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Cheap flights from Philadelphia to Northern Ireland from £435

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BFS
3 Jan — 10 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Philadelphia to Northern Ireland

Enter your travel dates to find the best prices.

Cheapest flights from Philadelphia to Northern Ireland
Explore the most affordable flight options available from Philadelphia to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 December 2025.

Wed 3/1216:05PHL - BHD
2 stops13h 10mBritish Airways
Wed 10/1215:40BHD - PHL
2 stops25h 00mBritish Airways
Deal found 2/12£505
Wed 3/1219:50PHL - BHD
1 stop13h 25mAmerican Airlines
Wed 10/1206:35BHD - PHL
1 stop11h 30mAmerican Airlines
Deal found 2/12£552
Tue 30/1218:35PHL - BHD
1 stop10h 55mBritish Airways
Tue 6/106:35BHD - PHL
2 stops36h 25mBritish Airways
Deal found 1/12£575
Tue 30/1217:40PHL - BFS
2 stops23h 55mMultiple Airlines
Tue 6/120:55BFS - PHL
3 stops22h 52mMultiple Airlines
Deal found 1/12£959
Wed 3/1207:50PHL - BFS
3 stops31h 50mMultiple Airlines
Wed 10/1206:30BFS - PHL
2 stops21h 16mMultiple Airlines
Deal found 2/12£1,099
Tue 2/1217:30PHL - BFS
2 stops13h 50mMultiple Airlines
Tue 9/1206:30BFS - PHL
3 stops21h 16mMultiple Airlines
Deal found 1/12£1,183
Tue 30/1215:30PHL - BHD
2 stops24h 00mMultiple Airlines
Tue 6/106:55BHD - PHL
3 stops22h 01mMultiple Airlines
Deal found 1/12£1,193

Find flight deals from Philadelphia to Northern Ireland

Keep the following information in mind while searching for Philadelphia to Northern Ireland flight deals. Data was last updated 4 December 2025.

Round-trip from

£435

Popular in

June

Cheapest in

January
British Airways
  • British Airways
  • 25/3-3/4
  • 2 total stops
  • 31h 45m total
  • Philadelphia to Northern Ireland
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£135 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Philadelphia to Northern Ireland 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 4 December 2025.
Use the filters below to find and compare flights from Philadelphia to Northern Ireland that are best for you.

Fly from

Philadelphia

Fly to

Northern Ireland

Route

Depart

Return

Price

PhiladelphiaBelfast

PHL - BHD

PHLBHD

Philadelphia

Wed 25/3

19:35-19:10

1 stop19h 35m

Belfast City

Fri 3/4

09:30-16:40

1 stop12h 10m

£435

PhiladelphiaBelfast

PHL - BHD

PHLBHD

Philadelphia

Tue 28/4

18:45-10:35

1 stop10h 50m

Belfast City

Sat 9/5

07:05-16:40

1 stop14h 35m

£463

PhiladelphiaBelfast

PHL - BHD

PHLBHD

Philadelphia

Wed 11/2

18:35-10:15

1 stop10h 40m

Belfast City

Sun 15/2

06:30-16:15

1 stop14h 45m

£468

PhiladelphiaBelfast

PHL - BHD

PHLBHD

Philadelphia

Wed 28/1

18:35-10:15

1 stop10h 40m

Belfast City

Sun 1/2

20:25-16:15

1 stop24h 50m

£468

PhiladelphiaBelfast

PHL - BFS

PHLBFS

Philadelphia

Sat 17/1

15:30-22:40

3 stops26h 10m

Belfast Intl

Sat 24/1

06:00-22:46

3 stops21h 46m

£616

PhiladelphiaBelfast

PHL - BFS

PHLBFS

Philadelphia

Thu 15/1

06:00-20:40

3 stops33h 40m

Belfast Intl

Thu 22/1

06:30-22:03

2 stops20h 33m

£786

PhiladelphiaBelfast

PHL - BFS

PHLBFS

Philadelphia

Fri 16/1

15:30-15:10

3 stops18h 40m

Belfast Intl

Mon 19/1

19:20-14:47

3 stops24h 27m

£812

PhiladelphiaBelfast

PHL - BFS

PHLBFS

Philadelphia

Thu 22/1

17:40-19:30

2 stops20h 50m

Belfast Intl

Sat 24/1

22:25-16:05

2 stops22h 40m

£865

PhiladelphiaBelfast

PHL - BFS

PHLBFS

Philadelphia

Mon 2/3

17:30-13:10

2 stops14h 40m

Belfast Intl

Fri 6/3

18:00-14:47

3 stops25h 47m

£868

PhiladelphiaBelfast

PHL - BFS

PHLBFS

Philadelphia

Wed 25/3

08:19-13:45

3 stops25h 26m

Belfast Intl

Fri 3/4

08:20-14:46

3 stops35h 26m

£901

Flights are sorted by cheapest return flights first.

Deals found on 2/12

Best time to book a flight from Philadelphia to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Philadelphia 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 Philadelphia to Northern Ireland

What is the cheapest month to book a flight from Philadelphia to Northern Ireland?

Currently, January is the cheapest month in which you can book a flight from Philadelphia to Northern Ireland (average of £467). Flying from Philadelphia to Northern Ireland in December is currently the most expensive (average of £739). 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.

Related info for your journey

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

  • What airport do you fly from for flights from Philadelphia to Northern Ireland?

    For a flight from Philadelphia to Northern Ireland, you will be flying from Philadelphia. Philadelphia (PHL) is just 7.0 mi from the center of the city.

  • How long is the flight from Philadelphia to Northern Ireland?

    For as low as £435, British Airways can have you in Northern Ireland from Philadelphia in 19h 35m. The distance between Philadelphia and Northern Ireland is about 3260 mi.

  • Can I find deals for flights from Philadelphia to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Northern Ireland flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Northern Ireland.

  • Can I find deals for business class flights from Philadelphia to Northern Ireland?

    Yes. Cheapflights offers flight deals from Philadelphia to Northern Ireland 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 Philadelphia to Northern Ireland?

    Currently, January is the cheapest month in which you can book a flight from Philadelphia to Northern Ireland (average of £467). Flying from Philadelphia to Northern Ireland in December is currently the most expensive (average of £739). 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.

See more FAQs

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Alternative routes for Philadelphia to Northern Ireland

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How does Cheapflights help users find flights from Philadelphia to Northern Ireland?

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