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Belfast Intl

$370+ Cheap flights from Irvine, CA to Belfast Intl (BFS)

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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
Aug 7 — Aug 141
Thu 8/7
Thu 8/14
1 adult, Economy
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Cheap flight deals from Irvine to Belfast Intl

Keep the following information in mind while searching for Irvine to Belfast Intl flight deals. Data was last updated August 2, 2025.

Round-trip from

$543
(Norse)

Popular in

June

Cheapest in

September

Average price

$703
From Irvine to Belfast Intl
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($230 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
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Find flight deals from Irvine to Belfast Intl

Cheapest flights from Irvine to Belfast Intl
Explore the most affordable flight options available from Irvine to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2025.

This Norse deal was found by Cheapflights users on 7/31. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/174:30 pmLAX - BFS
1 stop31h 10mMultiple Airlines
Tue 9/28:55 pmBFS - LAX
1 stop25h 15mMultiple Airlines
Deal found 7/31$543

Cheapflights Fare Finder

 
Customize your flight search to find flights from Irvine to Belfast Intl 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 August 2, 2025.
Use the filters below to find and compare flights from Irvine to Belfast Intl Airport that are best for you.

Fly from

Irvine

Fly to

Belfast Intl

Route

Depart

Return

Price

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Sun 8/17

4:30 pm-7:40 am

1 stop31h 10m

Belfast Intl

Tue 9/2

8:55 pm-2:10 pm

1 stop25h 15m

$543

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Fri 11/21

7:00 am-10:20 pm

3 stops31h 20m

$370

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Best time to book a flight from Irvine to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl 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 Intl Airport

What is the cheapest time of day to fly from IR9 to BFS?

Find hourly flight availability from Irvine to Belfast Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 2, 2025.

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

How much does it cost to fly round-trip from Irvine to Belfast Intl Airport?

Related info for your journey

Find useful and relevant information for your journey from Irvine to Belfast Intl. 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 Intl that include hotel bookings?

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Irvine to Belfast Intl Airport (average of $657). Flying from Irvine to Belfast Intl Airport 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

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Top 2 airlines flying from Irvine to Belfast Intl

Discover the top 2 airlines that operate flights from Irvine to Belfast Intl. 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 August 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$645Average$849FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$703Average$973FlexibilityNo cancel feeOn-time71%

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