Find flights
When to book

Cheap flights from District of Columbia to Belfast Intl Airport from £493

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BFS
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheap 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 18 September 2025.

Round-trip from

£493

Popular in

June

Cheapest in

February

Average price

£474
28/10-4/11
  • 28/10-4/11
  • 6 total stops
  • 65h 55m total
  • District of Columbia to Belfast
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£104 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from District of Columbia to Belfast Intl

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 18 September 2025.

Tue 28/1018:30IAD - BFS
3 stops23h 00mMultiple Airlines
Tue 4/1107:05BFS - IAD
3 stops42h 55mMultiple Airlines
Deal found 16/9£493
Fri 31/1022:00IAD - BFS
2 stops20h 00mMultiple Airlines
Fri 7/1108:05BFS - IAD
2 stops16h 25mMultiple Airlines
Deal found 16/9£522
Sun 2/1121:00IAD - BFS
2 stops16h 55mMultiple Airlines
Sun 9/1123:05BFS - IAD
2 stops25h 25mMultiple Airlines
Deal found 17/9£530
Sat 1/1118:30IAD - BFS
3 stops22h 55mMultiple Airlines
Sat 8/1123:10BFS - IAD
3 stops45h 05mMultiple Airlines
Deal found 17/9£624
Tue 25/1117:30IAD - BFS
3 stops22h 00mMultiple Airlines
Fri 28/1120:50BFS - IAD
2 stops23h 45mMultiple Airlines
Deal found 15/9£712

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 18 September 2025.
Use the filters below to find and compare flights from District of Columbia to Belfast Intl Airport that are best for you.

Fly from

District of Columbia

Fly to

Belfast Intl

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 31/10

22:00-22:00

2 stops20h 00m

Belfast Intl

Fri 7/11

08:05-19:30

2 stops16h 25m

£522

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 2/11

21:00-18:55

2 stops16h 55m

Belfast Intl

Sun 9/11

23:05-19:30

2 stops25h 25m

£530

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 28/10

20:40-21:50

2 stops21h 10m

Belfast Intl

Tue 4/11

06:30-18:30

2 stops17h 00m

£563

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 1/11

18:30-21:25

3 stops22h 55m

Belfast Intl

Sat 8/11

23:10-15:15

3 stops45h 05m

£624

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 25/11

17:30-20:30

3 stops22h 00m

Belfast Intl

Fri 28/11

20:50-15:35

2 stops23h 45m

£712

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 13/10

20:30-17:20

2 stops15h 50m

Belfast Intl

Sun 26/10

05:45-22:00

3 stops20h 15m

£997

Flights are sorted by cheapest return flights first.

Deals found on 16/9

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.

  • What is the cheapest month to book a flight from District of Columbia to Belfast Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from District of Columbia to Belfast Intl Airport (average of £67). Flying from District of Columbia to Belfast Intl Airport 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

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
Ballymena
Cookstown
Dungannon

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for District of Columbia to Belfast Intl

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Belfast Intl flights
Newark to Belfast Intl flights
John F Kennedy Intl to Belfast City flights
Dallas/Fort Worth to Belfast Intl flights
Los Angeles to Belfast Intl flights
O'Hare Intl to Belfast Intl flights
LaGuardia to Belfast City flights
Los Angeles to Belfast City flights
Seattle to Belfast City flights
Boston to Belfast Intl flights
Boston to Belfast City flights
Hobby to Belfast City flights
Orlando to Belfast Intl flights
San Francisco to Belfast Intl flights
San Francisco to Belfast City flights
Philadelphia to Belfast City flights
George Bush Intcntl to Belfast Intl flights
Atlanta to Belfast Intl flights
State College to Belfast City flights
Orlando to Belfast City flights
Portland to Belfast City flights
Miami to Belfast Intl flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from District of Columbia to Belfast Intl?

Cheapflights helps you search for flights from District of Columbia to Belfast Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

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 Intl from District of Columbia.

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.

Can Cheapflights notify me if prices for flights from District of Columbia to Belfast Intl become cheaper?

Of course! You can now track prices for flights from District of Columbia to Belfast Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.