The city of Delhi offers easy transit from Delhi Airport to the city center by metro, bus, or taxi. Travel fares depend on the vehicle choice, and travel times vary in direct proportion. When toting luggage, a taxi is the most comfortable way to transit to the city center, at an average time of 25-50min. Taxi fares range from a fixed QR 19.85-24.82. From Delhi Airport, the cheapest and fastest way to get to the city center, mostly operating underground, is The Airport Express Metro. Running every 10 minutes, the metro takes 20min to reach the city center and costs as little as about QR 2.98 using a smart card or token, depending on the intended frequency of use. The bus system in Delhi is operated by the Delhi Transport Corporation. It is regarded as the cheapest and slowest transit, taking an average of 45min to reach the city center and costing an average of QR 0.74, determined by the length of the trip.