This is a straightforward deal on a long-haul route where Premium Economy makes a real difference. The LAX-SYD flight runs around 15 hours, and the extra legroom, better meal service, and larger seat pitch are worth considering, especially if you're traveling with family.
The going rate for Premium Economy awards on this route typically sits around 80,000 miles through United MileagePlus, so 70,000 miles represents a modest but meaningful savings of roughly 10,000 miles. Availability is showing plenty of seats on April 23, 2026, which gives you flexibility if you're coordinating schedules with others.
One practical note: April falls during autumn in Australia, which means pleasant weather in Sydney and fewer crowds than the summer holiday season. It's a good shoulder-season window if your travel dates are flexible.
How to book
Search and book directly through United's award search tool at united.com. You'll need a MileagePlus account with at least 70,000 miles available.