$252+ Cheap flights from Dulles Intl (IAD) to Belfast Intl (BFS)
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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BFS
Oct 26 — Nov 21
Round-trip
1 adult, Economy
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Find cheap flights from Dulles Intl to Belfast Intl with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Dulles Intl to Belfast Intl
Cheapest
Best
Last-minute
One-way
Cheapest flights from Dulles Intl to Belfast IntlExplore the most affordable flight options available from Dulles Intl to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 26, 2026.
Explore the most affordable flight options available from Dulles Intl to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 26, 2026.
This Mytrip deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:40 pm -
2 stops20h 15m
Tue 11/178:35 am -
2 stops14h 55m
Deal found 9/26![Multiple Airlines logo]()
$734
This Mytrip deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:40 pm -
2 stops19h 50m
Sun 11/159:00 pm -
2 stops23h 45m
Deal found 9/24![Multiple Airlines logo]()
$809
This Mytrip deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/277:40 pm -
3 stops21h 20m
Wed 12/21:20 pm -
3 stops30h 55m
Deal found 9/26![Multiple Airlines logo]()
$837
This Mytrip deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:40 pm -
2 stops13h 30m
Mon 11/306:25 pm -
3 stops25h 15m
Deal found 9/26![Multiple Airlines logo]()
$1,062
This Mytrip deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/510:35 pm -
2 stops17h 20m
Wed 10/76:00 am -
2 stops18h 00m
Deal found 9/26![Multiple Airlines logo]()
$1,119
Best flights from Dulles Intl to Belfast IntlDiscover carefully curated flight deals from Dulles Intl to Belfast Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 26, 2026.
Discover carefully curated flight deals from Dulles Intl to Belfast Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 26, 2026.
This Mytrip deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:40 pm -
2 stops20h 15m
Tue 11/178:35 am -
2 stops14h 55m
Deal found 9/26![Multiple Airlines logo]()
$734
This Mytrip deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:40 pm -
2 stops19h 50m
Sun 11/159:00 pm -
2 stops23h 45m
Deal found 9/24![Multiple Airlines logo]()
$809
This Mytrip deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/277:40 pm -
2 stops20h 00m
Wed 12/21:20 pm -
3 stops30h 55m
Deal found 9/26![Multiple Airlines logo]()
$842
This Mytrip deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/18:50 pm -
2 stops18h 45m
Thu 1/77:15 am -
3 stops36h 30m
Deal found 9/25![Multiple Airlines logo]()
$969
This Mytrip deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/297:40 pm -
3 stops17h 55m
Tue 2/28:35 pm -
3 stops27h 30m
Deal found 9/22![Multiple Airlines logo]()
$986
This Mytrip deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:40 pm -
2 stops13h 30m
Mon 11/306:25 pm -
3 stops25h 15m
Deal found 9/26![Multiple Airlines logo]()
$1,062
Last-minute flights from Dulles Intl to Belfast IntlDiscover last-minute flight deals from Dulles Intl to Belfast Intl. Data last updated September 26, 2026 and is based on user searches.
Discover last-minute flight deals from Dulles Intl to Belfast Intl. Data last updated September 26, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/510:35 pm -
2 stops17h 20m
Wed 10/76:00 am -
2 stops18h 00m
Deal found 9/26![Multiple Airlines logo]()
$1,119
This Mytrip deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/58:30 pm -
2 stops14h 45m
Tue 10/68:55 pm -
3 stops27h 05m
Deal found 9/26![Multiple Airlines logo]()
$1,158
One-way flights from Dulles Intl to Belfast IntlSearch for one-way flight options from Dulles Intl to Belfast Intl. Find affordable one-way fares based on user searches. Data last updated September 26, 2026.
