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Cheap flights from California to Northern Ireland from £204

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 31/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
16 Jan — 23 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from California to Northern Ireland

Enter your travel dates to find the best prices.

Cheapest flights from California to Northern Ireland
Explore the most affordable flight options available from California to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2025.

Wed 24/1215:37SFO - BHD
2 stops31h 53mBritish Airways
Tue 30/1219:25BHD - SFO
2 stops33h 40mBritish Airways
Deal found 16/12£1,111
Wed 24/1221:20LAX - BHD
2 stops35h 30mDelta
Tue 30/1217:20BHD - LAX
1 stop26h 25mDelta
Deal found 14/12£1,175
Wed 24/1221:00LAX - BHD
1 stop29h 20mAer Lingus
Tue 30/1206:35BHD - LAX
1 stop17h 15mAer Lingus
Deal found 14/12£1,227
Wed 24/1210:53SJC - BHD
2 stops36h 37mBritish Airways
Tue 30/1219:25BHD - SJC
2 stops35h 14mBritish Airways
Deal found 16/12£1,258
Wed 24/1215:01OAK - BHD
2 stops32h 29mBritish Airways
Tue 30/1219:25BHD - OAK
2 stops32h 27mBritish Airways
Deal found 16/12£1,265
Wed 24/1212:50SFO - BFS
1 stop35h 30mMultiple Airlines
Tue 30/1206:00BFS - SFO
1 stop19h 00mMultiple Airlines
Deal found 16/12£1,362
Wed 24/1212:50SFO - BHD
1 stop34h 40mMultiple Airlines
Tue 30/1206:35BHD - SFO
1 stop18h 25mMultiple Airlines
Deal found 16/12£1,401
Wed 24/1212:45ONT - BHD
2 stops34h 45mBritish Airways
Tue 30/1211:25BHD - ONT
2 stops18h 27mBritish Airways
Deal found 14/12£1,625
Tue 23/1206:00SJC - BHD
2 stops21h 30mFinnair
Sun 4/112:10BHD - SJC
2 stops41h 03mFinnair
Deal found 15/12£1,644
Tue 23/1210:10SFO - BHD
2 stops17h 20mFinnair
Sun 4/112:10BHD - SFO
2 stops39h 34mFinnair
Deal found 15/12£1,644
Mon 22/1206:00SJC - BHD
2 stops45h 30mFinnair
Sun 4/112:10BHD - SJC
2 stops41h 03mFinnair
Deal found 15/12£1,652
Mon 22/1210:10SFO - BHD
2 stops41h 20mFinnair
Sun 4/112:10BHD - SFO
2 stops39h 34mFinnair
Deal found 15/12£1,652

Find flight deals from California to Northern Ireland

Keep the following information in mind while searching for California to Northern Ireland flight deals. Data was last updated 17 December 2025.

Round-trip from

£448

One-way from

£204

Popular in

June

Cheapest in

October

Average price

£819
British Airways
  • British Airways
  • 23/1-3/2
  • 2 total stops
  • 29h 10m total
  • California to Northern Ireland
Search Deals
31/1
  • 31/1
  • 3 total stops
  • 58h 51m total
  • California to Northern Ireland
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£103 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from California 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 17 December 2025.
Use the filters below to find and compare flights from California to Northern Ireland that are best for you.

Fly from

California

Fly to

Northern Ireland

Route

Depart

Return

Price

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 25/2

18:00-16:35

1 stop14h 35m

Belfast City

Wed 11/3

06:35-14:30

1 stop14h 55m

£448

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Fri 23/1

21:00-19:15

1 stop14h 15m

Belfast City

Tue 3/2

10:00-15:50

1 stop13h 50m

£451

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 13/1

17:30-14:50

1 stop13h 20m

Belfast City

Tue 20/1

06:35-15:00

1 stop16h 25m

£463

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Sun 11/1

06:30-10:20

2 stops19h 50m

Belfast City

Sun 18/1

17:35-18:30

1 stop32h 55m

£463

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 2/2

17:30-18:35

1 stop17h 05m

Belfast City

Thu 19/2

09:05-15:00

1 stop13h 55m

£464

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 12/1

20:40-20:15

1 stop15h 35m

Belfast City

Tue 27/1

08:45-15:00

1 stop14h 15m

£466

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 11/2

15:30-14:15

1 stop14h 45m

Belfast City

Sun 15/2

20:25-18:30

1 stop30h 05m

£466

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 19/1

17:30-16:05

1 stop14h 35m

Belfast City

Sun 25/1

06:30-15:00

1 stop16h 30m

£485

San JoseBelfast

SJC - BHD

SJCBHD

San Jose

Mon 2/2

12:50-16:05

2 stops19h 15m

Belfast City

Thu 19/2

20:00-22:26

2 stops34h 26m

£485

San JoseBelfast

SJC - BHD

SJCBHD

San Jose

Tue 13/1

12:50-16:45

2 stops19h 55m

Belfast City

Tue 20/1

19:25-21:29

2 stops34h 04m

£485

Flights are sorted by cheapest return flights first.

Deals found on 14/12

Showing 1-10 of 54 results
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Best time to book a flight from California to Northern Ireland

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

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

Currently, March is the cheapest month in which you can book a flight from California to Northern Ireland (average of £437). Flying from California to Northern Ireland in June is currently the most expensive (average of £692). 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.

What is the cheapest time of day to fly from CA to NIR?

Find hourly flight availability from California to Northern Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 December 2025.

One of the essential ways to save on airfare from California to Northern Ireland is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at midday could potentially save you up to 25% on airfare.

Related info for your journey

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

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

    Departing from California to Northern Ireland will take you 14h 35m. California and Northern Ireland are separated by a distance of 5128 mi.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from California to Northern Ireland (average of £437). Flying from California to Northern Ireland in June is currently the most expensive (average of £692). 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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Fly with Cheapflights

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

Cheapflights makes it easy to find California to Northern Ireland flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from California to Northern Ireland?

Millions of users choose and trust Cheapflights to book the best flight deals from California to Northern Ireland 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 California to Northern Ireland with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from California to Northern Ireland flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from California to Northern Ireland become cheaper?

Of course! You can now track prices for flights from California to Northern Ireland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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