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Cheap flights from California to Belfast from £128

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 15/2. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BHD
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from California to Belfast

Keep the following information in mind while searching for California to Belfast flight deals. Data was last updated 16 January 2026.

Round-trip from

£417

One-way from

£128

Popular in

June

Cheapest in

October

Average price

£522
British Airways
  • British Airways
  • 1/3-10/3
  • 3 total stops
  • 40h 37m total
  • California to Belfast
Search Deals
British Airways
  • British Airways
  • 15/2
  • 1 total stop
  • 15h 35m total
  • California to Belfast
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£102 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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Find flight deals from California to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from California to Belfast
Explore the most affordable flight options available from California to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 January 2026.

Sun 1/323:53
LAX
-
BHD
2 stops26h 47m
British Airways
Tue 10/310:00
BHD
-
LAX
1 stop13h 50m
British Airways
Deal found 14/1£417
Sun 15/220:40
SFO
-
BHD
1 stop15h 35m
British Airways
Tue 3/315:05
BHD
-
SFO
1 stop35h 40m
British Airways
Deal found 14/1£430
Wed 25/215:30
LAX
-
BHD
1 stop17h 05m
British Airways
Sun 1/320:25
BHD
-
LAX
1 stop25h 05m
British Airways
Deal found 13/1£448
Wed 4/306:15
SFO
-
BHD
2 stops20h 00m
British Airways
Sun 8/320:25
BHD
-
SFO
1 stop26h 35m
British Airways
Deal found 15/1£463
Wed 25/217:30
SFO
-
BHD
1 stop15h 05m
British Airways
Sun 1/320:25
BHD
-
SFO
1 stop30h 20m
British Airways
Deal found 13/1£467
Fri 23/117:30
LAX
-
BHD
1 stop15h 45m
American Airlines
Tue 3/208:45
BHD
-
LAX
1 stop14h 35m
American Airlines
Deal found 14/1£476
Fri 27/214:07
SJC
-
BHD
2 stops19h 08m
British Airways
Tue 3/317:15
BHD
-
SJC
2 stops37h 16m
British Airways
Deal found 14/1£478
Wed 25/206:00
ONT
-
BHD
2 stops26h 35m
British Airways
Sun 1/309:10
BHD
-
ONT
2 stops21h 19m
British Airways
Deal found 13/1£478
Wed 4/309:23
SNA
-
BHD
2 stops23h 12m
British Airways
Sun 8/306:30
BHD
-
SNA
2 stops22h 09m
British Airways
Deal found 13/1£478
Wed 4/311:01
SJC
-
BHD
2 stops21h 34m
British Airways
Sun 8/320:25
BHD
-
SJC
2 stops44h 46m
British Airways
Deal found 13/1£482
Sun 8/206:37
SFO
-
BHD
2 stops19h 43m
British Airways
Sat 14/215:05
BHD
-
SFO
1 stop31h 55m
British Airways
Deal found 15/1£483
Sun 8/214:32
SJC
-
BHD
2 stops18h 18m
British Airways
Sat 14/218:00
BHD
-
SJC
2 stops36h 31m
British Airways
Deal found 14/1£512

Cheapflights Fare Finder

 
Customise your flight search to find flights from California to Belfast 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, Cheapflights users made 858,174 searches. Data last updated 16 January 2026.
Use the filters below to find and compare flights from California to Belfast that are best for you.

Fly from

California

Fly to

Belfast

Route

Depart

Return

Price

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Sun 1/3

23:53-10:40

2 stops26h 47m

Belfast City

Tue 10/3

10:00-16:50

1 stop13h 50m

£417

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 15/2

20:40-20:15

1 stop15h 35m

Belfast City

Tue 3/3

15:05-18:45

1 stop35h 40m

£430

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 4/3

15:30-16:35

1 stop17h 05m

Belfast City

Sun 8/3

20:25-14:30

1 stop25h 05m

£448

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 25/2

15:30-16:35

1 stop17h 05m

Belfast City

Sun 1/3

20:25-13:30

1 stop25h 05m

£448

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 4/3

06:15-10:15

2 stops20h 00m

Belfast City

Sun 8/3

20:25-16:00

1 stop26h 35m

£463

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 25/2

17:30-16:35

1 stop15h 05m

Belfast City

Sun 1/3

20:25-18:45

1 stop30h 20m

£467

San JoseBelfast

SJC - BHD

SJCBHD

San Jose

Fri 27/2

14:07-17:15

2 stops19h 08m

Belfast City

Tue 3/3

17:15-22:31

2 stops37h 16m

£478

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 4/3

14:39-19:10

2 stops20h 31m

Belfast City

Sun 8/3

09:10-22:59

2 stops21h 49m

£478

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 25/2

06:00-16:35

2 stops26h 35m

Belfast City

Sun 1/3

09:10-22:29

2 stops21h 19m

£478

Santa AnaBelfast

SNA - BHD

SNABHD

Santa Ana J. Wayne/Orange Cnty

Wed 4/3

09:23-16:35

2 stops23h 12m

Belfast City

Sun 8/3

06:30-20:39

2 stops22h 09m

£478

Flights are sorted by cheapest return flights first.

Deals found on 14/1

Showing 1-10 of 55 results
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Best time to book a flight from California to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from California 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 California to Belfast

What is the cheapest month to book a flight from California to Belfast?

Currently, March is the cheapest month in which you can book a flight from California to Belfast (average of £436). Flying from California to Belfast in June is currently the most expensive (average of £691). 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.

How much does it cost for a return flight from California to Belfast?

Related info for your journey

Find useful and relevant information for your journey from California to Belfast. 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 California to Belfast?

    For as low as £417, British Airways can have you in Belfast from California in 26h 47m. The distance from California to Belfast is about 5128 mi.

  • What are the most popular routes from California to Belfast?

    While some choose either San Francisco - Belfast City or Los Angeles - Belfast Intl, San Francisco - Belfast Intl is the most popular route from California to Belfast.

  • Can I find deals for flights from California to Belfast that include hotel bookings?

    Yes. In addition to deals on California to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from California to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to Belfast.

  • Can I find deals for business class flights from California to Belfast?

    Yes. Cheapflights offers flight deals from California to Belfast 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 California to Belfast?

    Currently, March is the cheapest month in which you can book a flight from California to Belfast (average of £436). Flying from California to Belfast in June is currently the most expensive (average of £691). 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

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Alternative routes for California to Belfast

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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 California to Belfast?

Deals for California to Belfast flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from California to Belfast?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from California to Belfast.

Can Cheapflights find flights from California to Belfast with no change fees?

Certainly. Search results for flights to Belfast from California shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from California to Belfast become cheaper?

Of course! You can now track prices for flights from California to Belfast and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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