What is the cheapest airline that flies from California to Northern Ireland?

British Airways, Delta, and KLM are the most popular carriers operating from California to Northern Ireland

How long is the flight from California to Northern Ireland?

The average flight duration from California to Northern Ireland depends on which airport you fly into and out of. Flying from Los Angeles to Belfast Intl Airport is 13h 50m on average, while flying from Ontario to Belfast Intl Airport is 15h 45m on average. Belfast Intl Airport is the most popular airport in Northern Ireland.

When did momondo last update prices for flights from California to Northern Ireland?

Prices for flights from California to Northern Ireland refresh daily.

How old do you have to be to fly from California to Northern Ireland?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to Northern Ireland.

What documentation or ID do you need to fly to Northern Ireland?

The travel and health documents required for your trip to Northern Ireland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Northern Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£234 Cheap Flights from California to Northern Ireland in 2026

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Find the cheapest flights from California to Northern Ireland

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

17:30 - 16:05

SFO

BHD

14h 35m

1 stop

06:45 - 15:00

BHD

SFO

16h 15m

1 stop

£635British Airways

Mon, 2 Nov - Fri, 13 Nov

16:35 - 17:30

SFO

BHD

16h 55m

1 stop

20:35 - 13:50

BHD

SFO

25h 15m

1 stop

£648British Airways

Mon, 14 Sep - Wed, 16 Sep

16:30 - 16:45

LAX

BHD

17h 15m

1 stop

06:35 - 15:50

BHD

LAX

17h 15m

1 stop

£655American Airlines

Tue, 27 Oct - Tue, 3 Nov

18:10 - 17:30

LAX

BHD

15h 20m

1 stop

11:00 - 20:15

BHD

LAX

17h 15m

1 stop

£656American Airlines

Mon, 14 Sep - Fri, 25 Sep

20:10 - 22:30

LAX

BFS

19h 20m

2 stops

06:05 - 07:20

BFS

LAX

33h 15m

3 stops

£744Multiple Airlines

Wed, 28 Oct - Mon, 2 Nov

07:30 - 19:50

LAX

BFS

28h 20m

2 stops

20:15 - 15:28

BFS

LAX

27h 13m

2 stops

£745Multiple Airlines

Tue, 18 Aug - Tue, 1 Sep

12:55 - 16:55

ONT

BHD

20h 00m

2 stops

09:50 - 23:44

BHD

ONT

21h 54m

2 stops

£768Delta

Tue, 18 Aug - Wed, 2 Sep

13:45 - 09:20

SFO

BHD

35h 35m

1 stop

09:50 - 20:19

BHD

SFO

18h 29m

2 stops

£808KLM

Tue, 21 Jul - Thu, 6 Aug

14:19 - 16:55

SFO

BHD

18h 36m

2 stops

09:50 - 20:19

BHD

SFO

18h 29m

2 stops

£811KLM

Tue, 21 Jul - Thu, 6 Aug

12:00 - 16:50

ONT

BHD

21h 50m

2 stops

17:20 - 16:12

BHD

ONT

30h 52m

2 stops

£1,065Delta

Tue, 27 Oct - Mon, 2 Nov

British Airways flights from California to Northern Ireland

Our best British Airways deals on California to Northern Ireland flight tickets

British Airways

2 Nov

SFO17:30San Francisco

14h 35m

1 stop

BHD16:05Belfast City

13 Nov

BHD06:45Belfast City

16h 15m

1 stop

SFO15:00San Francisco

£635

British Airways

14 Sept

SFO16:35San Francisco

16h 55m

1 stop

BHD17:30Belfast City

16 Sept

BHD20:35Belfast City

25h 15m

1 stop

SFO13:50San Francisco

£648

British Airways

2 Nov

SFO15:54San Francisco

16h 11m

2 stops

BHD16:05Belfast City

13 Nov

BHD08:45Belfast City

18h 00m

1 stop

SFO18:45San Francisco

£651

American Airlines flights from California to Northern Ireland

Our best American Airlines deals on California to Northern Ireland flight tickets

American Airlines

27 Oct

LAX16:30Los Angeles

17h 15m

1 stop

BHD16:45Belfast City

3 Nov

BHD06:35Belfast City

17h 15m

1 stop

LAX15:50Los Angeles

£655

American Airlines

14 Sept

LAX18:10Los Angeles

15h 20m

1 stop

BHD17:30Belfast City

25 Sept

BHD11:00Belfast City

17h 15m

1 stop

LAX20:15Los Angeles

£656

American Airlines

2 Nov

SFO14:06San Francisco

17h 59m

2 stops

BHD16:05Belfast City

13 Nov

BHD06:45Belfast City

19h 39m

2 stops

SFO18:24San Francisco

£657

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 2/11

17:30-16:05

1 stop14h 35m

Belfast City

Fri 13/11

06:45-15:00

1 stop16h 15m

£635

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 14/9

16:35-17:30

1 stop16h 55m

Belfast City

Wed 16/9

20:35-13:50

1 stop25h 15m

£648

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Tue 27/10

16:30-16:45

1 stop17h 15m

Belfast City

Tue 3/11

06:35-15:50

1 stop17h 15m

£655

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Mon 14/9

18:10-17:30

1 stop15h 20m

Belfast City

Fri 25/9

11:00-20:15

1 stop17h 15m

£656

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Wed 28/10

20:10-22:30

2 stops19h 20m

Belfast Intl

Mon 2/11

06:05-07:20

3 stops33h 15m

£744

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Tue 18/8

07:30-19:50

2 stops28h 20m

Belfast Intl

Tue 1/9

20:15-15:28

2 stops27h 13m

£745

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 18/8

12:55-16:55

2 stops20h 00m

Belfast City

Wed 2/9

09:50-23:44

2 stops21h 54m

£768

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 21/7

13:45-09:20

1 stop35h 35m

Belfast City

Thu 6/8

09:50-20:19

2 stops18h 29m

£808

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 21/7

14:19-16:55

2 stops18h 36m

Belfast City

Thu 6/8

09:50-20:19

2 stops18h 29m

£811

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 27/10

12:00-16:50

2 stops21h 50m

Belfast City

Mon 2/11

17:20-16:12

2 stops30h 52m

£1,065

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from California to Northern Ireland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Northern Ireland?

In general, March is the cheapest month to fly from California to Northern Ireland. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £419. If you’re not able to fly to Northern Ireland in March, then September is your next best option. Flight prices from California to Northern Ireland during September average around £433.

Can stopping save me money on California to Northern Ireland flights?

You could potentially save up to 14% on your flight if you consider stops on a California to Northern Ireland flight.

Cheap California to Northern Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from California to Northern Ireland

Fastest flight time	13h 50m
Direct flights	None

The fastest flight from California to Northern Ireland takes 13h 50m

There are no direct flights from California to Northern Ireland. There are no popular flight routes from California to Northern Ireland.

Search flight deals

Frequently asked questions about flying from California to Northern Ireland

When did momondo last update prices for flights from California to Northern Ireland?
Prices for flights from California to Northern Ireland refresh daily.
How old do you have to be to fly from California to Northern Ireland?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to Northern Ireland.
What documentation or ID do you need to fly to Northern Ireland?
The travel and health documents required for your trip to Northern Ireland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Northern Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from California to Northern Ireland?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from California to Northern Ireland . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from California to Northern Ireland with flexible booking policies on momondo?

Yes. All flights to Northern Ireland from California on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from California to Northern Ireland?

Once you have performed a search for California to Northern Ireland flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from California to Northern Ireland right now. Can momondo alert me if prices change?

Yes. momondo can track prices for California to Northern Ireland flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.