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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from $630

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 10/3. 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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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Belfast

Cheap round-trip flights

American Airlines Logo
10:45 pm - 6:15 pmIAD-BHD
14h 30m1 stop
American Airlines Logo
11:55 am - 8:15 pmBHD-IAD
13h 20m1 stop
$630American Airlines
Find Deal
Fri, Oct 3 - Fri, Oct 10
British Airways Logo
6:20 pm - 10:30 amIAD-BHD
11h 10m1 stop
British Airways Logo
12:25 pm - 7:55 pmBHD-IAD
12h 30m1 stop
$634British Airways
Find Deal
Tue, Jan 6 - Wed, Jan 14
American Airlines Logo
10:45 pm - 6:15 pmIAD-BHD
14h 30m1 stop
American Airlines Logo
6:35 am - 7:45 pmBHD-IAD
18h 10m2 stops
$640American Airlines
Find Deal
Fri, Oct 3 - Fri, Oct 10
Delta Logo
5:25 pm - 4:55 pmIAD-BHD
18h 30m1 stop
Delta Logo
6:30 am - 3:35 pmBHD-IAD
14h 05m1 stop
$708Delta
Find Deal
Mon, Oct 6 - Mon, Oct 20
KLM Logo
7:35 pm - 4:55 pmIAD-BHD
16h 20m2 stops
KLM Logo
6:30 am - 3:35 pmBHD-IAD
14h 05m1 stop
$709KLM
Find Deal
Mon, Oct 6 - Mon, Oct 20
Virgin Atlantic Logo
5:03 pm - 9:00 pmIAD-BHD
22h 57m2 stops
Virgin Atlantic Logo
6:30 am - 4:05 pmBHD-IAD
14h 35m1 stop
$712Virgin Atlantic
Find Deal
Wed, Nov 12 - Sun, Nov 16
Delta Logo
11:05 am - 9:00 pmIAD-BHD
28h 55m2 stops
Delta Logo
5:20 pm - 4:23 pmBHD-IAD
28h 03m2 stops
$722Delta
Find Deal
Wed, Nov 12 - Sun, Nov 16
British Airways Logo
6:20 pm - 9:10 amIAD-BHD
9h 50m1 stop
British Airways Logo
9:10 am - 3:35 pmBHD-IAD
11h 25m1 stop
$747British Airways
Find Deal
Wed, Nov 12 - Sun, Nov 16
Virgin Atlantic Logo
6:10 am - 4:50 pmIAD-BHD
29h 40m2 stops
Virgin Atlantic Logo
5:20 pm - 11:02 pmBHD-IAD
34h 42m2 stops
$783Virgin Atlantic
Find Deal
Tue, Jan 6 - Wed, Jan 14
KLM Logo
6:05 pm - 9:00 pmIAD-BHD
21h 55m1 stop
KLM Logo
6:30 am - 4:05 pmBHD-IAD
14h 35m1 stop
$984KLM
Find Deal
Tue, Nov 25 - Fri, Nov 28

Aer Lingus flights from Washington, D.C. Dulles Intl Airport to Belfast

Our best Aer Lingus deals on Washington, D.C. Dulles Intl Airport to Belfast flight tickets
Aer Lingus
Oct 13
IAD8:25 pmWashington, D.C. Dulles Intl
12h 20m
2 stops
BHD1:45 pmBelfast City
Oct 20
BHD9:50 amBelfast City
14h 05m
2 stops
IAD6:55 pmWashington, D.C. Dulles Intl
$925
Find similar
Aer Lingus
Oct 6
IAD8:25 pmWashington, D.C. Dulles Intl
12h 20m
2 stops
BHD1:45 pmBelfast City
Oct 20
BHD9:50 amBelfast City
14h 05m
2 stops
IAD6:55 pmWashington, D.C. Dulles Intl
$941
Find similar

