How long is the flight from Northern Ireland to California?

There are many flights that can get you from Northern Ireland to California in 20h 38m. Fly via American Airlines to get the fastest option. Northern Ireland and California are separated by a distance of 5095 mi.

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.

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).

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.

£322+ Flights from Northern Ireland to California

Cheap flight deals from Northern Ireland to California

Round-trip from	£468
One-way from	£322
Popular in	August
Cheapest in	May
Average price	£485

American Airlines
26/2-2/3
4 total stops
41h 38m total
Northern Ireland to California

Search Deals

5/11
3 total stops
57h 20m total
Northern Ireland to California

Search Deals

Highest demand for flights based on searches. 8% potential increase in price (£43 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (£28 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 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 16 September 2025.

Wed 29/1012:50BFS - LAS

3 stops39h 15mMultiple Airlines

Wed 5/1107:00LAS - BFS

3 stops29h 20mMultiple Airlines

Deal found 14/9£548

Fri 31/1008:05BFS - SFO

2 stops35h 45mMultiple Airlines

Fri 7/1115:40SFO - BFS

2 stops22h 20mMultiple Airlines

Deal found 16/9£567

Mon 22/906:30BHD - LAS

1 stop20h 05mVirgin Atlantic

Mon 29/920:25LAS - BHD

1 stop12h 30mVirgin Atlantic

Deal found 14/9£578

Mon 22/906:30BHD - LAS

1 stop20h 05mDelta

Mon 29/913:35LAS - BHD

2 stops19h 20mDelta

Deal found 14/9£586

Wed 5/1106:35BHD - LAS

1 stop17h 35mMultiple Airlines

Sun 9/1121:05LAS - BHD

1 stop15h 10mMultiple Airlines

Deal found 15/9£616

Wed 5/1106:35BHD - LAS

1 stop20h 15mBritish Airways

Sun 9/1123:49LAS - BHD

2 stops32h 16mBritish Airways

Deal found 15/9£623

Fri 31/1015:05BFS - LAX

2 stops30h 05mMultiple Airlines

Fri 7/1113:45LAX - BFS

2 stops24h 15mMultiple Airlines

Deal found 16/9£628

Mon 22/922:45BFS - LAS

2 stops27h 50mMultiple Airlines

Mon 29/920:25LAS - BFS

2 stops16h 30mMultiple Airlines

Deal found 14/9£722

Mon 22/906:55BHD - LAS

3 stops24h 04mMultiple Airlines

Mon 29/919:05LAS - BHD

2 stops17h 50mMultiple Airlines

Deal found 14/9£1,009

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 16 September 2025.

Thu 26/211:05BHD - ONT

2 stops20h 38mAmerican Airlines

Mon 2/311:05ONT - BHD

2 stops21h 00mAmerican Airlines

Deal found 13/9£468

Thu 5/311:05BHD - ONT

2 stops18h 35mBritish Airways

Mon 9/306:00ONT - BHD

2 stops25h 15mBritish Airways

Deal found 13/9£470

Wed 29/1012:50BFS - LAS

3 stops39h 15mMultiple Airlines

Wed 5/1107:00LAS - BFS

3 stops29h 20mMultiple Airlines

Deal found 14/9£548

Thu 5/310:40BHD - ONT

2 stops21h 03mAmerican Airlines

Mon 9/310:57ONT - BHD

2 stops20h 18mAmerican Airlines

Deal found 14/9£468

Mon 9/309:15BHD - SNA

2 stops20h 15mAmerican Airlines

Wed 11/313:43SNA - BHD

2 stops37h 37mAmerican Airlines

Deal found 13/9£468

Fri 31/1008:05BFS - SFO

2 stops35h 45mMultiple Airlines

Fri 7/1115:40SFO - BFS

2 stops22h 20mMultiple Airlines

Deal found 16/9£567

Thu 5/311:05BHD - SFO

1 stop15h 40mAmerican Airlines

Mon 9/310:37SFO - BHD

2 stops17h 03mAmerican Airlines

Deal found 13/9£470

Wed 5/1106:35BHD - LAS

2 stops22h 14mMultiple Airlines

Sun 9/1106:15LAS - BHD

2 stops30h 00mMultiple Airlines

Deal found 15/9£589

Fri 31/1015:05BFS - LAX

2 stops30h 05mMultiple Airlines

Fri 7/1113:45LAX - BFS

2 stops24h 15mMultiple Airlines

Deal found 16/9£628

Fri 6/308:45BHD - LAS

1 stop18h 05mAmerican Airlines

Tue 10/321:55LAS - BHD

1 stop15h 20mAmerican Airlines

Deal found 13/9£611

Tue 3/306:35BHD - LAS

2 stops21h 22mAmerican Airlines

Thu 5/311:44LAS - BHD

2 stops38h 46mAmerican Airlines

Deal found 13/9£616

Thu 12/317:45BHD - LAX

1 stop30h 05mBritish Airways

Thu 26/322:00LAX - BHD

1 stop13h 50mBritish Airways

Deal found 14/9£4,711

Thu 12/315:05BHD - LAX

2 stops25h 16mMultiple Airlines

Thu 26/316:30LAX - BHD

1 stop14h 30mMultiple Airlines

Deal found 14/9£11,055

Last-minute flights from Northern Ireland to California
Discover last-minute flight deals from Northern Ireland to California. Data last updated 16 September 2025 and is based on user searches.

