Top 5: These Are United Airlines’ Longest Domestic Narrowbody Routes

United Airlines flies to more than 350 destinations around the world, a significant proportion of which are in the US. Some of the carrier's longest domestic routes, such as Washington (IAD) to Honolulu (HNL), are operated by widebody Boeing 767 and 777 aircraft, but of those operated by the airline's narrowbody fleet, which is the longest?