In 2026, the BMTA public bus system remains the absolute cheapest way to navigate Bangkok, with non-air-conditioned "red buses" charging as little as 8 to 10 THB ($0.25) per journey regardless of distance. For those near the water, the Chao Phraya Express Boat (Orange Flag) is a highly affordable alternative at roughly 16 THB, offering a scenic route that avoids the city's notorious traffic. While the BTS Skytrain and MRT Metro are more comfortable and efficient, their fares are higher, typically ranging from 17 to 60 THB. For point-to-point travel, the Bolt app has emerged in 2026 as the most budget-friendly rideshare option, often undercutting traditional metered taxis and Grab. For a truly local (and often faster) experience, "Win" motorcycle taxis are cheap for short distances, though they require a bit of nerves to navigate the busy Thai intersections.