This is a list of Calgary Transit bus routes and routes of Calgary Region transit authorities that serve destinations within Calgary's city limits.

Standard Bus Routes

Express Buses

Express routes, are peak-hour services that run in one direction in the morning and in the reverse direction in the afternoon. Historically, express bus stops are denoted with a red sign, but the use has been abandoned since 2000 in favor of a unified scheme.

BRT and MAX

Calgary Transit's BRT routes has very few features of a modern bus rapid transit system, with limited stop service and signal priority being implemented (originally, the use of articulated buses was also a feature, but the use has spread to some high-volume local express routes). BRT in Calgary is meant to be a placeholder for soon-to-be-constructed LRT routes. BRT routes stop only at designated stops with red shelters. Service from Calgary International Airport on Route 300 uses 2013-2014 New Flyers fitted with luggage racks at the front of the bus. On Nov 19, 2018, Calgary Transit introduced 3 new MAX routes. MAX has shelters with heat, light, and doors. A fourth MAX route was introduced on December 23, 2019. On September 5th, 2023, the 305 was decommissioned from service during the 2023 Fall service change.

School Service

These routes, meant for high school students, service various schools en route on school days only. School Service is not a chartered service, and is available for travel by any fare-paid passenger. Services stop at all Calgary Transit bus stops along the intended service area, beyond which service continues nonstop to the school.