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Northern Ireland

$206+ 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 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
mar 13 — mar 201
sex 3/13
sex 3/20
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 fevereiro 11, 2026.

This American Airlines deal was found by Cheapflights users on 2/9. 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.
qua 3/116:40 pm
LAX
-
BHD
1 stop17h 30m
American Airlines
qua 3/1812:25 pm
BHD
-
LAX
1 stop16h 00m
American Airlines
Deal found 2/9$629
This oojo deal was found by Cheapflights users on 2/9. 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.
qua 3/1110:00 pm
LAX
-
BHD
1 stop26h 30m
British Airways
qua 3/183:40 pm
BHD
-
LAX
2 stops24h 43m
British Airways
Deal found 2/9$632
This oojo deal was found by Cheapflights users on 2/8. 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.
sáb 8/89:45 pm
SFO
-
BHD
2 stops26h 55m
British Airways
seg 9/73:20 pm
BHD
-
SFO
1 stop30h 30m
British Airways
Deal found 2/8$651
This British Airways deal was found by Cheapflights users on 2/8. 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.
dom 8/94:35 pm
SFO
-
BHD
1 stop17h 05m
British Airways
qui 9/38:35 pm
BHD
-
SFO
1 stop25h 15m
British Airways
Deal found 2/8$656
This American Airlines deal was found by Cheapflights users on 2/9. 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.
ter 4/74:50 pm
LAS
-
BHD
2 stops16h 45m
American Airlines
ter 4/149:40 am
BHD
-
LAS
2 stops19h 50m
American Airlines
Deal found 2/9$658
This Delta deal was found by Cheapflights users on 2/9. 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.
qua 3/1110:40 am
LAX
-
BHD
2 stops23h 10m
Delta
qua 3/186:30 am
BHD
-
LAX
2 stops24h 25m
Delta
Deal found 2/9$665
This British Airways deal was found by Cheapflights users on 2/8. 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.
qua 8/54:35 pm
SFO
-
BHD
1 stop15h 05m
British Airways
qui 9/37:30 pm
BHD
-
SFO
1 stop26h 20m
British Airways
Deal found 2/8$667
This oojo deal was found by Cheapflights users on 2/9. 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.
ter 4/710:10 pm
LAS
-
BHD
1 stop13h 30m
British Airways
ter 4/149:40 am
BHD
-
LAS
2 stops19h 50m
British Airways
Deal found 2/9$681
This oojo deal was found by Cheapflights users on 2/8. 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.
sáb 8/89:45 pm
SFO
-
BHD
2 stops26h 55m
British Airways
dom 9/66:30 am
BHD
-
SFO
1 stop15h 20m
British Airways
Deal found 2/8$685
This Delta deal was found by Cheapflights users on 2/8. 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.
seg 8/101:45 pm
SFO
-
BHD
1 stop35h 35m
Delta
sex 9/49:50 am
BHD
-
SFO
2 stops21h 56m
Delta
Deal found 2/8$690
This British Airways deal was found by Cheapflights users on 2/8. 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.
qua 8/54:35 pm
SFO
-
BHD
1 stop15h 05m
British Airways
dom 9/68:10 pm
BHD
-
SFO
1 stop25h 40m
British Airways
Deal found 2/8$701
This British Airways deal was found by Cheapflights users on 2/8. 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.
qua 2/255:30 pm
SFO
-
BHD
1 stop15h 05m
British Airways
dom 3/18:25 pm
BHD
-
SFO
1 stop26h 35m
British Airways
Deal found 2/8$708

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 fevereiro 11, 2026.

Round-trip from

$629
(American Airlines)

One-way from

$206
(oojo)

Popular in

June

Cheapest in

October

Average price

$685
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 ($218 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 fevereiro 11, 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

qua 3/11

10:00 pm-7:30 am

1 stop26h 30m

Belfast City

qua 3/18

3:40 pm-9:23 am

2 stops24h 43m

$632

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

seg 8/10

4:35 pm-3:30 pm

1 stop14h 55m

Belfast City

qua 9/9

8:35 pm-1:50 pm

1 stop25h 15m

$656

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

dom 8/9

4:35 pm-5:40 pm

1 stop17h 05m

Belfast City

ter 9/8

7:30 pm-1:50 pm

1 stop26h 20m

$656

Las VegasBelfast

LAS - BHD

LASBHD

Las Vegas Harry Reid Intl

ter 4/7

4:50 pm-5:35 pm

2 stops16h 45m

Belfast City

ter 4/14

9:40 am-9:30 pm

2 stops19h 50m

$658

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

sáb 8/8

9:45 pm-8:40 am

2 stops26h 55m

Belfast City

seg 9/7

7:35 pm-6:34 pm

2 stops54h 59m

$659

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

qua 8/5

4:35 pm-3:40 pm

1 stop15h 05m

Belfast City

qua 9/9

7:40 pm-1:50 pm

1 stop26h 10m

$667

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

qua 8/5

4:35 pm-3:40 pm

1 stop15h 05m

Belfast City

seg 9/7

7:35 pm-1:50 pm

1 stop26h 15m

$667

Las VegasBelfast

LAS - BHD

LASBHD

Las Vegas Harry Reid Intl

ter 4/7

10:10 pm-7:40 pm

1 stop13h 30m

Belfast City

ter 4/14

9:40 am-9:30 pm

2 stops19h 50m

$681

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

qui 8/6

4:35 pm-3:30 pm

1 stop14h 55m

Belfast City

qui 9/3

7:30 pm-1:50 pm

1 stop26h 20m

$690

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

sáb 8/8

4:35 pm-6:15 pm

1 stop17h 40m

Belfast City

sex 9/4

11:00 am-5:40 pm

1 stop14h 40m

$690

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

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 $583). 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 fevereiro 11, 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
7,728 reviews

Crew

7.6

Entertainment

6.4

Overall

6.7

Boarding

6.9

Comfort

6.8

Food

6.4

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
7,728 reviews
British Airways
6.7
Okay
7,728 reviews

Crew

7.6

Entertainment

6.4

Overall

6.7

Boarding

6.9

Comfort

6.8

Food

6.4

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 17h 30m. American Airlines provides one of the quickest options available for as low as $629. 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 $583). 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 fevereiro 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$586Average$918FlexibilityNo cancel feeOn-time70%

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