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 $292). Flying from Belfast Intl Airport to Washington, D.C. in April is currently the most expensive (average of $337). 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.

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.

$327+ Flights from Belfast Intl Airport to Washington, D.C.

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

Round-trip from	$630 (Trip.com)
One-way from	$327 (Kiwi.com)

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

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One-way flight 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 septembre 11, 2025.

lun. 10/66:45 amBFS - BWI

2 stops15h 55mMultiple Airlines

lun. 10/136:50 pmBWI - BFS

2 stops20h 45mMultiple Airlines

Deal found 9/10

$630

lun. 10/277:50 amBFS - IAD

3 stops35h 45mMultiple Airlines

lun. 11/35:30 pmIAD - BFS

2 stops22h 40mMultiple Airlines

Deal found 9/11

$757

sam. 10/257:00 amBFS - IAD

2 stops16h 55mMultiple Airlines

sam. 11/110:00 pmIAD - BFS

2 stops19h 45mMultiple Airlines

Deal found 9/10

$989

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 septembre 11, 2025.

lun. 10/66:45 amBFS - BWI

2 stops15h 55mMultiple Airlines

lun. 10/136:50 pmBWI - BFS

2 stops20h 45mMultiple Airlines

Deal found 9/10

$630

lun. 10/277:50 amBFS - IAD

3 stops35h 45mMultiple Airlines

lun. 11/35:30 pmIAD - BFS

2 stops22h 40mMultiple Airlines

Deal found 9/11

$757

sam. 10/257:00 amBFS - IAD

2 stops16h 55mMultiple Airlines

sam. 11/110:00 pmIAD - BFS

2 stops19h 45mMultiple Airlines

Deal found 9/10

$989

Last-minute flights from Belfast Intl to Washington, D.C.
Discover last-minute flight deals from Belfast Intl to Washington, D.C.. Data last updated septembre 11, 2025 and is based on user searches.

lun. 10/66:45 amBFS - BWI

2 stops15h 55mMultiple Airlines

lun. 10/136:50 pmBWI - BFS

2 stops20h 45mMultiple Airlines

Deal found 9/10

$630

sam. 10/257:00 amBFS - IAD

2 stops16h 55mMultiple Airlines

sam. 11/110:00 pmIAD - BFS

2 stops19h 45mMultiple Airlines

Deal found 9/10

$989

lun. 10/277:50 amBFS - IAD

3 stops35h 45mMultiple Airlines

lun. 11/35:30 pmIAD - BFS

2 stops22h 40mMultiple Airlines

Deal found 9/11

$757

One-way flights from Belfast Intl to Washington, D.C.
Search for one-way flight options from Belfast Intl to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated septembre 11, 2025.

mar. 10/148:55 pmBFS - BWI

3 stops49h 45mMultiple Airlines

Deal found 9/10

$327

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

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

lun. 10/6

6:45 am-5:40 pm

2 stops15h 55m

Baltimore/Washington

lun. 10/13

6:50 pm-8:35 pm

2 stops20h 45m

$630

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

lun. 10/27

7:50 am-3:35 pm

3 stops35h 45m

Washington, D.C. Dulles Intl

lun. 11/3

5:30 pm-9:10 pm

2 stops22h 40m

$757

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

sam. 10/25

7:00 am-6:55 pm

2 stops16h 55m

Washington, D.C. Dulles Intl

sam. 11/1

10:00 pm-9:45 pm

2 stops19h 45m

$989

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

mar. 10/14

8:55 pm-5:40 pm

3 stops49h 45m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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 $292). Flying from Belfast Intl Airport to Washington, D.C. in April is currently the most expensive (average of $337). 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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$327+ Cheap flights from Belfast Intl (BFS) to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/14. 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.

Round-trip from

One-way 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 septembre 11, 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 septembre 11, 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.

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.?

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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 septembre 11, 2025.