Search for one-way flight options from Dulles Intl to Belfast Intl. Find affordable one-way fares based on user searches. Data last updated September 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/510:33 pm -
3 stops41h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/212:06 pm -
3 stops49h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/307:40 pm -
3 stops56h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$270
This Kiwi.com deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:40 pm -
2 stops32h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/308:40 pm -
3 stops56h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Multiple Airlines logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2910:30 pm -
3 stops28h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/37:40 pm -
3 stops19h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$342
Find flight deals from Dulles Intl to Belfast Intl
Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Belfast Intl (BFS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 26, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $734 (Mytrip) |
One-way from | $252 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from Dulles Intl to Belfast Intl 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 7,457,451 searches. Data last updated September 26, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Washington, D.C.Belfast
IAD Washington, D.C. Dulles Intl - BFS Belfast Intl
IADBFS
Washington, D.C. Dulles Intl
Sat 12/5
10:33 pm-8:35 pm
3 stops41h 02m
Belfast Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$252
Washington, D.C.Belfast
IAD Washington, D.C. Dulles Intl - BFS Belfast Intl
IADBFS
Washington, D.C. Dulles Intl
Tue 12/1
7:40 pm-9:00 am
2 stops32h 20m
Belfast Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$273
Washington, D.C.Belfast
IAD Washington, D.C. Dulles Intl - BFS Belfast Intl
IADBFS
Washington, D.C. Dulles Intl
Fri 10/30
8:40 pm-9:10 am
3 stops56h 30m
Belfast Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$275
Washington, D.C.Belfast
IAD Washington, D.C. Dulles Intl - BFS Belfast Intl
IADBFS
Washington, D.C. Dulles Intl
Wed 12/2
7:40 pm-7:45 pm
2 stops19h 05m
Belfast Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$282
Quickest round-trip
Washington, D.C.Belfast
IAD Washington, D.C. Dulles Intl - BFS Belfast Intl
IADBFS
Washington, D.C. Dulles Intl
Fri 3/19
6:15 pm-12:30 pm
2 stops14h 15m
Belfast Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$438
Washington, D.C.Belfast
IAD Washington, D.C. Dulles Intl - BFS Belfast Intl
IADBFS
Washington, D.C. Dulles Intl
Sat 11/28
5:15 pm-2:20 pm
2 stops16h 05m
Belfast Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$452
Washington, D.C.Belfast
IAD Washington, D.C. Dulles Intl - BFS Belfast Intl
IADBFS
Washington, D.C. Dulles Intl
Tue 11/10
7:40 pm-8:55 pm
2 stops20h 15m
Belfast Intl
Tue 11/17
8:35 am-6:30 pm
2 stops14h 55m
$734
Washington, D.C.Belfast
IAD Washington, D.C. Dulles Intl - BFS Belfast Intl
IADBFS
Washington, D.C. Dulles Intl
Sun 11/8
7:40 pm-8:30 pm
2 stops19h 50m
Belfast Intl
Sun 11/15
9:00 pm-3:45 pm
2 stops23h 45m
$809
Washington, D.C.Belfast
IAD Washington, D.C. Dulles Intl - BFS Belfast Intl
IADBFS
Washington, D.C. Dulles Intl
Fri 11/27
7:40 pm-8:40 pm
2 stops20h 00m
Belfast Intl
Wed 12/2
1:20 pm-3:15 pm
3 stops30h 55m
$842
Washington, D.C.Belfast
IAD Washington, D.C. Dulles Intl - BFS Belfast Intl
IADBFS
Washington, D.C. Dulles Intl
Fri 1/1
8:50 pm-8:35 pm
2 stops18h 45m
Belfast Intl
Thu 1/7
7:15 am-2:45 pm
3 stops36h 30m
$969
Showing 1-10 of 12 resultsSorted by cheapest first
Compare providers for flights from Dulles Intl to Belfast Intl
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 Dulles Intl to Belfast Intl in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Belfast Intl Airport flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Washington, D.C. Dulles Intl Airport-Belfast Intl Airport flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Belfast Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Belfast Intl Airport flights, Cheapflights users trust Ovago the most. Ovago 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 Washington, D.C. Dulles Intl Airport-Belfast Intl Airport 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 Dulles Intl to Belfast Intl
Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from Dulles Intl with our price prediction graph.
IAD-BFS
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.
Related info for your journey
Find useful and relevant information for your journey from Dulles Intl to Belfast Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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