Find flights
When to book
Airlines

Cheap flights from Belfast Intl Airport to Washington from £294

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 16/1. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
21 Dec — 28 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast Intl to Washington

Keep the following information in mind while searching for Belfast Intl to Washington flight deals. Data was last updated 21 November 2025.

Round-trip from

£1,457

One-way from

£294
3/1-10/1
  • 3/1-10/1
  • 6 total stops
  • 65h 16m total
  • Belfast to Washington
Search Deals
16/1
  • 16/1
  • 3 total stops
  • 40h 13m total
  • Belfast to Washington
Search Deals

Find flight deals from Belfast Intl to Washington

Enter your travel dates to find the best prices.

Best flights from Belfast Intl to Washington
Discover carefully curated flight deals from Belfast Intl to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 November 2025.

Sat 3/112:45BFS - SEA
3 stops41h 31mMultiple Airlines
Sat 10/114:35SEA - BFS
3 stops23h 45mMultiple Airlines
Deal found 19/11£1,457

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl to Washington 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, Cheapflights users made 858,174 searches. Data last updated 21 November 2025.
Use the filters below to find and compare flights from Belfast Intl Airport to Washington that are best for you.

Fly from

Belfast Intl

Fly to

Washington

Route

Depart

Return

Price

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 3/1

12:45-22:16

3 stops41h 31m

Seattle/Tacoma Intl

Sat 10/1

14:35-22:20

3 stops23h 45m

£1,457

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 16/1

06:30-14:43

3 stops40h 13m

£294

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 15/2

22:05-19:57

3 stops53h 52m

£342

Flights are sorted by cheapest return flights first.

Deals found on 20/11

Best time to book a flight from Belfast Intl to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Belfast Intl with our price prediction graph.
Estimated return 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
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 21 November 2025.
Read reviews from past customers who have flown with American Airlines and British Airways from Belfast Intl Airport to Washington. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,047 reviews
Check prices

Overall

7.2

Entertainment

6.9

Boarding

7.5

Crew

8.0

Food

6.4

Comfort

7.2

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.
American Airlines
7.2
Good
11,047 reviews
American Airlines
7.2
Good
11,047 reviews
Check prices

Overall

7.2

Entertainment

6.9

Boarding

7.5

Crew

8.0

Food

6.4

Comfort

7.2

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.
British Airways
6.7
Okay
7,533 reviews
American Airlines
7.2
Good
11,047 reviews
Check prices

Overall

7.2

Entertainment

6.9

Boarding

7.5

Crew

8.0

Food

6.4

Comfort

7.2

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.

Related info for your journey

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

  • Can I find deals for flights from Belfast Intl to Washington that include hotel bookings?

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

  • How can I find direct flights from Belfast Intl to Washington?

    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.

  • Can I find deals for business class flights from Belfast Intl to Washington?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Belfast Intl to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Belfast Intl to Hobby flights
Belfast Intl to John F Kennedy Intl flights
Belfast City to John F Kennedy Intl flights
Belfast Intl to George Bush Intcntl flights
Belfast Intl to Orlando flights
Belfast Intl to Newark flights
Belfast City to Newark flights
Belfast Intl to Miami flights
Belfast Intl to Los Angeles flights
Belfast Intl to Las Vegas flights
Belfast City to Dallas/Fort Worth flights
Belfast Intl to Dallas/Fort Worth flights
Belfast Intl to Dulles Intl flights
Belfast Intl to Baltimore flights
Belfast City to Dulles Intl flights
Belfast City to LaGuardia flights
Belfast City to Las Vegas flights
Belfast City to Oklahoma City flights
Belfast City to Baltimore flights
Belfast City to Orlando flights
Belfast Intl to Seattle flights
Belfast City to Grand Rapids flights
Belfast City to Miami flights
Belfast Intl to Wichita flights
Belfast Intl to O'Hare Intl flights
Belfast City to Seattle flights
Belfast City to Los Angeles flights
Belfast Intl to Boston flights
Belfast Intl to Jacksonville flights
Belfast City to Detroit flights
Belfast Intl to Daytona Beach flights
Belfast City to O'Hare Intl flights
Belfast City to Reagan-National flights
Belfast Intl to San Francisco flights
Belfast City to Boston flights
Belfast Intl to Providence flights
Belfast City to New Orleans flights
Belfast Intl to Atlanta flights
Belfast City to Colorado Springs flights

Top 2 airlines flying from Belfast Intl to Washington

Discover the top 2 airlines that operate flights from Belfast Intl to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 November 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£450Average£531FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£575Average£575FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Belfast Intl to Washington?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Washington from Belfast Intl today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to Washington?

Millions of users choose and trust Cheapflights to book the best flight deals from Belfast Intl to Washington for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Belfast Intl to Washington with no change fees?

Need flexible booking options for your flight to Washington from Belfast Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Belfast Intl to Washington become cheaper?

Yes, Cheapflights offers price alerts on Belfast Intl to Washington flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.