All dark tunnels usually have a sliver of light, peeking in at unexpected junctures. It was when the first wave of the pandemic began to ebb that the IndiGo top brass noticed something: Hitherto sleepy smaller towns and cities had suddenly woken up and were flying in and out of the metros in a manner never witnessed before. Patna, Ranchi, Darbhanga, Allahabad, Gorakhpur, Dibrugarh, Guwahati… name it and many first-time fliers were boarding their aircraft. Even as they watched, metro-to-metro, and especially Mumbai corporate traffic numbers, collapsed — Mumbai airport was overtaken by Bengaluru for the first time ever in