How long is the flight from Belfast to Washington, D.C. Dulles Intl Airport?

Airlines like American Airlines fly from Belfast to Washington, D.C. Dulles Intl Airport in about 33h 55m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 3390 mi.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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).

Can I find deals for flights from Belfast to Dulles Intl that include hotel bookings?

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

How can I find direct flights from Belfast to Dulles Intl?

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

Can I find deals for business class flights from Belfast to Dulles Intl?

Yes. Cheapflights offers flight deals from Belfast to Dulles 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.

£296+ Flights from Belfast to Washington, D.C. Dulles Intl Airport

Cheap flight deals from Belfast to Dulles Intl

Round-trip from	£663
One-way from	£296

30/11-7/12
5 total stops
61h 15m total
Belfast to Washington, D.C.

Search Deals

15/12
3 total stops
36h 45m total
Belfast to Washington, D.C.

Search Deals

Find flight deals from Belfast to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Belfast to Dulles Intl
Explore the most affordable flight options available from Belfast to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.

Sun 30/1122:45BFS - IAD

3 stops45h 50mMultiple Airlines

Sun 7/1222:30IAD - BFS

2 stops15h 25mMultiple Airlines

Deal found 16/10£663

Thu 13/1115:05BHD - IAD

1 stop29h 30mAmerican Airlines

Mon 17/1118:20IAD - BHD

1 stop11h 20mAmerican Airlines

Deal found 14/10£718

Thu 13/1110:35BHD - IAD

2 stops13h 55mBritish Airways

Mon 17/1121:45IAD - BHD

2 stops13h 35mBritish Airways

Deal found 15/10£875

Best flights from Belfast to Dulles Intl
Discover carefully curated flight deals from Belfast to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 October 2025.

Sun 30/1122:45BFS - IAD

3 stops45h 50mMultiple Airlines

Sun 7/1222:30IAD - BFS

2 stops15h 25mMultiple Airlines

Deal found 16/10£663

Thu 13/1110:40BHD - IAD

1 stop33h 55mAmerican Airlines

Mon 17/1111:25IAD - BHD

2 stops18h 15mAmerican Airlines

Deal found 14/10£718

Thu 13/1110:35BHD - IAD

2 stops13h 55mBritish Airways

Mon 17/1121:45IAD - BHD

2 stops13h 35mBritish Airways

Deal found 15/10£875

Wed 1/406:30BHD - IAD

1 stop14h 05mVirgin Atlantic

Sun 5/419:59IAD - BHD

2 stops20h 21mVirgin Atlantic

Deal found 14/10£1,237

Last-minute flights from Belfast to Dulles Intl
Discover last-minute flight deals from Belfast to Dulles Intl. Data last updated 17 October 2025 and is based on user searches.

Thu 13/1115:05BHD - IAD

1 stop29h 30mAmerican Airlines

Mon 17/1118:20IAD - BHD

1 stop11h 20mAmerican Airlines

Deal found 14/10£718

Thu 13/1110:35BHD - IAD

2 stops13h 55mBritish Airways

Mon 17/1121:45IAD - BHD

2 stops13h 35mBritish Airways

Deal found 15/10£875

Sun 30/1122:45BFS - IAD

3 stops45h 50mMultiple Airlines

Sun 7/1222:30IAD - BFS

2 stops15h 25mMultiple Airlines

Deal found 16/10£663

One-way flights from Belfast to Dulles Intl
Search for one-way flight options from Belfast to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 17 October 2025.

Mon 15/1206:50BFS - IAD

3 stops36h 45mMultiple Airlines

Deal found 14/10£296

Sun 22/323:05BFS - IAD

3 stops44h 30mMultiple Airlines

Deal found 16/10£316

Mon 15/1215:25BHD - IAD

3 stops28h 10mMultiple Airlines

Deal found 14/10£351

Sun 22/314:15BHD - IAD

3 stops30h 00mMultiple Airlines

Deal found 16/10£408

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 30/11

22:45-15:35

3 stops45h 50m

Washington, D.C. Dulles Intl

Sun 7/12

22:30-18:55

2 stops15h 25m

£663

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 13/11

10:40-15:35

1 stop33h 55m

Washington, D.C. Dulles Intl

Mon 17/11

11:25-10:40

2 stops18h 15m

£718

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 13/11

10:35-19:30

2 stops13h 55m

Washington, D.C. Dulles Intl

Mon 17/11

21:45-16:20

2 stops13h 35m

£875

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Wed 1/4

06:30-15:35

1 stop14h 05m

Washington, D.C. Dulles Intl

Sun 5/4

19:59-21:20

2 stops20h 21m

£1,237

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Mon 15/12

06:50-14:35

3 stops36h 45m

£296

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 22/3

23:05-15:35

3 stops44h 30m

£316

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 15/12

15:25-14:35

3 stops28h 10m

£351

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Sun 22/3

14:15-16:15

3 stops30h 00m

£408

Flights are sorted by cheapest return flights first.

Deals found on 14/10

Best time to book a flight from Belfast to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Belfast 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 Belfast to Washington, D.C. Dulles Intl Airport

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

When flying from Belfast to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 36% versus a flight in the afternoon.

Related info for your journey

How long is the flight from Belfast to Washington, D.C. Dulles Intl Airport?
Airlines like American Airlines fly from Belfast to Washington, D.C. Dulles Intl Airport in about 33h 55m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 3390 mi.
Can I find deals for flights from Belfast to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Belfast to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Belfast to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to Dulles Intl.
Can I find deals for business class flights from Belfast to Dulles Intl?
Yes. Cheapflights offers flight deals from Belfast to Dulles 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.

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How does Cheapflights help users find flights from Belfast to Dulles Intl?

Cheapflights helps you search for flights from Belfast to Dulles 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 Belfast to Dulles Intl?

Millions of users choose and trust Cheapflights to book the best flight deals from Belfast to Dulles Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Belfast to Dulles Intl with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Belfast to Dulles Intl, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Belfast to Dulles Intl become cheaper?

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

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Cheap flights from Belfast to Washington, D.C. Dulles Intl Airport from £296

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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Belfast to Dulles Intl

Round-trip from

One-way from

Find flight deals from Belfast to Dulles Intl

Cheapest flights from Belfast to Dulles IntlExplore the most affordable flight options available from Belfast to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.

Explore the most affordable flight options available from Belfast to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Belfast to Dulles Intl

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

Cheapflights Insights

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

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

Find hourly flight availability from Belfast to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 October 2025.

Related info for your journey

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

How long is the flight from Belfast to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from Belfast to Dulles Intl that include hotel bookings?

How can I find direct flights from Belfast to Dulles Intl?

Can I find deals for business class flights from Belfast to Dulles Intl?

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Belfast to Dulles Intl

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

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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 to Dulles Intl?

Why should you use Cheapflights to find cheap flight tickets from Belfast to Dulles Intl?

Can Cheapflights find flights from Belfast to Dulles Intl with no change fees?

Can Cheapflights notify me if prices for flights from Belfast to Dulles Intl become cheaper?

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Cheapest flights from Belfast to Dulles Intl
Explore the most affordable flight options available from Belfast to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.