Pastel paintings are beautiful and luminous, and require a little extra tender loving care when being shipped. I have shipped work all over the country without any trouble. Here's how I shipped a framed painting to NYC for inclusion in the Pastel Society of America exhibition:
It is important to be sure to have the proper shipping box. I can't praise AirFloat StrongBoxes enough. You may visit their website here. The boxes are made of cardboard that is remarkably sturdy. I have been using these boxes for years, preferring the boxes with puncture proof linings. You may reuse them a few times using commonsense. Don't continue using them when you recognize that the box's strength has been compromised by being bounced around in shipping.