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?

Flight times vary depending on what airport in California you fly out of and what airport in Northern Ireland you fly into. For example, flying from San Francisco to Belfast Intl Airport takes 14h on average. On the other hand, flying from Los Angeles to Belfast Intl Airport takes 14h 40m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

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

Prices for flights from California to Northern Ireland are updated daily.

How many operators does momondo search for flights from California to Northern Ireland?

As of March 2026, there is 1 operator available to choose from for flights from California to Northern Ireland.

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 required travel and health documents for your Northern Ireland trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Northern Ireland. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$313 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 round-trip flights

Enter your travel dates to find the best prices.

7:45 pm - 3:05 pm

LAX

BFS

35h 20m

1 stop

7:30 am - 6:10 pm

BFS

LAX

42h 40m

2 stops

$733Multiple Airlines

Wed, Apr 22 - Wed, Apr 29

4:30 pm - 7:40 am

LAX

BFS

31h 10m

1 stop

6:20 am - 1:20 pm

BFS

LAX

15h 00m

1 stop

$741Multiple Airlines

Sun, Aug 16 - Sat, Aug 22

4:30 pm - 9:25 am

LAX

BFS

32h 55m

1 stop

6:40 pm - 1:35 pm

BFS

LAX

26h 55m

1 stop

$771Multiple Airlines

Fri, Aug 7 - Wed, Aug 19

4:35 pm - 5:40 pm

SFO

BHD

17h 05m

1 stop

6:30 pm - 1:50 pm

BHD

SFO

27h 20m

1 stop

$819British Airways

Sun, Apr 26 - Mon, May 11

4:35 pm - 5:40 pm

SFO

BHD

17h 05m

1 stop

6:20 pm - 1:50 pm

BHD

SFO

27h 30m

1 stop

$822British Airways

Sun, Sep 6 - Wed, Sep 9

2:22 pm - 5:35 pm

ONT

BHD

19h 13m

2 stops

9:40 am - 11:06 pm

BHD

ONT

21h 26m

2 stops

$846American Airlines

Tue, Aug 18 - Tue, Sep 1

3:37 pm - 5:35 pm

SFO

BHD

17h 58m

2 stops

1:45 pm - 11:06 pm

BHD

SFO

17h 21m

2 stops

$859American Airlines

Tue, Aug 4 - Tue, Aug 18

1:45 pm - 4:55 pm

SFO

BHD

19h 10m

1 stop

5:30 pm - 7:20 pm

BHD

SFO

33h 50m

2 stops

$895Virgin Atlantic

Sun, Apr 26 - Mon, May 11

7:20 am - 4:55 pm

SJC

BHD

25h 35m

2 stops

5:30 pm - 7:02 pm

BHD

SJC

33h 32m

2 stops

$921Delta

Sun, Apr 26 - Mon, May 11

6:45 am - 9:20 am

SNA

BHD

18h 35m

2 stops

9:50 am - 10:29 pm

BHD

SNA

20h 39m

2 stops

$977Delta

Tue, May 12 - Tue, May 26

Delta flights from California to Northern Ireland

Our best Delta deals on California to Northern Ireland flight tickets

Delta

Apr 26

SJC7:20 amSan Jose

25h 35m

2 stops

BHD4:55 pmBelfast City

May 11

BHD5:30 pmBelfast City

33h 32m

2 stops

SJC7:02 pmSan Jose

$921

Delta

Jul 20

LAX4:45 pmLos Angeles Los Angeles

16h 10m

1 stop

BHD4:55 pmBelfast City

Aug 11

BHD5:30 pmBelfast City

26h 20m

1 stop

LAX11:50 amLos Angeles Los Angeles

$936

Delta

Jul 26

LAX1:50 pmLos Angeles Los Angeles

35h 30m

1 stop

BHD9:20 amBelfast City

Aug 13

BHD5:30 pmBelfast City

26h 20m

1 stop

LAX11:50 amLos Angeles Los Angeles

$963

American Airlines flights from California to Northern Ireland

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

American Airlines

Aug 18

ONT2:22 pmOntario

19h 13m

2 stops

BHD5:35 pmBelfast City

Sep 1

BHD9:40 amBelfast City

21h 26m

2 stops

ONT11:06 pmOntario

$846

American Airlines

Aug 4

SFO3:37 pmSan Francisco

17h 58m

2 stops

BHD5:35 pmBelfast City

Aug 18

BHD1:45 pmBelfast City

17h 21m

2 stops

SFO11:06 pmSan Francisco

$859

American Airlines

Aug 18

ONT1:00 pmOntario

18h 20m

2 stops

BHD3:20 pmBelfast City

Sep 1

BHD9:40 amBelfast City

19h 28m

2 stops

ONT9:08 pmOntario

$897

