A taxi is the best option if you prioritize comfort and speed, though be aware that the cost can be high.
Traveling from Bangkok to Nonthaburi takes only about 15 minutes. You can take a taxi through 12Go, with fares ranging from 652 to 1700 THB. Consider the cost, especially if you're planning to save money.
Although no cheaper transport options are detailed, the taxi is the only available choice and prices can vary.
For families seeking comfort and a quick journey, the taxi offers a suitable solution, but keep the cost in mind.