United Airlines and ANA have round trip airfares travelling from Los Angeles (LAX) to Guam (GUM) for $542, making 1 stop each way.
Departs Monday thru Thursday from Oct 2 thru Nov 30; and then again Jan 8 thru April 30
Returns wide and good availability
Use dates and book it on Expedia [expedia.com]
, Orbitz [orbitz.com]
or Priceline [priceline.com]
. Bundling hotel with airfare will save money.
link to recent travel deals