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Northern Ireland

$280+ Cheap flights from California to Northern Ireland

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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
1 adult, Economy
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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 January 6, 2026.

Round-trip from

$574
(American Airlines)

One-way from

$280
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$700
From California to Northern Ireland
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One-way flight from California to Northern Ireland
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Highest demand for flights based on searches. 16% potential increase in price ($184 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 6, 2026.

This British Airways deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/253:30 pmLAX - BHD
1 stop17h 05mBritish Airways
Sun 3/18:25 pmBHD - LAX
1 stop25h 05mBritish Airways
Deal found 1/5$602
This oojo deal was found by Cheapflights users on 1/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/28:50 amLAX - BHD
2 stops17h 50mBritish Airways
Mon 2/95:45 pmBHD - LAX
1 stop27h 45mBritish Airways
Deal found 1/4$622
This British Airways deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/278:40 pmSFO - BHD
1 stop14h 35mBritish Airways
Tue 3/311:25 amBHD - SFO
1 stop15h 20mBritish Airways
Deal found 1/5$627
This American Airlines deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/237:25 pmLAX - BHD
1 stop13h 50mAmerican Airlines
Tue 2/36:35 amBHD - LAX
1 stop16h 45mAmerican Airlines
Deal found 1/6$634
This British Airways deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/205:02 pmONT - BHD
2 stops16h 13mBritish Airways
Fri 2/278:45 amBHD - ONT
2 stops21h 22mBritish Airways
Deal found 1/6$641
This British Airways deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/42:37 pmLAX - BHD
2 stops17h 58mBritish Airways
Sun 3/86:30 amBHD - LAX
2 stops19h 10mBritish Airways
Deal found 1/5$642
This British Airways deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:39 pmONT - BHD
2 stops20h 31mBritish Airways
Sun 3/19:10 amBHD - ONT
2 stops22h 49mBritish Airways
Deal found 1/5$642
This British Airways deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/42:48 pmSNA - BHD
2 stops17h 47mBritish Airways
Sun 3/88:25 pmBHD - SNA
2 stops32h 31mBritish Airways
Deal found 1/5$642
This KLM deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/1812:41 pmONT - BHD
2 stops20h 09mKLM
Tue 2/35:20 pmBHD - ONT
2 stops30h 55mKLM
Deal found 1/6$647
This oojo deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/1911:53 pmLAX - BHD
2 stops27h 37mBritish Airways
Sun 3/298:10 pmBHD - LAX
2 stops31h 36mBritish Airways
Deal found 1/5$650
This British Airways deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/159:00 pmSFO - BHD
1 stop15h 30mBritish Airways
Wed 1/213:40 pmBHD - SFO
2 stops38h 54mBritish Airways
Deal found 1/6$652
This Air France deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/151:55 pmSFO - BHD
1 stop18h 55mMultiple Airlines
Wed 1/215:20 pmBHD - SFO
1 stop26h 30mMultiple Airlines
Deal found 1/6$685

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated January 6, 2026.
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 - BHD

LAXBHD

Los Angeles

Wed 3/4

9:00 pm-7:10 pm

1 stop14h 10m

Belfast City

Sun 3/8

6:30 am-3:50 pm

1 stop17h 20m

$602

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 2/25

3:30 pm-4:35 pm

1 stop17h 05m

Belfast City

Sun 3/1

8:25 pm-1:30 pm

1 stop25h 05m

$602

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Thu 2/19

2:37 pm-4:40 pm

2 stops18h 03m

Belfast City

Thu 2/26

9:05 am-3:50 pm

1 stop14h 45m

$622

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Mon 2/2

8:50 am-10:40 am

2 stops17h 50m

Belfast City

Mon 2/9

5:45 pm-1:30 pm

1 stop27h 45m

$622

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 3/4

5:30 pm-4:35 pm

1 stop15h 05m

Belfast City

Sun 3/8

9:10 am-3:00 pm

1 stop13h 50m

$627

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Fri 2/27

8:40 pm-7:15 pm

1 stop14h 35m

Belfast City

Tue 3/3

11:25 am-6:45 pm

1 stop15h 20m

$627

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 2/20

5:02 pm-5:15 pm

2 stops16h 13m

Belfast City

Fri 2/27

8:45 am-10:07 pm

2 stops21h 22m

$641

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 3/4

7:00 am-4:35 pm

2 stops25h 35m

Belfast City

Sun 3/8

10:40 am-11:59 pm

2 stops20h 19m

$642

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 2/25

2:39 pm-7:10 pm

2 stops20h 31m

Belfast City

Sun 3/1

9:10 am-11:59 pm

2 stops22h 49m

$642

Santa AnaBelfast

SNA - BHD

SNABHD

Santa Ana J. Wayne/Orange Cnty

Wed 3/4

2:48 pm-4:35 pm

2 stops17h 47m

Belfast City

Sun 3/8

8:25 pm-9:56 pm

2 stops32h 31m

$642

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 60 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 round-trip 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, March is the cheapest month in which you can book a flight from California to Northern Ireland (average of $585). Flying from California to Northern Ireland in June is currently the most expensive (average of $927). 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 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 January 6, 2026.
Peruse reviews from past customers who have flown with British Airways from California to Northern Ireland to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,657 reviews

Comfort

6.7

Overall

6.7

Crew

7.6

Food

6.4

Entertainment

6.4

Boarding

6.9

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.
British Airways
6.7
Okay
7,657 reviews
British Airways
6.7
Okay
7,657 reviews

Comfort

6.7

Overall

6.7

Crew

7.6

Food

6.4

Entertainment

6.4

Boarding

6.9

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.

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.

  • How long is the flight from California to Northern Ireland?

    A quick flight from California to Northern Ireland can take about 14h 10m. British Airways provides one of the quickest options available for as low as $602. The distance between California and Northern Ireland is about 5128 mi. This flight may include one or multiple stops.

  • 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 vacation 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, March is the cheapest month in which you can book a flight from California to Northern Ireland (average of $585). Flying from California to Northern Ireland in June is currently the most expensive (average of $927). 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

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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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Top airline flying from California to Northern Ireland

Discover the top airline that operate flights from California to Northern Ireland. 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 2,558,603 searches. Data last updated January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$599Average$882FlexibilityNo cancel feeOn-time70%

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