hi there my names neil im looking to book up in nov to head to the phillies to see my gf the thing thats confusing us is the visa and my return flight we know about the 21 day visa u get wen i land but the thing is i plan on staying for 3 months i know ive gotta get extension while im there but does my flight return have to be within the initial 21 day visa or can it be dated over the 21 day i hope im making sense and someone understands what im trying to ask thanks in advance

regards neil