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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from $415

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 7/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 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 - 7:50 pm
IAD
-
BFS
18h 20m
3 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$757Multiple Airlines
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
8:30 pm - 7:40 pm
IAD
-
BFS
18h 10m
2 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$763Multiple Airlines
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
8:30 pm - 11:25 pm
IAD
-
BFS
21h 55m
2 stops
Multiple Airlines Logo
10:10 pm - 3:10 pm
BFS
-
IAD
46h 00m
3 stops
$790Multiple Airlines
Sat, Apr 25 - Sun, May 3
Multiple Airlines Logo
1:20 pm - 11:10 pm
IAD
-
BFS
28h 50m
2 stops
Multiple Airlines Logo
8:50 am - 11:35 am
BFS
-
IAD
31h 45m
2 stops
$942Multiple Airlines
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
3:45 pm - 4:20 pm
IAD
-
BFS
19h 35m
3 stops
Multiple Airlines Logo
9:05 pm - 3:10 pm
BFS
-
IAD
47h 05m
3 stops
$960Multiple Airlines
Tue, May 19 - Mon, May 25
Multiple Airlines Logo
5:17 pm - 4:20 pm
IAD
-
BFS
18h 03m
2 stops
Multiple Airlines Logo
9:05 pm - 3:10 pm
BFS
-
IAD
47h 05m
3 stops
$970Multiple Airlines
Tue, May 19 - Mon, May 25
Multiple Airlines Logo
1:20 pm - 11:25 pm
IAD
-
BFS
29h 05m
2 stops
Multiple Airlines Logo
7:00 am - 11:35 am
BFS
-
IAD
33h 35m
2 stops
$973Multiple Airlines
Sat, Apr 25 - Sun, May 3
Multiple Airlines Logo
8:20 pm - 9:40 pm
IAD
-
BFS
20h 20m
2 stops
Multiple Airlines Logo
10:10 pm - 3:10 pm
BFS
-
IAD
46h 00m
3 stops
$1,011Multiple Airlines
Thu, Apr 23 - Sun, Apr 26
Multiple Airlines Logo
1:20 pm - 11:00 pm
IAD
-
BFS
28h 40m
2 stops
Multiple Airlines Logo
7:00 am - 11:35 am
BFS
-
IAD
33h 35m
2 stops
$1,028Multiple Airlines
Thu, Apr 23 - Sun, Apr 26
Multiple Airlines Logo
8:18 am - 9:00 pm
IAD
-
BFS
31h 42m
3 stops
Multiple Airlines Logo
8:45 pm - 7:20 pm
BFS
-
IAD
27h 35m
3 stops
$1,051Multiple Airlines
Sun, May 24 - Sun, May 31

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 April 11, 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

Cheapest round-trip

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 5/5

8:30 pm-7:50 pm

3 stops18h 20m

Belfast Intl

Tue 5/12

8:15 pm-3:10 pm

3 stops47h 55m

$757

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 5/5

8:30 pm-7:40 pm

2 stops18h 10m

Belfast Intl

Tue 5/12

8:15 pm-3:10 pm

3 stops47h 55m

$763

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 4/25

8:30 pm-11:25 pm

2 stops21h 55m

Belfast Intl

Sun 5/3

10:10 pm-3:10 pm

3 stops46h 00m

$790

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 5/5

1:20 pm-11:10 pm

2 stops28h 50m

Belfast Intl

Tue 5/12

8:50 am-11:35 am

2 stops31h 45m

$942

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 5/19

3:45 pm-4:20 pm

3 stops19h 35m

Belfast Intl

Mon 5/25

9:05 pm-3:10 pm

3 stops47h 05m

$960

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 5/19

5:17 pm-4:20 pm

2 stops18h 03m

Belfast Intl

Mon 5/25

9:05 pm-3:10 pm

3 stops47h 05m

$970

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 4/25

1:20 pm-11:25 pm

2 stops29h 05m

Belfast Intl

Sun 5/3

7:00 am-11:35 am

2 stops33h 35m

$973

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 4/23

8:20 pm-9:40 pm

2 stops20h 20m

Belfast Intl

Sun 4/26

10:10 pm-3:10 pm

3 stops46h 00m

$1,011

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 4/23

1:20 pm-11:00 pm

2 stops28h 40m

Belfast Intl

Sun 4/26

7:00 am-11:35 am

2 stops33h 35m

$1,028
Quickest round-trip

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 5/24

8:18 am-9:00 pm

3 stops31h 42m

Belfast Intl

Sun 5/31

8:45 pm-7:20 pm

3 stops27h 35m

$1,051

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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 15m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport takes 10h 15m
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

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport

  • 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 15m.

  • 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 $652Free CancellationRating
6.7
7,871 reviews
Search British Airways flights

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport

  • 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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