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Belfast Intl

$733+ Cheap flights from Irvine, CA to Belfast Intl (BFS)

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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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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 November 3, 2025.

This Mytrip deal was found by Cheapflights users on 11/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/17:10 pmLAX - BFS
2 stops19h 40mMultiple Airlines
Sun 12/75:15 pmBFS - LAX
2 stops30h 00mMultiple Airlines
Deal found 11/2$733
This Mytrip deal was found by Cheapflights users on 11/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/18:20 amLAX - BFS
3 stops28h 45mMultiple Airlines
Sun 12/1410:05 pmBFS - LAX
2 stops23h 00mMultiple Airlines
Deal found 11/1$899

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 November 3, 2025.

Round-trip from

$733
(Mytrip)

Popular in

June

Cheapest in

October

Average price

$700
From Irvine to Belfast Intl
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($221 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 3, 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

Mon 12/1

7:45 am-1:10 pm

3 stops21h 25m

Belfast Intl

Sun 12/7

11:05 pm-4:35 pm

2 stops25h 30m

$760

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Mon 12/1

8:20 am-9:05 pm

3 stops28h 45m

Belfast Intl

Sun 12/14

10:05 pm-1:05 pm

2 stops23h 00m

$899

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

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 month to book a flight from Irvine to Belfast Intl Airport?

Currently, October is the cheapest month in which you can book a flight from Irvine to Belfast Intl Airport (average of $602). Flying from Irvine to Belfast Intl Airport 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 Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 3, 2025.

It’s typically best to fly out from Irvine to Belfast Intl Airport at noon. Doing so could potentially save you 13% on the flight price compared to flying in the evening, which is usually more expensive.

Reviews of airlines servicing Belfast Intl

Get insights into the airlines that provide service to Belfast Intl. 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 Intl. Reviews last updated November 3, 2025.
Peruse reviews from past customers who have flown with British Airways from Irvine to Belfast Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,494 reviews

Comfort

6.7

Food

6.3

Entertainment

6.4

Crew

7.6

Overall

6.7

Boarding

6.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.
British Airways
6.7
Okay
7,494 reviews
British Airways
6.7
Okay
7,494 reviews

Comfort

6.7

Food

6.3

Entertainment

6.4

Crew

7.6

Overall

6.7

Boarding

6.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.

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, October is the cheapest month in which you can book a flight from Irvine to Belfast Intl Airport (average of $602). Flying from Irvine to Belfast Intl Airport 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

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Top airline flying from Irvine to Belfast Intl

Discover the top airline 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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$645Average$905FlexibilityNo cancel feeOn-time70%

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