Petrified Forest National Park is 117 miles east of Flagstaff and 180 miles north of Phoenix. The north entrance is 25 miles east of Holbrook on I-40; the south entrance is 20 miles east of Holbrook on U.S. 180. From Flagstaff, simply take I-40 east.
The Nearest Airport -- Flagstaff's Pulliam Airport (tel. 928/556-1234; www.flagstaff.az.gov, link under "Services") has daily air service between Flagstaff and Phoenix from US Airways, and has rental cars from Alamo, Avis, Budget, Enterprise, Hertz, and National.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.