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Flights from Washington D.C. to Belfast

Find flight deals from Washington D.C. to Belfast for the next 3 months. Book one way flights from $337 or round trip flights from $677.

      • IAD 10:25 PM
        14h 10m
        1 stop
        BHD 5:35 PM
        Washington D.C. - Belfast | Thu, May 14 | British Airways
        BHD 6:20 PM
        28h 5m
        1 stop
        IAD 5:25 PM
        Belfast - Washington D.C. | Thu, May 21 | British Airways
        $677 $845
        20% off
        20% off
        $845 $677
      • IAD 7:15 PM
        13h 20m
        1 stop
        BHD 1:35 PM
        Washington D.C. - Belfast | Fri, May 1 | British Airways
        BHD 11:00 AM
        11h 25m
        1 stop
        IAD 5:25 PM
        Belfast - Washington D.C. | Tue, May 5 | British Airways
        $694 $845
        18% off
        18% off
        $845 $694
      • IAD 5:40 PM
        10h 40m
        1 stop
        BHD 9:20 AM
        Washington D.C. - Belfast | Tue, May 5 | Virgin Atlantic
        BHD 5:30 PM
        27h 5m
        1 stop
        IAD 3:35 PM
        Belfast - Washington D.C. | Mon, May 11 | Virgin Atlantic
        $704 $845
        17% off
        17% off
        $845 $704
      • IAD 5:40 PM
        10h 40m
        1 stop
        BHD 9:20 AM
        Washington D.C. - Belfast | Tue, May 5 | Delta Air Lines
        BHD 5:30 PM
        27h 5m
        1 stop
        IAD 3:35 PM
        Belfast - Washington D.C. | Mon, May 11 | Virgin Atlantic
        $709
        16% off
        $845 $709
      • IAD 6:10 PM
        17h 45m
        1 stop
        BHD 4:55 PM
        Washington D.C. - Belfast | Fri, May 1 | Delta Air Lines
        BHD 9:50 AM
        10h 45m
        1 stop
        IAD 3:35 PM
        Belfast - Washington D.C. | Tue, May 5 | Virgin Atlantic
        $709
        16% off
        $845 $709
      • IAD 10:25 PM
        12h 5m
        1 stop
        BHD 3:30 PM
        Washington D.C. - Belfast | Sun, Apr 19 | British Airways
        BHD 9:40 AM
        12h 45m
        1 stop
        IAD 5:25 PM
        Belfast - Washington D.C. | Wed, Apr 22 | British Airways
        $718
        15% off
        $845 $718
      • IAD 5:40 PM
        18h 15m
        1 stop
        BHD 4:55 PM
        Washington D.C. - Belfast | Tue, Apr 21 | Virgin Atlantic
        BHD 5:30 PM
        27h 5m
        1 stop
        IAD 3:35 PM
        Belfast - Washington D.C. | Wed, Apr 29 | KLM
        $731
        13% off
        $845 $731
      • IAD 5:40 PM
        10h 40m
        1 stop
        BHD 9:20 AM
        Washington D.C. - Belfast | Tue, Apr 21 | KLM
        BHD 9:50 AM
        10h 45m
        1 stop
        IAD 3:35 PM
        Belfast - Washington D.C. | Wed, Apr 29 | KLM
        $731
        13% off
        $845 $731
      • IAD 5:40 PM
        11h 50m
        1 stop
        BHD 10:30 AM
        Washington D.C. - Belfast | Tue, May 5 | British Airways
        BHD 7:05 PM
        27h 20m
        1 stop
        IAD 5:25 PM
        Belfast - Washington D.C. | Mon, May 11 | British Airways
        $731
        13% off
        $845 $731
      • IAD 6:10 PM
        10h 10m
        1 stop
        BHD 9:20 AM
        Washington D.C. - Belfast | Fri, May 1 | Virgin Atlantic
        BHD 9:50 AM
        10h 45m
        1 stop
        IAD 3:35 PM
        Belfast - Washington D.C. | Tue, May 5 | KLM
        $735
        13% off
        $845 $735
      • WAS 1:00 PM
        17h 25m
        1 stop
        BFS Invalid Date
        Washington D.C. - Belfast | Mon, Apr 20 | Normal Airline
        BFS 3:00 PM
        6h
        Nonstop
        WAS 4:00 PM
        Belfast - Washington D.C. | Wed, Apr 22 | Normal Airline
        Find more flights
        Find more flights
      • IAD 10:25 PM
        12h 5m
        1 stop
        BHD 3:30 PM
        Washington D.C. - Belfast | Thu, May 7 | British Airways
        $337 $533
        37% off
        37% off
        $533 $337
      • IAD 5:40 PM
        10h 40m
        1 stop
        BHD 9:20 AM
        Washington D.C. - Belfast | Thu, May 7 | Virgin Atlantic
        $346 $533
        35% off
        35% off
        $533 $346
      • IAD 5:40 PM
        10h 40m
        1 stop
        BHD 9:20 AM
        Washington D.C. - Belfast | Thu, May 7 | Delta Air Lines
        $348 $533
        35% off
        35% off
        $533 $348
      • IAD 5:40 PM
        10h 20m
        1 stop
        BHD 9:00 AM
        Washington D.C. - Belfast | Tue, May 19 | British Airways
        $426
        20% off
        $533 $426
      • IAD 10:25 PM
        14h 5m
        1 stop
        BHD 5:30 PM
        Washington D.C. - Belfast | Mon, May 18 | British Airways
        $426
        20% off
        $533 $426
      • IAD 5:40 PM
        15h 10m
        1 stop
        BFS 1:50 PM
        Washington D.C. - Belfast | Mon, Apr 27 | British Airways
        $450
        16% off
        $533 $450
      • IAD 10:55 PM
        19h 15m
        1 stop
        BFS 11:10 PM
        Washington D.C. - Belfast | Mon, Apr 27 | Delta Air Lines
        $456
        14% off
        $533 $456
      • IAD 7:15 PM
        10h 15m
        1 stop
        BHD 10:30 AM
        Washington D.C. - Belfast | Sun, Apr 26 | British Airways
        $456
        14% off
        $533 $456
      • IAD 10:55 PM
        19h 15m
        1 stop
        BFS 11:10 PM
        Washington D.C. - Belfast | Sun, Apr 26 | Virgin Atlantic
        $459
        14% off
        $533 $459
      • IAD 5:40 PM
        10h 40m
        1 stop
        BHD 9:20 AM
        Washington D.C. - Belfast | Sun, Apr 26 | Delta Air Lines
        $463
        13% off
        $533 $463
      • WAS 1:00 PM
        17h 25m
        1 stop
        BFS Invalid Date
        Washington D.C. - Belfast | Mon, Apr 20 | Normal Airline
        Find more flights
        Find more flights

