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Cheap flights from Northern Ireland to California from £314

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 21/8. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LAX
11 Jul — 18 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 11 June 2026.

Tue 14/709:40
BHD
-
LAX
2 stops20h 23m
Iberia
Tue 21/716:15
LAX
-
BHD
1 stop15h 05m
Iberia
Deal found 10/6£555
Tue 7/716:25
BHD
-
LAX
1 stop27h 15m
American Airlines
Sun 19/718:10
LAX
-
BHD
1 stop16h 35m
American Airlines
Deal found 7/6£560
Tue 7/706:30
BHD
-
ONT
2 stops24h 02m
American Airlines
Mon 20/714:15
ONT
-
BHD
2 stops19h 15m
American Airlines
Deal found 7/6£564
Fri 4/906:30
BHD
-
ONT
2 stops24h 29m
British Airways
Tue 8/912:33
ONT
-
BHD
2 stops22h 22m
British Airways
Deal found 7/6£567
Wed 9/919:40
BHD
-
ONT
2 stops35h 56m
British Airways
Sun 13/912:37
ONT
-
BHD
2 stops23h 58m
British Airways
Deal found 7/6£575
Wed 8/717:30
BHD
-
SFO
1 stop26h 15m
KLM
Wed 15/717:07
SFO
-
BHD
2 stops15h 48m
KLM
Deal found 10/6£594
Thu 23/717:30
BHD
-
LAX
1 stop26h 20m
Virgin Atlantic
Mon 27/716:45
LAX
-
BHD
1 stop16h 10m
Virgin Atlantic
Deal found 10/6£600
Tue 7/709:40
BHD
-
LAX
1 stop34h 00m
American Airlines
Fri 17/713:16
LAX
-
BHD
2 stops18h 14m
American Airlines
Deal found 7/6£603
Wed 8/720:35
BHD
-
LAX
1 stop23h 05m
British Airways
Wed 15/720:55
LAX
-
BHD
1 stop15h 40m
British Airways
Deal found 10/6£604
Wed 8/720:35
BHD
-
LAX
1 stop23h 05m
British Airways
Sat 18/720:55
LAX
-
BHD
1 stop14h 25m
British Airways
Deal found 7/6£606
Wed 8/711:35
BHD
-
LAX
2 stops18h 32m
American Airlines
Sat 18/708:00
LAX
-
BHD
2 stops18h 05m
American Airlines
Deal found 7/6£607
Thu 9/716:35
BHD
-
ONT
2 stops37h 59m
American Airlines
Sun 19/714:15
ONT
-
BHD
2 stops19h 25m
American Airlines
Deal found 7/6£607

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 11 June 2026.

Round-trip from

£555

One-way from

£314

Popular in

June

Cheapest in

October

Average price

£871
Iberia
  • Iberia
  • 14/7-21/7
  • 3 total stops
  • 35h 28m total
  • Northern Ireland to California
Search Deals
21/8
  • 21/8
  • 3 total stops
  • 45h 27m total
  • Northern Ireland to California
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£46 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 June 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 11 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

Tue 14/7

09:40-22:03

2 stops20h 23m

Los Angeles

Tue 21/7

23:48-12:00

2 stops28h 12m

£555

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Tue 7/7

06:30-22:32

2 stops24h 02m

Ontario

Thu 16/7

06:11-18:45

2 stops28h 34m

£564

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Wed 8/7

16:05-19:59

2 stops35h 54m

Ontario

Sun 19/7

12:35-17:40

2 stops21h 05m

£564

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Tue 7/7

06:30-22:32

2 stops24h 02m

Ontario

Mon 20/7

14:15-17:30

2 stops19h 15m

£564

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Fri 4/9

06:30-22:59

2 stops24h 29m

Ontario

Tue 8/9

12:33-18:55

2 stops22h 22m

£567

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Wed 2/12

06:35-22:19

2 stops23h 44m

Ontario

Sun 6/12

06:00-13:55

2 stops23h 55m

£567

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Wed 9/9

19:40-23:36

2 stops35h 56m

Ontario

Sun 13/9

12:37-20:35

2 stops23h 58m

£575

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Thu 23/7

17:30-11:50

1 stop26h 20m

Los Angeles

Mon 27/7

16:45-16:55

1 stop16h 10m

£600

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Wed 8/7

20:35-11:40

1 stop23h 05m

Los Angeles

Sun 19/7

20:55-18:45

1 stop13h 50m

£606

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Tue 7/7

17:30-20:06

2 stops34h 36m

San Francisco

Tue 14/7

07:00-09:20

2 stops18h 20m

£610

Flights are sorted by cheapest return flights first.

Deals found on 7/6

Showing 1-10 of 51 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, August is the cheapest month in which you can book a flight from Northern Ireland to California (average of £429). Flying from Northern Ireland to California in September is currently the most expensive (average of £738). 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 11 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
8,044 reviews
Check prices

Overall

6.7

Boarding

6.9

Comfort

6.8

Crew

7.7

Food

6.4

Entertainment

6.4

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
8,044 reviews
British Airways
6.7
Okay
8,044 reviews
Check prices

Overall

6.7

Boarding

6.9

Comfort

6.8

Crew

7.7

Food

6.4

Entertainment

6.4

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 23m. Fly via Iberia, American Airlines, or British Airways 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, August is the cheapest month in which you can book a flight from Northern Ireland to California (average of £429). Flying from Northern Ireland to California in September is currently the most expensive (average of £738). 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 11 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£429Average£612FlexibilityNo 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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