$398 Find Cheap Flights from Washington to Northern Ireland

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Good to know

Low seasonOctober
High seasonJuly
Cheapest flight$398
Best time to beat the crowds with an average 40% drop in price.
Most popular time to fly with an average 21% increase in price.
Flight from Portland to Belfast City Airport

FAQs for booking flights from Washington to Northern Ireland

  • How does KAYAK find such low prices on flights from Washington to Northern Ireland?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Northern Ireland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Northern Ireland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington to Northern Ireland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington to Northern Ireland?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Washington to Northern Ireland with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Northern Ireland?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Washington to Northern Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest day to fly to Northern Ireland?

    Based on KAYAK data, the cheapest day to fly to Northern Ireland is Tuesday where round-trip tickets can be as cheap as $724. On the other hand, the most expensive day to fly is Wednesday, where round-trip prices are $1,208 on average.

  • What is the cheapest time of day to fly to Northern Ireland?

    The cheapest time of day to fly to Northern Ireland is generally in the afternoon, when round-trip flights cost $794 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Northern Ireland is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,000.

  • How long is the flight to Northern Ireland?

    An average nonstop flight from Washington to Northern Ireland takes 13h 40m, covering a distance of 4523 miles. The shortest route is Seattle (SEA) to Belfast Intl Airport (BFS) with an average flight time of 12h 05m.

  • What is the most popular destination in Northern Ireland?

    Based on KAYAK flight searches, the most popular destination is Belfast (100% of total searches to Northern Ireland).

Top airline flying from Washington to Northern Ireland

Need help choosing which airline to fly with from Washington to Northern Ireland? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.6
British AirwaysOverall score based on 6842 reviews
6.7Comfort
6.8Boarding
6.4Entertainment
6.3Food
7.6Crew
Airline reviews

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

6.0 GoodAnonymous, Apr 2025SEA - LHR
Read more British Airways reviews

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

The crew could not have been more helpful, my meal was excellent, I slept peacefully until right before landing, and the BA lounge was a godsend. The only negative I encountered was the coffee both on the plane and in the lounge. Not to my taste but that’s a personal preference.

I don’t understand why a reputable airline like BA would delegate their London flights to AA. Makes no sense to me, as most domestic carriers do such a poor job these days. Terminal 3 at LHR is a total dump

Cancelled flight minutes before boarding. Rescheduled flight was two days later

The flight attendants were EXTREMELY personable and appreciated the service, lights going off after dinner (probably the norm, but I haven’t flown evening overnight flights in a while). Thank you!

Business class seats were very dated on my plane. Very little storage, charging ports were not easily accessible, tv screen kept flopping away. Vegetarian food was disappointing: hardly any protein and severely under-seasoned. Crew was lovely.

The food was ok, but not great. They delayed boarding in Portland and did not enforce group boarding. But the crew was excellent, went above and beyond.

The food was pathetic. There wasn't much leg room and recline space for such a long flight. No tea/ coffee for a 2-3 hour connecting flight without purchasing! Really!?

Service was very good. Because I use a cane, I was allowed to use Priority Boarding. Biggest problem was extremely limited leg room in Economy class seats. For airplane food, it was alright.

Was late but that airport/storm fault. Flight was full but comfortable. Food quite nice. Unfortunate that I had a rather miserable attendant, others were much friendlier

Book cheap flights from Washington to Northern Ireland

Recent round-trip flight deals

8/23Sat
2 stopsBritish Airways
27h 31mPDX-BHD
8/31Sun
2 stopsBritish Airways
23h 14mBHD-PDX
$732
8/23Sat
1 stopBritish Airways
13h 50mPDX-BHD
8/31Sun
1 stopBritish Airways
14h 35mBHD-PDX
$741
8/23Sat
2 stopsBritish Airways
27h 31mPDX-BHD
8/31Sun
1 stopBritish Airways
29h 30mBHD-PDX
$747
6/11Wed
2 stops
27h 30mSEA-BFS
6/18Wed
3 stops
37h 11mBFS-SEA
$844
6/10Tue
2 stops
15h 15mSEA-BFS
6/17Tue
2 stops
19h 40mBFS-SEA
$888
6/3Tue
2 stopsAer Lingus
15h 50mSEA-BHD
6/10Tue
2 stopsAer Lingus
18h 50mBHD-SEA
$1,010
5/29Thu
2 stopsAer Lingus
29h 15mSEA-BHD
6/5Thu
2 stopsAer Lingus
30h 25mBHD-SEA
$1,067
6/24Tue
2 stopsKLM
20h 50mPDX-BHD
7/7Mon
1 stopKLM
12h 50mBHD-PDX
$1,466
6/14Sat
1 stopKLM
15h 20mSEA-BHD
6/21Sat
1 stopKLM
30h 30mBHD-SEA
$1,482
6/24Tue
1 stopAmerican Airlines
14h 05mPDX-BHD
7/7Mon
1 stopAmerican Airlines
15h 45mBHD-PDX
$2,085

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Recent one-way flight deals

8/23Sat
2 stopsAmerican Airlines
17h 45mPDX-BHD
$398
8/23Sat
1 stopAmerican Airlines
13h 50mPDX-BHD
$428
8/23Sat
2 stopsBritish Airways
27h 31mPDX-BHD
$435
8/23Sat
1 stopBritish Airways
13h 50mPDX-BHD
$437
5/26Mon
1 stopBritish Airways
14h 05mPDX-BHD
$842
5/26Mon
2 stopsBritish Airways
20h 26mPDX-BHD
$846
8/28Thu
2 stops
43h 40mSEA-BHD
$968
8/28Thu
3 stops
54h 50mSEA-BHD
$1,003
8/28Thu
1 stopBritish Airways
14h 25mSEA-BHD
$1,294
8/27Wed
2 stops
26h 11mSEA-BHD
$1,693

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Last minute flights from Washington to Northern Ireland

Last minute flight, train and bus deals

5/2Fri
multi-stopBritish Airways
16h 25mSEA-BHD
5/12Mon
multi-stopBritish Airways
24h 40mBHD-SEA
$851
5/3Sat
multi-stopBritish Airways
17h 30mSEA-BHD
5/12Mon
multi-stopBritish Airways
23h 40mBHD-SEA
$856
5/2Fri
multi-stopBritish Airways
13h 55mSEA-BHD
5/11Sun
multi-stopBritish Airways
19h 30mBHD-SEA
$873
5/2Fri
multi-stopBritish Airways
17h 55mSEA-BHD
5/11Sun
multi-stopBritish Airways
19h 30mBHD-SEA
$878
5/4Sun
multi-stopDelta
23h 20mSEA-BHD
5/12Mon
multi-stopDelta
26h 15mBHD-SEA
$887
5/4Sun
multi-stopDelta
19h 08mSEA-BHD
5/12Mon
multi-stopDelta
26h 15mBHD-SEA
$888
5/2Fri
multi-stopAmerican Airlines
16h 25mSEA-BHD
5/11Sun
multi-stopAmerican Airlines
12h 40mBHD-SEA
$910
5/2Fri
multi-stopAmerican Airlines
17h 55mSEA-BHD
5/11Sun
multi-stopAmerican Airlines
13h 20mBHD-SEA
$915
5/1Thu
multi-stopKLM
18h 45mSEA-BHD
5/10Sat
multi-stopKLM
30h 32mBHD-SEA
$988
5/1Thu
multi-stopKLM
19h 08mSEA-BHD
5/11Sun
multi-stopKLM
18h 14mBHD-SEA
$997

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Everything you need to know for your flight to Northern Ireland

Cabin class types available on flights to Washington

Cabin classes available on flights to Washington. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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