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Cheap flights from Northern Ireland to California from £337

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 30/8. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LAX
5 Jul — 12 Jul1
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 5 June 2026.

Thu 5/1109:05
BHD
-
LAX
1 stop17h 25m
British Airways
Sat 21/1118:00
LAX
-
BHD
1 stop14h 45m
British Airways
Deal found 3/6£514
Tue 15/909:40
BHD
-
LAX
2 stops18h 51m
British Airways
Thu 1/1021:00
LAX
-
BHD
1 stop15h 35m
British Airways
Deal found 3/6£540
Wed 2/1211:25
BHD
-
ONT
2 stops18h 35m
British Airways
Sun 6/1212:46
ONT
-
BHD
2 stops20h 04m
British Airways
Deal found 3/6£569
Sun 1/1106:30
BHD
-
LAS
1 stop20h 20m
British Airways
Sat 7/1115:58
LAS
-
BHD
2 stops16h 47m
British Airways
Deal found 4/6£593
Tue 15/920:25
BHD
-
SNA
2 stops27h 20m
British Airways
Thu 1/1012:14
SNA
-
BHD
2 stops19h 16m
British Airways
Deal found 3/6£608
Wed 26/811:35
BHD
-
SFO
1 stop13h 55m
American Airlines
Fri 4/915:46
SFO
-
BHD
2 stops20h 49m
American Airlines
Deal found 4/6£632
Tue 14/713:45
BHD
-
LAX
2 stops19h 09m
British Airways
Tue 21/720:55
LAX
-
BHD
1 stop15h 40m
British Airways
Deal found 4/6£633
Tue 25/809:40
BHD
-
SFO
2 stops22h 05m
American Airlines
Fri 4/915:46
SFO
-
BHD
2 stops20h 49m
American Airlines
Deal found 4/6£636
Tue 25/816:25
BHD
-
SFO
1 stop29h 25m
British Airways
Fri 4/911:00
SFO
-
BHD
2 stops20h 30m
British Airways
Deal found 4/6£666
Fri 28/806:30
BHD
-
SFO
2 stops21h 18m
American Airlines
Fri 4/916:35
SFO
-
BHD
1 stop17h 35m
American Airlines
Deal found 4/6£666
Thu 5/1111:05
BHD
-
ONT
2 stops18h 54m
British Airways
Sat 21/1116:47
ONT
-
BHD
2 stops15h 58m
British Airways
Deal found 3/6£669
Thu 2/709:50
BHD
-
SFO
2 stops23h 09m
Delta
Thu 9/708:55
SFO
-
BHD
2 stops24h 00m
Delta
Deal found 4/6£683

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 June 2026.

Round-trip from

£514

One-way from

£337
British Airways
  • British Airways
  • 5/11-21/11
  • 2 total stops
  • 32h 10m total
  • Northern Ireland to California
Search Deals
30/8
  • 30/8
  • 3 total stops
  • 42h 45m total
  • Northern Ireland to California
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 June 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

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Thu 5/11

11:05-23:15

2 stops20h 10m

Los Angeles

Sat 21/11

18:00-16:45

1 stop14h 45m

£540

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Wed 2/12

11:25-22:00

2 stops18h 35m

Ontario

Sun 6/12

12:46-16:50

2 stops20h 04m

£569

BelfastLas Vegas

BHD - LAS

BHDLAS

Belfast City

Sun 1/11

06:30-19:50

1 stop20h 20m

Las Vegas Harry Reid Intl

Sat 7/11

15:58-16:45

2 stops16h 47m

£593

BelfastSanta Ana

BHD - SNA

BHDSNA

Belfast City

Tue 15/9

20:25-15:45

2 stops27h 20m

Santa Ana J. Wayne/Orange Cnty

Thu 1/10

12:14-15:30

2 stops19h 16m

£608

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Tue 14/7

13:45-00:54

2 stops19h 09m

Los Angeles

Tue 21/7

20:55-20:35

1 stop15h 40m

£633

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Tue 25/8

16:25-13:50

1 stop29h 25m

San Francisco

Fri 4/9

11:00-15:30

2 stops20h 30m

£666

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Thu 5/11

11:05-21:59

2 stops18h 54m

Ontario

Sat 21/11

16:47-16:45

2 stops15h 58m

£669

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 2/7

17:30-16:26

2 stops30h 56m

San Francisco

Thu 9/7

13:45-16:55

1 stop19h 10m

£683

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 2/7

09:50-00:59

2 stops23h 09m

San Francisco

Thu 9/7

08:55-16:55

2 stops24h 00m

£683

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Fri 17/7

09:35-19:45

2 stops18h 10m

Los Angeles

Fri 24/7

20:55-20:35

1 stop15h 40m

£686

Flights are sorted by cheapest return flights first.

Deals found on 2/6

Showing 1-10 of 60 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 £392). Flying from Northern Ireland to California in January is currently the most expensive (average of £531). 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 5 June 2026.
Read through reviews of airlines operating flights from Northern Ireland to California, such as British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
8,027 reviews
Check prices

Food

6.4

Comfort

6.8

Entertainment

6.4

Boarding

6.9

Overall

6.7

Crew

7.7

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
8,027 reviews
British Airways
6.7
Okay
8,027 reviews
Check prices

Food

6.4

Comfort

6.8

Entertainment

6.4

Boarding

6.9

Overall

6.7

Crew

7.7

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

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 20h 10m. Fly via British Airways, KLM, or Delta to get the fastest option. Northern Ireland and California are separated by a distance of 5128 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 £392). Flying from Northern Ireland to California in January is currently the most expensive (average of £531). 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 airline flying from Northern Ireland to California

Discover the top airline 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 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£427Average£600FlexibilityNo cancel feeOn-time70%
Search British Airways 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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