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Cheap flights from Washington, D.C. to Belfast from $418

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 4/15. 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. to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:00 pm - 6:55 pmIAD-BFS
16h 55m2 stops
Multiple Airlines Logo
7:10 am - 3:35 pmBFS-IAD
13h 25m2 stops
$691Multiple Airlines
Find Deal
Sun, Jan 4 - Sun, Jan 11
Multiple Airlines Logo
9:00 pm - 10:40 pmIAD-BFS
20h 40m2 stops
Multiple Airlines Logo
6:00 am - 3:35 pmBFS-IAD
14h 35m2 stops
$700Multiple Airlines
Find Deal
Sat, Jan 3 - Sat, Jan 10
Multiple Airlines Logo
6:05 pm - 6:55 pmIAD-BFS
20h 50m2 stops
Multiple Airlines Logo
6:00 am - 4:35 pmBFS-IAD
14h 35m2 stops
$745Multiple Airlines
Find Deal
Sun, Mar 8 - Sat, Mar 14
Multiple Airlines Logo
7:40 pm - 1:05 pmBWI-BFS
12h 25m2 stops
Multiple Airlines Logo
8:15 am - 6:40 pmBFS-BWI
15h 25m2 stops
$757Multiple Airlines
Find Deal
Fri, Feb 20 - Mon, Feb 23
Multiple Airlines Logo
7:40 pm - 10:45 pmBWI-BFS
22h 05m3 stops
Multiple Airlines Logo
10:20 am - 11:17 pmBFS-BWI
17h 57m2 stops
$827Multiple Airlines
Find Deal
Fri, Feb 20 - Mon, Feb 23
Multiple Airlines Logo
7:40 pm - 10:45 pmBWI-BFS
22h 05m3 stops
Multiple Airlines Logo
10:20 am - 10:27 amBFS-BWI
29h 07m3 stops
$844Multiple Airlines
Find Deal
Fri, Feb 20 - Mon, Feb 23
Multiple Airlines Logo
9:45 pm - 10:25 pmIAD-BFS
20h 40m2 stops
Multiple Airlines Logo
5:45 am - 10:00 pmBFS-IAD
44h 15m3 stops
$850Multiple Airlines
Find Deal
Sun, Mar 8 - Sat, Mar 14
Multiple Airlines Logo
9:55 am - 6:55 pmIAD-BFS
29h 00m3 stops
Multiple Airlines Logo
5:45 am - 10:00 pmBFS-IAD
44h 15m3 stops
$922Multiple Airlines
Find Deal
Sun, Mar 8 - Sat, Mar 14
Multiple Airlines Logo
8:30 pm - 3:20 pmIAD-BFS
13h 50m2 stops
Multiple Airlines Logo
7:35 pm - 8:35 pmBFS-IAD
30h 00m3 stops
$926Multiple Airlines
Find Deal
Wed, Apr 8 - Sun, Apr 12
Multiple Airlines Logo
6:00 pm - 10:45 pmIAD-BFS
23h 45m3 stops
Multiple Airlines Logo
6:15 am - 9:00 pmBFS-IAD
43h 45m3 stops
$963Multiple Airlines
Find Deal
Thu, Jan 1 - Thu, Jan 8

momondo Fare Finder

 
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 November 20, 2025.
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

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 1/4

9:00 pm-6:55 pm

2 stops16h 55m

Belfast Intl

Sun 1/11

7:10 am-3:35 pm

2 stops13h 25m

$691

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 1/3

9:00 pm-10:40 pm

2 stops20h 40m

Belfast Intl

Sat 1/10

6:00 am-3:35 pm

2 stops14h 35m

$700

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 3/8

6:05 pm-6:55 pm

2 stops20h 50m

Belfast Intl

Sat 3/14

6:00 am-4:35 pm

2 stops14h 35m

$745

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Fri 2/20

7:40 pm-1:05 pm

2 stops12h 25m

Belfast Intl

Mon 2/23

8:15 am-6:40 pm

2 stops15h 25m

$757

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Fri 2/20

7:40 pm-10:45 pm

3 stops22h 05m

Belfast Intl

Mon 2/23

10:20 am-11:17 pm

2 stops17h 57m

$827

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Fri 2/20

7:40 pm-10:45 pm

3 stops22h 05m

Belfast Intl

Mon 2/23

10:20 am-10:27 am

3 stops29h 07m

$844

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 3/8

9:45 pm-10:25 pm

2 stops20h 40m

Belfast Intl

Sat 3/14

5:45 am-10:00 pm

3 stops44h 15m

$850

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 3/8

9:55 am-6:55 pm

3 stops29h 00m

Belfast Intl

Sat 3/14

5:45 am-10:00 pm

3 stops44h 15m

$922

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 4/8

8:30 pm-3:20 pm

2 stops13h 50m

Belfast Intl

Sun 4/12

7:35 pm-8:35 pm

3 stops30h 00m

$926

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 1/1

6:00 pm-10:45 pm

3 stops23h 45m

Belfast Intl

Thu 1/8

6:15 am-9:00 pm

3 stops43h 45m

$963

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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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

What is the typical price of a round-trip flight between Washington, D.C. and Belfast Intl Airport?

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

The cheapest day to depart on your flight to Belfast Intl Airport is on a Tuesday when prices can be found for as low as $680. This is often the case because there is less demand to fly during this day of the week. 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. to Belfast Intl Airport for around $884.

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

In the evening is the cheapest time of day to fly from Washington, D.C. to Belfast Intl Airport when you can find flight prices for as low as $683. Flying to Belfast Intl Airport in the evening is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Belfast Intl Airport is in the afternoon when prices are around $762.

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

Direct flights

None
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.
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  • 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 12h 05m 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 $627Free CancellationRating
6.7
7,533 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
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.

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