Mon 22/906:30BHD - LAS

1 stop20h 05mVirgin Atlantic

Mon 29/920:25LAS - BHD

1 stop12h 30mVirgin Atlantic

Deal found 14/9£578

Mon 22/906:30BHD - LAS

1 stop20h 05mDelta

Mon 29/913:35LAS - BHD

2 stops19h 20mDelta

Deal found 14/9£586

Mon 22/922:45BFS - LAS

2 stops27h 50mMultiple Airlines

Mon 29/920:25LAS - BFS

2 stops16h 30mMultiple Airlines

Deal found 14/9£722

Mon 22/906:55BHD - LAS

3 stops24h 04mMultiple Airlines

Mon 29/919:05LAS - BHD

2 stops17h 50mMultiple Airlines

Deal found 14/9£1,009

Wed 29/1012:50BFS - LAS

3 stops39h 15mMultiple Airlines

Wed 5/1107:00LAS - BFS

3 stops29h 20mMultiple Airlines

Deal found 14/9£548

Fri 31/1008:05BFS - SFO

2 stops35h 45mMultiple Airlines

Fri 7/1115:40SFO - BFS

2 stops22h 20mMultiple Airlines

Deal found 16/9£567

Fri 31/1015:05BFS - LAX

2 stops30h 05mMultiple Airlines

Fri 7/1113:45LAX - BFS

2 stops24h 15mMultiple Airlines

Deal found 16/9£628

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

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Thu 26/2

11:05-23:43

2 stops20h 38m

Ontario

Mon 2/3

11:05-16:05

2 stops21h 00m

£468

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Thu 5/3

10:40-23:43

2 stops21h 03m

Ontario

Mon 9/3

10:57-14:15

2 stops20h 18m

£468

BelfastSanta Ana

BHD - SNA

BHDSNA

Belfast City

Mon 9/3

09:15-22:30

2 stops20h 15m

Santa Ana J. Wayne/Orange Cnty

Wed 11/3

13:43-10:20

2 stops37h 37m

£468

BelfastOntario

BHD - ONT

BHDONT

Belfast City

Thu 5/3

11:05-21:40

2 stops18h 35m

Ontario

Mon 9/3

06:00-14:15

2 stops25h 15m

£470

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 5/3

11:05-18:45

1 stop15h 40m

San Francisco

Mon 9/3

10:37-10:40

2 stops17h 03m

£470

BelfastLas Vegas

BFS - LAS

BFSLAS

Belfast Intl

Wed 29/10

12:50-21:05

3 stops39h 15m

Las Vegas Harry Reid Intl

Wed 5/11

07:00-20:20

3 stops29h 20m

£548

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Fri 31/10

08:05-12:50

2 stops35h 45m

San Francisco

Fri 7/11

15:40-22:00

2 stops22h 20m

£567

BelfastLas Vegas

BHD - LAS

BHDLAS

Belfast City

Wed 5/11

06:35-20:49

2 stops22h 14m

Las Vegas Harry Reid Intl

Sun 9/11

06:15-20:15

2 stops30h 00m

£589

BelfastLas Vegas

BHD - LAS

BHDLAS

Belfast City

Fri 6/3

08:45-18:50

1 stop18h 05m

Las Vegas Harry Reid Intl

Tue 10/3

21:55-20:15

1 stop15h 20m

£611

BelfastLas Vegas

BHD - LAS

BHDLAS

Belfast City

Tue 3/3

06:35-19:57

2 stops21h 22m

Las Vegas Harry Reid Intl

Thu 5/3

11:44-10:30

2 stops38h 46m

£616

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 16 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, September is the cheapest month in which you can book a flight from Northern Ireland to California (average of £573). 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.

Reviews of airlines servicing California

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

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

KLM

7.8

Good

1,385 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

American Airlines

7.2

Good

10,000 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

British Airways

6.7

Okay

7,361 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Related info for your journey

How long is the flight from Northern Ireland to California?
There are many flights that can get you from Northern Ireland to California in 20h 38m. Fly via American Airlines to get the fastest option. Northern Ireland and California are separated by a distance of 5095 mi.
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, September is the cheapest month in which you can book a flight from Northern Ireland to California (average of £573). 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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Stansted to Miami flights

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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

Oakland Airport car hire

Ontario Airport car hire

Burbank Bob Hope Airport car hire

Palm Springs Airport car hire

Long Beach Municipal Airport car hire

Fresno Airterminal Airport car hire

Direct flights to United States

Top 3 airlines flying from Northern Ireland to California

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£364	Average£579	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£466	Average£517	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
KLM	Cheapest£499	Average£604	FlexibilityNo cancel fee	On-time75%	Search KLM 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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Cheapflights is completely free to use, so you can start saving the moment you arrive.

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

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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.

Cheap flights from Northern Ireland to California from £322

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 5/11. 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 16 September 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 16 September 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 16 September 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 16 September 2025.

Reviews of airlines servicing California

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.

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?

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 3 airlines 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?

100% Free

Book with Flexibility

Travel Smart

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 16 September 2025.