National is offering $100 off any published first class fare by mentioning code PDPF17.

The fine print: Offer applies to first class fares only. Must be ticketed by 6/15/00. Travel must be completed by 8/31/00. Not valid for travel to Las Vegas as a final destination. Not valid with any other offer, previously purchased ticket or National Vacations package. Must give promo code at time of reservation.