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Cheap flights from California to Northern Ireland from £276

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 21/7. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
28 Apr — 5 May1
1 adult

Cheap flight deals from California to Northern Ireland

Keep the following information in mind while searching for California to Northern Ireland flight deals. Data was last updated 23 April 2025.

Round-trip from

£449

One-way from

£276

Popular in

June

Cheapest in

November

Average price

£611
14/9-25/9
  • 14/9-25/9
  • 2 total stops
  • 48h 10m total
  • California to Northern Ireland
Search Deals
21/7
  • 21/7
  • 2 total stops
  • 27h 25m total
  • California to Northern Ireland
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£49 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from California to Northern Ireland

Cheapest flights from California to Northern Ireland
Explore the most affordable flight options available from California to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 April 2025.

Fri 2/516:30LAX - BFS
1 stop31h 30mMultiple Airlines
Thu 15/521:00BFS - LAX
1 stop25h 10mMultiple Airlines
Deal found 22/4£421
Fri 2/516:30LAX - BHD
1 stop19h 55mMultiple Airlines
Thu 15/520:15BHD - LAX
1 stop25h 55mMultiple Airlines
Deal found 22/4£468
Wed 15/1019:20SFO - BHD
1 stop15h 20mIberia
Mon 20/1009:50BHD - SFO
1 stop36h 00mIberia
Deal found 22/4£498
Wed 5/1120:40SFO - BHD
1 stop14h 30mBritish Airways
Mon 10/1119:30BHD - SFO
1 stop27h 30mBritish Airways
Deal found 22/4£500
Wed 15/1021:30LAX - BHD
1 stop15h 15mBritish Airways
Thu 23/1012:40BHD - LAX
1 stop15h 35mBritish Airways
Deal found 22/4£501
Wed 15/1017:17LAX - BHD
2 stops17h 23mAmerican Airlines
Thu 23/1006:35BHD - LAX
1 stop19h 00mAmerican Airlines
Deal found 22/4£524
Thu 11/914:27SJC - BHD
2 stops17h 03mBritish Airways
Thu 25/909:35BHD - SJC
2 stops20h 47mBritish Airways
Deal found 22/4£532
Tue 8/716:35SFO - BHD
1 stop14h 45mAmerican Airlines
Tue 16/909:35BHD - SFO
2 stops20h 22mAmerican Airlines
Deal found 22/4£541
Wed 29/1009:59LAX - BHD
2 stops23h 51mDelta
Wed 5/1117:20BHD - LAX
1 stop26h 25mDelta
Deal found 21/4£551
Thu 11/913:35LAX - BHD
1 stop13h 35mFinnair
Thu 25/916:20BHD - LAX
2 stops34h 13mFinnair
Deal found 22/4£561
Thu 11/908:43ONT - BHD
2 stops18h 27mBritish Airways
Thu 25/912:40BHD - ONT
2 stops17h 00mBritish Airways
Deal found 22/4£569
Thu 5/607:30SFO - BFS
3 stops24h 45mMultiple Airlines
Thu 12/606:00BFS - SFO
3 stops40h 35mMultiple Airlines
Deal found 22/4£678

Cheapflights Fare Finder

Customise your flight search to find flights from California to Northern Ireland 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 23 April 2025.
Use the filters below to find and compare flights from California to Northern Ireland that are best for you.

Fly from

California

Fly to

Northern Ireland

Route

Depart

Return

Price

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Sun 14/9

16:30-21:30

1 stop21h 00m

Belfast Intl

Thu 25/9

19:00-14:10

1 stop27h 10m

£449

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 15/10

19:20-18:40

1 stop15h 20m

Belfast City

Mon 20/10

09:50-13:50

1 stop36h 00m

£498

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 15/10

21:30-20:45

1 stop15h 15m

Belfast City

Thu 23/10

12:40-20:15

1 stop15h 35m

£501

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 15/10

11:00-11:55

2 stops16h 55m

Belfast City

Mon 20/10

18:30-16:24

2 stops29h 54m

£510

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Thu 11/9

16:30-15:30

1 stop15h 00m

Belfast City

Wed 24/9

07:05-14:10

1 stop15h 05m

£513

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 15/10

17:17-18:40

2 stops17h 23m

Belfast City

Thu 23/10

06:35-17:35

1 stop19h 00m

£524

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Thu 11/9

14:28-15:30

2 stops17h 02m

Belfast City

Thu 25/9

09:35-17:25

1 stop15h 50m

£525

San JoseBelfast

SJC - BHD

SJCBHD

San Jose

Thu 11/9

14:27-15:30

2 stops17h 03m

Belfast City

Thu 25/9

09:35-22:22

2 stops20h 47m

£532

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Thu 11/9

13:35-11:10

1 stop13h 35m

Belfast City

Thu 25/9

16:20-18:33

2 stops34h 13m

£561

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 11/9

08:43-11:10

2 stops18h 27m

Belfast City

Thu 25/9

12:40-21:40

2 stops17h 00m

£569

Flights are sorted by cheapest return flights first.

Deals found on 22/4

Showing 1-10 of 33 results
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Best time to book a flight from California to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from California 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 California to Northern Ireland

What is the cheapest month to book a flight from California to Northern Ireland?

Currently, January is the cheapest month in which you can book a flight from California to Northern Ireland (average of £67). Flying from California to Northern Ireland in July is currently the most expensive (average of £90). 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 CA to NIR?

Find hourly flight availability from California to Northern Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 April 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from California to Northern Ireland as you normally would.

Rainfall in Northern Ireland by month

Plan your trip to Northern Ireland by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Northern Ireland ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Northern Ireland when rainfall is around 50.0 mm.

Temperature in Northern Ireland by month

Plan your trip to Northern Ireland by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Northern Ireland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Northern Ireland

Get insights into the airlines that provide service to Northern Ireland. 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 Northern Ireland. Reviews last updated 23 April 2025.
To help decide which airline to fly from California to Northern Ireland, see what other customers have to say about Delta, KLM and Finnair. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,920 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,920 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,272 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from California to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from California to Northern Ireland one-way?

    The cheapet airlines for a one-way flight from California to Northern Ireland are British Airways (£302), Delta (£328), and KLM (£2,846).

  • Can I find deals for flights from California to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on California to Northern Ireland flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from California to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to Northern Ireland.

  • Can I find deals for business class flights from California to Northern Ireland?

    Yes. Cheapflights offers flight deals from California to Northern Ireland 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 California to Northern Ireland?

    Currently, January is the cheapest month in which you can book a flight from California to Northern Ireland (average of £67). Flying from California to Northern Ireland in July is currently the most expensive (average of £90). 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 California to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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