To establish a Jaeger speed we can use the human body as a guide.
We know that the average human walking speed ranges from 1-3 mph. The average human running speed depends on whether it's a sprint or running long distance. Sprint speed average is about 15 mph and long distance speed is 8 mph. Top level human running speeds top out near 28 mph.
Considering that a Jaeger is built to approximate the human form and movement potential and that they're 43 times taller than a human, this would mean that a Jaeger stride is 43 times longer as well. Also, properly piloted Jaegers seem to move with the same fluidity as the human body.
With these factors in play we can extrapolate a reasonable approximation of the speed potential of a Jaeger by multiplying the numbers;
Walking speed would be approx. 43-129 mph;
Jogging speed would be approx. 344 mph;
Sprinting speed would range from 645-1204 mph
Taking into consideration speed obstacles such as lack of traction, trip hazards, wind turbulence and drag, uneven terrain features such as hills and valleys, we can reasonably cut those 'potential' numbers in half to arrive at 'real-world' speeds.
Walking speed would be approx. 22-65 mph;
Jogging speed would be approx. 172 mph;
Sprinting speed would range from 323-602 mph
In summary: A Jaeger can do the highway speed limit just by walking fast, outrun most helicopters while jogging and outrun all but jet aircraft in a sprint.