Tarom has several flights per week from Bucharest to Suceava, but you might want to consider flying to Iasi, the nearest city with daily connections to the capital, and then take a train to Suceava. Suceava is just 2 hours from Iasi.
To rent a car, contact Autonom Rent-a-Car (www.autonom.ro) in Suceava at Str. Nicolae Balcescu 2 (tel. 0230/52-1101) or in Iasi at Str. Stefan cel Mare 8-12 (tel. 0232/22-0504); you'll pay around 30€ ($38) per day for a cheap model with unlimited mileage.
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.