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 round-trip

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Wed 4/22

7:45 pm-3:05 pm

1 stop35h 20m

Belfast Intl

Wed 4/29

7:30 am-6:10 pm

2 stops42h 40m

$733

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Sun 8/16

4:30 pm-7:40 am

1 stop31h 10m

Belfast Intl

Sat 8/22

6:20 am-1:20 pm

1 stop15h 00m

$741

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Fri 8/7

4:30 pm-9:25 am

1 stop32h 55m

Belfast Intl

Wed 8/19

6:40 pm-1:35 pm

1 stop26h 55m

$771

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 4/26

4:35 pm-5:40 pm

1 stop17h 05m

Belfast City

Mon 5/11

6:30 pm-1:50 pm

1 stop27h 20m

$819

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 9/6

4:35 pm-5:40 pm

1 stop17h 05m

Belfast City

Wed 9/9

6:20 pm-1:50 pm

1 stop27h 30m

$822

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 8/18

2:22 pm-5:35 pm

2 stops19h 13m

Belfast City

Tue 9/1

9:40 am-11:06 pm

2 stops21h 26m

$846

Quickest round-trip

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 8/4

3:37 pm-5:35 pm

2 stops17h 58m

Belfast City

Tue 8/18

1:45 pm-11:06 pm

2 stops17h 21m

$859

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 4/26

1:45 pm-4:55 pm

1 stop19h 10m

Belfast City

Mon 5/11

5:30 pm-7:20 pm

2 stops33h 50m

$895

San JoseBelfast

SJC - BHD

SJCBHD

San Jose

Sun 4/26

7:20 am-4:55 pm

2 stops25h 35m

Belfast City

Mon 5/11

5:30 pm-7:02 pm

2 stops33h 32m

$921

Santa AnaBelfast

SNA - BHD

SNABHD

Santa Ana J. Wayne/Orange Cnty

Tue 5/12

6:45 am-9:20 am

2 stops18h 35m

Belfast City

Tue 5/26

9:50 am-10:29 pm

2 stops20h 39m

$977

Flights are sorted by cheapest round-trip 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?

The cheapest month to fly to Northern Ireland from California is in August. Flight prices, which tend to average around $651, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of August, then book flights to Northern Ireland from California during February instead. Flights to Northern Ireland in February, while not as cheap as those in August, still average around $685.

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

You could potentially save up to 37% 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	12h 30m
Direct flights	None

The fastest flight from California to Northern Ireland takes 12h 30m

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 are updated daily.
How many operators does momondo search for flights from California to Northern Ireland?
As of March 2026, there is 1 operator available to choose from for flights from California to Northern Ireland.
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 required travel and health documents for your Northern Ireland trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Northern Ireland. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from California to Northern Ireland

Compare and see reviews for airlines that fly from California to Northern Ireland with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $583	Free Cancellation	Rating 6.7 7,820 reviews		Search British Airways flights

Why use momondo?

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

Finding the right flight to Northern Ireland from California is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Northern Ireland quick and easy, saving you time and money.

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

All flight searches from California to Northern Ireland on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between California and Northern Ireland by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to Northern Ireland from California are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.