Current flight trends
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And mind it varanasi sector flight service always nearby 3K and 3.5K on an avg
Lowest one 2.6K by vistara only when u book 1-2 months advance
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Time...
more... taken by Flight is 1 hour 20 min -30 min
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But total journey time taken by flights are around all things is near about 3.5-4 hours