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$190+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
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 julio 3, 2025.

Round-trip from

$539
(Connections by easyJet)

One-way from

$190
(Connections by easyJet)

Popular in

June

Cheapest in

November

Average price

$973
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 ($165 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 3, 2025.

This Connections by easyJet deal was found by Cheapflights users on 7/1. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/194:30 pmLAX - BHD
1 stop19h 55mMultiple Airlines
vie. 10/107:00 amBHD - LAX
1 stop15h 10mMultiple Airlines
Deal found 7/1$539
This Connections by easyJet deal was found by Cheapflights users on 7/2. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/174:30 pmLAX - BFS
1 stop19h 10mMultiple Airlines
dom. 9/288:10 pmBFS - LAX
1 stop24h 55mMultiple Airlines
Deal found 7/2$568
This Cheapflightsfares deal was found by Cheapflights users on 7/3. 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.
mié. 10/157:20 pmSFO - BHD
1 stop15h 20mBritish Airways
mar. 10/216:35 amBHD - SFO
1 stop18h 50mBritish Airways
Deal found 7/3$636
This Cheapflightsfares deal was found by Cheapflights users on 7/3. 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.
mié. 10/153:40 pmLAX - BHD
1 stop15h 55mBritish Airways
jue. 10/236:35 amBHD - LAX
1 stop19h 30mBritish Airways
Deal found 7/3$637
This American Airlines deal was found by Cheapflights users on 7/3. 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.
mié. 10/1510:55 amSFO - BHD
2 stops18h 35mAmerican Airlines
mar. 10/219:35 amBHD - SFO
2 stops20h 32mAmerican Airlines
Deal found 7/3$648
This American Airlines deal was found by Cheapflights users on 7/2. 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.
mié. 10/152:44 pmLAX - BHD
2 stops16h 51mAmerican Airlines
jue. 10/236:35 amBHD - LAX
1 stop19h 30mAmerican Airlines
Deal found 7/2$666
This Virgin Atlantic deal was found by Cheapflights users on 7/1. 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.
mié. 12/31:50 pmSFO - BHD
1 stop19h 00mVirgin Atlantic
dom. 12/75:20 pmBHD - SFO
1 stop26h 30mVirgin Atlantic
Deal found 7/1$740
This Delta deal was found by Cheapflights users on 7/1. 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.
dom. 8/311:55 amLAX - BHD
2 stops21h 00mDelta
mar. 8/196:40 amBHD - LAX
1 stop13h 10mDelta
Deal found 7/1$744
This Delta deal was found by Cheapflights users on 7/2. 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.
mié. 12/310:00 amSFO - BHD
2 stops27h 00mDelta
dom. 12/75:20 pmBHD - SFO
1 stop26h 30mDelta
Deal found 7/2$745
This Delta deal was found by Cheapflights users on 6/30. 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.
mié. 10/295:55 amOAK - BHD
2 stops27h 55mDelta
dom. 11/25:20 pmBHD - OAK
2 stops31h 11mDelta
Deal found 6/30$755
This oojo deal was found by Cheapflights users on 7/1. 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.
mar. 7/224:45 pmONT - BHD
2 stops16h 45mBritish Airways
jue. 7/317:25 pmBHD - ONT
2 stops30h 43mBritish Airways
Deal found 7/1$795
This oojo deal was found by Cheapflights users on 7/1. 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.
vie. 9/194:42 pmSNA - BHD
2 stops17h 33mBritish Airways
vie. 10/106:35 amBHD - SNA
2 stops23h 18mBritish Airways
Deal found 7/1$802

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 julio 3, 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 - BHD

LAXBHD

Los Angeles

vie. 9/19

4:30 pm-8:25 pm

1 stop19h 55m

Belfast City

vie. 10/10

7:00 am-2:10 pm

1 stop15h 10m

$539

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

mié. 9/17

4:30 pm-7:40 pm

1 stop19h 10m

Belfast Intl

dom. 9/28

8:10 pm-1:05 pm

1 stop24h 55m

$568

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

mié. 10/15

7:20 pm-6:40 pm

1 stop15h 20m

Belfast City

mar. 10/21

6:35 am-5:25 pm

1 stop18h 50m

$636

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

mié. 10/15

3:40 pm-3:35 pm

1 stop15h 55m

Belfast City

jue. 10/23

6:35 am-6:05 pm

1 stop19h 30m

$637

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

mié. 10/15

10:55 am-1:30 pm

2 stops18h 35m

Belfast City

mar. 10/21

9:35 am-10:07 pm

2 stops20h 32m

$648

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

mié. 10/15

2:44 pm-3:35 pm

2 stops16h 51m

Belfast City

jue. 10/23

6:35 am-6:05 pm

1 stop19h 30m

$666

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

mié. 12/3

1:50 pm-9:00 pm

1 stop23h 10m

Belfast City

dom. 12/7

5:20 pm-11:50 am

1 stop26h 30m

$740

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

dom. 8/3

11:55 am-4:55 pm

2 stops21h 00m

Belfast City

mar. 8/19

6:40 am-11:50 am

1 stop13h 10m

$744

OaklandBelfast

OAK - BHD

OAKBHD

Oakland

mié. 10/29

5:55 am-4:50 pm

2 stops27h 55m

Belfast City

dom. 11/2

5:20 pm-4:31 pm

2 stops31h 11m

$755

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

mar. 7/22

4:45 pm-5:30 pm

2 stops16h 45m

Belfast City

jue. 7/31

7:25 pm-6:08 pm

2 stops30h 43m

$795

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 35 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, February is the cheapest month in which you can book a flight from California to Northern Ireland (average of $657). Flying from California to Northern Ireland in June is currently the most expensive (average of $1,189). 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 julio 3, 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.

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 julio 3, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and Virgin Atlantic 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.
Delta
8.0
Very good
7,970 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

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
7,970 reviews
Delta
8.0
Very good
7,970 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

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
1,366 reviews
Delta
8.0
Very good
7,970 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

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
654 reviews
Delta
8.0
Very good
7,970 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

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
7,970 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

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.
Iberia
7.0
Good
2,819 reviews
Delta
8.0
Very good
7,970 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

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?

    One-way options have recently been found by users for as low as $395 on British Airways. Other airlines that offer cheap prices include Iberia from $404 and Delta from $453 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, February is the cheapest month in which you can book a flight from California to Northern Ireland (average of $657). Flying from California to Northern Ireland in June is currently the most expensive (average of $1,189). 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 California to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from California to Northern Ireland

Discover the top 2 airlines 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 julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$493Average$900FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$588Average$792FlexibilityNo cancel feeOn-time70%

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