Investors interested in Transportation stocks should always be looking to find the best-performing companies in the group. Has United Airlines (UAL) been one of those stocks this year? A quick glance at the company's year-to-date performance in comparison to the rest of the Transportation sector should help us answer this question.United Airlines is a member of the Transportation sector. This group includes 135 individual stocks and currently holds a Zacks Sector Rank of #10. The Zacks Sector Rank considers ...