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$620+ Cheap flights from Irvine, CA to Belfast

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BHD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Irvine to Belfast

Cheapest flights from Irvine to Belfast
Explore the most affordable flight options available from Irvine to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Ovago deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/218:15 pmLAX - BHD
2 stops16h 35mAer Lingus
Tue 12/238:45 amBHD - LAX
1 stop15h 05mAer Lingus
Deal found 12/17$1,672
This Expedia deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/218:15 pmLAX - BHD
2 stops16h 00mMultiple Airlines
Tue 12/236:00 pmBHD - LAX
2 stops53h 16mMultiple Airlines
Deal found 12/17$1,688
This British Airways deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/279:00 pmLAX - BHD
2 stops16h 10mBritish Airways
Sat 1/37:00 amBHD - LAX
2 stops21h 25mBritish Airways
Deal found 12/16$1,873
This Ovago deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:00 pmLAX - BHD
1 stop16h 40mBritish Airways
Tue 12/237:25 pmBHD - LAX
1 stop33h 00mBritish Airways
Deal found 12/17$2,444
This American Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:15 pmLAX - BHD
1 stop17h 15mAmerican Airlines
Sat 1/36:35 amBHD - LAX
1 stop21h 50mAmerican Airlines
Deal found 12/17$2,483
This KLM deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/272:30 pmLAX - BHD
2 stops18h 20mKLM
Sat 1/36:30 amBHD - LAX
2 stops17h 55mKLM
Deal found 12/17$2,507
This Delta deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:45 pmLAX - BHD
1 stop19h 05mDelta
Fri 1/26:30 amBHD - LAX
2 stops23h 25mDelta
Deal found 12/16$2,784
This Cheapflightsfares deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2211:55 pmLAX - BHD
2 stops32h 50mBritish Airways
Sat 1/36:35 amBHD - LAX
1 stop21h 50mBritish Airways
Deal found 12/16$3,092

Find flight deals from Irvine to Belfast

Keep the following information in mind while searching for Irvine to Belfast flight deals. Data was last updated December 18, 2025.

Round-trip from

$604
(Cheapflightsfares)

Popular in

June

Cheapest in

October

Average price

$1,098
From Irvine to Belfast
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($187 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Irvine 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 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Irvine to Belfast that are best for you.

Fly from

Irvine

Fly to

Belfast

Route

Depart

Return

Price

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Fri 1/23

4:45 pm-5:15 pm

2 stops16h 30m

Belfast City

Tue 2/3

10:00 am-3:50 pm

1 stop13h 50m

$620

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 2/4

3:30 pm-2:15 pm

1 stop14h 45m

Belfast City

Sun 2/8

5:35 pm-1:30 pm

1 stop27h 55m

$624

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 2/11

3:30 pm-4:35 pm

1 stop17h 05m

Belfast City

Sun 2/15

10:40 am-6:30 pm

1 stop15h 50m

$624

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Thu 1/15

3:12 pm-6:50 pm

2 stops19h 38m

Belfast City

Thu 1/22

9:05 am-10:45 pm

2 stops21h 40m

$649

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Thu 1/8

9:00 pm-8:30 pm

1 stop15h 30m

Belfast City

Fri 1/16

6:45 am-6:25 pm

1 stop19h 40m

$719

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Thu 1/8

9:30 am-10:20 am

2 stops16h 50m

Belfast City

Fri 1/16

6:45 am-3:20 pm

1 stop16h 35m

$726

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Fri 1/30

8:15 pm-10:00 pm

2 stops17h 45m

Belfast Intl

Fri 2/6

8:05 am-6:30 pm

2 stops18h 25m

$802

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Thu 6/11

4:30 pm-9:55 am

1 stop33h 25m

Belfast Intl

Wed 6/24

6:10 am-2:10 pm

1 stop16h 00m

$822

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Sat 5/23

8:05 am-9:30 pm

3 stops29h 25m

Belfast Intl

Sat 5/30

10:25 pm-9:45 pm

3 stops31h 20m

$1,112

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Thu 1/8

8:15 pm-8:25 pm

2 stops16h 10m

Belfast Intl

Fri 1/16

5:30 pm-2:00 pm

1 stop28h 30m

$1,163

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 13 results
1
2

Best time to book a flight from Irvine to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Irvine with our price prediction graph.
Estimated round-trip 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 Irvine to Belfast

What is the cheapest month to book a flight from Irvine to Belfast?

Currently, March is the cheapest month in which you can book a flight from Irvine to Belfast (average of $586). Flying from Irvine to Belfast in June is currently the most expensive (average of $927). 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 IR9 to BFS?

Find hourly flight availability from Irvine 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 December 18, 2025.

It’s typically best to fly out from Irvine to Belfast in the morning. Doing so could potentially save you 18% on the flight price compared to flying in the evening, which is usually more expensive.

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Belfast. Reviews last updated December 18, 2025.
Read through reviews of airlines operating flights from Irvine to Belfast, such as British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,585 reviews

Food

6.4

Boarding

6.9

Entertainment

6.4

Crew

7.6

Overall

6.7

Comfort

6.7

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.
British Airways
6.7
Okay
7,585 reviews
British Airways
6.7
Okay
7,585 reviews

Food

6.4

Boarding

6.9

Entertainment

6.4

Crew

7.6

Overall

6.7

Comfort

6.7

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.

Related info for your journey

Find useful and relevant information for your journey from Irvine 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 Irvine to Belfast?

    Departing from Irvine to Belfast will take you 16h 30m. Irvine and Belfast are separated by a distance of 5128 mi.

  • Can I find deals for flights from Irvine to Belfast that include hotel bookings?

    Yes. In addition to deals on Irvine to Belfast flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Irvine to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Irvine to Belfast.

  • Can I find deals for business class flights from Irvine to Belfast?

    Yes. Cheapflights offers flight deals from Irvine 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 Irvine to Belfast?

    Currently, March is the cheapest month in which you can book a flight from Irvine to Belfast (average of $586). Flying from Irvine to Belfast in June is currently the most expensive (average of $927). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Irvine to Belfast

Discover the top airline that operate flights from Irvine to Belfast. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$599Average$840FlexibilityNo cancel feeOn-time70%

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