Find flights
When to book
Airlines
FAQs

Cheap flights from Northern Ireland to California from £249

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 15/3. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LAX
20 Feb — 27 Feb1
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 21 January 2026.

Mon 2/314:15
BFS
-
LAX
2 stops34h 20m
Multiple Airlines
Mon 9/320:10
LAX
-
BFS
2 stops18h 00m
Multiple Airlines
Deal found 20/1£463
Sat 19/907:05
BHD
-
LAX
1 stop19h 20m
British Airways
Tue 22/915:45
LAX
-
BHD
1 stop15h 35m
British Airways
Deal found 19/1£466
Mon 7/906:30
BHD
-
LAX
1 stop15h 15m
British Airways
Thu 17/915:45
LAX
-
BHD
1 stop15h 45m
British Airways
Deal found 21/1£468
Wed 4/306:35
BHD
-
LAX
1 stop17h 15m
British Airways
Sun 8/318:40
LAX
-
BHD
1 stop15h 10m
British Airways
Deal found 18/1£473
Fri 4/911:00
BHD
-
LAX
1 stop17h 15m
American Airlines
Wed 16/917:05
LAX
-
BHD
1 stop14h 35m
American Airlines
Deal found 21/1£484
Sun 6/911:00
BHD
-
LAX
1 stop15h 25m
British Airways
Wed 16/915:45
LAX
-
BHD
1 stop13h 50m
British Airways
Deal found 21/1£487
Wed 11/212:25
BHD
-
ONT
2 stops40h 59m
British Airways
Sun 15/223:58
ONT
-
BHD
2 stops32h 07m
British Airways
Deal found 18/1£491
Thu 12/210:40
BHD
-
ONT
2 stops19h 49m
British Airways
Mon 16/223:58
ONT
-
BHD
2 stops48h 17m
British Airways
Deal found 20/1£500
Fri 30/108:45
BHD
-
SNA
2 stops21h 16m
British Airways
Tue 3/209:30
SNA
-
BHD
2 stops23h 15m
British Airways
Deal found 18/1£505
Fri 13/319:35
BHD
-
SFO
1 stop27h 25m
British Airways
Mon 16/310:36
SFO
-
BHD
2 stops20h 39m
British Airways
Deal found 18/1£508
Fri 24/420:10
BHD
-
SFO
1 stop25h 40m
British Airways
Tue 28/416:35
SFO
-
BHD
1 stop15h 50m
British Airways
Deal found 18/1£520
Wed 11/311:25
BHD
-
LAS
2 stops18h 36m
British Airways
Sun 15/318:45
LAS
-
BHD
2 stops16h 55m
British Airways
Deal found 19/1£553

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 21 January 2026.

Round-trip from

£463

One-way from

£249

Popular in

December

Cheapest in

June

Average price

£472
2/3-9/3
  • 2/3-9/3
  • 4 total stops
  • 52h 20m total
  • Northern Ireland to California
Search Deals
15/3
  • 15/3
  • 2 total stops
  • 51h 00m total
  • Northern Ireland to California
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£76 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 21 January 2026.
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

BFS - LAX

BFSLAX

Belfast Intl

Mon 2/3

14:15-16:35

2 stops34h 20m

Los Angeles

Mon 9/3

20:10-21:10

2 stops18h 00m

£463

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Wed 4/3

11:25-18:30

1 stop15h 05m

Los Angeles

Sun 8/3

22:02-07:40

2 stops26h 38m

£473

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Thu 12/2

11:05-22:29

2 stops19h 24m

Ontario

Mon 16/2

12:18-18:35

2 stops22h 17m

£491

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Wed 11/2

12:25-21:24

2 stops40h 59m

Ontario

Sun 15/2

23:58-16:05

2 stops32h 07m

£491

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Fri 6/2

19:35-15:50

1 stop28h 15m

Los Angeles

Tue 10/2

07:15-10:30

2 stops19h 15m

£500

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 13/3

19:35-16:00

1 stop27h 25m

San Francisco

Mon 16/3

10:36-14:15

2 stops20h 39m

£508

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 24/4

06:30-13:50

1 stop15h 20m

San Francisco

Tue 28/4

16:35-16:25

1 stop15h 50m

£520

BelfastLas Vegas

BHD - LAS

BHDLAS

Belfast City

Wed 11/3

11:25-23:01

2 stops18h 36m

Las Vegas Harry Reid Intl

Sun 15/3

18:45-18:40

2 stops16h 55m

£553

BelfastLas Vegas

BHD - LAS

BHDLAS

Belfast City

Fri 20/2

08:45-18:50

1 stop18h 05m

Las Vegas Harry Reid Intl

Tue 24/2

10:00-14:50

2 stops20h 50m

£568

BelfastLas Vegas

BHD - LAS

BHDLAS

Belfast City

Fri 6/2

06:45-18:50

1 stop20h 05m

Las Vegas Harry Reid Intl

Tue 10/2

06:03-10:30

2 stops20h 27m

£597

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 32 results
1
2
3
4

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 £355). Flying from Northern Ireland to California in December is currently the most expensive (average of £502). 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.

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 21 January 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
7.7
Good
1,442 reviews
Check prices

Overall

7.7

Crew

8.4

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,442 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Overall

7.7

Crew

8.4

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
American Airlines
7.2
Good
11,168 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Overall

7.7

Crew

8.4

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,690 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Overall

7.7

Crew

8.4

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 15h 05m. 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 £355). Flying from Northern Ireland to California in December is currently the most expensive (average of £502). 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 Northern Ireland to California

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

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 21 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£367Average£523FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£471Average£522FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£504Average£611FlexibilityNo 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.

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.