New Delhi, June 2 -- A spate of good news is flying out from the Indian aviation sector. IndiGo, the leader in the sector, just turned in its best-ever fourth quarter. There's a new airport in Mumbai about to commence operations, giving India's commercial capital a much-needed capacity boost. Several mid-level airports are stringing together above-industry growth in traffic.

The international segment has crossed a key historical level that augurs well for future growth. With fuel prices also tumbling, airlines are in decent shape going into the lean season. Here are five takeaways from the latest data coming out of the aviation sector.

Airports: Mumbai relief

On 28 May, IndiGo said it would kick off flights at the second airport in Mum...