By Air

Travel time to Guam by air is a double digit venture.  Depending on the time of the year, you can count on 11 to 13 hours from the west coast if traveling through Tokyo or Osaka, Japan.  After a brief layover, an additional 3 and a half hours into Guam.  And that route will require a valid passport.  Since the events on 911, and travel security changes, it's highly recommended that you obtain a passport regardless of the direction you travel to Guam from.

If traveling through Honolulu, Hawaii, again from the west coast, you can expect about a 5 and a half hour trip to Honolulu then approximately a 7 to 8 hour flight into Guam.

Another option is to travel from the west coast through Hawaii and then a 9 hour flight into Tokyo and then onto Guam.  This route is very time consuming but if you enjoy flying and are banking the miles, this is a good one for you.

The most common airlines traveling to Guam from the mainland United States is currently Continental or Delta Airlines (formerly Northwest).  You can get to Guam on other airlines, ie,  JAL, ANA, KAL etc, but most of the time those routes originate in other parts of the world.

Remember, when traveling to Guam from the west coast, you will cross the international dateline and will experience a major time and date change but after getting over any jet lag, it's well worth it.