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 - Washington, D.C. Reagan-National, Belfast Intl - Baltimore/Washington 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.

£327+ 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.

Cheapest

Best

Last-minute

One-way

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 6 March 2026.

Mon 20/409:10

BFS

IAD

2 stops35h 00m

Multiple Airlines

Mon 27/420:30

IAD

BFS

3 stops21h 50m

Multiple Airlines

Deal found 6/3£609

Mon 20/406:10

BFS

BWI

3 stops32h 05m

Multiple Airlines

Mon 27/420:30

BWI

BFS

3 stops21h 50m

Multiple Airlines

Deal found 6/3£641

Sat 7/323:10

BFS

IAD

3 stops24h 35m

Multiple Airlines

Wed 11/319:05

IAD

BFS

2 stops20h 15m

Multiple Airlines

Deal found 4/3£751

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.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Mon 20/4

09:10-15:10

2 stops35h 00m

Washington, D.C. Dulles Intl

Mon 27/4

20:30-23:20

3 stops21h 50m

£609

Fastest return journey

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Mon 20/4

06:10-09:15

3 stops32h 05m

Baltimore/Washington

Mon 27/4

20:30-23:20

3 stops21h 50m

£641

Cheapest one-way

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Sun 10/5

22:00-19:25

3 stops50h 25m

£327

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Tue 11/8

16:40-19:15

3 stops31h 35m

£378

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Thu 6/8

06:40-19:15

3 stops41h 35m

£400

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Mon 10/8

17:35-19:35

2 stops31h 00m

£405

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Fri 7/8

19:20-19:00

2 stops28h 40m

£429

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sat 8/8

22:25-19:15

3 stops25h 50m

£502

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Tue 17/3

20:55-22:00

3 stops29h 05m

£574

Fastest single journey

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Wed 18/3

08:20-19:30

2 stops15h 10m

£796

Flights are sorted by cheapest return flights first.

Deals found on 3/3

Showing 1-10 of 11 resultsSorted 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

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

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 - Washington, D.C. Reagan-National, Belfast Intl - Baltimore/Washington 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.

See more FAQs

Silver Spring

Hanover

Oxon Hill

Woodbridge

Arlington

Alexandria

College Park

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to United States

Flights by cabin class

Other flight options

Other flights from Belfast Intl

Popular flights

Top destinations

Washington, D.C. flight routes

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

Belfast City to Reagan-National flights

Belfast Intl to Dulles Intl flights

Belfast City to Dulles Intl flights

Fly with Cheapflights

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

When you search for this flight from Belfast Intl to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from Belfast Intl to Washington, D.C. by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Yes, we can. To see specific flights from Belfast Intl to Washington, D.C. 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 Belfast Intl to Washington, D.C. become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington, D.C. from Belfast Intl today and book when prices fit your budget.

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.

Cheap flights from Belfast Intl Airport to Washington, D.C. from £327

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 10/5. 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 6 March 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 6 March 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 6 March 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 6 March 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 6 March 2026 and is based on user searches.

Discover last-minute flight deals from Belfast Intl to Washington, D.C.. Data last updated 6 March 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 6 March 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 6 March 2026.

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.

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.

Cheapflights Insights

Everything you need to know about your flight from Belfast Intl Airport to Washington, D.C.

Related info for your journey

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

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.?

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 Belfast Intl to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Washington, D.C. by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

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

Find flights from Belfast Intl to Washington, D.C., based on your preferred cabin class, be it economy, premium economy, business, or first class.

Belfast Intl and Washington, D.C. flights

Browse other Belfast Intl and Washington, D.C. flight options. Last updated on 6 March 2026.

Other flights from Belfast Intl

Browse through other flights departing from Belfast Intl. Flights are based on user searches made on Cheapflights and were last updated on 6 March 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Belfast Intl to Washington, D.C. flights

Consider these flights travelling from Belfast Intl to Washington, D.C..

Other flights to Washington, D.C.

Explore flights to Washington, D.C. departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 6 March 2026.

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 Belfast Intl to Washington, D.C.?

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 6 March 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 6 March 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 6 March 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 6 March 2026.