£275 Cheap Flights from Washington (IAD) to Belfast (BHD)

View £275 flight on Tue, 28 Jul 2026Opens in a new window

Popular airlines from Washington Dulles International Airport (IAD) to Belfast (BHD-George Best Belfast City)

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Cheap Flights from Washington (IAD) to Belfast (BHD)

Prices were available within the past 7 days and start at £275 for one-way flights and £763 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, 7 Sept - Mon, 14 Sept
IAD
Washington
BHD
Belfast
£763 Return, found 5 days ago
£763
Return
found 5 days ago
Select British Airways flight, departing Mon, 7 Sept from Washington to Belfast, returning Mon, 14 Sept, priced at £763 found 5 days ago
KLM
Thu, 6 Aug - Thu, 3 Sept
IAD
Washington
BHD
Belfast
£782 Return, found 5 days ago
£782
Return
found 5 days ago
Select KLM flight, departing Thu, 6 Aug from Washington to Belfast, returning Thu, 3 Sept, priced at £782 found 5 days ago
Virgin Atlantic
Thu, 6 Aug - Thu, 3 Sept
IAD
Washington
BHD
Belfast
£782 Return, found 5 days ago
£782
Return
found 5 days ago
Select Virgin Atlantic flight, departing Thu, 6 Aug from Washington to Belfast, returning Thu, 3 Sept, priced at £782 found 5 days ago
KLM
Mon, 7 Sept - Mon, 14 Sept
IAD
Washington
BHD
Belfast
£783 Return, found 5 days ago
£783
Return
found 5 days ago
Select KLM flight, departing Mon, 7 Sept from Washington to Belfast, returning Mon, 14 Sept, priced at £783 found 5 days ago
British Airways
Thu, 6 Aug - Fri, 4 Sept
IAD
Washington
BHD
Belfast
£785 Return, found 5 days ago
£785
Return
found 5 days ago
Select British Airways flight, departing Thu, 6 Aug from Washington to Belfast, returning Fri, 4 Sept, priced at £785 found 5 days ago
British Airways
Mon, 7 Sept - Mon, 14 Sept
IAD
Washington
BHD
Belfast
£786 Return, found 5 days ago
£786
Return
found 5 days ago
Select British Airways flight, departing Mon, 7 Sept from Washington to Belfast, returning Mon, 14 Sept, priced at £786 found 5 days ago
British Airways
Thu, 6 Aug - Thu, 3 Sept
IAD
Washington
BHD
Belfast
£788 Return, found 5 days ago
£788
Return
found 5 days ago
Select British Airways flight, departing Thu, 6 Aug from Washington to Belfast, returning Thu, 3 Sept, priced at £788 found 5 days ago
British Airways
Thu, 6 Aug - Thu, 3 Sept
IAD
Washington
BHD
Belfast
£793 Return, found 5 days ago
£793
Return
found 5 days ago
Select British Airways flight, departing Thu, 6 Aug from Washington to Belfast, returning Thu, 3 Sept, priced at £793 found 5 days ago
Air France
Mon, 7 Sept - Mon, 14 Sept
IAD
Washington
BHD
Belfast
£804 Return, found 5 days ago
£804
Return
found 5 days ago
Select Air France flight, departing Mon, 7 Sept from Washington to Belfast, returning Mon, 14 Sept, priced at £804 found 5 days ago
American Airlines
Sun, 3 May - Sun, 10 May
IAD
Washington
BHD
Belfast
£851 Return, found 4 days ago
£851
Return
found 4 days ago
Select American Airlines flight, departing Sun, 3 May from Washington to Belfast, returning Sun, 10 May, priced at £851 found 4 days ago

Frequently asked questions

How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City)?
There are approximately 20 connecting flights per day from Washington Dulles Intl. (IAD) to George Best Belfast City (BHD). Some common connection points include Unknown (DUB), Heathrow (LHR), and Charlotte-Douglas Intl. (CLT).
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City)?
The earliest flight from Washington Dulles Intl. (IAD) to George Best Belfast City (BHD) typically departs at approximately 6:00 AM local time. This service is operated by United Airlines and Aer Lingus, and it is a seasonal service active in February. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City)?
You'll typically find the most flights from Washington Dulles Intl. (IAD) to George Best Belfast City (BHD) on a Wednesday, with around 42 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United Airlines, Delta Air Lines, and British Airways.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City)?
The most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City) are in the afternoon, between 3pm and 6pm. About 31% of passengers prefer this time window. Many major carriers, including Aer Lingus and British Airways, offer flights during this window. This timing works well if you prefer to travel during the day and arrive at your destination in the evening.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City)?
A flight from IAD to BHD with a layover takes around 17 hours 30 minutes, with the route covering approximately 3,392 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City)?
Select the "Business class" and "First class" filters when looking for IAD to BHD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Belfast from Washington Dulles Intl. (IAD)?
From Washington Dulles Intl. (IAD), you can fly into Belfast Intl. (BFS) and George Best Belfast City (BHD) in Belfast. Some flights may connect through major hubs like Hartsfield-Jackson Atlanta Intl. (ATL), Charlotte-Douglas Intl. (CLT), DUB (DUB) before reaching Belfast. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Belfast (BHD-George Best Belfast City) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
George Best Belfast City
Airlines serving
Aer Lingus, British Airways, KLM, Virgin Atlantic
Return price
£762
Distance
5426 km

Book with confidence

Compare flights from Washington to Belfast easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Washington to Belfast. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to George Best Belfast City in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Washington Dulles Intl. to George Best Belfast City.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Washington Dulles Intl. (IAD) to George Best Belfast City (BHD)

The easiest way to view the best deals on flights from Washington to Belfast today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Washington Dulles Intl. to George Best Belfast City start at just £763 and range up to £851.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Washington and Belfast
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Washington to Belfast flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to George Best Belfast City for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Washington to Belfast easily and book with confidence

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*Available to Expedia members.