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$649+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BHD
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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Cheap flight deals from Irvine to Belfast

Keep the following information in mind while searching for Irvine to Belfast flight deals. Data was last updated April 29, 2025.

Round-trip from

$649
(Connections by easyJet)

Popular in

June

Cheapest in

November

Average price

$817
From Irvine to Belfast
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find 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 April 29, 2025.

This Connections by easyJet deal was found by Cheapflights users on 4/29. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/154:30 pmLAX - BHD
1 stop14h 35mMultiple Airlines
Thu 10/238:15 pmBHD - LAX
1 stop25h 55mMultiple Airlines
Deal found 4/29$649
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/158:05 pmLAX - BHD
1 stop14h 35mIberia
Thu 10/236:35 amBHD - LAX
1 stop19h 00mIberia
Deal found 4/29$655
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 10/151:30 pmLAX - BHD
2 stops16h 00mAmerican Airlines
Thu 10/2312:40 pmBHD - LAX
1 stop15h 35mAmerican Airlines
Deal found 4/29$660
This oojo deal was found by Cheapflights users on 4/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1610:38 amLAX - BHD
2 stops16h 32mBritish Airways
Thu 10/2312:40 pmBHD - LAX
2 stops18h 40mBritish Airways
Deal found 4/29$760
This Trip.com deal was found by Cheapflights users on 4/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/124:30 pmLAX - BFS
1 stop20h 05mMultiple Airlines
Mon 6/166:10 amBFS - LAX
1 stop15h 50mMultiple Airlines
Deal found 4/29$935
This Delta deal was found by Cheapflights users on 4/28. 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.
Wed 7/239:20 amLAX - BHD
2 stops23h 35mDelta
Thu 7/316:30 amBHD - LAX
2 stops20h 14mDelta
Deal found 4/28$1,052
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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.
Thu 7/311:30 pmLAX - BHD
1 stop13h 40mFinnair
Wed 8/278:15 pmBHD - LAX
2 stops28h 50mFinnair
Deal found 4/29$1,810

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 April 29, 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

Wed 10/15

4:30 pm-3:05 pm

1 stop14h 35m

Belfast City

Thu 10/23

8:15 pm-2:10 pm

1 stop25h 55m

$649

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 10/15

8:05 pm-6:40 pm

1 stop14h 35m

Belfast City

Thu 10/23

6:35 am-5:35 pm

1 stop19h 00m

$655

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 10/15

1:30 pm-1:30 pm

2 stops16h 00m

Belfast City

Thu 10/23

12:40 pm-8:15 pm

1 stop15h 35m

$660

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Thu 10/16

10:38 am-11:10 am

2 stops16h 32m

Belfast City

Thu 10/23

12:40 pm-11:20 pm

2 stops18h 40m

$760

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Thu 6/12

4:30 pm-8:35 pm

1 stop20h 05m

Belfast Intl

Mon 6/16

6:10 am-2:00 pm

1 stop15h 50m

$935

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Wed 7/23

9:20 am-4:55 pm

2 stops23h 35m

Belfast City

Thu 7/31

6:30 am-6:44 pm

2 stops20h 14m

$1,052

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Thu 7/31

1:30 pm-11:10 am

1 stop13h 40m

Belfast City

Wed 8/27

8:15 pm-5:05 pm

2 stops28h 50m

$1,810

Los AngelesBelfast

LAX - BHD

LAXBHD

Los Angeles

Thu 7/17

9:30 pm-7:20 pm

1 stop13h 50m

$4,356

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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, February is the cheapest month in which you can book a flight from Irvine to Belfast (average of $657). Flying from Irvine to Belfast in June is currently the most expensive (average of $1,189). 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 April 29, 2025.

When flying from Irvine to Belfast, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Belfast by month

Plan your trip to Belfast by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Belfast ranges from 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Belfast when rainfall is around 2.0 in.

Temperature in Belfast by month

Plan your trip to Belfast by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Belfast, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

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 April 29, 2025.
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,275 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Iberia
7.0
Good
2,698 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
6,835 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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, February is the cheapest month in which you can book a flight from Irvine to Belfast (average of $657). Flying from Irvine to Belfast in June is currently the most expensive (average of $1,189). 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 2 airlines flying from Irvine to Belfast

Discover the top 2 airlines 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$599Average$956FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$703Average$934FlexibilityNo cancel feeOn-time71%

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