public class MemberPaymentFinishController2 {

public Flow.Interview.Manual_Membership_Payment theFlow {get; set;}

public String getFinishURL() {
     String FinishURL;
     if (theFlow==null) return '';
     else return theFlow.varOppID;
}

public PageReference getFinishPage(){
    PageReference p = new PageReference('/' +  getFinishURL());
    return p;
}
}

<apex:page Controller="MemberPaymentFinishController2" >
    <flow:interview name="Manual_Membership_Payment" finishlocation="{!FinishPage}" />
</apex:page>

public class quickCreateContactController {

    public String myNewId { get; set; } //not needed, forgot to remove
    public Flow.Interview.Quick_Create_Contact quickCreateFlow { get; set; }

public String getFinishURL() {
        String FinishURL;
        if (quickCreateFlow != null) {
          FinishURL = quickCreateFlow.vaNewCreatedContactId;
          return FinishURL;
        }
        else return 'home/home.jsp';
        }

   public PageReference getFinishPage(){
      PageReference p = new PageReference('/' + getFinishURL());
      return p;
      }
}

<apex:page controller="quickCreateContactController">
    <div id="flow">
        <flow:interview name="Quick_Create_Contact" interview="{!quickCreateFlow}" finishLocation="{!FinishPage}">
    </flow:interview>
    </div>
</apex:page>

quoteFlow.varNewQuoteId