Yes, you can wear leggings on United (but airline can police your clothing).

United Airlines get over yourself – there's nothing classy about flying any more, The Independent

Here's the Reason a Group of Girls Wearing Leggings Weren't Allowed to Board a United Airlines Flight

United Airlines: leggings ban 'not sexist' even though it affects women more, US news

Why The Outrage Over United Shouldn't Have Legs

America Vs. Leggings: A Brief History

Outrage, Explanations After United Turns Away Girls From Flight For Wearing Leggings : The Two-Way : NPR

United Airlines: leggings ban 'not sexist' even though it affects women more, US news

TGIF, amiright? As in, sending up thanks for our FRIDAY PONTE PKT LEGGING. When you want to wear leggings every day of the week, this is your answer.

FRIDAY PONTE POCKET LEGGING

BDB: Cars vs. buildings in Titusville, United Airlines vs. leggings and SpaceX vs. history

Can You Wear Leggings On An Airplane In Nc International Society of Precision Agriculture

I'm an air steward and here's why you should NEVER wear flip flops or Crocs on a plane