AirHint found the following cheapest return flights from London (LON) to Sydney (SYD) in April 2026 (see full year).

Return flights

09 Apr - 23 Apr	Ryanair
07 Apr - 21 Apr	Ryanair
18 Apr - 20 Apr	Ryanair
30 Apr - 14 May	Austrian Airlines
23 Apr - 14 May	easyJet
11 Apr - 26 Apr	easyJet
12 Apr - 28 Apr	easyJet
11 Apr - 23 Apr	easyJet
25 Apr - 09 May	easyJet
21 Apr - 26 May	easyJet
07 Apr - 19 Apr	China Airlines
06 Apr - 27 Apr	China Airlines
10 Apr - 23 Apr	China Airlines
06 Apr - 19 Apr	China Airlines
28 Apr - 08 May	China Airlines
20 Apr - 18 May	China Airlines
27 Apr - 05 May	Lufthansa
23 Apr - 15 May	Malaysia Airlines
30 Apr - 15 May	Malaysia Airlines
25 Apr - 16 May	Malaysia Airlines

Also check the deals for one-way flights from London to Sydney in April.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from London to Sydney in April from $999

Return flights