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

£529 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on British Airways and KLM, with prices starting from £750 and £1,256, respectively.

What is the cheapest month to fly from Northern Ireland to California?

Flights from Northern Ireland to California lean towards being more expensive in August. Prices are generally better when you fly from Northern Ireland to California in January, with the cheapest ticket starting at £433.

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.

£289+ Flights from Northern Ireland to California

Cheap flight deals from Northern Ireland to California

Round-trip from	£530
One-way from	£289
Popular in	August
Cheapest in	January
Average price	£551

15/5-29/5
4 total stops
68h 40m total
Northern Ireland to California

Search Deals

24/6
3 total stops
43h 58m total
Northern Ireland to California

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£67 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (£31 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Find flight deals from Northern Ireland to California

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 April 2025.

Fri 25/406:35BHD - SFO

1 stop15h 15mBritish Airways

Tue 29/414:45SFO - BHD

2 stops16h 35mBritish Airways

Deal found 18/4£516

Fri 25/406:30BHD - SFO

1 stop13h 15mDelta

Tue 29/406:05SFO - BHD

2 stops26h 50mDelta

Deal found 18/4£526

Thu 15/507:10BFS - LAX

2 stops43h 55mMultiple Airlines

Thu 29/507:30LAX - BFS

2 stops24h 45mMultiple Airlines

Deal found 17/4£530

Fri 25/406:30BHD - SFO

2 stops20h 13mKLM

Tue 29/413:45SFO - BHD

2 stops19h 10mKLM

Deal found 18/4£531

Sat 26/409:35BHD - LAS

2 stops19h 23mBritish Airways

Tue 29/410:18LAS - BHD

2 stops16h 17mBritish Airways

Deal found 17/4£641

Sun 1/609:55BFS - LAS

2 stops45h 26mMultiple Airlines

Sun 8/609:43LAS - BFS

3 stops22h 12mMultiple Airlines

Deal found 16/4£739

Sat 17/516:50BFS - SFO

2 stops36h 00mMultiple Airlines

Sat 24/507:30SFO - BFS

3 stops25h 40mMultiple Airlines

Deal found 17/4£823

Sat 26/407:00BHD - LAS

3 stops34h 15mMultiple Airlines

Tue 29/407:40LAS - BHD

3 stops26h 35mMultiple Airlines

Deal found 17/4£878

Fri 25/418:00BHD - SFO

2 stops29h 55mAer Lingus

Tue 29/417:45SFO - BHD

2 stops36h 00mAer Lingus

Deal found 18/4£883

Fri 25/418:40BHD - SFO

2 stops29h 15mMultiple Airlines

Tue 29/408:20SFO - BHD

3 stops27h 35mMultiple Airlines

Deal found 18/4£1,048

Thu 23/1006:30BHD - LAX

2 stops35h 56mVirgin Atlantic

Tue 28/1017:35LAX - BHD

2 stops44h 25mVirgin Atlantic

Deal found 17/4£2,565

Thu 23/1006:35BHD - LAX

1 stop16h 20mMultiple Airlines

Tue 28/1021:55LAX - BHD

1 stop13h 45mMultiple Airlines

Deal found 17/4£2,752

Best flights from Northern Ireland to California
Discover carefully curated flight deals from Northern Ireland to California that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 April 2025.