KLM flights from Washington, D.C. Dulles Intl Airport to Belfast

Our best KLM deals on Washington, D.C. Dulles Intl Airport to Belfast flight tickets
KLM
Oct 6
IAD7:35 pmWashington, D.C. Dulles Intl
16h 20m
2 stops
BHD4:55 pmBelfast City
Oct 20
BHD6:30 amBelfast City
14h 05m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$709
Find similar
KLM
Sep 17
IAD5:25 pmWashington, D.C. Dulles Intl
18h 30m
1 stop
BHD4:55 pmBelfast City
Sep 23
BHD5:25 pmBelfast City
27h 10m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$833
Find similar
KLM
Sep 17
IAD5:25 pmWashington, D.C. Dulles Intl
18h 30m
1 stop
BHD4:55 pmBelfast City
Sep 23
BHD6:30 amBelfast City
17h 09m
2 stops
IAD6:39 pmWashington, D.C. Dulles Intl
$843
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to Belfast 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 September 16, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Fri 10/3

10:45 pm-6:15 pm

1 stop14h 30m

Belfast City

Fri 10/10

11:55 am-8:15 pm

1 stop13h 20m

$630

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 1/6

6:20 pm-10:30 am

1 stop11h 10m

Belfast City

Wed 1/14

12:25 pm-7:55 pm

1 stop12h 30m

$634

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Fri 10/3

10:45 pm-6:15 pm

1 stop14h 30m

Belfast City

Fri 10/10

6:35 am-7:45 pm

2 stops18h 10m

$640

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 10/6

5:25 pm-4:55 pm

1 stop18h 30m

Belfast City

Mon 10/20

6:30 am-3:35 pm

1 stop14h 05m

$708

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 10/6

7:35 pm-4:55 pm

2 stops16h 20m

Belfast City

Mon 10/20

6:30 am-3:35 pm

1 stop14h 05m

$709

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 11/12

5:03 pm-9:00 pm

2 stops22h 57m

Belfast City

Sun 11/16

6:30 am-4:05 pm

1 stop14h 35m

$712

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 11/12

11:05 am-9:00 pm

2 stops28h 55m

Belfast City

Sun 11/16

5:20 pm-4:23 pm

2 stops28h 03m

$722

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 11/12

6:20 pm-9:10 am

1 stop9h 50m

Belfast City

Sun 11/16

9:10 am-3:35 pm

1 stop11h 25m

$747

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 1/6

6:10 am-4:50 pm

2 stops29h 40m

Belfast City

Wed 1/14

5:20 pm-11:02 pm

2 stops34h 42m

$783

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 11/25

6:05 pm-9:00 pm

1 stop21h 55m

Belfast City

Fri 11/28

6:30 am-4:05 pm

1 stop14h 35m

$984

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Belfast from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Belfast

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Belfast?

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to Belfast is on a Tuesday when prices can be found for as low as $680. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. Dulles Intl Airport to Belfast for around $884.

What is the cheapest time of day to depart on your flight to Belfast?

Our data shows that the cheapest Washington, D.C. Dulles Intl Airport to Belfast flights are usually those with departure times in the evening. Our users have found flights to Belfast in the evening for as low as $683. Try not to purchase tickets in the afternoon because they tend to be around $762. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap Washington, D.C. Dulles Intl Airport to Belfast 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

Direct flights

None
There are no direct flights from Washington, D.C. Dulles Intl Airport to Belfast. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Belfast.
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  • How far is Washington, D.C. Dulles Intl to Belfast by plane?

    The straight-line distance from Washington, D.C. Dulles Intl to Belfast is 3387.7 mi. Flights usually cover this in 9h 50m, depending on flying conditions and air traffic around both airports.

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

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

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

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

    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.

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

    The travel and health documents you'll need for your trip to Belfast 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Belfast with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $620Free CancellationRating
6.7
7,363 reviews
Search British Airways flights

Why use momondo?

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

It is quick and easy to find Washington, D.C. to Belfast flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Belfast that suits you.

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

Yes. momondo enables you to select and highlight flights to Belfast from Washington, D.C. with this policy.

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

Once you have performed a search for Washington, D.C. to Belfast flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast
Belfast Intl Airport
Belfast City Airport