Is the freestream dynamic pressure higher during cruise or during landing/takeoff?
Here is what I am getting:

Static pressure:
Sea level: 101300 Pa
30,000 feet: 30100 Pa

Mach:
Sea level1 (150 kt): 0.22
Cruise2: 0.85

Ratio of specific heats: 1.4

Using the equation:
Landing: $3432.044 Pa = 73.68 lbf/ft^2$
Cruise: $15223.075 Pa = 317.94 lbf/ft^2$

So the high Mach in cruise more than compensates for the lower static pressure. This calculator agrees.

1Landing speeds for large jets are generally between 120-150 knots (Mach 0.18-0.22). Smaller planes around 60 knots (Mach 0.091). You can convert to Mach by hand or using a calculator like here.

2Cruise speeds are generally between 240-280 kias (knots indicated airspeed) for large jets, which translates to around 450-500 knots ground speed and Mach 0.75-0.85 (depending on altitude and conditions).