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Cheap flights from Northern Ireland to California from £319

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 18/1. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LAX
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Northern Ireland to California

Enter your travel dates to find the best prices.

Best flights from Northern Ireland to California
Discover carefully curated flight deals from Northern Ireland to California that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 December 2025.

Wed 4/211:25BHD - LAX
2 stops19h 46mBritish Airways
Sun 8/223:00LAX - BHD
2 stops31h 15mBritish Airways
Deal found 2/12£573
Sat 17/123:10BFS - SFO
3 stops47h 25mMultiple Airlines
Sat 24/110:15SFO - BFS
3 stops25h 40mMultiple Airlines
Deal found 3/12£614
Wed 21/106:35BHD - SNA
2 stops23h 26mBritish Airways
Sun 25/113:54SNA - BHD
2 stops36h 46mBritish Airways
Deal found 2/12£573
Sun 18/123:05BFS - LAX
3 stops47h 55mMultiple Airlines
Sun 25/108:20LAX - BFS
3 stops27h 50mMultiple Airlines
Deal found 4/12£622
Thu 29/106:35BHD - LAX
2 stops18h 30mBritish Airways
Mon 2/221:00LAX - BHD
1 stop15h 15mBritish Airways
Deal found 3/12£597
Sat 17/106:00BFS - LAX
2 stops19h 00mMultiple Airlines
Sat 24/119:30LAX - BFS
2 stops19h 10mMultiple Airlines
Deal found 3/12£657
Thu 15/120:00BHD - SFO
1 stop27h 00mBritish Airways
Mon 19/107:00SFO - BHD
2 stops19h 40mBritish Airways
Deal found 2/12£598
Thu 22/120:00BHD - ONT
2 stops29h 22mBritish Airways
Mon 26/107:16ONT - BHD
2 stops24h 49mBritish Airways
Deal found 2/12£603
Fri 30/106:45BHD - SNA
2 stops22h 10mBritish Airways
Tue 3/216:23SNA - BHD
2 stops19h 52mBritish Airways
Deal found 2/12£603
Tue 27/106:30BFS - LAX
2 stops18h 05mMultiple Airlines
Sat 31/111:35LAX - BFS
1 stop15h 20mMultiple Airlines
Deal found 3/12£763
Thu 22/120:00BHD - SFO
1 stop27h 00mBritish Airways
Mon 26/107:30SFO - BHD
2 stops19h 10mBritish Airways
Deal found 4/12£604
Fri 6/311:30BHD - ONT
2 stops18h 34mBritish Airways
Tue 10/310:56ONT - BHD
2 stops17h 34mBritish Airways
Deal found 4/12£609
Sun 11/123:05BFS - LAS
3 stops29h 34mMultiple Airlines
Sun 25/101:01LAS - BFS
3 stops35h 09mMultiple Airlines
Deal found 3/12£862
Thu 29/120:00BHD - ONT
2 stops30h 45mBritish Airways
Mon 2/215:09ONT - BHD
2 stops16h 56mBritish Airways
Deal found 4/12£609
Thu 29/110:40BHD - SNA
2 stops20h 16mBritish Airways
Mon 2/208:05SNA - BHD
2 stops22h 10mBritish Airways
Deal found 4/12£609
Sun 18/110:40BHD - ONT
2 stops19h 33mBritish Airways
Sun 25/116:45ONT - BHD
2 stops16h 05mBritish Airways
Deal found 4/12£636
Wed 4/212:25BHD - LAS
1 stop14h 25mBritish Airways
Sun 8/222:59LAS - BHD
2 stops27h 41mBritish Airways
Deal found 2/12£722
Thu 15/110:40BHD - LAS
1 stop16h 10mBritish Airways
Mon 19/112:00LAS - BHD
2 stops24h 15mBritish Airways
Deal found 3/12£757
Sun 1/209:10BHD - LAX
1 stop19h 15mBritish Airways
Wed 4/221:00LAX - BHD
1 stop15h 15mBritish Airways
Deal found 2/12£1,062
Mon 2/209:15BHD - ONT
2 stops21h 33mBritish Airways
Fri 6/210:58ONT - BHD
2 stops24h 17mBritish Airways
Deal found 2/12£1,066

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 5 December 2025.

