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Cheap flights from California to Belfast from £238

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BHD
9 May — 16 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 9 April 2026.

Sun 6/916:35
SFO
-
BHD
1 stop17h 05m
British Airways
Wed 16/920:35
BHD
-
SFO
1 stop25h 15m
British Airways
Deal found 6/4£636
Sun 6/1220:40
SFO
-
BHD
1 stop14h 00m
British Airways
Thu 10/1215:05
BHD
-
SFO
1 stop31h 55m
British Airways
Deal found 6/4£648
Wed 6/519:30
SFO
-
BHD
1 stop15h 15m
British Airways
Thu 14/520:35
BHD
-
SFO
1 stop25h 15m
British Airways
Deal found 5/4£651
Wed 2/916:20
LAX
-
BHD
1 stop15h 20m
American Airlines
Wed 16/911:35
BHD
-
LAX
1 stop16h 40m
American Airlines
Deal found 6/4£656
Tue 1/1215:30
LAX
-
BHD
1 stop17h 15m
British Airways
Thu 3/1220:00
BHD
-
LAX
1 stop30h 25m
British Airways
Deal found 6/4£657
Sun 6/911:22
SFO
-
BHD
2 stops19h 13m
American Airlines
Wed 16/911:35
BHD
-
SFO
2 stops19h 05m
American Airlines
Deal found 6/4£658
Wed 18/1117:30
SFO
-
BHD
1 stop15h 05m
British Airways
Mon 30/1119:25
BHD
-
SFO
1 stop27h 35m
British Airways
Deal found 8/4£667
Tue 18/814:22
ONT
-
BHD
2 stops20h 33m
American Airlines
Tue 1/909:40
BHD
-
ONT
2 stops19h 28m
American Airlines
Deal found 4/4£667
Mon 14/920:55
LAX
-
BHD
1 stop15h 40m
British Airways
Mon 28/919:35
BHD
-
LAX
1 stop26h 10m
British Airways
Deal found 5/4£670
Tue 18/820:55
LAX
-
BHD
1 stop14h 00m
British Airways
Tue 1/906:30
BHD
-
LAX
1 stop19h 50m
British Airways
Deal found 4/4£674
Wed 6/511:52
SFO
-
BHD
2 stops17h 43m
American Airlines
Thu 14/512:45
BHD
-
SFO
2 stops19h 06m
American Airlines
Deal found 5/4£674
Wed 2/910:15
LAX
-
BHD
2 stops19h 20m
British Airways
Wed 16/911:35
BHD
-
LAX
2 stops19h 35m
British Airways
Deal found 6/4£677

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 9 April 2026.

Round-trip from

£636

One-way from

£238

Popular in

June

Cheapest in

October
British Airways
  • British Airways
  • 6/9-16/9
  • 2 total stops
  • 42h 20m total
  • California to Belfast
Search Deals
British Airways
  • British Airways
  • 12/8
  • 1 total stop
  • 15h 05m total
  • California to Belfast
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£129 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
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 9 April 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

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 6/9

16:35-17:40

1 stop17h 05m

Belfast City

Wed 16/9

20:35-13:50

1 stop25h 15m

£636

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Mon 7/9

20:55-19:25

1 stop14h 30m

Belfast City

Thu 10/9

19:30-14:55

1 stop27h 25m

£657
Fastest return journey

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Sun 27/9

17:05-14:35

1 stop13h 30m

Belfast City

Thu 1/10

09:35-18:20

1 stop16h 45m

£657

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 17/8

13:00-20:35

2 stops23h 35m

Belfast City

Wed 2/9

06:30-21:08

2 stops22h 38m

£697

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 18/8

13:00-19:40

2 stops22h 40m

Belfast City

Wed 2/9

10:05-23:06

2 stops21h 01m

£697

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 19/8

13:00-18:45

2 stops21h 45m

Belfast City

Wed 2/9

06:30-21:08

2 stops22h 38m

£697

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Thu 10/9

16:35-18:45

1 stop18h 10m

Belfast City

Mon 14/9

11:35-13:50

1 stop34h 15m

£697

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Sat 5/9

17:30-19:20

2 stops17h 50m

Belfast City

Wed 16/9

10:05-18:20

1 stop16h 15m

£697

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Thu 7/5

07:05-10:10

2 stops19h 05m

Belfast City

Thu 14/5

06:30-17:40

2 stops19h 10m

£712

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 17/8

16:54-18:45

2 stops17h 51m

Belfast City

Mon 31/8

06:30-23:06

2 stops24h 36m

£714

Flights are sorted by cheapest return flights first.

Deals found on 5/4

Showing 1-10 of 57 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 £434). Flying from California to Belfast in June is currently the most expensive (average of £904). 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.

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 £636, British Airways can have you in Belfast from California in 17h 05m. The distance from California to Belfast is about 5038 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 - Belfast Intl or San Francisco - Belfast Intl, Los Angeles - Belfast City 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 £434). Flying from California to Belfast in June is currently the most expensive (average of £904). 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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