Instructions
<head>
...
<link rel="stylesheet" type="text/css" href="your_website_domain/css_root/flaticon.css">
...
</head>
3Use the icon class on "display: inline" elements:
Use example: <i class="flaticon-airplane49"></i> or <span class="flaticon-airplane49"></span>
Under CC: Freepik, Kiranshastry, Pixel perfect
<i class="flaticon-train"></i>
<i class="flaticon-underground"></i>
<i class="flaticon-train-1"></i>
<i class="flaticon-train-tracks"></i>