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Cheap flights from California to Belfast from £234

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BHD
24 Apr — 1 May1
1 adult
1 adult, Economy, 0 bags

Cheap 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 25 March 2026.

Wed 22/419:45
LAX
-
BFS
1 stop35h 20m
Multiple Airlines
Wed 29/407:30
BFS
-
LAX
2 stops42h 40m
Multiple Airlines
Deal found 25/3£547
Mon 20/411:20
LAX
-
BFS
3 stops28h 00m
Multiple Airlines
Tue 5/523:30
BFS
-
LAX
3 stops30h 35m
Multiple Airlines
Deal found 24/3£578
Mon 7/916:30
LAX
-
BFS
1 stop22h 50m
Multiple Airlines
Mon 21/914:40
BFS
-
LAX
1 stop27h 20m
Multiple Airlines
Deal found 21/3£594
Sun 26/416:35
SFO
-
BHD
1 stop17h 05m
British Airways
Mon 11/518:30
BHD
-
SFO
1 stop27h 20m
British Airways
Deal found 25/3£612
Mon 9/1120:40
SFO
-
BHD
1 stop15h 35m
British Airways
Fri 13/1111:30
BHD
-
SFO
1 stop15h 15m
British Airways
Deal found 24/3£614
Tue 4/819:30
SFO
-
BHD
1 stop16h 10m
British Airways
Tue 18/818:20
BHD
-
SFO
1 stop27h 30m
British Airways
Deal found 22/3£618
Tue 15/920:55
LAX
-
BHD
1 stop15h 40m
British Airways
Mon 28/919:35
BHD
-
LAX
1 stop26h 10m
British Airways
Deal found 23/3£619
Thu 23/716:30
LAX
-
BFS
1 stop32h 30m
Multiple Airlines
Wed 12/818:40
BFS
-
LAX
1 stop26h 55m
Multiple Airlines
Deal found 22/3£621
Sun 6/1218:00
LAX
-
BHD
1 stop14h 50m
British Airways
Wed 9/1206:35
BHD
-
LAX
1 stop17h 15m
British Airways
Deal found 24/3£623
Mon 7/920:55
LAX
-
BHD
1 stop14h 30m
British Airways
Mon 21/915:20
BHD
-
LAX
1 stop35h 00m
British Airways
Deal found 21/3£626
Tue 18/814:22
ONT
-
BHD
2 stops19h 13m
American Airlines
Tue 1/909:40
BHD
-
ONT
2 stops21h 26m
American Airlines
Deal found 23/3£632
Tue 18/820:55
LAX
-
BHD
1 stop14h 00m
British Airways
Tue 1/909:40
BHD
-
LAX
1 stop16h 40m
British Airways
Deal found 25/3£639

Find flight deals from California to Belfast

Keep the following information in mind while searching for California to Belfast flight deals. Data was last updated 25 March 2026.

Round-trip from

£547

One-way from

£234

Popular in

June

Cheapest in

August

Average price

£738
22/4-29/4
  • 22/4-29/4
  • 3 total stops
  • 78h 00m total
  • California to Belfast
Search Deals
KLM
  • KLM
  • 1/9
  • 1 total stop
  • 19h 10m total
  • California to Belfast
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£121 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 25 March 2026.
Use the filters below to find and compare flights from California to Belfast 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

Mon 20/4

11:20-23:20

3 stops28h 00m

Belfast Intl

Tue 5/5

23:30-22:05

3 stops30h 35m

£578

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Mon 7/9

16:30-23:20

1 stop22h 50m

Belfast Intl

Mon 21/9

14:40-10:00

1 stop27h 20m

£594

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 6/9

16:35-17:40

1 stop17h 05m

Belfast City

Wed 9/9

16:05-13:50

1 stop29h 45m

£614

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Thu 23/7

16:30-09:00

1 stop32h 30m

Belfast Intl

Wed 12/8

18:40-13:35

1 stop26h 55m

£621

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 5/5

12:55-23:20

2 stops26h 25m

Belfast Intl

Tue 12/5

20:15-16:40

2 stops28h 25m

£648

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Mon 1/6

16:30-23:20

1 stop22h 50m

Belfast Intl

Fri 12/6

19:55-13:20

1 stop25h 25m

£656

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles Los Angeles

Tue 15/9

12:00-10:40

1 stop14h 40m

Belfast Intl

Mon 28/9

15:35-10:00

1 stop26h 25m

£657

San JoseBelfast

SJC - BHD

SJCBHD

San Jose

Tue 4/8

16:25-18:55

2 stops18h 30m

Belfast City

Tue 18/8

09:40-21:56

2 stops20h 16m

£666

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Mon 20/4

09:10-09:20

2 stops16h 10m

Belfast City

Mon 27/4

17:30-14:45

1 stop29h 15m

£680

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles Los Angeles

Mon 7/9

16:45-16:55

1 stop16h 10m

Belfast City

Mon 21/9

09:50-00:50

2 stops23h 00m

£682

Flights are sorted by cheapest return flights first.

Deals found on 23/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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 £435). Flying from California to Belfast in June is currently the most expensive (average of £692). 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 £680, British Airways can have you in Belfast from California in 16h 10m. The distance from California to Belfast is about 5128 mi. This flight may include one or multiple stops.

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

    While some choose either Los Angeles Los Angeles - Belfast City or San Francisco - Belfast City, Los Angeles Los Angeles - 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 £435). Flying from California to Belfast in June is currently the most expensive (average of £692). 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

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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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