$649 Find Cheap Flights from California to Northern Ireland

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Low seasonFebruary
High seasonAugust
Cheapest flight$649
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly and prices are also 12% lower on average.
Flight from Los Angeles to Belfast City Airport

FAQs for booking flights from California to Northern Ireland

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

    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 California to Northern Ireland.

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

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

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from California to Northern Ireland 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 California to Northern Ireland?

    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 California to Northern Ireland 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 Northern Ireland?

    Based on KAYAK data, the cheapest day to fly to Northern Ireland is Friday where round-trip tickets can be as cheap as $691. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $1,143 on average.

  • What is the cheapest time of day to fly to Northern Ireland?

    The cheapest time of day to fly to Northern Ireland is generally in the afternoon, when round-trip flights cost $681 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Northern Ireland is generally in the evening, which is peak travel time and where the average cost of a ticket is $838.

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

    The cheapest month for flights from California to Northern Ireland is October, when tickets cost $643 (return) on average. On the other hand, the most expensive months are January and December, when the average cost of round-trip tickets is $1,339 and $1,291 respectively.

  • How long is the flight to Northern Ireland?

    An average nonstop flight from California to Northern Ireland takes 19h 40m, covering a distance of 5040 miles. The shortest route is Las Vegas (LAS) to Belfast Intl Airport (BFS) with an average flight time of 13h 15m.

  • What are the most popular destinations in Northern Ireland?

    Based on KAYAK flight searches, the most popular destination is Belfast (99% of total searches to Northern Ireland). The next most popular destination is Campbeltown (1%).

Top airlines flying from California to Northern Ireland

Need help choosing which airline to fly with from California to Northern Ireland? 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
7.5Boarding
6.5Food
7.2Comfort
6.9Entertainment
8.0Crew
Airline reviews

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

8.0 ExcellentConstantine, Apr 2025LAX - LAS
Read more American Airlines reviews

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

British Airways staff are very polite and willing to help.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

We kept being told that the flight was full and that all overhead compartments were full and therefore had to check in our hand luggage. We were some of the last people to board and noticed that there was still sufficient space in the overhead compartments. We were obliged to check in hand luggage when there was space and so had to wait at luggage retrieval which took a while to then noticed damage to our luggage - not a great experience!

Worst seats I’ve ever had !!! The seats were very narrow and uncomfortable and misaligned with the seats in front of mine leading to bottom of the seat in front of mine pressing on my legs for 15.5 hours !

This was an overnight flight. There was no meal service in first class, just a simple snack basket was offered along with beverages. There should have been some type of continental breakfast prior to arrival in PHL. As an Executive Platinum American Airlines Advantage member, I received no name recognition from the first class flight attendant. When disembarking at PHL, the flight attendants were more interested in their cell phones than saying "thank you" to the passengers as they disembarked.

The flight was quick and to the point. The crew just did their job w/o excessive talking and everything was just perfect.

Awkward carry on process. Forced to check all carry on. No overhead space of worthiness. Left delayed, but made up the time. Crew was amicable.

Amazingly comfy flight - I had upgraded for a reasonable price and it was worth it. The food also was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

The crew could not have been more helpful, my meal was excellent, I slept peacefully until right before landing, and the BA lounge was a godsend. The only negative I encountered was the coffee both on the plane and in the lounge. Not to my taste but that’s a personal preference.

I don’t understand why a reputable airline like BA would delegate their London flights to AA. Makes no sense to me, as most domestic carriers do such a poor job these days. Terminal 3 at LHR is a total dump

Cancelled flight minutes before boarding. Rescheduled flight was two days later

The flight attendants were EXTREMELY personable and appreciated the service, lights going off after dinner (probably the norm, but I haven’t flown evening overnight flights in a while). Thank you!

Business class seats were very dated on my plane. Very little storage, charging ports were not easily accessible, tv screen kept flopping away. Vegetarian food was disappointing: hardly any protein and severely under-seasoned. Crew was lovely.

The food was ok, but not great. They delayed boarding in Portland and did not enforce group boarding. But the crew was excellent, went above and beyond.

The food was pathetic. There wasn't much leg room and recline space for such a long flight. No tea/ coffee for a 2-3 hour connecting flight without purchasing! Really!?