Round-trip from

£512

One-way from

£319

Popular in

February

Cheapest in

June

Average price

£804
American Airlines
  • American Airlines
  • 4/2-8/2
  • 2 total stops
  • 27h 45m total
  • Northern Ireland to California
Search Deals
18/1
  • 18/1
  • 3 total stops
  • 53h 17m total
  • Northern Ireland to California
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£11 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£19 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 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 5 December 2025.
Use the filters below to find and compare flights from Northern Ireland to California that are best for you.

Fly from

Northern Ireland

Fly to

California

Route

Depart

Return

Price

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Wed 4/2

11:25-23:11

2 stops19h 46m

Los Angeles

Sun 8/2

23:00-14:15

2 stops31h 15m

£573

BelfastSanta Ana

BHD - SNA

BHDSNA

Belfast City

Wed 21/1

06:35-22:01

2 stops23h 26m

Santa Ana J. Wayne/Orange Cnty

Sun 25/1

13:54-10:40

2 stops36h 46m

£573

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Thu 29/1

06:35-17:05

2 stops18h 30m

Los Angeles

Mon 2/2

21:00-20:15

1 stop15h 15m

£597

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 15/1

20:00-15:00

1 stop27h 00m

San Francisco

Mon 19/1

07:00-10:40

2 stops19h 40m

£598

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Thu 22/1

20:00-17:22

2 stops29h 22m

Ontario

Mon 26/1

07:16-16:05

2 stops24h 49m

£603

BelfastSanta Ana

BHD - SNA

BHDSNA

Belfast City

Fri 30/1

06:45-20:55

2 stops22h 10m

Santa Ana J. Wayne/Orange Cnty

Tue 3/2

16:23-20:15

2 stops19h 52m

£603

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 22/1

20:00-15:00

1 stop27h 00m

San Francisco

Mon 26/1

07:30-10:40

2 stops19h 10m

£604

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Fri 6/3

11:30-22:04

2 stops18h 34m

Ontario

Tue 10/3

10:56-11:30

2 stops17h 34m

£609

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Thu 29/1

20:00-18:45

2 stops30h 45m

Ontario

Mon 2/2

15:09-16:05

2 stops16h 56m

£609

BelfastSanta Ana

BHD - SNA

BHDSNA

Belfast City

Thu 29/1

10:40-22:56

2 stops20h 16m

Santa Ana J. Wayne/Orange Cnty

Mon 2/2

08:05-14:15

2 stops22h 10m

£609

Flights are sorted by cheapest return flights first.

Deals found on 4/12

Showing 1-10 of 23 results
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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 £358). Flying from Northern Ireland to California in December is currently the most expensive (average of £508). 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 NIR to CA?

Find hourly flight availability from Northern Ireland to California. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 5 December 2025.

When flying from Northern Ireland to California, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 7% versus a flight in the afternoon.

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 5 December 2025.
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
7.7
Good
1,430 reviews
Check prices

Crew

8.4

Food

7.2

Comfort

7.6

Overall

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,430 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Crew

8.4

Food

7.2

Comfort

7.6

Overall

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
American Airlines
7.2
Good
11,044 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Crew

8.4

Food

7.2

Comfort

7.6

Overall

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,561 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Crew

8.4

Food

7.2

Comfort

7.6

Overall

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 19h 46m. Fly via British Airways to get the fastest option. Northern Ireland and California are separated by a distance of 5128 mi.

  • 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 £358). Flying from Northern Ireland to California in December is currently the most expensive (average of £508). 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 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 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£370Average£543FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£475Average£526FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£508Average£616FlexibilityNo 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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