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Belfast Intl

$729+ Cheap flights from Reagan-National (DCA) to Belfast Intl (BFS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — BFS
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
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Cheap flight deals from Reagan-National to Belfast Intl

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Belfast Intl (BFS). 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 August 16, 2025.

Round-trip from

$729
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$618
From Washington, D.C. Reagan-National to Belfast Intl
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Highest demand for flights based on searches. 22% potential increase in price ($217 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Reagan-National to Belfast Intl

Cheapest flights from Reagan-National to Belfast Intl
Explore the most affordable flight options available from Reagan-National to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

This Trip.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/12:55 pmDCA - BFS
2 stops18h 25mMultiple Airlines
Mon 9/158:15 pmBFS - DCA
2 stops32h 26mMultiple Airlines
Deal found 8/13$729

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National 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 2,558,603 searches. Data last updated August 16, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Belfast Intl Airport that are best for you.

Fly from

Reagan-National

Fly to

Belfast Intl

Route

Depart

Return

Price

Washington, D.C.Belfast

DCA - BFS

DCABFS

Washington, D.C. Reagan-National

Mon 9/1

2:55 pm-2:20 pm

2 stops18h 25m

Belfast Intl

Mon 9/15

8:15 pm-11:41 pm

2 stops32h 26m

$729

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Best time to book a flight from Reagan-National to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from Reagan-National with our price prediction graph.
Estimated round-trip 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.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National 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 Reagan-National to Belfast Intl that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Belfast Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Belfast Intl?

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

  • Can I find deals for business class flights from Reagan-National to Belfast Intl?

    Yes. Cheapflights offers flight deals from Reagan-National 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 Washington, D.C. Reagan-National Airport to Belfast Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Belfast Intl Airport (average of $657). Flying from Washington, D.C. Reagan-National Airport to Belfast Intl Airport in June is currently the most expensive (average of $1,189). 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.

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