Cheapest time to fly out of Melbourne, Aus is approx. 9:30am, and you should arrive (same day because of time difference) at LAX by 7:15am with a direct flight.
Likely a red eye fight, which is a flight in the middle of the night.
You can look up specific prices at kayak.com
Dubai, London, Sydney, Los Angeles, and Singapore.
There are no direct flights. Your best bet is Sydney-San Francisco or Sydney-Los Angeles, then take another flight to Cancun, Mexico.
Avoid any holiday, avoid June, July and August, never fly close to spring break, seek a red eye special.
The cheapest time to fly to Phoenix from Delaware is to buy your tickets on Wednesday. It is cheapest to find a flight Tuesday thru Thursday and stay away from the weekend.
April
in may
August
Sydney (SYD) to Los Angeles, CA (LAX) Shortest Flight Duration: 13 hours 20 mins
i have been searching my self and found that march is the cheapest.
The cheapest time of the year to fly to El salvador is from February to March and then again in May, and then from August to October.
Mildura to Sydney: about one hour flying time. Sydney to Phuket: about 8 hours.
winter