On a Greyhound bus, whether you have to sit next to someone depends on the passenger load and whether you have utilized their seat reservation system. In 2026, Greyhound allows passengers to select their seats for a small fee during the booking process. If you want guaranteed extra space, you can actually purchase the seat next to you (a "neighbor-free" option) for an additional charge. If you do not pay for this and the bus is at or near full capacity, you will be required to sit next to another passenger. Seats are generally arranged in a 2-2 configuration. While drivers may remind passengers of their assigned seats during boarding, enforcement can be inconsistent, so you must be prepared to advocate for your reserved spot if someone else has taken it. If the bus is only partially full, passengers often spread out once the trip is underway, but during peak holiday travel or busy regional routes, expect a full bus where every seat is occupied by a traveler.