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Cheap flights from Washington, D.C. to Belfast from £289

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 22/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
28 Apr — 5 May1
1 adult

Cheap flight deals from Washington, D.C. to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Belfast (BF1). 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 23 April 2025.

Round-trip from

£498

One-way from

£289

Popular in

June

Cheapest in

January

Average price

£496
American Airlines
  • American Airlines
  • 2/9-8/9
  • 2 total stops
  • 32h 20m total
  • Washington, D.C. to Belfast
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22/8
  • 22/8
  • 2 total stops
  • 34h 00m total
  • Washington, D.C. to Belfast
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£102 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£19 potential savings vs. average return price).
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Average for round-trip flights in April 2025
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Find flight deals from Washington, D.C. to Belfast

Cheapest flights from Washington, D.C. to Belfast
Explore the most affordable flight options available from Washington, D.C. to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 April 2025.

Tue 2/922:40IAD - BHD
1 stop13h 50mAmerican Airlines
Mon 8/906:40BHD - IAD
1 stop18h 30mAmerican Airlines
Deal found 22/4£498
Tue 2/921:20BWI - BHD
1 stop13h 00mAmerican Airlines
Mon 8/913:50BHD - BWI
1 stop10h 45mAmerican Airlines
Deal found 22/4£498
Tue 2/919:25IAD - BHD
1 stop10h 10mBritish Airways
Mon 8/912:15BHD - IAD
1 stop12h 55mBritish Airways
Deal found 22/4£500
Thu 24/421:20BWI - BHD
1 stop10h 55mBritish Airways
Wed 7/510:00BHD - BWI
1 stop14h 35mBritish Airways
Deal found 22/4£505
Thu 30/1017:52DCA - BHD
2 stops12h 28mBritish Airways
Thu 6/1106:35BHD - DCA
2 stops14h 50mBritish Airways
Deal found 21/4£509
Tue 20/518:50BWI - BFS
2 stops21h 40mMultiple Airlines
Tue 27/507:25BFS - BWI
2 stops15h 15mMultiple Airlines
Deal found 22/4£512
Thu 29/515:30IAD - BFS
2 stops19h 45mMultiple Airlines
Mon 2/621:55BFS - IAD
3 stops27h 55mMultiple Airlines
Deal found 22/4£523
Thu 24/417:25IAD - BHD
1 stop18h 30mVirgin Atlantic
Wed 7/506:30BHD - IAD
1 stop14h 05mVirgin Atlantic
Deal found 22/4£526
Thu 30/1013:00BWI - BHD
2 stops23h 50mDelta
Thu 6/1106:30BHD - BWI
2 stops15h 34mDelta
Deal found 21/4£537
Tue 2/915:00IAD - BHD
2 stops20h 55mDelta
Mon 8/906:30BHD - IAD
2 stops15h 01mDelta
Deal found 22/4£537
Thu 30/1020:40IAD - BHD
2 stops12h 55mMultiple Airlines
Thu 6/1107:10BHD - IAD
2 stops16h 10mMultiple Airlines
Deal found 21/4£595
Thu 24/421:20BWI - BHD
1 stop10h 55mMultiple Airlines
Wed 7/507:05BHD - BWI
3 stops28h 05mMultiple Airlines
Deal found 22/4£614

Cheapflights Fare Finder

Customise your flight search to find flights from Washington, D.C. to Belfast 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 23 April 2025.
Use the filters below to find and compare flights from Washington, D.C. to Belfast that are best for you.

Fly from

Washington, D.C.

