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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from $325

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Belfast departing on 7/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 pm - 3:15 pm
IAD
-
BFS
13h 45m
2 stops
Multiple Airlines Logo
7:30 am - 7:20 pm
BFS
-
IAD
16h 50m
2 stops
$634Multiple Airlines
Tue, Apr 7 - Wed, Apr 15
Multiple Airlines Logo
8:30 pm - 7:40 pm
IAD
-
BFS
18h 10m
2 stops
Multiple Airlines Logo
8:30 am - 3:10 pm
BFS
-
IAD
35h 40m
3 stops
$652Multiple Airlines
Tue, Apr 7 - Wed, Apr 15
Multiple Airlines Logo
8:30 pm - 8:40 pm
IAD
-
BFS
19h 10m
2 stops
Multiple Airlines Logo
9:10 am - 3:10 pm
BFS
-
IAD
35h 00m
2 stops
$658Multiple Airlines
Mon, Apr 6 - Mon, Apr 13
Multiple Airlines Logo
8:30 pm - 5:05 pm
IAD
-
BFS
15h 35m
2 stops
Multiple Airlines Logo
7:35 am - 7:20 pm
BFS
-
IAD
16h 45m
2 stops
$673Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
Multiple Airlines Logo
8:30 pm - 8:40 pm
IAD
-
BFS
19h 10m
3 stops
Multiple Airlines Logo
8:30 am - 8:35 pm
BFS
-
IAD
41h 05m
3 stops
$683Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
Multiple Airlines Logo
8:30 pm - 10:35 pm
IAD
-
BFS
21h 05m
3 stops
Multiple Airlines Logo
8:15 pm - 8:35 pm
BFS
-
IAD
29h 20m
3 stops
$695Multiple Airlines
Sun, Apr 12 - Wed, Apr 15
Multiple Airlines Logo
8:30 pm - 11:20 pm
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
8:30 am - 3:10 pm
BFS
-
IAD
35h 40m
3 stops
$704Multiple Airlines
Tue, Apr 7 - Wed, Apr 15
Multiple Airlines Logo
8:30 pm - 11:05 pm
IAD
-
BFS
21h 35m
2 stops
Multiple Airlines Logo
7:10 am - 8:35 pm
BFS
-
IAD
42h 25m
3 stops
$728Multiple Airlines
Thu, Apr 2 - Sun, Apr 12
Multiple Airlines Logo
8:30 pm - 9:00 pm
IAD
-
BFS
19h 30m
2 stops
Multiple Airlines Logo
8:15 pm - 8:35 pm
BFS
-
IAD
29h 20m
3 stops
$752Multiple Airlines
Sun, Apr 12 - Wed, Apr 15
Multiple Airlines Logo
8:30 pm - 11:00 pm
IAD
-
BFS
21h 30m
3 stops
Multiple Airlines Logo
7:10 am - 8:35 pm
BFS
-
IAD
42h 25m
3 stops
$755Multiple Airlines
Thu, Apr 2 - Sun, Apr 12

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport 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, momondo users made 832,500 searches. Data last updated February 23, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 4/7

8:30 pm-3:15 pm

2 stops13h 45m

Belfast Intl

Wed 4/15

7:30 am-7:20 pm

2 stops16h 50m

$634

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 4/7

8:30 pm-7:40 pm

2 stops18h 10m

Belfast Intl

Wed 4/15

8:30 am-3:10 pm

3 stops35h 40m

$652

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 4/6

8:30 pm-8:40 pm

2 stops19h 10m

Belfast Intl

Mon 4/13

9:10 am-3:10 pm

2 stops35h 00m

$658

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 4/8

8:30 pm-5:05 pm

2 stops15h 35m

Belfast Intl

Wed 4/15

7:35 am-7:20 pm

2 stops16h 45m

$673

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 4/8

8:30 pm-8:40 pm

3 stops19h 10m

Belfast Intl

Wed 4/15

8:30 am-8:35 pm

3 stops41h 05m

$683

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 4/12

8:30 pm-10:35 pm

3 stops21h 05m

Belfast Intl

Wed 4/15

8:15 pm-8:35 pm

3 stops29h 20m

$695

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 4/7

8:30 pm-11:20 pm

3 stops21h 50m

Belfast Intl

Wed 4/15

8:30 am-3:10 pm

3 stops35h 40m

$704

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 4/2

8:30 pm-11:05 pm

2 stops21h 35m

Belfast Intl

Sun 4/12

7:10 am-8:35 pm

3 stops42h 25m

$728

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 4/12

8:30 pm-9:00 pm

2 stops19h 30m

Belfast Intl

Wed 4/15

8:15 pm-8:35 pm

3 stops29h 20m

$752

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 4/2

8:30 pm-11:00 pm

3 stops21h 30m

Belfast Intl

Sun 4/12

7:10 am-8:35 pm

3 stops42h 25m

$755

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
1
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When to book flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to Belfast Intl Airport (IAD to BFS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport

Fastest flight time

10h 20m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport takes 10h 20m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport.
Search flight deals

  • How far is Washington, D.C. Dulles Intl to Belfast Intl by plane?

    Belfast Intl is 3375.6 mi away from Washington, D.C. Dulles Intl. By plane, this route typically takes 10h 20m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport.

  • What documentation or ID do you need to fly to Belfast Intl Airport?

    The travel and health documents you'll need for your trip to Belfast Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Belfast Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport?

Best airlines flying from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $627Free CancellationRating
6.7
7,759 reviews
Search British Airways flights

  • How do I get Price Alerts for flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport?

    Price Alerts will notify you by email when the price for flights to Belfast Intl Airport from Washington, D.C. Dulles Intl Airport decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Traveling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Armagh
Cookstown
Ballymena
Newry
Dungannon

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Belfast?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Belfast from Washington, D.C..

Can I find flights from Washington, D.C. to Belfast with flexible booking policies on momondo?

Flights from Washington, D.C. to Belfast with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington, D.C. to Belfast?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Belfast from Washington, D.C..

I’m not ready to book a flight from Washington, D.C. to Belfast right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Washington, D.C. to Belfast flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Belfast Intl Airport trip

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