i'll give you the 5:15 for it...but i'm guessing they existed before for cities that only had 1-2x daily service where you couldn't have enough rest to come in night prior and take the first flight out.....i wasn't here before 117 but i'm guessing they didnt exist in cities like RDU where they do now because the company uses it as a rest tool--required by 117 where before they didnt have a choice.