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

KLM, British Airways, and American Airlines 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 San Francisco to Belfast Intl Airport is 14h on average, while flying from Los Angeles to Belfast Intl Airport is 14h 40m 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.

19:45 - 15:05

LAX

BFS

35h 20m

1 stop

07:30 - 18:10

BFS

LAX

42h 40m

2 stops

£549Multiple Airlines

Wed, 22 Apr - Wed, 29 Apr

16:30 - 07:40

LAX

BFS

31h 10m

1 stop

06:20 - 13:20

BFS

LAX

15h 00m

1 stop

£555Multiple Airlines

Sun, 16 Aug - Sat, 22 Aug

16:30 - 09:25

LAX

BFS

32h 55m

1 stop

18:40 - 13:35

BFS

LAX

26h 55m

1 stop

£578Multiple Airlines

Fri, 7 Aug - Wed, 19 Aug

16:35 - 17:40

SFO

BHD

17h 05m

1 stop

18:30 - 13:50

BHD

SFO

27h 20m

1 stop

£614British Airways

Sun, 26 Apr - Mon, 11 May

16:35 - 17:40

SFO

BHD

17h 05m

1 stop

18:20 - 13:50

BHD

SFO

27h 30m

1 stop

£616British Airways

Sun, 6 Sep - Wed, 9 Sep

14:22 - 17:35

ONT

BHD

19h 13m

2 stops

09:40 - 23:06

BHD

ONT

21h 26m

2 stops

£634American Airlines

Tue, 18 Aug - Tue, 1 Sep

15:37 - 17:35

SFO

BHD

17h 58m

2 stops

13:45 - 23:06

BHD

SFO

17h 21m

2 stops

£644American Airlines

Tue, 4 Aug - Tue, 18 Aug

13:45 - 16:55

SFO

BHD

19h 10m

1 stop

17:30 - 19:20

BHD

SFO

33h 50m

2 stops

£671Virgin Atlantic

Sun, 26 Apr - Mon, 11 May

07:20 - 16:55

SJC

BHD

25h 35m

2 stops

17:30 - 19:02

BHD

SJC

33h 32m

2 stops

£690Delta

Sun, 26 Apr - Mon, 11 May

06:45 - 09:20

SNA

BHD

18h 35m

2 stops

09:50 - 22:29

BHD

SNA

20h 39m

2 stops

£732Delta

Tue, 12 May - Tue, 26 May

Delta flights from California to Northern Ireland

Our best Delta deals on California to Northern Ireland flight tickets

Delta

26 Apr

SJC07:20San Jose

25h 35m

2 stops

BHD16:55Belfast City

11 May

BHD17:30Belfast City

33h 32m

2 stops

SJC19:02San Jose

£690

Delta

20 Jul

LAX16:45Los Angeles Los Angeles

16h 10m

1 stop

BHD16:55Belfast City

11 Aug

BHD17:30Belfast City

26h 20m

1 stop

LAX11:50Los Angeles Los Angeles

£701

Delta

26 Jul

LAX13:50Los Angeles Los Angeles

19h 05m

1 stop

BHD16:55Belfast City

11 Aug

BHD17:30Belfast City

26h 20m

1 stop

LAX11:50Los Angeles Los Angeles

£721

American Airlines flights from California to Northern Ireland

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

American Airlines

18 Aug

ONT14:22Ontario

19h 13m

2 stops

BHD17:35Belfast City

1 Sept

BHD09:40Belfast City

21h 26m

2 stops

ONT23:06Ontario

£634

American Airlines

4 Aug

SFO15:37San Francisco

17h 58m

2 stops

BHD17:35Belfast City

18 Aug

BHD13:45Belfast City

17h 21m

2 stops

SFO23:06San Francisco

£644

American Airlines

18 Aug

ONT13:00Ontario

18h 20m

2 stops

BHD15:20Belfast City

1 Sept

BHD09:40Belfast City

19h 28m

2 stops

ONT21:08Ontario

£672

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

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Wed 22/4

19:45-15:05

1 stop35h 20m

Belfast Intl

Wed 29/4

07:30-18:10

2 stops42h 40m

£549

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Sun 16/8

16:30-07:40

1 stop31h 10m

Belfast Intl

Sat 22/8

06:20-13:20

1 stop15h 00m

£555

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Fri 7/8

16:30-09:25

1 stop32h 55m

Belfast Intl

Wed 19/8

18:40-13:35

1 stop26h 55m

£578

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 26/4

16:35-17:40

1 stop17h 05m

Belfast City

Mon 11/5

18:30-13:50

1 stop27h 20m

£614

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 6/9

16:35-17:40

1 stop17h 05m

Belfast City

Wed 9/9

18:20-13:50

1 stop27h 30m

£616

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 18/8

14:22-17:35

2 stops19h 13m

Belfast City

Tue 1/9

09:40-23:06

2 stops21h 26m

£634

Fastest return journey

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 4/8

15:37-17:35

2 stops17h 58m

Belfast City

Tue 18/8

13:45-23:06

2 stops17h 21m

£644

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 26/4

13:45-16:55

1 stop19h 10m

Belfast City

Mon 11/5

17:30-19:20

2 stops33h 50m

£670

San JoseBelfast

SJC - BHD

SJCBHD

San Jose

Sun 26/4

07:20-16:55

2 stops25h 35m

Belfast City

Mon 11/5

17:30-19:02

2 stops33h 32m

£690

Santa AnaBelfast

SNA - BHD

SNABHD

Santa Ana J. Wayne/Orange Cnty

Tue 12/5

06:45-09:20

2 stops18h 35m

Belfast City

Tue 26/5

09:50-22:29

2 stops20h 39m

£732

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, August 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 £488. If you’re not able to fly to Northern Ireland in August, then February is your next best option. Flight prices from California to Northern Ireland during February average around £513.

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

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.