Pantelleria (Sicilian: Pantiddirìa), the ancient Cossyra (Arabic:قوصرة Qosra, Maltese: Qawsra, now Pantellerija, Ancient Greek Kossyra, Κοσσύρα), is an Italian island in the Strait of Sicily in the Mediterranean Sea, 100 km (62 miles) southwest of Sicily and 60 km (37 miles) east of the Tunisian coast. Tunisia is visible on clear days. Administratively Pantelleria is a comune belonging to the Sicilian province of Trapani. With an area of 83 square kilometres (32 sq mi), it is the largest volcanic satellite island of Sicily. The last eruption occurred in 1891 below sea level, and today phenomena related to volcanic activity can be observed, such as hot springs and fumaroles. The highest peak, called Montagna Grande, reaches 836 m (2,743 feet) above sea level.Wikipedia
A place in Italy, Pantelleria is an interesting place to visit, given its unique culture, history and character. A gripping city on its own right, Favignana also deserves a visit. Favignana is bestowed with interesting set of attractions for every type of traveller. Also, to reach Pantelleria, you'll have to take a flight to Favignana; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. Get in the character of the city, this city requires at least of 1 to 2 number of days of exploration.