Thu 15/507:10BFS - LAX

2 stops43h 55mMultiple Airlines

Thu 29/507:30LAX - BFS

2 stops24h 45mMultiple Airlines

Deal found 17/4£530

Wed 20/806:50BHD - SFO

1 stop15h 00mBritish Airways

Fri 5/916:35SFO - BHD

1 stop14h 55mBritish Airways

Deal found 17/4£592

Wed 20/806:30BHD - SFO

1 stop13h 15mDelta

Fri 5/911:05SFO - BHD

2 stops21h 50mDelta

Deal found 17/4£596

Sun 1/609:55BFS - LAS

2 stops45h 26mMultiple Airlines

Sun 8/609:43LAS - BFS

3 stops22h 12mMultiple Airlines

Deal found 16/4£739

Sat 17/516:50BFS - SFO

2 stops36h 00mMultiple Airlines

Sat 24/507:30SFO - BFS

3 stops25h 40mMultiple Airlines

Deal found 17/4£823

Mon 1/917:25BHD - LAX

1 stop26h 25mKLM

Mon 8/915:40LAX - BHD

2 stops17h 15mKLM

Deal found 17/4£3,268

Wed 3/906:50BHD - LAX

1 stop16h 05mAmerican Airlines

Wed 10/920:05LAX - BHD

1 stop14h 35mAmerican Airlines

Deal found 17/4£3,469

Mon 1/919:30BHD - LAX

1 stop27h 25mFinnair

Wed 10/920:05LAX - BHD

1 stop14h 35mFinnair

Deal found 17/4£3,685

Thu 4/906:35BHD - LAX

1 stop14h 50mIberia

Tue 9/920:05LAX - BHD

1 stop13h 25mIberia

Deal found 17/4£3,697

Tue 2/906:35BHD - LAX

1 stop14h 50mBritish Airways

Tue 9/920:05LAX - BHD

1 stop13h 25mBritish Airways

Deal found 17/4£3,199

Wed 3/906:30BHD - LAX

2 stops18h 59mDelta

Wed 10/910:25LAX - BHD

2 stops22h 30mDelta

Deal found 17/4£3,532

Tue 2/906:30BHD - LAX

1 stop13h 20mMultiple Airlines

Tue 9/913:40LAX - BHD

2 stops19h 15mMultiple Airlines

Deal found 17/4£3,216

Last-minute flights from Northern Ireland to California
Discover last-minute flight deals from Northern Ireland to California. Data last updated 18 April 2025 and is based on user searches.

Fri 25/406:35BHD - SFO

1 stop15h 15mBritish Airways

Tue 29/414:45SFO - BHD

2 stops16h 35mBritish Airways

Deal found 18/4£516

Fri 25/406:30BHD - SFO

1 stop13h 15mDelta

Tue 29/406:05SFO - BHD

2 stops26h 50mDelta

Deal found 18/4£526

Fri 25/406:30BHD - SFO

2 stops20h 13mKLM

Tue 29/413:45SFO - BHD

2 stops19h 10mKLM

Deal found 18/4£531

Fri 25/418:00BHD - SFO

2 stops29h 55mAer Lingus

Tue 29/417:45SFO - BHD

2 stops36h 00mAer Lingus

Deal found 18/4£883

Fri 25/418:40BHD - SFO

2 stops29h 15mMultiple Airlines

Tue 29/408:20SFO - BHD

3 stops27h 35mMultiple Airlines

Deal found 18/4£1,048

Sat 26/409:35BHD - LAS

2 stops19h 23mBritish Airways

Tue 29/410:18LAS - BHD

2 stops16h 17mBritish Airways

Deal found 17/4£641

Sat 26/407:00BHD - LAS

3 stops34h 15mMultiple Airlines

Tue 29/407:40LAS - BHD

3 stops26h 35mMultiple Airlines

Deal found 17/4£878

Sat 26/409:40BFS - LAS

3 stops31h 35mMultiple Airlines

Tue 29/417:35LAS - BFS

3 stops19h 55mMultiple Airlines

Deal found 17/4£947

Thu 15/507:10BFS - LAX

2 stops43h 55mMultiple Airlines

Thu 29/507:30LAX - BFS

2 stops24h 45mMultiple Airlines

Deal found 17/4£530

Sat 17/516:50BFS - SFO

2 stops36h 00mMultiple Airlines

Sat 24/507:30SFO - BFS

3 stops25h 40mMultiple Airlines

Deal found 17/4£823

One-way flights from Northern Ireland to California
Search for one-way flight options from Northern Ireland to California. Find affordable one-way fares based on user searches. Data last updated 18 April 2025.

