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Cheap flights from Washington to Belfast City Airport 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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
5 Apr — 12 Apr1
1 adult

Cheap flight deals from Washington to Belfast City

Keep the following information in mind while searching for Washington to Belfast City flight deals. Data was last updated 31 March 2025.

Round-trip from

£530

One-way from

£299

Popular in

June

Cheapest in

October

Average price

£591
British Airways
  • British Airways
  • 7/4-13/4
  • 2 total stops
  • 41h 45m total
  • Washington to Belfast
Search Deals
4/5
  • 4/5
  • 3 total stops
  • 46h 19m total
  • Washington to Belfast
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£119 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£32 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from Washington to Belfast City

Cheapest flights from Washington to Belfast City
Explore the most affordable flight options available from Washington to Belfast City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 March 2025.

Tue 28/1019:50SEA - BHD
1 stop12h 05mMultiple Airlines
Tue 4/1106:35BHD - SEA
1 stop12h 45mMultiple Airlines
Deal found 31/3£581
Mon 21/413:57PDX - BHD
2 stops21h 38mBritish Airways
Sun 27/420:05BHD - PDX
2 stops34h 57mBritish Airways
Deal found 30/3£584
Tue 28/1015:13SEA - BHD
2 stops16h 42mAmerican Airlines
Tue 4/1106:35BHD - SEA
1 stop18h 20mAmerican Airlines
Deal found 31/3£591
Wed 30/420:20SEA - BHD
1 stop16h 25mBritish Airways
Mon 12/519:30BHD - SEA
1 stop23h 40mBritish Airways
Deal found 31/3£610
Mon 21/414:58PDX - BHD
2 stops16h 42mAmerican Airlines
Sat 26/407:05BHD - PDX
2 stops20h 49mAmerican Airlines
Deal found 30/3£673
Sun 4/507:10SEA - BHD
2 stops30h 05mDelta
Mon 12/517:25BHD - SEA
1 stop26h 15mDelta
Deal found 31/3£710
Thu 15/514:10SEA - BHD
1 stop23h 05mKLM
Thu 22/506:30BHD - SEA
1 stop13h 10mKLM
Deal found 31/3£726
Sun 11/518:45SEA - BHD
2 stops18h 10mAer Lingus
Sun 18/518:00BHD - SEA
2 stops30h 59mAer Lingus
Deal found 31/3£761
Mon 21/413:15PDX - BHD
1 stop24h 00mKLM
Sat 26/406:30BHD - PDX
1 stop12h 50mKLM
Deal found 30/3£815
Sun 4/506:08SEA - BHD
2 stops21h 22mFinnair
Mon 12/519:30BHD - SEA
2 stops35h 39mFinnair
Deal found 31/3£823
Sat 3/508:30SEA - BHD
2 stops24h 45mIberia
Sun 11/506:50BHD - SEA
2 stops19h 56mIberia
Deal found 31/3£852

Cheapflights Fare Finder

Customise your flight search to find flights from Washington to Belfast City 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 31 March 2025.
Use the filters below to find and compare flights from Washington to Belfast City Airport that are best for you.

Fly from

Washington

Fly to

Belfast City

Route

Depart

Return

Price

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 7/4

19:25-15:40

1 stop12h 15m

Belfast City

Sun 13/4

20:05-17:35

1 stop29h 30m

£530

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 7/4

14:58-17:30

2 stops18h 32m

Belfast City

Sun 13/4

11:00-23:02

2 stops20h 02m

£537

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 30/4

20:20-20:45

1 stop16h 25m

Belfast City

Mon 12/5

19:30-11:10

1 stop23h 40m

£610

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 2/5

13:35-15:30

2 stops17h 55m

Belfast City

Sun 11/5

15:50-11:35

1 stop27h 45m

£627

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 4/5

07:10-21:15

2 stops30h 05m

Belfast City

Mon 12/5

17:25-11:40

1 stop26h 15m

£710

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 15/5

15:45-17:20

2 stops17h 35m

Belfast City

Thu 22/5

07:05-00:10

3 stops25h 05m

£725

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 15/5

14:10-21:15

1 stop23h 05m

Belfast City

Thu 22/5

06:30-11:40

1 stop13h 10m

£726

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 11/5

18:45-20:55

2 stops18h 10m

Belfast City

Sun 18/5

18:00-16:59

2 stops30h 59m

£761

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 21/4

13:15-21:15

1 stop24h 00m

Belfast City

Sat 26/4

06:30-11:20

1 stop12h 50m

£815

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 4/5

06:08-11:30

2 stops21h 22m

Belfast City

Mon 12/5

19:30-23:09

2 stops35h 39m

£823

Flights are sorted by cheapest return flights first.

Deals found on 31/3

Showing 1-10 of 18 results
1
2

Best time to book a flight from Washington to Belfast City

Have a flexible travel schedule? Discover the best time to fly to Belfast City from Washington 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 Washington to Belfast City Airport

Rainfall in Belfast City by month

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

In terms of precipitation, rainfall in Belfast City Airport ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast City Airport when rainfall is around 50.0 mm.

Temperature in Belfast City by month

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

If weather is an important factor for your trip to Belfast City Airport, 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 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Belfast City

Get insights into the airlines that provide service to Belfast City. 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 Belfast City. Reviews last updated 31 March 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair from Washington to Belfast. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,899 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,061 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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

  • What are the cheapest airlines to fly from State of Washington to Belfast City Airport one-way?

    The cheapet airlines for a one-way flight from State of Washington to Belfast City Airport are Aer Lingus (£342), American Airlines (£350), and Iberia (£352).

  • Can I find deals for flights from Washington to Belfast City that include hotel bookings?

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

  • How can I find direct flights from Washington to Belfast City?

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

  • Can I find deals for business class flights from Washington to Belfast City?

    Yes. Cheapflights offers flight deals from Washington to Belfast City 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 State of Washington to Belfast City Airport?

    Currently, April is the cheapest month in which you can book a flight from State of Washington to Belfast City Airport (average of £98). Flying from State of Washington to Belfast City Airport in December is currently the most expensive (average of £116). 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 Washington?

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

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Alternative routes for Washington to Belfast City

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Why should you use Cheapflights to find cheap flight tickets from Washington to Belfast City?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Washington to Belfast City for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Washington to Belfast City with no change fees?

Certainly. Search results for flights to Belfast City from Washington shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Washington to Belfast City become cheaper?

Yes, Cheapflights offers price alerts on Washington to Belfast City 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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