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Cheap flights from California to Northern Ireland from £211

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
19 Apr — 26 Apr1
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 20 March 2026.

Mon 16/1120:40
SFO
-
BHD
1 stop15h 35m
British Airways
Fri 20/1111:30
BHD
-
SFO
1 stop15h 15m
British Airways
Deal found 15/3£579
Wed 22/716:30
LAX
-
BFS
1 stop20h 30m
Multiple Airlines
Wed 12/820:15
BFS
-
LAX
1 stop25h 20m
Multiple Airlines
Deal found 16/3£581
Wed 7/1016:35
SFO
-
BHD
1 stop15h 05m
British Airways
Tue 13/1016:25
BHD
-
SFO
1 stop29h 25m
British Airways
Deal found 15/3£584
Wed 7/1016:35
SFO
-
BHD
1 stop15h 05m
Multiple Airlines
Tue 13/1012:40
BHD
-
SFO
2 stops19h 37m
Multiple Airlines
Deal found 15/3£587
Wed 7/1015:50
SFO
-
BHD
2 stops15h 50m
American Airlines
Tue 13/1012:40
BHD
-
SFO
2 stops19h 32m
American Airlines
Deal found 15/3£589
Sun 6/916:30
LAX
-
BFS
1 stop19h 45m
Multiple Airlines
Sun 13/909:55
BFS
-
LAX
1 stop35h 25m
Multiple Airlines
Deal found 16/3£589
Mon 14/916:30
LAX
-
BFS
1 stop31h 00m
Multiple Airlines
Sat 26/906:20
BFS
-
LAX
1 stop15h 00m
Multiple Airlines
Deal found 17/3£595
Wed 22/716:30
LAX
-
BFS
1 stop20h 30m
Multiple Airlines
Thu 13/821:25
BFS
-
LAX
1 stop24h 10m
Multiple Airlines
Deal found 16/3£597
Mon 24/810:33
LAX
-
BHD
2 stops18h 22m
British Airways
Wed 7/1011:35
BHD
-
LAX
1 stop14h 45m
British Airways
Deal found 17/3£601
Thu 23/716:30
LAX
-
BFS
1 stop34h 15m
Multiple Airlines
Wed 12/820:15
BFS
-
LAX
1 stop25h 20m
Multiple Airlines
Deal found 16/3£602
Tue 18/820:55
LAX
-
BHD
1 stop14h 00m
British Airways
Tue 1/909:40
BHD
-
LAX
1 stop16h 40m
British Airways
Deal found 17/3£603
Sun 26/716:30
LAX
-
BFS
1 stop21h 25m
Multiple Airlines
Wed 12/820:15
BFS
-
LAX
1 stop25h 20m
Multiple Airlines
Deal found 16/3£605

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 20 March 2026.

Round-trip from

£581

One-way from

£211

Popular in

June

Cheapest in

August

Average price

£741
22/7-12/8
  • 22/7-12/8
  • 2 total stops
  • 45h 50m total
  • California to Northern Ireland
Search Deals
12/8
  • 12/8
  • 1 total stop
  • 20h 10m total
  • California to Northern Ireland
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£122 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
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 20 March 2026.
Use the filters below to find and compare flights from California to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Sun 6/9

16:30-20:15

1 stop19h 45m

Belfast Intl

Sun 13/9

09:55-13:20

1 stop35h 25m

£589

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Mon 14/9

16:30-07:30

1 stop31h 00m

Belfast Intl

Sat 26/9

06:20-13:20

1 stop15h 00m

£595
Fastest return journey

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 8/9

13:59-15:20

2 stops17h 21m

Belfast City

Thu 17/9

06:30-13:50

1 stop15h 20m

£618

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Tue 18/8

08:00-10:45

2 stops18h 45m

Belfast City

Tue 1/9

16:25-09:06

2 stops24h 41m

£621

Santa AnaBelfast

SNA - BHD

SNABHD

Santa Ana J. Wayne/Orange Cnty

Wed 2/9

15:09-15:40

2 stops16h 31m

Belfast City

Wed 9/9

10:05-21:51

2 stops19h 46m

£635

Santa AnaBelfast

SNA - BHD

SNABHD

Santa Ana J. Wayne/Orange Cnty

Tue 18/8

11:35-15:20

2 stops19h 45m

Belfast City

Tue 1/9

09:40-21:20

2 stops19h 40m

£641

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Sun 26/4

20:10-21:30

2 stops17h 20m

Belfast Intl

Tue 12/5

19:20-22:05

3 stops34h 45m

£645

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Thu 10/9

16:21-19:25

2 stops19h 04m

Belfast City

Mon 14/9

19:35-13:50

1 stop26h 15m

£668

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Tue 1/9

17:30-18:55

2 stops17h 25m

Belfast City

Sat 12/9

09:35-19:49

2 stops18h 14m

£673

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Tue 12/5

16:05-17:35

2 stops17h 30m

Belfast City

Tue 26/5

09:40-18:20

1 stop16h 40m

£674

Flights are sorted by cheapest return flights first.

Deals found on 20/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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 £695). 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.

How much does it cost for a return flight from California to Northern Ireland?

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 15h 25m. California and Northern Ireland are separated by a distance of 5038 mi. This flight may include one or multiple stops.

  • 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 £695). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for California to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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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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