To get around Bellflower, it's recommended to rent a car. It costs around $40-60 per day, and it will be easier to visit all the points of interest in this itinerary. If you prefer not to rent a car, there are bike rental options available, as well as ride-sharing services like Uber and Lyft. Keep in mind that transportation costs can vary depending on how far you need to travel to go from one destination to another.
If you have more time, you can consider visiting other nearby attractions like the Aquarium of the Pacific in Long Beach or Knott's Berry Farm in Buena Park. If you have less time, you can skip the Heritage Park and Museum and Bellflower Downtown Area and replace it with a visit to Catalina Island for some water adventures.
The nearest airport to Bellflower is Long Beach Airport (LGB), which is around 6.5 miles away from the city center. Los Angeles International Airport (LAX) is also a viable option, but it's around 21 miles away from the city. Both airports offer ground transportation options to get to the city center.