Most people booking from Baldock are headed to Luton or Stansted. Both are an easy enough to drive.
Luton is the closer of the two, about 14 miles away, mostly along the A505. Give it 20 to 35 minutes, depending on traffic and the time of day. It's a route our drivers know well, whether that's an early flight out or a pickup off a late arrival.
Stansted is a bit further, roughly 20 miles, and usually takes 40 to 50 minutes. Leave a bit of extra time for the M11 and the roads around the airport itself, especially at busy times.
Book either route as far ahead as you like. We keep an eye on your flight too, so if it lands early or gets delayed, your pickup time moves with it. No standing at arrivals wondering where your driver's got to.