Service was very good. Because I use a cane, I was allowed to use Priority Boarding. Biggest problem was extremely limited leg room in Economy class seats. For airplane food, it was alright.

Was late but that airport/storm fault. Flight was full but comfortable. Food quite nice. Unfortunate that I had a rather miserable attendant, others were much friendlier

Book cheap flights from California to Northern Ireland

Recent round-trip flight deals

10/15Wed
1 stop
14h 35mLAX-BHD
10/23Thu
1 stop
25h 55mBHD-LAX
$649
10/15Wed
1 stopIberia
14h 35mLAX-BHD
10/23Thu
1 stopIberia
19h 00mBHD-LAX
$655
10/15Wed
2 stopsAmerican Airlines
16h 00mLAX-BHD
10/23Thu
1 stopAmerican Airlines
15h 35mBHD-LAX
$660
10/15Wed
2 stopsAmerican Airlines
17h 23mLAX-BHD
10/23Thu
1 stopAmerican Airlines
19h 30mBHD-LAX
$663
10/1Wed
1 stopBritish Airways
15h 20mSFO-BHD
10/13Mon
1 stopBritish Airways
27h 20mBHD-SFO
$668
10/1Wed
2 stopsBritish Airways
16h 58mSFO-BHD
10/13Mon
2 stopsBritish Airways
32h 50mBHD-SFO
$681
8/31Sun
1 stopKLM
12h 30mLAS-BHD
9/6Sat
1 stopKLM
33h 10mBHD-LAS
$912
10/15Wed
2 stopsKLM
15h 50mONT-BHD
10/23Thu
2 stopsKLM
17h 44mBHD-ONT
$1,013
7/23Wed
2 stopsDelta
23h 35mLAX-BHD
7/31Thu
2 stopsDelta
20h 14mBHD-LAX
$1,052
7/15Tue
1 stopDelta
23h 15mLAX-BHD
7/31Thu
1 stopDelta
16h 20mBHD-LAX
$1,132

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Recent one-way flight deals

6/13Fri
2 stopsBritish Airways
26h 11mSFO-BHD
$801
6/13Fri
1 stopBritish Airways
14h 55mSFO-BHD
$1,397
7/17Thu
1 stopBritish Airways
13h 50mLAX-BHD
$4,356
7/17Thu
2 stopsBritish Airways
18h 48mLAX-BHD
$4,360
7/17Thu
2 stopsBritish Airways
18h 48mLAX-BHD
$4,361
7/17Thu
2 stopsIberia
22h 06mONT-BHD
$8,643

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Last minute flights from California to Northern Ireland

Last minute flight, train and bus deals

5/3Sat
multi-stopAmerican Airlines
17h 56mSFO-BHD
5/10Sat
multi-stopAmerican Airlines
14h 45mBHD-SFO
$651
5/3Sat
multi-stopAmerican Airlines
16h 43mSFO-BHD
5/10Sat
multi-stopAmerican Airlines
19h 53mBHD-SFO
$661
5/3Sat
multi-stopBritish Airways
27h 31mSFO-BHD
5/10Sat
multi-stopBritish Airways
32h 16mBHD-SFO
$711
5/3Sat
multi-stopBritish Airways
26h 32mSFO-BHD
5/10Sat
multi-stopBritish Airways
26h 50mBHD-SFO
$726
5/3Sat
multi-stopBritish Airways
17h 15mSFO-BHD
5/10Sat
multi-stopBritish Airways
14h 45mBHD-SFO
$727
5/3Sat
multi-stopBritish Airways
16h 55mSFO-BHD
5/10Sat
multi-stopBritish Airways
18h 10mBHD-SFO
$728
5/3Sat
multi-stop
13h 15mLAS-BHD
5/5Mon
multi-stop
43h 26mBHD-LAS
$1,149
5/3Sat
multi-stop
25h 20mLAS-BHD
5/5Mon
multi-stop
43h 26mBHD-LAS
$1,165
5/3Sat
multi-stop
19h 45mLAS-BHD
5/5Mon
multi-stop
43h 26mBHD-LAS
$1,279
5/3Sat
multi-stop
18h 30mLAS-BHD
5/5Mon
multi-stop
23h 35mBHD-LAS
$1,369

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Everything you need to know for your flight to Northern Ireland

Cabin class types available on flights to California

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

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