HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Belfast Intl

$737+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BFS
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Irvine to Belfast Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 16, 2025.

Round-trip from

$737
(Trip.com)

Popular in

June

Cheapest in

November

Average price

$923
From Irvine to Belfast Intl
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($216 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 16, 2025.

This Trip.com deal was found by Cheapflights users on 9/15. 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.
Tue 10/218:05 pmLAX - BFS
1 stop19h 05mMultiple Airlines
Tue 10/286:00 amBFS - LAX
1 stop20h 30mMultiple Airlines
Deal found 9/15$737
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Thu 10/308:10 pmLAX - BFS
2 stops19h 10mMultiple Airlines
Thu 11/62:25 pmBFS - LAX
2 stops34h 10mMultiple Airlines
Deal found 9/15$825
This Mytrip deal was found by Cheapflights users on 9/14. 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.
Fri 11/217:00 amLAX - BFS
3 stops31h 00mMultiple Airlines
Sun 11/3010:45 pmBFS - LAX
2 stops27h 45mMultiple Airlines
Deal found 9/14$842
This Mytrip deal was found by Cheapflights users on 9/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/312:45 pmLAX - BFS
2 stops17h 45mMultiple Airlines
Fri 11/77:50 amBFS - LAX
3 stops39h 10mMultiple Airlines
Deal found 9/16$1,012
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/187:30 pmLAX - BFS
2 stops18h 50mMultiple Airlines
Fri 12/265:30 pmBFS - LAX
1 stop28h 30mMultiple Airlines
Deal found 9/15$1,576

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 September 16, 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

Tue 10/21

8:05 pm-11:10 pm

1 stop19h 05m

Belfast Intl

Tue 10/28

6:00 am-7:30 pm

1 stop20h 30m

$737

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Thu 10/30

8:10 pm-10:20 pm

2 stops19h 10m

Belfast Intl

Thu 11/6

2:25 pm-4:35 pm

2 stops34h 10m

$825

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Fri 11/21

7:00 am-10:00 pm

3 stops31h 00m

Belfast Intl

Sun 11/30

10:45 pm-6:30 pm

2 stops27h 45m

$842

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Fri 10/31

2:45 pm-3:30 pm

2 stops17h 45m

Belfast Intl

Fri 11/7

7:50 am-3:00 pm

3 stops39h 10m

$1,012

Los AngelesBelfast

LAX - BFS

LAXBFS

Los Angeles

Fri 1/23

3:00 pm-2:40 pm

2 stops39h 40m

Belfast Intl

Tue 2/3

6:25 am-6:30 pm

2 stops44h 05m

$1,095

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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 September 16, 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.

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 September 16, 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
7,363 reviews

Comfort

6.7

Overall

6.7

Entertainment

6.4

Food

6.3

Crew

7.6

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
7,363 reviews
British Airways
6.7
Okay
7,363 reviews

Comfort

6.7

Overall

6.7

Entertainment

6.4

Food

6.3

Crew

7.6

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, 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

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 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$645Average$866FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.