Find flights
When to book
Airlines
FAQs

Cheap flights from Northern Ireland to California from £381

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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LAX
17 Jun — 24 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Northern Ireland to California

Enter your travel dates to find the best prices.

Cheapest flights from Northern Ireland to California
Explore the most affordable flight options available from Northern Ireland to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 May 2026.

Tue 28/719:30
BHD
-
SFO
1 stop26h 20m
British Airways
Wed 19/819:30
SFO
-
BHD
1 stop15h 15m
British Airways
Deal found 16/5£654
Tue 28/706:30
BHD
-
SFO
2 stops26h 29m
Multiple Airlines
Wed 19/809:46
SFO
-
BHD
2 stops21h 54m
Multiple Airlines
Deal found 16/5£657
Tue 14/716:25
BHD
-
LAX
1 stop27h 15m
American Airlines
Tue 21/718:10
LAX
-
BHD
1 stop16h 45m
American Airlines
Deal found 14/5£669
Wed 2/906:30
BHD
-
SFO
1 stop15h 20m
American Airlines
Tue 15/916:35
SFO
-
BHD
1 stop17h 00m
American Airlines
Deal found 18/5£672
Wed 2/906:30
BHD
-
SFO
1 stop15h 20m
American Airlines
Thu 24/919:30
SFO
-
BHD
1 stop15h 55m
American Airlines
Deal found 16/5£673
Tue 1/920:25
BHD
-
SFO
1 stop25h 25m
British Airways
Fri 25/916:21
SFO
-
BHD
2 stops17h 49m
British Airways
Deal found 16/5£675
Sun 26/715:50
BHD
-
SFO
1 stop30h 00m
British Airways
Wed 19/815:46
SFO
-
BHD
2 stops18h 59m
British Airways
Deal found 16/5£676
Mon 27/706:30
BHD
-
SFO
2 stops26h 29m
American Airlines
Wed 19/814:41
SFO
-
BHD
2 stops20h 04m
American Airlines
Deal found 16/5£677
Mon 31/809:50
BHD
-
SFO
1 stop33h 55m
KLM
Thu 24/913:00
SFO
-
BHD
2 stops19h 55m
KLM
Deal found 16/5£678
Tue 14/716:25
BHD
-
LAX
2 stops24h 36m
British Airways
Tue 21/716:15
LAX
-
BHD
1 stop15h 05m
British Airways
Deal found 14/5£679
Wed 9/911:35
BHD
-
LAX
1 stop14h 45m
British Airways
Sat 12/920:55
LAX
-
BHD
1 stop15h 35m
British Airways
Deal found 13/5£681
Tue 1/913:45
BHD
-
SFO
1 stop32h 05m
American Airlines
Wed 16/916:35
SFO
-
BHD
1 stop15h 05m
American Airlines
Deal found 18/5£681

Find flight deals from Northern Ireland to California

Keep the following information in mind while searching for Northern Ireland to California flight deals. Data was last updated 18 May 2026.

Round-trip from

£654

One-way from

£381
British Airways
  • British Airways
  • 28/7-19/8
  • 2 total stops
  • 41h 35m total
  • Northern Ireland to California
Search Deals
2/6
  • 2/6
  • 3 total stops
  • 45h 39m total
  • Northern Ireland to California
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Northern Ireland to California 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 858,174 searches. Data last updated 18 May 2026.
Use the filters below to find and compare flights from Northern Ireland to California that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Wed 29/7

06:30-13:50

1 stop15h 20m

San Francisco

Tue 18/8

06:20-10:45

2 stops20h 25m

£676
Fastest return journey

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 27/7

06:30-13:50

1 stop15h 20m

San Francisco

Thu 20/8

16:35-15:30

1 stop14h 55m

£676

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Wed 5/8

10:05-20:13

2 stops18h 08m

San Francisco

Wed 12/8

19:30-19:50

1 stop16h 20m

£687

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Sat 14/11

09:15-23:57

2 stops22h 42m

Ontario

Tue 17/11

06:10-10:30

2 stops20h 20m

£698

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Mon 9/11

06:35-23:57

2 stops25h 22m

Ontario

Thu 12/11

14:59-16:40

2 stops17h 41m

£698

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 3/9

17:30-11:45

1 stop26h 15m

San Francisco

Thu 17/9

10:31-16:55

2 stops22h 24m

£708

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Sat 7/11

06:35-15:00

1 stop16h 25m

San Francisco

Tue 10/11

17:30-18:40

1 stop17h 10m

£708

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 31/8

09:50-11:45

1 stop33h 55m

San Francisco

Sat 26/9

14:25-16:55

2 stops18h 30m

£708

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Thu 12/11

09:05-18:30

1 stop17h 25m

Los Angeles

Mon 16/11

15:30-16:05

1 stop16h 35m

£710

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Tue 1/9

20:25-13:50

1 stop25h 25m

San Francisco

Fri 18/9

16:35-18:10

1 stop17h 35m

£714

Flights are sorted by cheapest return flights first.

Deals found on 14/5

Showing 1-10 of 40 resultsSorted by cheapest first
1
2
3
4

Best time to book a flight from Northern Ireland to California

Have a flexible travel schedule? Discover the best time to fly to California from Northern Ireland with our price prediction graph.
Estimated return 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 Northern Ireland to California

What is the cheapest month to book a flight from Northern Ireland to California?

Currently, March is the cheapest month in which you can book a flight from Northern Ireland to California (average of £390). Flying from Northern Ireland to California in April is currently the most expensive (average of £526). 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 California

Get insights into the airlines that provide service to California. 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 California. Reviews last updated 18 May 2026.
Read through reviews of airlines operating flights from Northern Ireland to California, such as KLM,American Airlines, andBritish Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,517 reviews
Check prices

Crew

8.4

Entertainment

7.2

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,517 reviews
KLM
7.8
Good
1,517 reviews
Check prices

Crew

8.4

Entertainment

7.2

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
American Airlines
7.1
Good
11,648 reviews
KLM
7.8
Good
1,517 reviews
Check prices

Crew

8.4

Entertainment

7.2

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
7,988 reviews
KLM
7.8
Good
1,517 reviews
Check prices

Crew

8.4

Entertainment

7.2

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from Northern Ireland to California. 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 Northern Ireland to California?

    There are many flights that can get you from Northern Ireland to California in 15h 20m. Fly via British Airways or Delta to get the fastest option. Northern Ireland and California are separated by a distance of 5038 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Northern Ireland to California that include hotel bookings?

    Yes. In addition to deals on Northern Ireland to California flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Northern Ireland to California?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Northern Ireland to California.

  • Can I find deals for business class flights from Northern Ireland to California?

    Yes. Cheapflights offers flight deals from Northern Ireland to California 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 Northern Ireland to California?

    Currently, March is the cheapest month in which you can book a flight from Northern Ireland to California (average of £390). Flying from Northern Ireland to California in April is currently the most expensive (average of £526). 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 Northern Ireland to California

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

Top 3 airlines flying from Northern Ireland to California

Discover the top 3 airlines that operate flights from Northern Ireland to California. 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 858,174 searches. Data last updated 18 May 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£390Average£551FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£476Average£527FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£509Average£616FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Northern Ireland to California?

Cheapflights makes it easy to find Northern Ireland to California flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Northern Ireland to California?

Cheapflights simply makes it quick and affordable to book flights from Northern Ireland to California by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Northern Ireland to California with no change fees?

Need flexible booking options for your flight to California from Northern Ireland? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Northern Ireland to California become cheaper?

Yes! Start tracking prices for Northern Ireland to California flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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.