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Cheap flights from District of Columbia to Belfast Intl Airport from £317

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BFS
14 Sep — 21 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from District of Columbia to Belfast Intl

Enter your travel dates to find the best prices.

Cheapest flights from District of Columbia to Belfast Intl
Explore the most affordable flight options available from District of Columbia to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2026.

Tue 22/920:30 -
2 stops18h 10m
Tue 29/917:10 -
3 stops34h 05m
Deal found 11/8£574
Tue 29/916:00 -
2 stops22h 50m
Tue 6/1008:50 -
3 stops36h 15m
Deal found 15/8£591
Tue 22/911:00 -
2 stops27h 50m
Tue 29/908:20 -
2 stops16h 39m
Deal found 13/8£605
Sun 27/923:20 -
2 stops16h 40m
Sun 4/1022:10 -
3 stops25h 50m
Deal found 13/8£611
Wed 23/917:45 -
2 stops20h 55m
Wed 30/908:15 -
2 stops35h 55m
Deal found 11/8£631
Sun 11/1009:45 -
3 stops27h 40m
Sat 17/1020:15 -
3 stops47h 55m
Deal found 11/8£636
Wed 23/906:59 -
2 stops27h 56m
Wed 30/908:50 -
2 stops16h 09m
Deal found 11/8£689

Find flight deals from District of Columbia to Belfast Intl

Keep the following information in mind while searching for District of Columbia to Belfast Intl flight deals. Data was last updated 15 August 2026.

Round-trip from

£574

One-way from

£264
22/9-29/9
  • 22/9-29/9
  • 5 total stops
  • 52h 15m total
  • District of Columbia to Belfast
Search Deals
13/9
  • 13/9
  • 2 total stops
  • 20h 00m total
  • District of Columbia to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from District of Columbia to Belfast Intl 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 15 August 2026.
Use the filters below to find and compare flights from District of Columbia to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Tue 22/9

20:30-19:40

2 stops18h 10m

Belfast Intl

Tue 29/9

17:10-22:15

3 stops34h 05m

£574

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Tue 29/9

16:00-19:50

2 stops22h 50m

Belfast Intl

Tue 6/10

08:50-16:05

3 stops36h 15m

£591

Washington, D.C.Belfast

DCA Washington, D.C. Reagan-National - BFS Belfast Intl

DCABFS

Washington, D.C. Reagan-National

Tue 22/9

12:55-19:50

3 stops25h 55m

Belfast Intl

Tue 29/9

08:20-22:34

2 stops19h 14m

£606
Fastest return journey

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Sun 27/9

23:20-21:00

2 stops16h 40m

Belfast Intl

Sun 4/10

22:10-19:00

3 stops25h 50m

£611

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Sun 11/10

23:20-21:00

2 stops16h 40m

Belfast Intl

Sat 17/10

20:15-15:10

3 stops47h 55m

£611

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Wed 23/9

17:45-19:40

2 stops20h 55m

Belfast Intl

Wed 30/9

08:15-15:10

2 stops35h 55m

£631

Washington, D.C.Belfast

DCA Washington, D.C. Reagan-National - BFS Belfast Intl

DCABFS

Washington, D.C. Reagan-National

Wed 23/9

06:00-15:55

3 stops28h 55m

Belfast Intl

Wed 30/9

08:50-19:59

2 stops16h 09m

£692
Cheapest one-way
Fastest single journey

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Thu 3/9

20:30-10:45

3 stops33h 15m

£325

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Sorted by cheapest first

Best time to book a flight from District of Columbia to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from District of Columbia 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 District of Columbia to Belfast Intl Airport

No data available for this route at this time. Please check back soon.

Related info for your journey

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

  • Can I find deals for flights from District of Columbia to Belfast Intl that include hotel bookings?

    Yes. In addition to deals on District of Columbia to Belfast Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from District of Columbia to Belfast Intl?

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

  • Can I find deals for business class flights from District of Columbia to Belfast Intl?

    Yes. Cheapflights offers flight deals from District of Columbia to Belfast Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Travelling to a place near Belfast Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Armagh
Newry

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Why should you use Cheapflights to find cheap flight tickets from District of Columbia to Belfast Intl?

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Can Cheapflights find flights from District of Columbia to Belfast Intl with no change fees?

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

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