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Cheap flights from Washington, D.C. to Belfast from $376

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. to Belfast departing on 6/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:55 am - 5:05 pm
IAD
-
BFS
26h 10m
2 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$828Multiple Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
8:30 pm - 4:15 pm
IAD
-
BFS
14h 45m
2 stops
Multiple Airlines Logo
9:25 pm - 3:10 pm
BFS
-
IAD
46h 45m
3 stops
$835Multiple Airlines
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
8:30 pm - 11:20 pm
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
9:25 pm - 3:10 pm
BFS
-
IAD
46h 45m
3 stops
$856Multiple Airlines
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
11:20 pm - 7:20 pm
BWI
-
BFS
15h 00m
2 stops
Multiple Airlines Logo
8:20 am - 7:25 pm
BFS
-
BWI
16h 05m
2 stops
$868Multiple Airlines
Thu, May 14 - Thu, May 21
Multiple Airlines Logo
8:30 pm - 11:00 pm
IAD
-
BFS
21h 30m
3 stops
Multiple Airlines Logo
9:00 am - 7:00 pm
BFS
-
IAD
39h 00m
3 stops
$893Multiple Airlines
Thu, Oct 8 - Thu, Oct 15
Multiple Airlines Logo
9:45 am - 8:55 am
IAD
-
BFS
18h 10m
3 stops
Multiple Airlines Logo
9:40 pm - 3:10 pm
BFS
-
IAD
46h 30m
3 stops
$906Multiple Airlines
Sat, May 30 - Sat, Jun 6
Multiple Airlines Logo
8:30 pm - 11:05 pm
IAD
-
BFS
21h 35m
2 stops
Multiple Airlines Logo
9:00 am - 7:00 pm
BFS
-
IAD
39h 00m
3 stops
$912Multiple Airlines
Thu, Oct 8 - Thu, Oct 15
Multiple Airlines Logo
8:30 pm - 8:15 pm
IAD
-
BFS
18h 45m
2 stops
Multiple Airlines Logo
6:05 am - 10:15 pm
BFS
-
IAD
21h 10m
2 stops
$921Multiple Airlines
Mon, May 11 - Fri, May 15
Multiple Airlines Logo
8:30 pm - 11:05 pm
IAD
-
BFS
21h 35m
2 stops
Multiple Airlines Logo
9:15 am - 3:10 pm
BFS
-
IAD
34h 55m
3 stops
$922Multiple Airlines
Thu, May 28 - Thu, Jun 4
Multiple Airlines Logo
8:30 pm - 4:35 pm
IAD
-
BFS
15h 05m
2 stops
Multiple Airlines Logo
7:40 am - 3:10 pm
BFS
-
IAD
36h 30m
3 stops
$933Multiple Airlines
Sat, May 2 - Sat, May 9

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Customize your flight search to find flights from Washington, D.C. 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 17, 2026.
Use the filters below to find and compare flights from Washington, D.C. 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 5/27

9:55 am-5:05 pm

2 stops26h 10m

Belfast Intl

Wed 6/3

8:15 pm-3:10 pm

3 stops47h 55m

$828

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 5/11

8:30 pm-4:15 pm

2 stops14h 45m

Belfast Intl

Mon 5/18

9:25 pm-3:10 pm

3 stops46h 45m

$835

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 5/11

8:30 pm-11:20 pm

3 stops21h 50m

Belfast Intl

Mon 5/18

9:25 pm-3:10 pm

3 stops46h 45m

$856
Quickest round-trip

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Thu 5/14

11:20 pm-7:20 pm

2 stops15h 00m

Belfast Intl

Thu 5/21

8:20 am-7:25 pm

2 stops16h 05m

$868

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 10/8

8:30 pm-11:00 pm

3 stops21h 30m

Belfast Intl

Thu 10/15

9:00 am-7:00 pm

3 stops39h 00m

$893

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 5/30

9:45 am-8:55 am

3 stops18h 10m

Belfast Intl

Sat 6/6

9:40 pm-3:10 pm

3 stops46h 30m

$906

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 10/8

8:30 pm-11:05 pm

2 stops21h 35m

Belfast Intl

Thu 10/15

9:00 am-7:00 pm

3 stops39h 00m

$912

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 5/11

8:30 pm-8:15 pm

2 stops18h 45m

Belfast Intl

Fri 5/15

6:05 am-10:15 pm

2 stops21h 10m

$921

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 5/28

8:30 pm-11:05 pm

2 stops21h 35m

Belfast Intl

Thu 6/4

9:15 am-3:10 pm

3 stops34h 55m

$922

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 5/2

8:30 pm-4:35 pm

2 stops15h 05m

Belfast Intl

Sat 5/9

7:40 am-3:10 pm

3 stops36h 30m

$933

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Belfast from

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

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

How long does it take to fly to Belfast Intl Airport?

On average, it takes 11h 54m to fly from Washington, D.C. to Belfast Intl Airport if you fly out of Washington, D.C. (the most popular airport in Washington, D.C.) and into Belfast Intl Airport (the most popular airport in Belfast Intl Airport). If you’re flying out of Baltimore and into Belfast Intl Airport, then the flight time is around 12h.

When to book flights from Washington, D.C. to Belfast Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. 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. to Belfast Intl Airport (WAS to BFS) flight deals and tips

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

Fastest flight time

10h 15m

Direct flights

None
The fastest flight from Washington, D.C. to Belfast Intl Airport takes 10h 15m
There are no direct flights from Washington, D.C. to Belfast Intl Airport. There are no popular flight routes from Washington, D.C. to Belfast Intl Airport.
Search flight deals

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

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

    A flight from Washington, D.C. to Belfast Intl will travel around 3361.5 mi. Typically, this will take 10h 15m by plane in normal conditions.

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

    Prices for flights from Washington, D.C. to Belfast Intl Airport refresh daily.

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

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

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

    The necessary travel and health documents for your Belfast Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

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

Compare and see reviews for airlines that fly from Washington, D.C. to Belfast Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $652Free CancellationRating
6.7
7,892 reviews
Search British Airways flights

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?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to Belfast. Millions of users trust and use momondo every year so you are in good hands.

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 all potential Washington, D.C. to Belfast flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to Belfast from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Belfast Intl Airport trip

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