Travelocity: Roundtrip Flight from Washington DC to Mumbai India from $675

Notes:
These flights make 1 stop in London, both ways. The transatlantic flight is on Virgin Atlantic for a couple of hours and then change planes to Air India for the London-Mumbai portion of the trip. The same for returning.
These are economy classic fares that include seat selection, a carry-on bag and 2 free checked bags.

Travel Availability:
Departs Washington DC (IAD):
September 10-30
October 1-16
Returns:
September 17-30
October 1-26