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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from $769

This is the cheapest round-trip 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 11/4. 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

Discover deals from 900+ travel sites with momondo.

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
7:40 pm - 8:45 pm
IAD
-
BFS
20h 05m
3 stops
Multiple Airlines Logo
7:55 am - 3:15 pm
BFS
-
IAD
36h 20m
3 stops
$769Multiple Airlines
Wed, Nov 4 - Wed, Nov 18
Multiple Airlines Logo
7:40 pm - 9:50 pm
IAD
-
BFS
21h 10m
2 stops
Multiple Airlines Logo
10:00 pm - 2:45 pm
BFS
-
IAD
45h 45m
3 stops
$773Multiple Airlines
Tue, Nov 24 - Sun, Nov 29
Multiple Airlines Logo
7:40 pm - 7:45 pm
IAD
-
BFS
19h 05m
2 stops
Multiple Airlines Logo
7:55 am - 3:15 pm
BFS
-
IAD
36h 20m
3 stops
$793Multiple Airlines
Wed, Nov 4 - Wed, Nov 18
Multiple Airlines Logo
5:25 pm - 9:30 pm
IAD
-
BFS
23h 05m
3 stops
Multiple Airlines Logo
10:00 pm - 2:45 pm
BFS
-
IAD
45h 45m
3 stops
$854Multiple Airlines
Tue, Nov 24 - Sun, Nov 29
Multiple Airlines Logo
11:20 pm - 9:45 pm
IAD
-
BFS
17h 25m
2 stops
Multiple Airlines Logo
10:45 pm - 8:24 pm
BFS
-
IAD
26h 39m
2 stops
$882Multiple Airlines
Wed, Jul 29 - Wed, Aug 5
Multiple Airlines Logo
8:30 pm - 11:05 pm
IAD
-
BFS
21h 35m
2 stops
Multiple Airlines Logo
8:50 am - 3:10 pm
BFS
-
IAD
35h 20m
3 stops
$885Multiple Airlines
Tue, Jul 28 - Tue, Aug 4
Multiple Airlines Logo
8:30 pm - 11:05 pm
IAD
-
BFS
21h 35m
2 stops
Multiple Airlines Logo
6:40 am - 9:26 pm
BFS
-
IAD
19h 46m
2 stops
$912Multiple Airlines
Tue, Jul 14 - Thu, Jul 16
Multiple Airlines Logo
12:35 pm - 7:50 pm
IAD
-
BFS
26h 15m
3 stops
Multiple Airlines Logo
6:40 am - 9:26 pm
BFS
-
IAD
19h 46m
2 stops
$931Multiple Airlines
Tue, Jul 14 - Thu, Jul 16
Multiple Airlines Logo
9:55 am - 7:50 pm
IAD
-
BFS
28h 55m
2 stops
Multiple Airlines Logo
5:55 am - 8:24 pm
BFS
-
IAD
19h 29m
2 stops
$948Multiple Airlines
Tue, Jul 14 - Wed, Jul 29
Multiple Airlines Logo
9:45 pm - 6:25 pm
IAD
-
BFS
15h 40m
1 stop
Multiple Airlines Logo
6:40 am - 12:53 pm
BFS
-
IAD
35h 13m
2 stops
$958Multiple Airlines
Sun, Aug 9 - Mon, Aug 24

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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 June 19, 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

Wed 11/4

7:40 pm-8:45 pm

3 stops20h 05m

Belfast Intl

Wed 11/18

7:55 am-3:15 pm

3 stops36h 20m

$769

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 11/24

7:40 pm-9:50 pm

2 stops21h 10m

Belfast Intl

Sun 11/29

10:00 pm-2:45 pm

3 stops45h 45m

$773

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 11/4

7:40 pm-7:45 pm

2 stops19h 05m

Belfast Intl

Wed 11/18

7:55 am-3:15 pm

3 stops36h 20m

$793

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 11/24

5:25 pm-9:30 pm

3 stops23h 05m

Belfast Intl

Sun 11/29

10:00 pm-2:45 pm

3 stops45h 45m

$854

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 7/29

11:20 pm-9:45 pm

2 stops17h 25m

Belfast Intl

Wed 8/5

10:45 pm-8:24 pm

2 stops26h 39m

$882

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 7/28

8:30 pm-11:05 pm

2 stops21h 35m

Belfast Intl

Tue 8/4

8:50 am-3:10 pm

3 stops35h 20m

$885
Quickest round-trip

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 7/14

8:30 pm-11:05 pm

2 stops21h 35m

Belfast Intl

Thu 7/16

6:40 am-9:26 pm

2 stops19h 46m

$912

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 7/14

12:35 pm-7:50 pm

3 stops26h 15m

Belfast Intl

Thu 7/16

6:40 am-9:26 pm

2 stops19h 46m

$931

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 7/14

9:55 am-7:50 pm

2 stops28h 55m

Belfast Intl

Wed 7/29

5:55 am-8:24 pm

2 stops19h 29m

$948

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 8/9

9:45 pm-6:25 pm

1 stop15h 40m

Belfast Intl

Mon 8/24

6:40 am-12:53 pm

2 stops35h 13m

$958

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 30m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport takes 10h 30m
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.
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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 30m.

  • 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
8,055 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
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.

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