Fly to

Belfast

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 2/9

22:40-17:30

1 stop13h 50m

Belfast City

Mon 8/9

06:40-20:10

1 stop18h 30m

£498

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Tue 2/9

21:20-15:20

1 stop13h 00m

Belfast City

Mon 8/9

13:50-19:35

1 stop10h 45m

£498

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 2/9

19:25-10:35

1 stop10h 10m

Belfast City

Mon 8/9

12:15-20:10

1 stop12h 55m

£500

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Tue 2/9

17:29-13:00

2 stops14h 31m

Belfast City

Mon 8/9

09:50-23:50

2 stops19h 00m

£510

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Tue 20/5

18:50-21:30

2 stops21h 40m

Belfast Intl

Tue 27/5

07:25-17:40

2 stops15h 15m

£512

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 29/5

15:30-16:15

2 stops19h 45m

Belfast Intl

Mon 2/6

21:55-20:50

3 stops27h 55m

£523

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Tue 2/9

15:59-10:35

2 stops13h 36m

Belfast City

Mon 8/9

12:15-19:35

1 stop12h 20m

£525

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 2/9

15:00-16:55

2 stops20h 55m

Belfast City

Mon 8/9

06:30-16:31

2 stops15h 01m

£537

Washington, D.C.Belfast

DCA - BFS

DCABFS

Washington, D.C. Reagan-National

Thu 29/5

06:00-16:15

3 stops29h 15m

Belfast Intl

Mon 2/6

08:20-19:43

2 stops16h 23m

£625

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 2/9

17:20-13:00

2 stops14h 40m

Belfast City

Mon 8/9

06:40-15:50

2 stops14h 10m

£657

Flights are sorted by cheapest return flights first.

Deals found on 22/4

Showing 1-10 of 24 results
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Best time to book a flight from Washington, D.C. to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Washington, D.C. 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, D.C. to Belfast

Rainfall in Belfast by month

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

In terms of precipitation, rainfall in Belfast 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 when rainfall is around 50.0 mm.

Temperature in Belfast by month

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

If weather is an important factor for your trip to Belfast, 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

Get insights into the airlines that provide service to Belfast. 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. Reviews last updated 23 April 2025.
To help decide which airline to fly from Washington, D.C. to Belfast, see what other customers have to say about Delta, KLM and Virgin Atlantic. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,920 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

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
7,920 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

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
1,333 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

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.
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

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
7,920 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

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
1,067 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

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, D.C. to Belfast. 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 flying from Washington, D.C. to Belfast round-trip?

    American Airlines, at £498, was found to be the cheapest airline from Washington, D.C. to Belfast.Alternate airlines flying return to your destination include British Airways and Delta. You may be able to fly from Washington, D.C. to Belfast for 11% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Washington, D.C. to Belfast one-way?

    One-way options have recently been found by users for as low as £298 on British Airways. Other airlines that offer cheap prices include Virgin Atlantic from £616 and KLM from £617 one-way.

  • What are the most popular routes from Washington, D.C. to Belfast?

    The most popular flight routes from Washington, D.C. to Belfast are Washington, D.C. Dulles Intl - Belfast Intl, Baltimore/Washington - Belfast Intl and Washington, D.C. Dulles Intl - Belfast City.

  • Can I find deals for flights from Washington, D.C. to Belfast that include hotel bookings?

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

  • How can I find direct flights from Washington, D.C. to Belfast?

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

  • Can I find deals for business class flights from Washington, D.C. to Belfast?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Belfast 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 Washington, D.C. to Belfast?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Belfast (average of £67). Flying from Washington, D.C. to Belfast in July is currently the most expensive (average of £90). 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

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

Complete your trip to Belfast by adding a car hire and/or hotel booking to your travel itinerary.
Belfast car hire
Belfast Intl Airport car hire
Londonderry Eglinton Airport car hire
Isle of Islay Glenegedale Airport car hire
Londonderry car hire

Fly with Cheapflights

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How does Cheapflights help users find flights from Washington, D.C. to Belfast?

Cheapflights makes it easy to find Washington, D.C. to Belfast flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Belfast?

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 Belfast from Washington, D.C..

Can Cheapflights find flights from Washington, D.C. to Belfast with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Washington, D.C. to Belfast, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Washington, D.C. to Belfast become cheaper?

Yes, Cheapflights offers price alerts on Washington, D.C. to Belfast 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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