How much is a ticket from Sydney to London?

The cheapest price found today is $481.

When is it cheaper to fly?

Cheapest month is September — from $481.

Cheapest today — $481. Below is what booking services offer.

Departure	Airline	Stops	Price
Sep 2	China Eastern	1	$481	View
Sep 4	China Eastern	1	$483	View
Sep 1	China Eastern	1	$488	View
Feb 9	China Eastern	1	$493	View
Sep 3	China Eastern	1	$504	View
Sep 10	China Eastern	1	$505	View
Sep 9	China Eastern	1	$510	View
Oct 15	Etihad Airways	1	$517	View

How much is a ticket from Sydney to London?: The cheapest price found today is $481.
When is it cheaper to fly?: Cheapest month is September — from $481.

Links to booking services are affiliate links. The price stays the same for you.