Hey,
In a 737, when do I start slowing down to approach speed.  I normally do 220KIAS until a couple of miles from the localzer then 170KIAS to the outer maker and approach speed after that. Is that right?

Regards.....Chris

Depends on traffic, time of day, altitude, runway, approach method, and weather. If there is a prop 5 miles in front of you, they are gonna slow you way down. If there is a storm headed for the airport, you may floor it to the runway and right as you capture the G/S throw out spoilers and flaps and landing gear at their maximum speeds and barely make your reference speed by the threshold.