Flying say BOS-EWR Saturday and return Monday to take advantage of the United Special fare. Book a sperate ticket EWR-BOS, fly back to BOS
Saturday, fly BOS-EWR Monday return portion of ticket 2 and then fly EWR-BOS Monday night return portion of ticket 1. This is clear back to back ticketing.
What if on ticket 2 Saturday you book say EWR-TPA and return Monday then take your EWR-BOS return is this really still back to back ticketing. say your intention is going to TPA from BOS and you are just taking advantage of the low special fares, not trying to circumvent the 2 day layover on your BOS-EWR ticket. Where do you draw the line on this.