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Cheap flights from California to Belfast from £258

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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BHD
31 Dec — 7 Jan1
1 adult
1 adult, Economy, 0 bags

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 1 December 2025.

Sat 6/1214:00SFO - BHD
2 stops18h 50mKLM
Fri 12/1217:20BHD - SFO
1 stop26h 30mKLM
Deal found 1/12£542
Sat 6/1220:40SFO - BHD
1 stop27h 45mBritish Airways
Fri 12/1219:35BHD - SFO
1 stop31h 10mBritish Airways
Deal found 29/11£631
Mon 29/1216:35LAX - BHD
1 stop18h 00mMultiple Airlines
Mon 5/119:25BHD - LAX
2 stops49h 45mMultiple Airlines
Deal found 29/11£880
Mon 29/1217:20SFO - BHD
2 stops34h 55mMultiple Airlines
Mon 5/119:25BHD - SFO
2 stops52h 10mMultiple Airlines
Deal found 1/12£888
Mon 29/1217:30SFO - BHD
1 stop17h 05mBritish Airways
Mon 5/119:25BHD - SFO
2 stops33h 23mBritish Airways
Deal found 1/12£892
Mon 29/1213:55SFO - BHD
1 stop18h 55mDelta
Mon 5/117:20BHD - SFO
1 stop26h 30mDelta
Deal found 1/12£984
Mon 29/1220:15LAX - BHD
2 stops32h 00mAer Lingus
Mon 5/117:55BHD - LAX
2 stops56h 35mAer Lingus
Deal found 29/11£1,116
Mon 29/1219:55SFO - BFS
1 stop17h 45mMultiple Airlines
Mon 5/120:50BFS - SFO
2 stops35h 09mMultiple Airlines
Deal found 1/12£1,135
Mon 29/1220:15LAX - BFS
2 stops16h 00mMultiple Airlines
Mon 5/119:20BFS - LAX
3 stops27h 55mMultiple Airlines
Deal found 29/11£1,249
Wed 17/1207:45LAX - BHD
2 stops22h 20mMultiple Airlines
Sun 4/107:00BHD - LAX
2 stops19h 30mMultiple Airlines
Deal found 29/11£1,651
Mon 22/1220:15LAX - BHD
2 stops36h 35mMultiple Airlines
Sat 3/118:00BHD - LAX
2 stops47h 56mMultiple Airlines
Deal found 30/11£1,704
Mon 22/1220:15LAX - BHD
2 stops36h 05mAer Lingus
Sat 3/107:15BHD - LAX
2 stops19h 15mAer Lingus
Deal found 29/11£1,713

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 1 December 2025.

Round-trip from

£415

One-way from

£258

Popular in

June

Cheapest in

October

Average price

£865
British Airways
  • British Airways
  • 1/2-26/2
  • 2 total stops
  • 31h 15m total
  • California to Belfast
Search Deals
6/2
  • 6/2
  • 2 total stops
  • 23h 30m total
  • California to Belfast
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£114 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 1 December 2025.
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

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 1/2

20:40-20:15

1 stop15h 35m

Belfast City

Thu 26/2

11:05-18:45

1 stop15h 40m

£415

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Mon 23/3

15:28-16:05

2 stops17h 37m

Belfast City

Tue 31/3

09:35-18:25

1 stop16h 50m

£431

San JoseBelfast

SJC - BHD

SJCBHD

San Jose

Sun 1/2

14:32-16:50

2 stops18h 18m

Belfast City

Thu 26/2

10:40-22:26

2 stops19h 46m

£433

Santa AnaBelfast

SNA - BHD

SNABHD

Santa Ana J. Wayne/Orange Cnty

Sun 1/2

08:05-10:20

2 stops18h 15m

Belfast City

Thu 26/2

10:40-22:46

2 stops20h 06m

£433

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Fri 23/1

21:00-19:15

1 stop14h 15m

Belfast City

Tue 3/2

11:25-18:30

1 stop15h 05m

£434

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 28/1

21:00-20:15

1 stop15h 15m

Belfast City

Sun 1/2

20:25-13:30

1 stop25h 05m

£451

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Fri 6/2

17:30-17:15

1 stop15h 45m

Belfast City

Fri 20/2

06:45-15:00

1 stop16h 15m

£452

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Sat 31/1

00:30-10:20

2 stops25h 50m

Belfast City

Thu 26/2

09:05-15:50

1 stop14h 45m

£464

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 11/2

17:30-16:35

1 stop15h 05m

Belfast City

Sun 15/2

20:25-15:00

1 stop26h 35m

£470

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 1/2

07:16-10:20

2 stops19h 04m

Belfast City

Thu 26/2

10:40-22:04

2 stops19h 24m

£480

Flights are sorted by cheapest return flights first.

Deals found on 1/12

Showing 1-10 of 38 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 £443). Flying from California to Belfast in June is currently the most expensive (average of £700). 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.

What is the cheapest time of day to fly from CA to BFS?

Find hourly flight availability from California to Belfast. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 December 2025.

One of the essential ways to save on airfare from California to Belfast is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at midday could potentially save you up to 26% on airfare.

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 £415, British Airways can have you in Belfast from California in 15h 35m. The distance from California to Belfast is about 5038 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from California to Belfast one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £316. Aer Lingus flights start at £562 while deals on KLM start at £959 one-way.

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

    While some choose either Los Angeles - Belfast City or San Francisco - Belfast Intl, 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 £443). Flying from California to Belfast in June is currently the most expensive (average of £700). 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

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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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