Hey as per my idea there are 14+ flights per day, 3h 25m duration

Here I am giving you list of Dubai flights from mumbai of 2015 February month


12:45 AM → 2:40 AM SpiceJet 13 S M T W T F S BOM-DXB

1:40 AM → 3:35 AM Jet Airways 580 S M T W T F S BOM-DXB

4:15 AM → 6:05 AM Emirates 501 S M T W T F S BOM-DXB

5:05 AM → 7:05 AM flydubai 446 S M - W - F S BOM-DXB

8:35 AM → 10:30 AM IndiGo 63 S M T W T F S BOM-DXB

9:10 AM → 11:05 AM Jet Airways 542 S M T W T F S BOM-DXB

10:25 AM → 12:10 PM Emirates 505 S M T W T F S BOM-DXB

12:50 PM → 2:45 PM Jet Airways 536 S M T W T F S BOM-DXB

3:20 PM → 5:10 PM Emirates 507 S M T W T F S BOM-DXB

3:40 PM → 5:35 PM Jet Airways 538 S M T W T F S BOM-DXB

6:50 PM → 8:45 PM Jet Airways 544 S M T W T F S BOM-DXB

6:50 PM → 8:50 PM IndiGo 61 S M T W T F S BOM-DXB

7:05 PM → 8:55 PM Emirates 503 S M T W T F S BOM-DXB

7:50 PM → 9:55 PM Air India 983 S M T W T F S BOM-DXB

10:00 PM → 11:55 PM Emirates 509 S M T W T F S BOM-DXB