Tue 24/622:55BFS - LAX

3 stops43h 58mMultiple Airlines

Deal found 17/4£289

Tue 5/805:55BFS - SFO

3 stops40h 04mMultiple Airlines

Deal found 17/4£341

Tue 24/614:20BHD - LAX

1 stop31h 50mMultiple Airlines

Deal found 17/4£463

Tue 24/606:50BHD - LAX

2 stops19h 35mAer Lingus

Deal found 17/4£529

Tue 5/807:05BHD - SFO

2 stops37h 18mMultiple Airlines

Deal found 17/4£725

Sun 14/913:00BHD - ONT

2 stops18h 36mBritish Airways

Deal found 16/4£750

Mon 21/718:45BHD - SFO

2 stops29h 10mAer Lingus

Deal found 17/4£788

Mon 21/706:40BHD - SFO

1 stop15h 10mBritish Airways

Deal found 17/4£891

Sat 21/606:30BHD - ONT

2 stops17h 47mKLM

Deal found 16/4£1,256

Cheapflights Fare Finder

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

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Wed 20/8

06:50-13:50

1 stop15h 00m

San Francisco

Fri 5/9

16:35-15:30

1 stop14h 55m

£592

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Wed 20/8

06:30-11:45

1 stop13h 15m

San Francisco

Fri 5/9

11:05-16:55

2 stops21h 50m

£596

BelfastLos Angeles

BFS - LAX

BFSLAX

Belfast Intl

Sun 1/6

09:55-14:00

1 stop36h 05m

Los Angeles

Sun 8/6

16:30-20:20

1 stop19h 50m

£646

BelfastLas Vegas

BFS - LAS

BFSLAS

Belfast Intl

Sun 1/6

09:55-23:21

2 stops45h 26m

Las Vegas Harry Reid Intl

Sun 8/6

09:43-15:55

3 stops22h 12m

£739

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sat 17/5

16:50-20:50

2 stops36h 00m

San Francisco

Sat 24/5

07:30-17:10

3 stops25h 40m

£823

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Tue 2/9

06:35-13:25

1 stop14h 50m

Los Angeles

Tue 9/9

20:05-17:30

1 stop13h 25m

£3,199

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Tue 2/9

06:30-11:50

1 stop13h 20m

Los Angeles

Tue 9/9

13:40-16:55

2 stops19h 15m

£3,216

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Mon 1/9

17:25-11:50

1 stop26h 25m

Los Angeles

Mon 8/9

15:40-16:55

2 stops17h 15m

£3,268

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Wed 3/9

06:50-14:55

1 stop16h 05m

Los Angeles

Wed 10/9

20:05-18:40

1 stop14h 35m

£3,469

BelfastLos Angeles

BHD - LAX

BHDLAX

Belfast City

Wed 3/9

06:30-17:29

2 stops18h 59m

Los Angeles

Wed 10/9

10:25-16:55

2 stops22h 30m

£3,532

Flights are sorted by cheapest return flights first.

Deals found on 17/4

Showing 1-10 of 21 results

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, January is the cheapest month in which you can book a flight from Northern Ireland to California (average of £575). Flying from Northern Ireland to California in July is currently the most expensive (average of £811). 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 NIR to CA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Northern Ireland to California as you normally would.

Rainfall in California by month

In terms of precipitation, rainfall in California ranges from 0.0 - 87.0 inches per month. February is typically the wettest month, when rainfall can reach 87.0 mm. July is typically the driest time to visit California when rainfall is around 0.0 mm.

Temperature in California by month

If weather is an important factor for your trip to California, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 C).

Reviews of airlines servicing California

Get a feel of what it's like to fly with Delta, KLM and Finnair from Northern Ireland to California by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

7,917 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,329 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Aer Lingus

7.0

Good

1,063 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines to fly from Northern Ireland to California one-way?
£529 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on British Airways and KLM, with prices starting from £750 and £1,256, respectively.
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, January is the cheapest month in which you can book a flight from Northern Ireland to California (average of £575). Flying from Northern Ireland to California in July is currently the most expensive (average of £811). 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

Alternative routes for Northern Ireland to California

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Complete your trip

California car hire

Los Angeles Airport car hire

San Francisco Airport car hire

San Diego Airport car hire

San Jose Airport car hire

Sacramento Intl Airport car hire

Ontario Airport car hire

Oakland Airport car hire

Burbank Bob Hope Airport car hire

Palm Springs Airport car hire

Fresno Airterminal Airport car hire

Long Beach Municipal Airport car hire

Direct flights to United States

Northern Ireland to California flights

Belfast Intl to Los Angeles flights

Belfast Intl to San Francisco flights

Belfast City to San Francisco flights

Belfast Intl to Las Vegas flights

Belfast City to Ontario flights

Belfast City to Las Vegas flights

Belfast City to Los Angeles flights

Belfast Intl to Santa Ana flights

Belfast City to Santa Ana flights

Top airline flying from Northern Ireland to California

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£412	Average£632	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

Fly with Cheapflights

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.

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Cheap flights from Northern Ireland to California from £289

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 24/6. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Northern Ireland to California

Cheapest flights from Northern Ireland to CaliforniaExplore 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 April 2025.

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 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Northern Ireland to California that are best for you.

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.

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?

What is the cheapest time of day to fly from NIR to CA?

Find hourly flight availability from Northern Ireland to California. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 April 2025.

Rainfall in California by month

Plan your trip to California by taking into account the average rainfall totals by month.

Temperature in California by month

Plan your trip to California by taking into account the average temperature totals by month.

Reviews of airlines servicing California

Get a feel of what it's like to fly with Delta, KLM and Finnair from Northern Ireland to California by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

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

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

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

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

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

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.

Top airline flying from Northern Ireland to California

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?

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

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

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

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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 April 2025.