Given a travel related situation, and given a specific question about the situation, summarize the question into a title

What's the cheapest way to get to Amherst, MA from either BDL or BOS airport? All shuttles from BDL to Amherst are around $55, which is the same price as that of Lyft. Peter Pan from Boston costs $45+5 but takes way more time. Are there any other options? Renting a car is not an option. I will be traveling alone and will not have any luggage. If flying to BDL, it is likely that I will arrive around 3 PM.
Cheapest way to get to Amherst, MA from BDL or BOS