\documentclass{article}
\usepackage{url}
\ifx\pdftexversion\undefined \else
   \usepackage{hyperref}
\fi

\begin{document}
Text text text text text text text text text text
\url{http://www.verylong.org/path/longlongpath/veryverylonglongpath/anevenverymuchlongerpath.html}
text text text text text text text text text text text text text text
text text text text text
\end{document}
