What is the cheapest month to book a flight from Belfast Intl Airport to Washington, D.C.?

Currently, August is the cheapest month in which you can book a flight from Belfast Intl Airport to Washington, D.C. (average of $241). Flying from Belfast Intl Airport to Washington, D.C. in March is currently the most expensive (average of $290). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What are the most popular routes from Belfast Intl Airport to Washington, D.C.?

The most popular flight routes from Belfast Intl Airport to Washington, D.C. are Belfast Intl - Washington, D.C. Dulles Intl, Belfast Intl - Baltimore/Washington and Belfast Intl - Washington, D.C. Reagan-National.

What is the cheapest time of day to fly from BFS to WAS?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast Intl Airport to Washington, D.C. as you normally would.

Most accurate provider : When it comes to deals on Belfast Intl Airport-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Belfast Intl Airport-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Belfast Intl Airport-Washington, D.C. flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Belfast Intl Airport-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Belfast Intl Airport-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Belfast Intl to Washington, D.C. that include hotel bookings?

Yes. In addition to deals on Belfast Intl to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Belfast Intl to Washington, D.C.?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to Washington, D.C..

Can I find deals for business class flights from Belfast Intl to Washington, D.C.?

Yes. Cheapflights offers flight deals from Belfast Intl to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$663+ Flights from Belfast Intl Airport to Washington, D.C.

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Cheap flight deals from Belfast Intl to Washington, D.C.

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$663 (Mytrip)

Provider with most accurate pricing for Belfast Intl-Washington, D.C. (WAS) flight deals.

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Provider most trusted by Cheapflights users for Belfast Intl-Washington, D.C. (WAS) flights.

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From Belfast Intl to Washington, D.C. (WAS)

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Find flight deals from Belfast Intl to Washington, D.C.

Cheapest flights from Belfast Intl to Washington, D.C.
Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2025.

Thu 11/67:45 pmBFS - IAD

3 stops30h 15mMultiple Airlines

Thu 11/135:30 pmIAD - BFS

3 stops21h 55mMultiple Airlines

Deal found 9/22

$663

Wed 11/56:30 amBFS - IAD

2 stops17h 00mMultiple Airlines

Wed 11/127:40 pmIAD - BFS

2 stops21h 40mMultiple Airlines

Deal found 9/21

$670

Wed 11/56:30 amBFS - BWI

2 stops17h 10mMultiple Airlines

Wed 11/127:40 pmBWI - BFS

2 stops21h 40mMultiple Airlines

Deal found 9/21

$766

Best flights from Belfast Intl to Washington, D.C.
Discover carefully curated flight deals from Belfast Intl to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2025.

Thu 11/66:30 amBFS - IAD

2 stops17h 00mMultiple Airlines

Thu 11/137:40 pmIAD - BFS

2 stops21h 40mMultiple Airlines

Deal found 9/22

$692

Wed 11/57:40 amBFS - IAD

3 stops36h 35mMultiple Airlines

Wed 11/1210:30 pmIAD - BFS

2 stops16h 05mMultiple Airlines

Deal found 9/21

$701

Wed 11/56:30 amBFS - BWI

2 stops17h 10mMultiple Airlines

Wed 11/127:40 pmBWI - BFS

2 stops21h 40mMultiple Airlines

Deal found 9/21

$766

Cheapflights Fare Finder

Use the filters below to find and compare flights from Belfast Intl Airport to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Thu 11/6

6:30 am-6:30 pm

2 stops17h 00m

Washington, D.C. Dulles Intl

Thu 11/13

7:40 pm-10:20 pm

2 stops21h 40m

$692

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Wed 11/5

7:40 am-3:15 pm

3 stops36h 35m

Washington, D.C. Dulles Intl

Wed 11/12

10:30 pm-7:35 pm

2 stops16h 05m

$701

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Wed 11/5

6:30 am-6:40 pm

2 stops17h 10m

Baltimore/Washington

Wed 11/12

7:40 pm-10:20 pm

2 stops21h 40m

$766

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/22

Compare providers for flights from Belfast Intl to Washington, D.C.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Belfast Intl to Washington, D.C. in September.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Belfast Intl Airport-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Belfast Intl Airport-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Belfast Intl Airport-Washington, D.C. flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Belfast Intl Airport-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Belfast Intl Airport-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Belfast Intl to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Belfast Intl with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Belfast Intl Airport to Washington, D.C.

No data available for this route at this time. Please check back soon.

Related info for your journey

What are the most popular routes from Belfast Intl Airport to Washington, D.C.?
The most popular flight routes from Belfast Intl Airport to Washington, D.C. are Belfast Intl - Washington, D.C. Dulles Intl, Belfast Intl - Baltimore/Washington and Belfast Intl - Washington, D.C. Reagan-National.
Can I find deals for flights from Belfast Intl to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Belfast Intl to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Belfast Intl to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to Washington, D.C..
Can I find deals for business class flights from Belfast Intl to Washington, D.C.?
Yes. Cheapflights offers flight deals from Belfast Intl to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Belfast Intl Airport to Washington, D.C.?
Currently, August is the cheapest month in which you can book a flight from Belfast Intl Airport to Washington, D.C. (average of $241). Flying from Belfast Intl Airport to Washington, D.C. in March is currently the most expensive (average of $290). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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$663+ Cheap flights from Belfast Intl (BFS) to Washington, D.C. (WAS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/6. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Belfast Intl to Washington, D.C. with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Belfast Intl to Washington, D.C.

Most accurate provider

Most trusted provider

Round-trip from

Find flight deals from Belfast Intl to Washington, D.C.

Cheapest flights from Belfast Intl to Washington, D.C.Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2025.

Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Belfast Intl Airport to Washington, D.C. that are best for you.

Compare providers for flights from Belfast Intl to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Belfast Intl to Washington, D.C. in September.

Best time to book a flight from Belfast Intl to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Belfast Intl with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Belfast Intl Airport to Washington, D.C.

Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the most popular routes from Belfast Intl Airport to Washington, D.C.?

Can I find deals for flights from Belfast Intl to Washington, D.C. that include hotel bookings?

How can I find direct flights from Belfast Intl to Washington, D.C.?

Can I find deals for business class flights from Belfast Intl to Washington, D.C.?

What is the cheapest month to book a flight from Belfast Intl Airport to Washington, D.C.?

Traveling to a place near Washington, D.C.?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Belfast Intl to Washington, D.C.

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Cheapest flights from Belfast Intl to Washington, D.C.
Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2025.