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$1,684+ Cheap flights to Belfast Intl

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
— BFS
21 Jan — 28 Jan1
1 adult
1 adult, Economy, 0 bags

Flights to Belfast Intl in 2025

Enter your travel dates to find the best prices.

Cheapest flights to Belfast Intl Airport
Explore the most affordable flight options available to Belfast Intl Airport. Find the lowest fares based on data from user searches, with prices last updated on 22 December 2025.

Sat 20/1221:00SYD - BFS
3 stops35h 40mMultiple Airlines
Sun 28/1214:45BFS - SYD
3 stops35h 50mMultiple Airlines
Deal found 19/12$4,348

Find flight deals to Belfast Intl Airport

Find the latest flights to Belfast Intl in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 22 December 2025.

Return from

$1,684

Popular in

July

Cheapest in

October

Average price

$2,655
4/2-11/2
  • 4/2-11/2
  • 6 total stops
  • 78h 45m total
  • Sydney to Belfast
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($509 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($113 potential savings vs. average return price).
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Average for return flights in December 2025
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Cheapflights Fare Finder

 
Locate flights to Belfast Intl that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 22 December 2025.
Use the filters below to find and compare flights to Belfast Intl Airport that are best for you.

Fly from

Sydney

Route

Depart

Return

Price

SydneyBelfast

SYD - BFS

SYDBFS

Sydney Kingsford Smith

Wed 4/2

20:05-22:50

3 stops37h 45m

Belfast Intl

Wed 11/2

14:50-18:50

3 stops41h 00m

$1,684

Flights are sorted by cheapest return flights first.

Deals found on 21/12

Best time to book a flight to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl with our price prediction graph.
Estimated return 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 to Belfast Intl Airport

What are the cheapest airlines that fly to Belfast Intl?

The cheapest airline flying from Sydney to Belfast Intl is British Airways.

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 22 December 2025.
Read through reviews of airlines serving the United Kingdom, 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
7,602 reviews
Check prices

Boarding

6.9

Overall

6.7

Comfort

6.7

Crew

7.6

Entertainment

6.4

Food

6.4

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
7,602 reviews
British Airways
6.7
Okay
7,602 reviews
Check prices

Boarding

6.9

Overall

6.7

Comfort

6.7

Crew

7.6

Entertainment

6.4

Food

6.4

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.

FAQs about flying to Belfast Intl

  • Can I find cheaper flights to Belfast Intl if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Belfast Intl on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Belfast Intl?

    Based on reviews from Cheapflights users, British Airways is rated the highest out of the airlines that fly to Belfast Intl.

  • Where does the fastest flight to Belfast Intl depart from?

    For those looking to save time traveling to Belfast Intl, Sydney Kingsford Smith offers the quickest one-way flight (29 hours 25 minutes).

  • Does Belfast Intl have car hire?

    Yes. Those touching down at Belfast Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Belfast Intl?

    Yes. Belfast Intl has hotels nearby for those requiring accommodations. Maldron Hotel Belfast Airport is the closest property to Belfast Intl (0.0 km away from Belfast Intl).

See more FAQs

Travelling to a place near Belfast Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Ballymena

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Users can book flights with no change fees policies with our dedicated filters. Book flights to Belfast Intl flexibly with Cheapflights today.

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