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Cheap flights from California to Northern Ireland from $313

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to Northern Ireland departing on 5/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from California to Northern Ireland

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
6:00 pm - 7:30 am
LAX
-
BHD
29h 30m
1 stop
British Airways Logo
10:40 am - 7:30 pm
BHD
-
LAX
15h 50m
1 stop
$640British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
5:20 pm - 3:30 pm
LAS
-
BHD
14h 10m
1 stop
British Airways Logo
6:30 am - 8:00 pm
BHD
-
LAS
21h 30m
1 stop
$641British Airways
Mon, Apr 13 - Fri, Apr 24
British Airways Logo
11:51 am - 5:30 pm
LAS
-
BHD
21h 39m
2 stops
British Airways Logo
6:30 am - 8:00 pm
BHD
-
LAS
21h 30m
1 stop
$642British Airways
Mon, Apr 13 - Fri, Apr 24
British Airways Logo
3:30 pm - 7:30 am
LAX
-
BHD
32h 00m
1 stop
British Airways Logo
9:10 am - 3:50 pm
BHD
-
LAX
14h 40m
1 stop
$642British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
3:55 pm - 6:45 pm
LAS
-
BHD
18h 50m
2 stops
British Airways Logo
9:30 am - 9:56 pm
BHD
-
LAS
20h 26m
2 stops
$645British Airways
Mon, Apr 13 - Fri, Apr 24
American Airlines Logo
8:20 pm - 7:40 pm
LAX
-
BHD
15h 20m
1 stop
American Airlines Logo
6:30 am - 8:20 pm
BHD
-
LAX
21h 50m
1 stop
$695American Airlines
Tue, Apr 14 - Sun, Apr 19
American Airlines Logo
8:20 pm - 6:55 pm
LAX
-
BHD
14h 35m
1 stop
American Airlines Logo
11:00 am - 9:56 pm
BHD
-
LAX
18h 56m
2 stops
$705American Airlines
Tue, Apr 14 - Sun, Apr 19
Multiple Airlines Logo
5:35 pm - 9:15 pm
SFO
-
BFS
19h 40m
2 stops
Multiple Airlines Logo
12:35 pm - 1:50 pm
BFS
-
SFO
33h 15m
1 stop
$866Multiple Airlines
Fri, May 15 - Fri, May 29
KLM Logo
11:30 am - 4:55 pm
SJC
-
BHD
21h 25m
2 stops
KLM Logo
5:30 pm - 5:04 pm
BHD
-
SJC
31h 34m
2 stops
$882KLM
Tue, Jun 9 - Mon, Jun 15
Multiple Airlines Logo
8:30 am - 8:25 pm
SFO
-
BFS
28h 55m
3 stops
Multiple Airlines Logo
7:05 am - 8:35 pm
BFS
-
SFO
20h 30m
2 stops
$926Multiple Airlines
Thu, Mar 19 - Thu, Mar 26

American Airlines flights from California to Northern Ireland

Our best American Airlines deals on California to Northern Ireland flight tickets
American Airlines
Apr 14
LAX8:20 pmLos Angeles
15h 20m
1 stop
BHD7:40 pmBelfast City
Apr 19
BHD6:30 amBelfast City
21h 50m
1 stop
LAX8:20 pmLos Angeles
$695
American Airlines
Apr 14
LAX8:20 pmLos Angeles
14h 35m
1 stop
BHD6:55 pmBelfast City
Apr 19
BHD11:00 amBelfast City
18h 56m
2 stops
LAX9:56 pmLos Angeles
$705
American Airlines
Aug 2
LAS3:59 pmLas Vegas Harry Reid Intl
17h 41m
2 stops
BHD5:40 pmBelfast City
Aug 15
BHD9:35 amBelfast City
20h 15m
2 stops
LAS9:50 pmLas Vegas Harry Reid Intl
$786

