What is the cruising speed of a 737-300 aircraft?

Question

I have flown on these small planes several times and they seem to be very quick!

Thanks

Answer 1

I believe Mach .72, or 476 knots (547 MPH).  

Depends on the winds aloft too.

Answer 2

It has a max Mach number (Mmo) of 0.82

That's 82% of the local speed of sound.  At a cruising altitude of ~37,000' the temperature will likely be -56C, and this would equate to about 470 knots or 540mph

Actual cruising speed may approach this at time, but most likely they will fly slightly slower for better fuel economy, or traffic conflicts.

Answer 3

480 to 550mph