Yes, scroll down to Extension Pursuant to Regulation 1.6081-5(a) and enter a 1 or 2, as appropriate. I did not try, but I believe the extension can be filed before 6/15 after checking the box.

By the way, if I file a return now for for Taxpayers who are out of the country, how would the IRS know the deadline is 6/15? I can print a message on top of form 1040, but the IRS computer would not be able to read it.