Traveling by 1AC of this Train from Mumbai to Lucknow cost more than Flight.
on 19-Jan-15 air ticket cost 3680/- but Train ticket cost 3935/- + online booking charges 35/- total cost 3970/- thus Air ticket is 290/- cheaper than Train Ticket. And you save your valuable time. Traveling time by train is 24 hours and bu air is 2:30 hours.
So time is yours and money is yours, you decide how to spend your time and money.