Find flights
When to book
FAQs

Cheap flights from California to Northern Ireland from £237

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
3 Jun — 10 Jun1
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 4 May 2026.

Mon 2/1120:40
SFO
-
BHD
1 stop13h 55m
British Airways
Fri 13/1108:45
BHD
-
SFO
1 stop14h 15m
British Airways
Deal found 30/4£632
Tue 27/1022:00
LAX
-
BHD
1 stop13h 40m
British Airways
Tue 3/1106:35
BHD
-
LAX
1 stop17h 15m
British Airways
Deal found 2/5£641
Mon 9/1117:30
SFO
-
BHD
1 stop14h 35m
British Airways
Wed 11/1119:25
BHD
-
SFO
1 stop27h 35m
British Airways
Deal found 30/4£644
Wed 16/920:55
LAX
-
BHD
1 stop13h 50m
British Airways
Wed 14/1010:05
BHD
-
LAX
1 stop16h 20m
British Airways
Deal found 30/4£649
Mon 2/1109:00
SFO
-
BHD
2 stops17h 40m
American Airlines
Fri 13/1106:45
BHD
-
SFO
2 stops19h 39m
American Airlines
Deal found 30/4£653
Tue 27/1016:30
LAX
-
BHD
1 stop15h 20m
British Airways
Mon 2/1117:45
BHD
-
LAX
1 stop27h 45m
British Airways
Deal found 2/5£653
Tue 27/1014:44
LAX
-
BHD
2 stops17h 06m
American Airlines
Tue 3/1106:35
BHD
-
LAX
1 stop16h 45m
American Airlines
Deal found 2/5£655
Tue 18/816:43
LAX
-
BHD
2 stops18h 12m
British Airways
Tue 1/906:30
BHD
-
LAX
1 stop19h 50m
British Airways
Deal found 3/5£657
Tue 3/1111:35
LAX
-
BHD
2 stops15h 55m
American Airlines
Wed 11/1109:15
BHD
-
LAX
2 stops19h 27m
American Airlines
Deal found 2/5£663
Mon 21/913:35
LAX
-
BHD
2 stops19h 20m
Delta
Wed 14/1017:30
BHD
-
LAX
1 stop26h 20m
Delta
Deal found 30/4£663
Tue 3/1116:47
ONT
-
BHD
2 stops15h 58m
British Airways
Wed 11/1111:25
BHD
-
ONT
2 stops18h 58m
British Airways
Deal found 2/5£664
Mon 17/813:30
LAX
-
BHD
2 stops20h 00m
British Airways
Tue 1/906:30
BHD
-
LAX
1 stop19h 50m
British Airways
Deal found 3/5£666

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 4 May 2026.

Round-trip from

£641

One-way from

£237

Popular in

June

Cheapest in

October

Average price

£828
British Airways
  • British Airways
  • 27/10-3/11
  • 2 total stops
  • 30h 55m total
  • California to Northern Ireland
Search Deals
British Airways
  • British Airways
  • 16/9
  • 2 total stops
  • 16h 35m total
  • California to Northern Ireland
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£126 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 4 May 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 - BHD

LAXBHD

Los Angeles Los Angeles

Mon 21/9

17:10-18:45

1 stop17h 35m

Belfast City

Thu 8/10

09:35-18:25

1 stop16h 50m

£649

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Sun 20/9

20:55-18:45

1 stop13h 50m

Belfast City

Tue 13/10

09:40-18:25

1 stop16h 45m

£649

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Tue 18/8

16:43-18:55

2 stops18h 12m

Belfast City

Tue 1/9

06:30-18:20

1 stop19h 50m

£657

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Mon 21/9

13:35-16:55

2 stops19h 20m

Belfast City

Mon 12/10

17:30-11:50

1 stop26h 20m

£663

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Tue 27/10

14:10-16:50

2 stops19h 40m

Belfast City

Wed 4/11

06:30-17:11

2 stops18h 41m

£678

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Tue 18/8

11:32-16:55

2 stops21h 23m

Belfast City

Fri 4/9

09:50-23:21

2 stops21h 31m

£678

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 17/8

12:33-18:45

2 stops22h 12m

Belfast City

Wed 2/9

20:35-22:04

2 stops33h 29m

£679

Santa AnaBelfast

SNA - BHD

SNABHD

Santa Ana J. Wayne/Orange Cnty

Tue 18/8

16:30-18:55

2 stops18h 25m

Belfast City

Tue 1/9

09:40-19:35

2 stops17h 55m

£687
Fastest return journey

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Tue 27/10

22:00-20:15

1 stop15h 15m

Belfast City

Sun 1/11

06:30-14:30

1 stop15h 00m

£690

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Sat 5/9

11:20-12:25

2 stops17h 05m

Belfast City

Wed 16/9

10:05-19:57

2 stops17h 52m

£701

Flights are sorted by cheapest return flights first.

Deals found on 2/5

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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 £417). Flying from California to Northern Ireland in June is currently the most expensive (average of £893). 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 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 17h 35m. California and Northern Ireland are separated by a distance of 5128 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 £417). Flying from California to Northern Ireland in June is currently the most expensive (average of £893). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for California to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Heathrow flights
John F Kennedy Intl to Heathrow flights
John F Kennedy Intl to Gatwick flights
Newark to Gatwick flights
LaGuardia to Heathrow flights
John F Kennedy Intl to London City flights
John F Kennedy Intl to Stansted flights
Boston to Heathrow flights
Los Angeles to Heathrow flights
Dulles Intl to Heathrow flights
LaGuardia to Gatwick flights
O'Hare Intl to Heathrow flights
San Francisco to Heathrow flights
Baltimore to Heathrow flights
Newark to London City flights
Boston to Gatwick flights
Seattle to Heathrow flights
Newark to Stansted flights
Dallas/Fort Worth to Heathrow flights
Orlando to Heathrow flights
Atlanta to Heathrow flights
Newark to Luton flights
LaGuardia to Stansted flights
Miami to Heathrow flights
Hobby to Heathrow flights
Boston to London City flights
Denver to Heathrow flights
John F Kennedy Intl to Edinburgh flights
Dulles Intl to Gatwick flights
Boston to Stansted flights
Los Angeles to Gatwick flights
Reagan-National to Heathrow flights
Dulles Intl to London City flights
Newark to Edinburgh flights
Los Angeles to Stansted flights
Boston to Edinburgh flights
Los Angeles to London City flights
Baltimore to Gatwick flights
Philadelphia to Heathrow flights
O'Hare Intl to Gatwick flights
Reagan-National to Gatwick flights
George Bush Intcntl to Heathrow flights
O'Hare Intl to Stansted flights
San Francisco to Gatwick flights
San Francisco to London City flights
O'Hare Intl to London City flights
San Francisco to Stansted flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.