Flixbus is a European bus operator that offers intercity and bus travel in over 38 countries. Known for their easy-to-spot lime green buses and for offering affordable transportation between cities in Europe and the Americas, Flixbus is a good option for those looking for an affordable, reliable bus company. In their buses, you'll find free WiFi, bathrooms, and power outlets. You can also pay extra to choose your seat and get extra legroom, or even buy a snack or drink onboard directly from the driver. You can reschedule your ticket for a small fee, which varies from $1 to $5, depending on how close you are to the departure date.

Wanda Coach is one of the main Chinatown bus carriers in the US, connecting about 75 cities around the country with inexpensive tickets and comfortable bus rides. Wanda Coach buses travel between Chinatown neighborhoods with direct buses that are affordable, safe and have convenient pick-up and drop-off locations. If you travel with Wanda Coach, you can reschedule your tickets for a $10 fee up to 2 hours before travel time, and their buses have free WiFi, power outlets and bathrooms. 

Greyhound Lines offers the most comprehensive intercity bus services in the United States. They operate a modern, environmentally friendly fleet that serves more than 2400 destinations and carries nearly 16 million passengers annually. When traveling with them, you can expect free WiFi, onboard entertainment, bathrooms, power outlets and decent legroom. One of the great perks of Greyhound is that they connect big cities and smaller towns in the US, where you usually can't get to by train or plane. If you're looking for safe and affordable transportation, Greyhound is a great choice.