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Northern Ireland

$259+ 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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
Dec 21 — Dec 281
Sun 12/21
Sun 12/28
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 November 21, 2025.

Round-trip from

$600
(Cheapflightsfares)

One-way from

$259
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$895
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. 18% potential increase in price ($199 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 November 21, 2025.

This Air France deal was found by Cheapflights users on 11/20. 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.
Mon 12/11:55 pmSFO - BHD
1 stop18h 55mMultiple Airlines
Sun 12/75:20 pmBHD - SFO
1 stop26h 30mMultiple Airlines
Deal found 11/20$682
This Air France deal was found by Cheapflights users on 11/20. 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.
Sat 12/61:55 pmSFO - BHD
1 stop18h 55mMultiple Airlines
Fri 12/125:20 pmBHD - SFO
1 stop26h 30mMultiple Airlines
Deal found 11/20$763
This Delta deal was found by Cheapflights users on 11/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/411:46 amSNA - BHD
2 stops21h 04mDelta
Mon 12/85:20 pmBHD - SNA
2 stops37h 10mDelta
Deal found 11/18$823
This American Airlines deal was found by Cheapflights users on 11/20. 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 12/11:11 pmSFO - BHD
2 stops17h 04mAmerican Airlines
Sun 12/76:30 amBHD - SFO
2 stops20h 00mAmerican Airlines
Deal found 11/20$838
This Virgin Atlantic deal was found by Cheapflights users on 11/20. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:45 pmLAX - BHD
1 stop23h 15mVirgin Atlantic
Thu 1/85:20 pmBHD - LAX
1 stop26h 25mVirgin Atlantic
Deal found 11/20$868
This Mytrip deal was found by Cheapflights users on 11/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:15 pmLAX - BFS
2 stops25h 50mMultiple Airlines
Thu 1/86:30 amBFS - LAX
3 stops38h 03mMultiple Airlines
Deal found 11/20$880
This FlightHub deal was found by Cheapflights users on 11/20. 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.
Thu 12/48:15 pmLAX - BHD
2 stops29h 35mAer Lingus
Thu 1/88:20 amBHD - LAX
2 stops18h 10mAer Lingus
Deal found 11/20$920
This Cheapflightsfares deal was found by Cheapflights users on 11/19. 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 11/245:45 pmLAX - BHD
1 stop14h 20mBritish Airways
Sat 12/69:15 amBHD - LAX
1 stop19h 10mBritish Airways
Deal found 11/19$948
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Sun 11/237:30 pmLAX - BHD
1 stop15h 10mAmerican Airlines
Sun 12/76:30 amBHD - LAX
1 stop15h 00mAmerican Airlines
Deal found 11/20$967
This Ovago deal was found by Cheapflights users on 11/19. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/235:45 pmLAX - BHD
1 stop29h 55mBritish Airways
Sun 12/79:10 amBHD - LAX
1 stop14h 40mBritish Airways
Deal found 11/19$973
This Mytrip deal was found by Cheapflights users on 11/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:20 pmSFO - BFS
2 stops18h 55mMultiple Airlines
Sun 12/77:10 amBFS - SFO
2 stops17h 25mMultiple Airlines
Deal found 11/20$994
This oojo deal was found by Cheapflights users on 11/20. 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.
Wed 12/312:15 amLAX - BHD
2 stops23h 15mBritish Airways
Thu 1/86:00 pmBHD - LAX
2 stops37h 11mBritish Airways
Deal found 11/20$1,028

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 November 21, 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

Las VegasBelfast

LAS - BHD

LASBHD

Las Vegas Harry Reid Intl

Fri 1/9

8:55 pm-7:15 pm

1 stop14h 20m

Belfast City

Fri 2/6

11:30 am-6:50 pm

1 stop15h 20m

$600

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Fri 1/23

3:30 pm-2:15 pm

1 stop14h 45m

Belfast City

Tue 2/3

6:35 am-6:30 pm

1 stop19h 55m

$600

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 1/28

9:00 pm-7:10 pm

1 stop14h 10m

Belfast City

Sun 2/1

6:30 am-6:30 pm

1 stop20h 00m

$621

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 3/3

5:30 pm-6:40 pm

1 stop17h 10m

Belfast City

Tue 3/10

6:35 am-4:00 pm

1 stop16h 25m

$641

Las VegasBelfast

LAS - BHD

LASBHD

Las Vegas Harry Reid Intl

Thu 1/15

9:46 am-4:50 pm

2 stops23h 04m

Belfast City

Mon 1/19

5:20 pm-2:15 pm

1 stop28h 55m

$647

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 1/28

1:45 pm-4:50 pm

1 stop19h 05m

Belfast City

Sun 2/1

5:20 pm-4:20 pm

2 stops31h 00m

$653

Las VegasBelfast

LAS - BHD

LASBHD

Las Vegas Harry Reid Intl

Thu 1/15

11:56 am-4:50 pm

2 stops20h 54m

Belfast City

Mon 1/19

5:20 pm-6:56 pm

2 stops33h 36m

$657

Santa AnaBelfast

SNA - BHD

SNABHD

Santa Ana J. Wayne/Orange Cnty

Wed 1/28

9:51 am-4:50 pm

2 stops22h 59m

Belfast City

Sun 2/1

5:20 pm-10:18 pm

2 stops36h 58m

$657

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 1/28

11:55 am-4:50 pm

2 stops20h 55m

Belfast City

Sun 2/1

5:20 pm-6:51 pm

2 stops33h 31m

$658

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 2/11

8:40 pm-7:10 pm

1 stop14h 30m

Belfast City

Sun 2/15

3:10 pm-3:00 pm

1 stop31h 50m

$671

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 45 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 $586). Flying from California to Northern Ireland in June is currently the most expensive (average of $914). 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 November 21, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 17% on flights from California to Northern Ireland by exploring options for tickets in the morning.

How much does it cost to fly round-trip from California to Northern Ireland?

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 November 21, 2025.
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
7,533 reviews

Comfort

6.7

Entertainment

6.4

Boarding

6.9

Overall

6.7

Crew

7.6

Food

6.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.
British Airways
6.7
Okay
7,533 reviews
British Airways
6.7
Okay
7,533 reviews

Comfort

6.7

Entertainment

6.4

Boarding

6.9

Overall

6.7

Crew

7.6

Food

6.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.

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 20m. British Airways provides one of the quickest options available for as low as $600. The distance between California and Northern Ireland is about 4902 mi. This flight may include one or multiple stops.

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

    One-way options have recently been found by users for as low as $407 on American Airlines. Other airlines that offer cheap prices include British Airways from $418 and Aer Lingus from $504 one-way.

  • 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 $586). Flying from California to Northern Ireland in June is currently the most expensive (average of $914). 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 November 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$599Average$894FlexibilityNo cancel feeOn-time70%

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