Cheap Flights to Castlereagh | Popular Routes to Castlereagh from HK$379

View HK$379 flight on Mon, 22 Jun 2026Opens in a new window

Popular airlines to Castlereagh

  • easyJet

  • British Airways

  • Aer Lingus

  • KLM

  • American Airlines

  • Virgin Atlantic

  • Ryanair

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 35% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Castlereagh

Prices were available within the past 7 days and start at HK$379 for one-way flights and HK$695 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

easyJet
Wed, 1 Jul - Thu, 16 Jul
LTN
London
BFS
Belfast
HK$695 Return, found 5 days ago
HK$695
Return
found 5 days ago
Select easyJet flight, departing Wed, 1 Jul from London to Belfast, returning Thu, 16 Jul, priced at HK$695 found 5 days ago
easyJet
Fri, 14 Aug - Sun, 16 Aug
LTN
London
BFS
Belfast
HK$704 Return, found 17 hours ago
HK$704
Return
found 17 hours ago
Select easyJet flight, departing Fri, 14 Aug from London to Belfast, returning Sun, 16 Aug, priced at HK$704 found 17 hours ago
easyJet
Wed, 1 Jul - Sat, 18 Jul
LTN
London
BFS
Belfast
HK$727 Return, found 4 days ago
HK$727
Return
found 4 days ago
Select easyJet flight, departing Wed, 1 Jul from London to Belfast, returning Sat, 18 Jul, priced at HK$727 found 4 days ago
easyJet
Wed, 1 Jul - Thu, 16 Jul
LTN
London
BHD
Belfast
HK$747 Return, found 5 days ago
HK$747
Return
found 5 days ago
Select easyJet flight, departing Wed, 1 Jul from London to Belfast, returning Thu, 16 Jul, priced at HK$747 found 5 days ago
easyJet
Wed, 1 Jul - Thu, 16 Jul
LTN
London
BFS
Belfast
HK$758 Return, found 5 days ago
HK$758
Return
found 5 days ago
Select easyJet flight, departing Wed, 1 Jul from London to Belfast, returning Thu, 16 Jul, priced at HK$758 found 5 days ago
easyJet
Wed, 1 Jul - Thu, 16 Jul
LTN
London
BHD
Belfast
HK$763 Return, found 5 days ago
HK$763
Return
found 5 days ago
Select easyJet flight, departing Wed, 1 Jul from London to Belfast, returning Thu, 16 Jul, priced at HK$763 found 5 days ago
British Airways
Tue, 29 Sept - Wed, 14 Oct
LHR
London
BHD
Belfast
HK$1,341 Return, found 6 days ago
HK$1,341
Return
found 6 days ago
Select British Airways flight, departing Tue, 29 Sept from London to Belfast, returning Wed, 14 Oct, priced at HK$1,341 found 6 days ago
China Southern Airlines
Mon, 16 Nov - Mon, 30 Nov
HKG
Hong Kong SAR
BHD
Belfast
HK$6,985 Return, found 4 hours ago
HK$6,985
Return
found 4 hours ago
Select China Southern Airlines flight, departing Mon, 16 Nov from Hong Kong SAR to Belfast, returning Mon, 30 Nov, priced at HK$6,985 found 4 hours ago
KLM
Fri, 6 Nov - Sun, 22 Nov
HKG
Hong Kong SAR
BHD
Belfast
HK$8,263 Return, found 6 days ago
HK$8,263
Return
found 6 days ago
Select KLM flight, departing Fri, 6 Nov from Hong Kong SAR to Belfast, returning Sun, 22 Nov, priced at HK$8,263 found 6 days ago
Qatar Airways
Mon, 16 Nov - Mon, 30 Nov
HKG
Hong Kong SAR
BHD
Belfast
HK$8,736 Return, found 4 hours ago
HK$8,736
Return
found 4 hours ago
Select Qatar Airways flight, departing Mon, 16 Nov from Hong Kong SAR to Belfast, returning Mon, 30 Nov, priced at HK$8,736 found 4 hours ago
Book with confidence

About Castlereagh

Expedia offers flights to Castlereagh to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to Castlereagh or destinations around the world and discover how easy it is to make your flight reservations on Expedia.

Trending flights to Castlereagh

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

China Southern Airlines
Mon, 16 Nov - Mon, 30 Nov
HKG
Hong Kong SAR
BHD
Belfast
HK$6,985 Return, found 4 hours ago
HK$6,985
Return
found 4 hours ago
Select China Southern Airlines flight, departing Mon, 16 Nov from Hong Kong SAR to Belfast, returning Mon, 30 Nov, priced at HK$6,985 found 4 hours ago

Frequently asked questions

How do I find cheap flights to Castlereagh that have flexible change policies?
At Expedia, we've been channeling our inner acrobat to get you the most flexible fares in town. Just click on "No change fee" right under the "Flexible change policies" heading to find your dream flight to Castlereagh.
How can I find cheap tickets to Castlereagh?
You'll always nab a fabulous deal with Expedia, but our "flexible dates" feature makes it that much easier. Enter your preferred travel date, then click on the flexible dates box above to see a list of prices for nearby days. HK$695 was the lowest price for a flight to Castlereagh in the last seven days.
How much is a flight to Castlereagh?
In the last seven days, return flights to Castlereagh sold for as little as HK$695 and peaked at HK$8,736. For one-way trips departing from London (LGW), the cheapest seat during this same period was only HK$379.
When is the cheapest time to fly to Castlereagh?
Jet off early on in the week to book a bargain airfare to Castlereagh. Tuesday is normally the most affordable day to depart, with Monday a close second. Saturday typically has the most expensive prices. This is because lots of people prefer to begin their vacation on a weekend.
How much is a plane ticket to Castlereagh?
Plane tickets ranged from HK$695 to HK$8,736 over the last seven days. When you're ready to book, we're ready to help you pick up the best price to Castlereagh.
What months are the cheapest to book a flight to Castlereagh?
The perfect month to book well-priced airfares to Castlereagh is February. Bear in mind that in the USA, the most expensive time to secure a ticket is during the month of December.

Book with confidence

About Castlereagh

Expedia offers flights to Castlereagh to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to Castlereagh or destinations around the world and discover how easy it is to make your flight reservations on Expedia.
About Castlereagh
*Available to Expedia members.