Via SecretFlying, Los Angeles – Sydney roundtrips in August and September are available for $422. That’s certainly cheaper than it ever gets for an Australia roundtrip.
Fares are also available from San Francisco, Dallas, Seattle, and New York and to Brisbane and Melbourne not just Sydney, for a little bit more.
August and September aren’t peak season, it’s winter Down Under, but that’s still quite a mild period — I’ve made the trip to visit my family in the area during the Northern summer many times — and they’re lovely months of the year for parts of Australia like North Queensland (Daintree Rainforest and Great Barrier Reef).
The deal is available on Virgin Australia (or Delta codeshares for travel on Virgin Australia).
You won’t find this deal using an ITA Software search. If you can’t get it to come up, try this link.
Miles can be credited to Delta or Virgin America but will not earn full miles flown with either.
If you book this fare I’d wait several days to ensure that Virgin Australia doesn’t have seller’s remorse on a fare this cheap — ensure it’s being honored prior to making additional non-refundable travel arrangements around these tickets.