The company I represent was in a crisis situation where we needed to get halfway across the country within a matter of hours. The only available commercial flight was sold out and nothing would get us there in time. After doing some research, I found Stratos Jet Charters and called Joel at around 7 in the morning. He answered right away and were at the airport two hours later. Because it was a high stress situation in a short amount of time, I called Joel and his team countless times in a two hour window; they remained extremely professional and kind. Plus, Joel was able to get us an extremely competitive price, especially considering the short notice. I highly recommend using Stratos Jet Charters and know I will definitely use them again.
When it comes to small planes, weight matters. Don't be surprised when your contact emails you for all passenger weights, and when the pilot organizes seating by weights. (You don't want the three biggest people on the right side, for instance.) Similarly, don't expect to bring two weeks of stuff for a weekend, and definitely mention if you're planning on bringing golf clubs or skis. If they don't fit, check out ShipSticks or LuggageForward, which sends your equipment beforehand for a relatively small fee.
After your initial enquiry you will be assigned a personal charter expert who will send you a selection of quotes for you to choose from. Each quote will have a clear breakdown of aircrafts and airports and reasons they have been selected for you. Should you wish to go ahead they will then book the aircraft and send you all the flight details including directions to the terminal and any other important information. They will be your first point of call for any further enquiries you may have up to the flight and, if possible, they will meet you at the terminal. From your initial quote you will be able to contact your account manager 24/7 (if on holiday you will be assigned another account manager to cover) so you can call from wherever, whenever you like.