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Northern Ireland

$316+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
May 30 — Jun 61
Sat 5/30
Sat 6/6
1 adult, Economy
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Cheap 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 April 30, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/28:40 pm
SFO
-
BHD
1 stop13h 55m
British Airways
Fri 11/138:45 am
BHD
-
SFO
1 stop14h 15m
British Airways
Deal found 4/29$858
This Cheapflightsfares deal was found by Cheapflights users on 4/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/138:55 pm
LAX
-
BHD
1 stop15h 40m
British Airways
Thu 9/176:30 am
BHD
-
LAX
1 stop19h 50m
British Airways
Deal found 4/25$869
This oojo deal was found by Cheapflights users on 4/26. 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 8/174:35 pm
SFO
-
BHD
1 stop14h 55m
British Airways
Mon 9/77:35 pm
BHD
-
SFO
1 stop26h 15m
British Airways
Deal found 4/26$870
This British Airways deal was found by Cheapflights users on 4/29. 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.
Sun 12/65:30 pm
SFO
-
BHD
1 stop17h 10m
British Airways
Thu 12/108:00 pm
BHD
-
SFO
1 stop27h 00m
British Airways
Deal found 4/29$875
This British Airways deal was found by Cheapflights users on 4/27. 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.
Mon 11/163:30 pm
LAX
-
BHD
1 stop14h 45m
British Airways
Thu 11/1911:05 am
BHD
-
LAX
1 stop15h 25m
British Airways
Deal found 4/27$887
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Mon 11/22:06 pm
SFO
-
BHD
2 stops17h 59m
American Airlines
Fri 11/136:45 am
BHD
-
SFO
2 stops19h 39m
American Airlines
Deal found 4/29$888
This British Airways deal was found by Cheapflights users on 4/26. 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.
Tue 8/258:30 am
LAX
-
BHD
2 stops18h 15m
British Airways
Tue 9/81:45 pm
BHD
-
LAX
2 stops18h 58m
British Airways
Deal found 4/26$901
This FlightHub deal was found by Cheapflights users on 4/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/171:30 pm
LAX
-
BHD
2 stops20h 00m
British Airways
Wed 9/210:05 am
BHD
-
LAX
1 stop16h 15m
British Airways
Deal found 4/26$903
This American Airlines deal was found by Cheapflights users on 4/26. 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.
Tue 8/184:20 pm
LAX
-
BHD
1 stop17h 15m
American Airlines
Tue 9/14:25 pm
BHD
-
LAX
1 stop27h 05m
American Airlines
Deal found 4/26$912
This British Airways deal was found by Cheapflights users on 4/26. 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.
Sun 8/168:55 pm
LAX
-
BHD
1 stop13h 50m
British Airways
Wed 9/211:35 am
BHD
-
LAX
1 stop14h 45m
British Airways
Deal found 4/26$914
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:45 pm
LAX
-
BFS
1 stop35h 20m
Multiple Airlines
Thu 9/39:25 pm
BFS
-
LAX
2 stops28h 40m
Multiple Airlines
Deal found 4/26$915
This British Airways deal was found by Cheapflights users on 4/26. 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.
Tue 8/188:55 pm
LAX
-
BHD
1 stop27h 55m
British Airways
Thu 9/36:30 am
BHD
-
LAX
1 stop19h 50m
British Airways
Deal found 4/26$924

Find 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 April 30, 2026.

Round-trip from

$869
(Cheapflightsfares)

One-way from

$316
(oojo)

Popular in

June

Cheapest in

October
From California to Northern Ireland
Search Deals
One-way flight from California to Northern Ireland
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($233 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($47 potential savings vs. average RT price).
Search Deals

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 April 30, 2026.
Use the filters below to find and compare flights from California to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Mon 8/17

8:55 pm-7:25 pm

1 stop14h 30m

Belfast City

Wed 9/2

10:05 am-6:20 pm

1 stop16h 15m

$914

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Tue 8/25

8:30 am-10:45 am

2 stops18h 15m

Belfast City

Tue 9/8

9:40 am-6:20 pm

1 stop16h 40m

$918

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 8/3

4:04 pm-7:25 pm

2 stops19h 21m

Belfast City

Sun 8/23

7:10 pm-1:50 pm

1 stop26h 40m

$926

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 8/17

9:55 am-4:55 pm

2 stops23h 00m

Belfast City

Fri 9/4

9:50 am-11:44 pm

2 stops21h 54m

$948

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Sun 9/13

6:45 am-6:50 pm

3 stops28h 05m

Belfast Intl

Thu 9/17

10:15 am-8:20 am

2 stops30h 05m

$951

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Thu 8/20

4:43 pm-7:25 pm

2 stops18h 42m

Belfast City

Mon 9/7

7:35 pm-1:50 pm

1 stop26h 15m

$954

Santa AnaBelfast

SNA - BHD

SNABHD

Santa Ana J. Wayne/Orange Cnty

Tue 8/25

11:21 am-3:20 pm

2 stops19h 59m

Belfast City

Tue 9/8

9:40 am-8:15 pm

2 stops18h 35m

$959

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Tue 8/18

11:00 am-4:55 pm

2 stops21h 55m

Belfast City

Sun 8/30

5:30 pm-2:45 pm

1 stop29h 15m

$988

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 8/17

4:30 pm-10:25 pm

2 stops21h 55m

Belfast Intl

Mon 9/7

6:10 am-2:30 pm

2 stops40h 20m

$992

San JoseBelfast

SJC - BHD

SJCBHD

San Jose

Mon 8/17

12:03 pm-3:30 pm

2 stops19h 27m

Belfast City

Mon 9/7

9:40 am-10:32 pm

2 stops20h 52m

$992

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $566). Flying from California to Northern Ireland in June is currently the most expensive (average of $1,213). 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 April 30, 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
7,937 reviews

Overall

6.7

Food

6.4

Entertainment

6.4

Boarding

6.9

Crew

7.7

Comfort

6.8

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance
British Airways
6.7
Okay
7,937 reviews
British Airways
6.7
Okay
7,937 reviews

Overall

6.7

Food

6.4

Entertainment

6.4

Boarding

6.9

Crew

7.7

Comfort

6.8

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance

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 18h 59m. British Airways provides one of the quickest options available for as low as $891. The distance between California and Northern Ireland is about 5038 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 $566). Flying from California to Northern Ireland in June is currently the most expensive (average of $1,213). 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.

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 April 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$583Average$975FlexibilityNo cancel feeOn-time70%

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