Displayed flight fares from Washington D.C. to Belfast are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight Info | Washington D.C. to Belfast

The distance between Washington D.C. and Belfast is approximately 5,435.71 km. Based on Trip.com's data travel demand peaks in August. The off-season for travel is September.

Cheapest one-way flight price$337
Cheapest round-trip ticket price$677
Off-season for travelSeptember
Peak season for travelAugust
Flight distance5,435.71 km
Flight statistics for the Washington D.C.–Belfast route are based on aggregated booking data from Trip.com over the past 12 months.

Frequently Asked Questions

  • What are the cheapest flights from Washington D.C. to Belfast (WAS-BFS)?

    Based on Trip.com data, British Airways offers one-way fares as low as $337 on Cheapest nonstop routes (e.g. IAD to BHD on Thu, May 7), while British Airways offers Cheapest nonstop round-trips from $677 departing on Thu, May 14 and returning on Thu, May 21.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Washington D.C. to Belfast is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Washington D.C. to Belfast, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, May 7, with one-way flights priced at just $337.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is British Airways.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Belfast travel is around August.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Washington D.C. to Belfast is September, when demand for travel is lower.
  • After crunching the numbers on our April flight calendar, it's currently cheapest to fly from Washington D.C. to Belfast on April 29, 2026 with British Airways, with prices starting at $694.
  • The time difference between Belfast and Washington D.C. is 5h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.