Is there a surface of a commercial jet exposed to air flow at speed near Mach 1?
Of course! If you check the wikipedia page the Critical Mach Number of an aircraft is the lowest Mach number at which the airflow over some point of the aircraft reaches the speed of sound, but does not exceed it.
The Drag Divergence Mach Number is usually bigger than the Critical Mach Number, it means that at that speed there are big surfaces exposes to speed of air larger than 1. 

It can happen because the figure of an airplane is shaped in order to avoid shock waves with flow and to postpone the maximum as possible the Drag divergence Mach number (in order to have a greater cruise speed). 

Where? 
On the upper part of the wings, where the flow is accelerated in order to produce lift.

Clarification about engines (thanks to the help of one of the comments):

The flow from a jet engine has a speed about double of the cruise speed of the airplane. Anyway the outflow from an airliner jet engine is much hotter than the surrounding air, so the speed of sound in this gas stream is much higher; its Mach number is still subsonic.