The are 2 different ways across 2 unique modes of transportation to help you travel from BBX to Cedar Park. The fastest way out of Ambler towards 52nd is by public transit, as it is the quickest to the Cedar Park area. This doesn't necessarily take into consideration traffic or weather - so these may impact some of your decision making. It's common to find tickets for as low as $4. SEPTA operates from BBX to Cedar Park, so you book your trip with them! Take public transit from BBX to Cedar Park, it's your best chance!
The earlier you can book your trip to Cedar Park, the better. There is usually no need to book these sort of trips from BBX to Cedar Park in advance. Rideshares should be available on demand all hours of the day. Public transportation prices do not fluctuate like flights. Instead, they're either flat rate or priced by distance traveled. If possible, you can book your tickets via an app or alternatively at the station upon arrival. Since public transportation is available, you might be able to take this mode instead. This should help remediate any issues related to traffic and will be cheaper. Shuttle service may be available as well. If you're traveling with a large group, you should probably take a shuttle as it will reduce the price per person. With this option, you'll want to book as soon as possible to allow the shuttle service enough time to coordinate your pickup and dropoff.