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Cheap flights from Northern Ireland to California from £250

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 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LAX
22 Mar — 29 Mar1
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 20 February 2026.

Fri 24/406:30
BHD
-
SFO
1 stop15h 20m
British Airways
Tue 28/413:28
SFO
-
BHD
2 stops17h 52m
British Airways
Deal found 19/2£602
Fri 6/306:45
BHD
-
LAX
1 stop16h 35m
British Airways
Tue 10/318:40
LAX
-
BHD
1 stop15h 05m
British Airways
Deal found 19/2£609
Thu 19/306:35
BHD
-
ONT
2 stops21h 49m
British Airways
Mon 23/323:58
ONT
-
BHD
2 stops27h 32m
British Airways
Deal found 17/2£622
Wed 4/306:35
BHD
-
LAX
2 stops20h 46m
British Airways
Sun 8/322:00
LAX
-
BHD
1 stop13h 40m
British Airways
Deal found 17/2£631
Fri 13/306:45
BHD
-
SFO
2 stops22h 56m
British Airways
Mon 16/316:59
SFO
-
BHD
2 stops18h 36m
British Airways
Deal found 17/2£642
Wed 1/409:50
BHD
-
LAX
2 stops18h 45m
KLM
Thu 23/409:43
LAX
-
BHD
2 stops15h 37m
KLM
Deal found 20/2£652
Wed 1/411:35
BHD
-
LAX
1 stop16h 55m
American Airlines
Thu 23/420:20
LAX
-
BHD
1 stop15h 05m
American Airlines
Deal found 20/2£660
Wed 1/411:35
BHD
-
LAX
2 stops19h 23m
British Airways
Thu 23/420:55
LAX
-
BHD
1 stop13h 50m
British Airways
Deal found 20/2£677
Wed 18/306:35
BHD
-
LAS
2 stops21h 25m
Finnair
Wed 25/312:39
LAS
-
BHD
2 stops18h 36m
Finnair
Deal found 18/2£692
Wed 18/307:00
BFS
-
LAS
2 stops22h 27m
Multiple Airlines
Wed 25/312:10
LAS
-
BFS
2 stops23h 10m
Multiple Airlines
Deal found 18/2£734
Thu 26/207:05
BFS
-
LAX
2 stops19h 25m
Multiple Airlines
Thu 5/320:15
LAX
-
BFS
2 stops16h 10m
Multiple Airlines
Deal found 20/2£748
Tue 14/407:35
BFS
-
LAX
3 stops42h 45m
Multiple Airlines
Sun 19/420:10
LAX
-
BFS
2 stops17h 20m
Multiple Airlines
Deal found 19/2£756

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 20 February 2026.

Round-trip from

£602

One-way from

£250

Popular in

December

Cheapest in

June

Average price

£822
British Airways
  • British Airways
  • 24/4-28/4
  • 3 total stops
  • 33h 12m total
  • Northern Ireland to California
Search Deals
13/4
  • 13/4
  • 3 total stops
  • 59h 24m total
  • Northern Ireland to California
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£81 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 20 February 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

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 24/4

19:35-13:50

1 stop26h 15m

San Francisco

Tue 28/4

13:28-15:20

2 stops17h 52m

£605

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Fri 6/3

08:45-15:20

1 stop14h 35m

Los Angeles

Tue 10/3

10:24-11:30

2 stops18h 06m

£609

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Thu 19/3

06:35-21:24

2 stops21h 49m

Ontario

Mon 23/3

23:58-10:30

2 stops27h 32m

£622

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Wed 4/3

06:35-15:20

1 stop16h 45m

Los Angeles

Sun 8/3

20:30-18:40

1 stop15h 10m

£626

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 13/3

08:45-21:13

2 stops19h 28m

San Francisco

Mon 16/3

11:30-16:05

2 stops21h 35m

£645

BelfastLas Vegas

BHD - LAS

BHDLAS

Belfast City

Wed 18/3

06:35-21:00

2 stops21h 25m

Las Vegas Harry Reid Intl

Wed 25/3

12:39-14:15

2 stops18h 36m

£692

BelfastLas Vegas

BFS - LAS

BFSLAS

Belfast Intl

Wed 18/3

07:00-22:27

2 stops22h 27m

Las Vegas Harry Reid Intl

Wed 25/3

12:10-18:20

2 stops23h 10m

£734

BelfastLos Angeles

BFS - LAX

BFSLAX

Belfast Intl

Tue 14/4

07:35-18:20

3 stops42h 45m

Los Angeles

Sun 19/4

20:10-21:30

2 stops17h 20m

£756

BelfastLas Vegas

BHD - LAS

BHDLAS

Belfast City

Wed 18/3

07:00-12:33

3 stops36h 33m

Las Vegas Harry Reid Intl

Tue 24/3

01:01-13:35

3 stops29h 34m

£804

BelfastLas Vegas

BHD - LAS

BHDLAS

Belfast City

Fri 6/3

08:45-19:59

2 stops19h 14m

Las Vegas Harry Reid Intl

Tue 10/3

21:55-20:15

1 stop15h 20m

£821

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 42 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 £354). Flying from Northern Ireland to California in December is currently the most expensive (average of £501). 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 20 February 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
1,458 reviews
Check prices

Overall

7.7

Crew

8.4

Comfort

7.6

Boarding

7.8

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,458 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Overall

7.7

Crew

8.4

Comfort

7.6

Boarding

7.8

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
American Airlines
7.2
Good
11,320 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Overall

7.7

Crew

8.4

Comfort

7.6

Boarding

7.8

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,755 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Overall

7.7

Crew

8.4

Comfort

7.6

Boarding

7.8

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 21h 25m. Fly via British Airways or Finnair 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 £354). Flying from Northern Ireland to California in December is currently the most expensive (average of £501). 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

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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 20 February 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£385Average£543FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£470Average£521FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£503Average£646FlexibilityNo 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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