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Cheap flights from Northern Ireland to California from £332

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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LAX
6 Jun — 13 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Northern Ireland to California

Enter your travel dates to find the best prices.

Cheapest flights from Northern Ireland to California
Explore the most affordable flight options available from Northern Ireland to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 May 2026.

Wed 2/910:05
BHD
-
ONT
2 stops20h 53m
British Airways
Sun 6/923:59
ONT
-
BHD
2 stops35h 26m
British Airways
Deal found 4/5£660
Wed 11/1111:25
BHD
-
LAX
1 stop15h 05m
British Airways
Sun 15/1121:55
LAX
-
BHD
2 stops27h 10m
British Airways
Deal found 4/5£676
Wed 2/906:30
BHD
-
SNA
2 stops35h 12m
British Airways
Sun 6/916:30
SNA
-
BHD
2 stops42h 55m
British Airways
Deal found 4/5£685
Wed 2/910:05
BHD
-
LAX
1 stop16h 15m
British Airways
Sun 6/920:55
LAX
-
BHD
1 stop13h 50m
British Airways
Deal found 4/5£695
Thu 4/621:10
BFS
-
LAX
2 stops32h 45m
Multiple Airlines
Thu 11/618:25
LAX
-
BFS
2 stops16h 55m
Multiple Airlines
Deal found 5/5£706
Wed 4/1106:35
BHD
-
SNA
2 stops24h 15m
British Airways
Sun 8/1111:42
SNA
-
BHD
2 stops18h 13m
British Airways
Deal found 4/5£710
Wed 3/613:50
BFS
-
LAX
2 stops35h 00m
Multiple Airlines
Wed 10/619:10
LAX
-
BFS
2 stops19h 10m
Multiple Airlines
Deal found 6/5£721
Thu 5/1106:35
BHD
-
SFO
1 stop16h 25m
British Airways
Mon 9/1120:40
SFO
-
BHD
1 stop15h 35m
British Airways
Deal found 2/5£722
Thu 3/920:35
BHD
-
SFO
1 stop25h 15m
British Airways
Sun 6/921:30
SFO
-
BHD
2 stops27h 20m
British Airways
Deal found 4/5£730
Thu 5/1106:35
BHD
-
SFO
1 stop16h 25m
British Airways
Sun 8/1111:24
SFO
-
BHD
2 stops21h 26m
British Airways
Deal found 5/5£749
Sun 17/506:10
BFS
-
LAX
1 stop20h 00m
Multiple Airlines
Sat 23/520:55
LAX
-
BFS
1 stop27h 45m
Multiple Airlines
Deal found 2/5£762
Wed 1/720:10
BFS
-
LAX
2 stops54h 59m
Multiple Airlines
Tue 7/705:35
LAX
-
BFS
2 stops33h 45m
Multiple Airlines
Deal found 5/5£765

Find flight deals from Northern Ireland to California

Keep the following information in mind while searching for Northern Ireland to California flight deals. Data was last updated 7 May 2026.

Round-trip from

£660

One-way from

£332

Popular in

December

Cheapest in

June

Average price

£463
British Airways
  • British Airways
  • 2/9-6/9
  • 4 total stops
  • 56h 19m total
  • Northern Ireland to California
Search Deals
12/5
  • 12/5
  • 3 total stops
  • 52h 20m total
  • Northern Ireland to California
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£72 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£22 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 Northern Ireland to California 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 7 May 2026.
Use the filters below to find and compare flights from Northern Ireland to California that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Wed 2/9

10:05-22:58

2 stops20h 53m

Ontario

Sun 6/9

23:59-19:25

2 stops35h 26m

£660

BelfastSanta Ana

BHD - SNA

BHDSNA

Belfast City

Wed 2/9

06:30-09:42

2 stops35h 12m

Santa Ana J. Wayne/Orange Cnty

Sun 6/9

16:30-19:25

2 stops42h 55m

£685
Fastest return journey

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Wed 2/9

10:05-18:20

1 stop16h 15m

Los Angeles

Sun 6/9

20:55-18:45

1 stop13h 50m

£695

BelfastLos Angeles

BFS - LAX

BFSLAX

Belfast Intl

Thu 4/6

21:10-21:55

2 stops32h 45m

Los Angeles

Thu 11/6

18:25-19:20

2 stops16h 55m

£706

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 3/9

20:35-13:50

1 stop25h 15m

San Francisco

Sun 6/9

21:30-08:50

2 stops27h 20m

£731

BelfastLos Angeles

BFS - LAX

BFSLAX

Belfast Intl

Sun 17/5

06:10-18:10

1 stop20h 00m

Los Angeles

Sat 23/5

20:55-08:40

1 stop27h 45m

£762

BelfastLos Angeles

BFS - LAX

BFSLAX

Belfast Intl

Wed 1/7

20:10-19:09

2 stops54h 59m

Los Angeles

Tue 7/7

20:35-23:20

1 stop18h 45m

£765

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Tue 16/6

21:25-15:55

2 stops26h 30m

San Francisco

Tue 23/6

17:40-21:20

2 stops19h 40m

£842

BelfastLas Vegas

BFS - LAS

BFSLAS

Belfast Intl

Mon 1/6

21:25-22:29

3 stops33h 04m

Las Vegas Harry Reid Intl

Wed 10/6

06:45-19:15

3 stops28h 30m

£858

BelfastLas Vegas

BFS - LAS

BFSLAS

Belfast Intl

Thu 27/8

07:30-18:35

2 stops19h 05m

Las Vegas Harry Reid Intl

Thu 3/9

20:25-22:50

2 stops18h 25m

£900

Flights are sorted by cheapest return flights first.

Deals found on 6/5

Showing 1-10 of 45 resultsSorted by cheapest first
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Best time to book a flight from Northern Ireland to California

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

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

Currently, November is the cheapest month in which you can book a flight from Northern Ireland to California (average of £351). Flying from Northern Ireland to California in December is currently the most expensive (average of £485). 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 Northern Ireland to California?

Reviews of airlines servicing California

Get insights into the airlines that provide service to California. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to California. Reviews last updated 7 May 2026.
Read through reviews of airlines operating flights from Northern Ireland to California, such as KLM,American Airlines, andBritish Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,511 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,511 reviews
KLM
7.8
Good
1,511 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
American Airlines
7.1
Good
11,669 reviews
KLM
7.8
Good
1,511 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
7,949 reviews
KLM
7.8
Good
1,511 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from Northern Ireland to California. 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 Northern Ireland to California?

    There are many flights that can get you from Northern Ireland to California in 16h 45m. Fly via British Airways, KLM, or American Airlines to get the fastest option. Northern Ireland and California are separated by a distance of 4902 mi. This flight may include one or multiple stops.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Northern Ireland to California (average of £351). Flying from Northern Ireland to California in December is currently the most expensive (average of £485). 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 Northern Ireland to California

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Northern Ireland to California

Discover the top 3 airlines that operate flights from Northern Ireland to California. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 May 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£382Average£539FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£466Average£517FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£499Average£604FlexibilityNo cancel feeOn-time75%
Search KLM 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 Northern Ireland to California?

Cheapflights makes it easy to find Northern Ireland to California 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 Northern Ireland to California?

Cheapflights simply makes it quick and affordable to book flights from Northern Ireland to California by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Northern Ireland to California with no change fees?

Need flexible booking options for your flight to California from Northern Ireland? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes! Start tracking prices for Northern Ireland to California flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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