HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Northern Ireland

$391+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
sep. 2 — sep. 91
mar. 9/2
mar. 9/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from California to Northern Ireland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 agosto 28, 2025.

Round-trip from

$553
(Connections by easyJet)

One-way from

$391
(Expedia)

Popular in

June

Cheapest in

September

Average price

$774
From California to Northern Ireland
Search Deals
One-way flight from California to Northern Ireland
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($249 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

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 agosto 28, 2025.

This Connections by easyJet deal was found by Cheapflights users on 8/27. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/273:05 pmLAX - BHD
1 stop33h 05mMultiple Airlines
jue. 10/28:15 pmBHD - LAX
1 stop25h 55mMultiple Airlines
Deal found 8/27$553
This Connections by easyJet deal was found by Cheapflights users on 8/26. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/104:30 pmLAX - BFS
1 stop32h 55mMultiple Airlines
vie. 10/176:05 amBFS - LAX
1 stop16h 05mMultiple Airlines
Deal found 8/26$559
This Connections by easyJet deal was found by Cheapflights users on 8/27. 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 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 stop31h 20mMultiple Airlines
mié. 10/156:10 amBFS - LAX
1 stop16h 00mMultiple Airlines
Deal found 8/27$614
This Travelocity deal was found by Cheapflights users on 8/28. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/143:50 pmSFO - BHD
2 stops17h 40mBritish Airways
mié. 10/296:35 amBHD - SFO
1 stop16h 25mBritish Airways
Deal found 8/28$635
This American Airlines deal was found by Cheapflights users on 8/28. 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.
mar. 10/1411:15 amSFO - BHD
2 stops17h 45mAmerican Airlines
mié. 10/299:15 amBHD - SFO
2 stops19h 28mAmerican Airlines
Deal found 8/28$644
This Mytrip deal was found by Cheapflights users on 8/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/176:00 amLAX - BFS
3 stops28h 35mMultiple Airlines
mié. 10/227:15 amBFS - LAX
3 stops40h 15mMultiple Airlines
Deal found 8/27$652
This Connections by easyJet deal was found by Cheapflights users on 8/27. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/264:30 pmLAX - BHD
1 stop19h 55mMultiple Airlines
vie. 10/37:00 amBHD - LAX
1 stop15h 10mMultiple Airlines
Deal found 8/27$656
This Cheapflightsfares deal was found by Cheapflights users on 8/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/155:05 pmLAX - BHD
1 stop14h 30mBritish Airways
jue. 10/236:35 amBHD - LAX
1 stop19h 00mBritish Airways
Deal found 8/26$658
This British Airways deal was found by Cheapflights users on 8/27. 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.
mié. 12/35:30 pmSFO - BHD
1 stop15h 05mBritish Airways
dom. 12/710:40 amBHD - SFO
1 stop16h 00mBritish Airways
Deal found 8/27$661
This American Airlines deal was found by Cheapflights users on 8/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/1511:30 amLAX - BHD
2 stops16h 25mAmerican Airlines
jue. 10/231:15 pmBHD - LAX
1 stop15h 00mAmerican Airlines
Deal found 8/27$663
This Trip.com deal was found by Cheapflights users on 8/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/273:05 pmLAX - BFS
1 stop22h 25mMultiple Airlines
jue. 10/29:00 pmBFS - LAX
1 stop25h 10mMultiple Airlines
Deal found 8/27$676
This Trip.com deal was found by Cheapflights users on 8/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/264:30 pmLAX - BFS
1 stop21h 50mMultiple Airlines
vie. 10/36:05 amBFS - LAX
1 stop16h 05mMultiple Airlines
Deal found 8/27$693

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 agosto 28, 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

