>>3515069 (previous)
727's (about 120 passengers, no more than 150) not 747's (400 or so passengers). 727 is a very old plane, but fun to fly, could climb much faster than most commercial jets. Ex USAF fighter pilots converted to commercial passenger pilots liked it.
Too bad we don't use them any more in the USA.
Mexico has a long border with Guatemala and the hikers could conceivably come up thru Belize as well. But I doubt they'll bother now.