In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C., 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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

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

What is the cheapest time of day to fly from BFS to WAS?

When flying from Belfast Intl Airport to Washington, D.C., the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

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

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

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

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

£410+ Cheap Flights from Belfast Intl Airport to Washington, D.C.

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

Enter your travel dates to find the best prices.

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Cheapest flights from Belfast Intl to Washington, D.C.
Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 September 2026.

Mon 2/1106:30 -

2 stops17h 50m

Mon 9/1118:40 -

2 stops21h 35m

Deal found 18/9£599

Mon 2/1108:40 -

2 stops14h 38m

Mon 9/1116:00 -

3 stops22h 10m

Deal found 18/9£642

Mon 2/1108:30 -

2 stops15h 10m

Mon 9/1119:40 -

2 stops18h 30m

Deal found 18/9£663

Fri 9/1006:05 -

3 stops35h 04m

Mon 12/1006:00 -

3 stops29h 15m

Deal found 16/9£876

Find flight deals from Belfast Intl to Washington, D.C.

Round-trip from	£599
One-way from	£410

2/11-9/11
4 total stops
39h 25m total
Belfast to Washington, D.C.

Search Deals

8/10-31/12
3 total stops
39h 00m total
Belfast to Washington, D.C.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Belfast Intl Airport to Washington, D.C. that are best for you.

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Route

Depart

Return

Price

Cheapest return flight

BelfastWashington, D.C.

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

BFSIAD

Belfast Intl

Thu 8/10

09:00-19:00

3 stops39h 00m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£410

BelfastWashington, D.C.

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

BFSIAD

Belfast Intl

Fri 2/10

22:15-19:00

3 stops49h 45m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£422

BelfastBaltimore

BFS Belfast Intl - BWI Baltimore/Washington

BFSBWI

Belfast Intl

Fri 2/10

19:55-22:15

2 stops31h 20m

Baltimore/Washington

Wed 31/12

00:00-06:00

Nonstop0h 00m

£441

Fastest return journey

BelfastBaltimore

BFS Belfast Intl - BWI Baltimore/Washington

BFSBWI

Belfast Intl

Thu 8/10

09:15-22:15

2 stops18h 00m

Baltimore/Washington

Wed 31/12

00:00-06:00

Nonstop0h 00m

£443

BelfastWashington, D.C.

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

BFSDCA

Belfast Intl

Fri 2/10

07:05-22:34

2 stops20h 29m

Washington, D.C. Reagan-National

Wed 31/12

00:00-06:00

Nonstop0h 00m

£524

BelfastWashington, D.C.

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

BFSIAD

Belfast Intl

Mon 2/11

06:30-19:20

2 stops17h 50m

Washington, D.C. Dulles Intl

Mon 9/11

18:40-21:15

2 stops21h 35m

£599

BelfastWashington, D.C.

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

BFSDCA

Belfast Intl

Mon 2/11

08:40-18:18

2 stops14h 38m

Washington, D.C. Reagan-National

Mon 9/11

16:00-19:10

3 stops22h 10m

£642

BelfastBaltimore

BFS Belfast Intl - BWI Baltimore/Washington

BFSBWI

Belfast Intl

Mon 2/11

08:30-18:40

2 stops15h 10m

Baltimore/Washington

Mon 9/11

19:40-19:10

2 stops18h 30m

£663

BelfastWashington, D.C.

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

BFSDCA

Belfast Intl

Thu 8/10

06:10-19:59

2 stops18h 49m

Washington, D.C. Reagan-National

Wed 31/12

00:00-06:00

Nonstop0h 00m

£690

BelfastWashington, D.C.

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

BFSDCA

Belfast Intl

Fri 9/10

06:05-12:09

3 stops35h 04m

Washington, D.C. Reagan-National

Mon 12/10

06:00-16:15

3 stops29h 15m

£876

Flights are sorted by cheapest return flights first.

Deals found on 17/9

Sorted by cheapest first

Best time to book a flight from Belfast Intl to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Belfast Intl with our price prediction graph.

BFS-WAS

BFS-IAD

BFS-BWI

BFS-DCA

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 Belfast Intl Airport to Washington, D.C.

BFS-WAS

BFS-IAD

BFS-BWI

BFS-DCA

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

Related info for your journey

What are the most popular routes from Belfast Intl Airport to Washington, D.C.?
The most popular flight routes from Belfast Intl Airport to Washington, D.C. are Belfast Intl - Baltimore/Washington, Belfast Intl - Washington, D.C. Reagan-National and Belfast Intl - Washington, D.C. Dulles Intl.
Can I find deals for flights from Belfast Intl to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Belfast Intl to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Belfast Intl to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to Washington, D.C..
Can I find deals for business class flights from Belfast Intl to Washington, D.C.?
Yes. Cheapflights offers flight deals from Belfast Intl to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Cheap flights from Belfast Intl Airport to Washington, D.C. from £410

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel.

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

Cheapest flights from Belfast Intl to Washington, D.C.Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 September 2026.

Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 September 2026.

Best flights from Belfast Intl to Washington, D.C.Discover carefully curated flight deals from Belfast Intl to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 September 2026.

Discover carefully curated flight deals from Belfast Intl to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 September 2026.

Last-minute flights from Belfast Intl to Washington, D.C.Discover last-minute flight deals from Belfast Intl to Washington, D.C.. Data last updated 20 September 2026 and is based on user searches.

Discover last-minute flight deals from Belfast Intl to Washington, D.C.. Data last updated 20 September 2026 and is based on user searches.

One-way flights from Belfast Intl to Washington, D.C.Search for one-way flight options from Belfast Intl to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 20 September 2026.

Search for one-way flight options from Belfast Intl to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 20 September 2026.

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Best time to book a flight from Belfast Intl to Washington, D.C.

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Related info for your journey

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

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

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

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

Travelling to a place near Washington, D.C.?

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Alternative routes for Belfast Intl to Washington, D.C.

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Direct flights to United States

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Search flights from Belfast Intl to Washington, D.C. by cabin class

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Belfast Intl and Washington, D.C. flights

Browse other Belfast Intl and Washington, D.C. flight options. Last updated on 20 September 2026.

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Belfast Intl to Washington, D.C. flights

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

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

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Cheapest flights from Belfast Intl to Washington, D.C.
Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 September 2026.

Best flights from Belfast Intl to Washington, D.C.
Discover carefully curated flight deals from Belfast Intl to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 September 2026.

Last-minute flights from Belfast Intl to Washington, D.C.
Discover last-minute flight deals from Belfast Intl to Washington, D.C.. Data last updated 20 September 2026 and is based on user searches.

One-way flights from Belfast Intl to Washington, D.C.
Search for one-way flight options from Belfast Intl to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 20 September 2026.