

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 16/1

17:45-08:15

1 stop30h 30m

Belfast City

Sun 25/1

09:10-15:55

1 stop14h 45m

£455

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

07:15-16:45

2 stops25h 30m

Belfast City

Wed 18/3

12:25-17:55

1 stop12h 30m

£464

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 12/1

06:00-14:15

2 stops24h 15m

Belfast City

Mon 19/1

09:15-15:55

1 stop14h 40m

£464

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

07:15-16:45

2 stops25h 30m

Belfast City

Wed 18/3

06:35-21:54

2 stops22h 19m

£466

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 12/1

06:00-14:15

2 stops24h 15m

Belfast City

Mon 19/1

17:45-20:27

2 stops34h 42m

£466

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 14/1

13:30-16:50

2 stops19h 20m

Belfast City

Wed 21/1

17:20-19:13

2 stops33h 53m

£494

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 16/1

05:50-16:50

2 stops27h 00m

Belfast City

Sun 25/1

17:20-18:50

2 stops33h 30m

£534

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

See travel insights to Belfast from

How to get the cheapest flight ticket from State of Washington to Belfast City Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Washington to Belfast City?

British Airways is the most popular carrier operating from Washington to Belfast City

Cheap State of Washington to Belfast City Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Belfast City Airport

Fastest flight time

12h 30m

Direct flights

None
The fastest flight from State of Washington to Belfast City Airport takes 12h 30m
There are no direct flights from State of Washington to Belfast City Airport. There are no popular flight routes from State of Washington to Belfast City Airport.
Search flight deals

  • When did momondo last update prices for flights from Washington to Belfast City Airport?

    Prices for flights from Washington to Belfast City Airport refresh daily.

  • How old do you have to be to fly from Washington to Belfast City Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Belfast City Airport.

  • What documentation or ID do you need to fly to Belfast City Airport?

    The travel and health documents required for your trip to Belfast City Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Belfast City Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Newcastle
Bangor
Carrickfergus

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Belfast?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Belfast from Washington.

Can I find flights from Washington to Belfast with flexible booking policies on momondo?

All flight searches from Washington to Belfast on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington to Belfast?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington to Belfast.

I’m not ready to book a flight from Washington to Belfast right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Belfast, momondo offers a useful price alert feature which will track prices for flights to Belfast from Washington and alert you when they change.

An easier way to manage your Belfast City Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 15/1
Thu 22/1
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Belfast