sáb. 9/27

3:05 pm-8:10 am

1 stop33h 05m

Belfast City

jue. 10/2

8:15 pm-2:10 pm

1 stop25h 55m

$553

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

vie. 10/10

4:30 pm-9:25 am

1 stop32h 55m

Belfast Intl

vie. 10/17

6:05 am-2:10 pm

1 stop16h 05m

$559

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

mié. 9/17

4:30 pm-7:50 am

1 stop31h 20m

Belfast Intl

mié. 10/15

6:10 am-2:10 pm

1 stop16h 00m

$614

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

mié. 9/17

4:30 pm-7:50 am

1 stop31h 20m

Belfast Intl

mié. 10/22

6:10 am-2:10 pm

1 stop16h 00m

$614

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

mar. 10/14

3:50 pm-5:30 pm

2 stops17h 40m

Belfast City

mié. 10/29

6:35 am-4:00 pm

1 stop16h 25m

$635

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

mar. 10/14

11:15 am-1:00 pm

2 stops17h 45m

Belfast City

mié. 10/29

9:15 am-9:43 pm

2 stops19h 28m

$644

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

vie. 9/26

4:30 pm-8:25 pm

1 stop19h 55m

Belfast City

vie. 10/3

7:00 am-2:10 pm

1 stop15h 10m

$656

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

mié. 10/15

1:25 pm-1:30 pm

1 stop16h 05m

Belfast City

jue. 10/23

6:35 am-8:15 pm

1 stop21h 40m

$658

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

mié. 10/15

5:05 pm-3:35 pm

1 stop14h 30m

Belfast City

jue. 10/23

6:35 am-5:35 pm

1 stop19h 00m

$658

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

mié. 12/3

5:30 pm-4:35 pm

1 stop15h 05m

Belfast City

dom. 12/7

10:40 am-6:40 pm

1 stop16h 00m

$661

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/28

Showing 1-10 of 35 results
1
2
3
4

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 agosto 28, 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.

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 agosto 28, 2025.
Peruse reviews from past customers who have flown with American Airlines and 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.
American Airlines
7.2
Good
10,000 reviews

Comfort

7.2

Boarding

7.5

Crew

8.0

Food

6.5

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Andrew,May 2025

LAX - MIA

2 hour delay. Discovered an engine problem late, we boarded the plane and they asked us to come off. To add insult to injury nothing was given to passengers to make amends. No free drink. No extra food or snacks. No free WiFi. Gimme a break
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Comfort

7.2

Boarding

7.5

Crew

8.0

Food

6.5

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Andrew,May 2025

LAX - MIA

2 hour delay. Discovered an engine problem late, we boarded the plane and they asked us to come off. To add insult to injury nothing was given to passengers to make amends. No free drink. No extra food or snacks. No free WiFi. Gimme a break
British Airways
6.7
Okay
7,316 reviews
American Airlines
7.2
Good
10,000 reviews

Comfort

7.2

Boarding

7.5

Crew

8.0

Food

6.5

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Andrew,May 2025

LAX - MIA

2 hour delay. Discovered an engine problem late, we boarded the plane and they asked us to come off. To add insult to injury nothing was given to passengers to make amends. No free drink. No extra food or snacks. No free WiFi. Gimme a break

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 40m. British Airways provides one of the quickest options available for as low as $635. The distance between California and Northern Ireland is about 5038 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 $391 on British Airways. Other airlines that offer cheap prices include Air France from $463 and Delta from $468 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for California to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
Newark to Gatwick flights
John F Kennedy Intl to London City flights
LaGuardia to Heathrow flights
Newark to London City flights
Boston to Heathrow flights
John F Kennedy Intl to Luton flights
John F Kennedy Intl to Stansted flights
Dulles Intl to Heathrow flights
LaGuardia to Gatwick flights
Los Angeles to Heathrow flights
Newark to Stansted flights
O'Hare Intl to Heathrow flights
Dallas/Fort Worth to Heathrow flights
Seattle to Heathrow flights
San Francisco to Heathrow flights
Baltimore to Heathrow flights
Newark to Luton flights
Denver to Heathrow flights
Atlanta to Heathrow flights
Boston to Gatwick flights
Miami to Heathrow flights
Dulles Intl to Gatwick flights
Boston to London City flights
Reagan-National to Heathrow flights
Philadelphia to Heathrow flights
Hobby to Heathrow flights
Dulles Intl to London City flights
Orlando to Heathrow flights
Los Angeles to London City flights
George Bush Intcntl to Heathrow flights
Baltimore to Gatwick flights
Dallas/Fort Worth to Gatwick flights
O'Hare Intl to Gatwick flights
Seattle to Gatwick flights
LaGuardia to London City flights
O'Hare Intl to London City flights
Reagan-National to Gatwick flights
Los Angeles to Gatwick flights
San Diego to Heathrow flights
Newark to Edinburgh flights
Minneapolis to Heathrow flights
San Francisco to Gatwick flights
John F Kennedy Intl to Edinburgh flights
Raleigh to Heathrow flights
Boston to Stansted flights
Austin to Heathrow flights
San Francisco to London City flights

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 agosto 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$588Average$798FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$635Average$906FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.