British Airways flights from California to Northern Ireland

Our best British Airways deals on California to Northern Ireland flight tickets
British Airways
Mar 4
LAX9:00 pmLos Angeles
26h 30m
1 stop
BHD7:30 amBelfast City
Mar 8
BHD6:30 amBelfast City
17h 20m
1 stop
LAX3:50 pmLos Angeles
$640
British Airways
Apr 13
LAS5:20 pmLas Vegas Harry Reid Intl
14h 10m
1 stop
BHD3:30 pmBelfast City
Apr 24
BHD6:30 amBelfast City
21h 30m
1 stop
LAS8:00 pmLas Vegas Harry Reid Intl
$641
British Airways
Apr 13
LAS11:51 amLas Vegas Harry Reid Intl
21h 39m
2 stops
BHD5:30 pmBelfast City
Apr 24
BHD6:30 amBelfast City
21h 30m
1 stop
LAS8:00 pmLas Vegas Harry Reid Intl
$642

momondo Fare Finder

 
Customize your flight search to find flights from California to Northern Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 5, 2026.
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

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 3/4

6:00 pm-7:30 am

1 stop29h 30m

Belfast City

Sun 3/8

10:40 am-7:30 pm

1 stop15h 50m

$640

Las VegasBelfast

LAS - BHD

LASBHD

Las Vegas Harry Reid Intl

Mon 4/13

5:20 pm-3:30 pm

1 stop14h 10m

Belfast City

Fri 4/24

6:30 am-8:00 pm

1 stop21h 30m

$641

Las VegasBelfast

LAS - BHD

LASBHD

Las Vegas Harry Reid Intl

Mon 4/13

11:51 am-5:30 pm

2 stops21h 39m

Belfast City

Fri 4/24

6:30 am-8:00 pm

1 stop21h 30m

$642

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 3/4

3:30 pm-7:30 am

1 stop32h 00m

Belfast City

Sun 3/8

9:10 am-3:50 pm

1 stop14h 40m

$642

Las VegasBelfast

LAS - BHD

LASBHD

Las Vegas Harry Reid Intl

Mon 4/13

3:55 pm-6:45 pm

2 stops18h 50m

Belfast City

Fri 4/24

9:30 am-9:56 pm

2 stops20h 26m

$645

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Tue 4/14

8:20 pm-7:40 pm

1 stop15h 20m

Belfast City

Sun 4/19

6:30 am-8:20 pm

1 stop21h 50m

$695

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Tue 4/14

8:20 pm-6:55 pm

1 stop14h 35m

Belfast City

Sun 4/19

11:00 am-9:56 pm

2 stops18h 56m

$705

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Fri 5/15

5:35 pm-9:15 pm

2 stops19h 40m

Belfast Intl

Fri 5/29

12:35 pm-1:50 pm

1 stop33h 15m

$866

San JoseBelfast

SJC - BHD

SJCBHD

San Jose

Tue 6/9

11:30 am-4:55 pm

2 stops21h 25m

Belfast City

Mon 6/15

5:30 pm-5:04 pm

2 stops31h 34m

$882

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 3/19

8:30 am-8:25 pm

3 stops28h 55m

Belfast Intl

Thu 3/26

7:05 am-8:35 pm

2 stops20h 30m

$926

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Northern Ireland from

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

What is the cheapest month to fly to Northern Ireland?

The cheapest month to fly to Northern Ireland from California is in October. Flight prices, which tend to average around $633, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Northern Ireland from California during February instead. Flights to Northern Ireland in February, while not as cheap as those in October, still average around $685.

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

You could potentially save up to 43% 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 are updated daily.

  • How many operators does momondo search 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 AirwaysPriceFrom $586Free CancellationRating
6.7
7,716 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.

An easier way to manage your Northern Ireland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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Find better results for your trip to Northern Ireland

Popular cities in Northern Ireland

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom $341
Flights to Manchesterfrom $376
Flights to Edinburghfrom $354
Flights to Birminghamfrom $397
Flights to Glasgowfrom $359
Flights to Newcastle upon Tynefrom $517
Flights to Belfastfrom $451
Flights to Bristolfrom $390
Flights to Invernessfrom $423
Flights to Liverpoolfrom $438
Flights to Aberdeenfrom $533
Flights to Leedsfrom $446