£433 Find Cheap Flights from Northern Ireland to California

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1 adult, Economy

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Good to know - Cheap tickets from Northern Ireland to California

Low seasonFebruary
High seasonJuly
Cheapest flight£433
Best time to beat the crowds (18% less expensive on average)
Most popular time to fly (29% more expensive on average)
Flight from Belfast Intl Airport to San Francisco

FAQs for booking flights from Northern Ireland to California

  • How does KAYAK find such low prices on flights from Northern Ireland to California?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Northern Ireland to California.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Northern Ireland to California?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Northern Ireland to California is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Northern Ireland to California?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Northern Ireland to California with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Northern Ireland to California?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Northern Ireland to California up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest day to fly to California?

    Based on KAYAK data, the cheapest day to fly to California is Saturday when return tickets can be as cheap as £541. On the other hand, the most expensive day to fly is Friday, when return prices are £794 on average.

  • What is the cheapest time of day to fly to California?

    The cheapest time of day to fly to California is generally in the evening, when round-trip flights cost £710 on average. Morning departures are around 17% more expensive than evening flights, on average. The most expensive time of day to fly to California is generally in the morning, which is peak travel time and where the average cost of a ticket is £828.

  • What is the cheapest month to fly from Northern Ireland to California?

    The cheapest month for flights from Northern Ireland to California is November, when tickets cost £414 (return) on average. On the other hand, the most expensive months are December and October, when the average cost of round-trip tickets is £707 and £651 respectively.

  • How long is the flight to California?

    An average direct flight from Northern Ireland to California takes 20h 58m, covering a distance of 5040 miles. The shortest route is Belfast Intl Airport (BFS) to Los Angeles (LAX) with an average flight time of 15h 00m.

  • What are the most popular destinations in California?

    Based on KAYAK flight searches, the most popular destination is Los Angeles (27% of total searches to California). The next most popular destinations are Santa Ana (22%) and Ontario (21%). Searches for flights to San Francisco (18%) and to Las Vegas (12%) are also popular.

Top airlines flying from Northern Ireland to California

 
Need help choosing which airline to fly with from Northern Ireland to California? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 10000 reviews
6.9Entertainment
7.2Comfort
6.5Food
7.5Boarding
8.0Crew
Airline reviews

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

8.0 ExcellentJacqueline, Jun 2025PHL - LAX
Read more American Airlines reviews

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

Long 5 hour and 45 min flight and only one drink service and cookie snack

One bottle of water and a package of cookies for comfort plus. We had to literally beg a flight attendant for an extra bottle of water later in the flight due to feeling dehydrated.

Flight boarded from Gate 39 at OGG, the farthest gate in the terminal. There were no Hawaiian themed amenities for the flight. The first class service was mediocre at best; I received not special welcome or recognition as an executive platinum member of American Advantage program. The flight attendants were more concerned with their cell phones than saying "thank you" to the passengers as we disembarked. Fortunately, the flight arrived at LAX a few minutes early.

Bigger seats. Board back to front! Disembark front to back!

Extraordinary service in business class, and very good breakfast and snacks. A really lovely flight.

This flight didn’t happen because AA agents didn’t let us board the flight

Plane was pretty clean, staff was friendly and helpful, flight left about on time arrived early. Took a long time to board and get off the plane - carry on items didn't have enough room so people had to move all around to find places.

The service and food needs to improve to catch up with other international flights

Would have been good to have a meal since it was a 5.5 hour flight

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Boarding was fairly chaotic. One of your employees clipped my ankle as he was passing with an empty wheelchair and not only did not apologize but stated something to the effect of “oh forGod’s sake.” There was plenty of room for him to pass. otherwise, everything was excellent.

Fantastic! Great seats! Friendly staff! Amazing selection of shows and movies! Smooth ride! I don’t know what more I could have asked for honestly. They made flying a breeze this time around.

Book cheap flights from Northern Ireland to California

Recent return flight deals

12/9Fri
1 stopBritish Airways
26h 20mBHD-SFO
19/9Fri
2 stopsBritish Airways
27h 40mSFO-BHD
£444
2/9Tue
2 stopsBritish Airways
21h 22mBHD-SNA
9/9Tue
2 stopsBritish Airways
17h 25mSNA-BHD
£459
12/9Fri
2 stops
30h 30mBHD-SFO
19/9Fri
2 stops
27h 40mSFO-BHD
£500
13/7Sun
2 stops
32h 24mBHD-LAX
20/7Sun
2 stops
25h 21mLAX-BHD
£516
12/9Fri
1 stopKLM
13h 15mBHD-SFO
19/9Fri
1 stopKLM
23h 30mSFO-BHD
£522
23/9Tue
1 stopFinnair
26h 35mBHD-LAX
30/9Tue
1 stopFinnair
30h 15mLAX-BHD
£529
9/10Thu
1 stopDelta
16h 20mBHD-LAX
13/10Mon
2 stopsDelta
22h 58mLAX-BHD
£545
20/8Wed
1 stopKLM
13h 15mBHD-SFO
5/9Fri
1 stopKLM
23h 30mSFO-BHD
£545
9/10Thu
2 stopsDelta
19h 15mBHD-LAX
13/10Mon
2 stopsDelta
23h 10mLAX-BHD
£548
10/9Wed
1 stopFinnair
26h 40mBHD-LAX
17/9Wed
1 stopFinnair
31h 05mLAX-BHD
£559

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Recent one-way flight deals

20/7Sun
3 stops
42h 35mBFS-SFO
£433
20/7Sun
2 stops
30h 30mBFS-SFO
£453
8/7Tue
2 stopsBritish Airways
34h 15mBHD-LAX
£532
20/7Sun
2 stops
34h 35mBHD-SFO
£533
8/7Tue
2 stopsBritish Airways
33h 25mBHD-LAX
£534
20/7Sun
3 stops
34h 00mBHD-SFO
£548
11/10Sat
2 stopsIberia
24h 57mBHD-ONT
£837
21/7Mon
1 stopKLM
26h 20mBHD-SFO
£1,381
21/7Mon
1 stopKLM
26h 20mBHD-SFO
£1,383
24/7Thu
2 stopsAmerican Airlines
16h 58mBHD-ONT
£2,342

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Last minute flights from Northern Ireland to California

Last minute flight, train and bus deals

16/6Mon
multi-stop
23h 25mBFS-LAS
23/6Mon
multi-stop
48h 50mLAS-BFS
£971
16/6Mon
multi-stop
19h 05mBFS-LAS
23/6Mon
multi-stop
28h 00mLAS-BFS
£1,049
16/6Mon
multi-stop
18h 40mBFS-LAS
23/6Mon
multi-stop
23h 10mLAS-BFS
£1,229

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Everything you need to know for your flight to California

Cabin class types available on flights to Northern Ireland

Cabin classes available on flights to Northern Ireland. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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