Belgrade to Kotor bus with Blue Line

Lasta (Saobraćajno preduzeće Lasta a.d. Beograd) is a Serbian bus company headquartered in Belgrade, established in 1947. It is a major road passenger transport company and one of the largest bus operators in Southeastern Europe, with a fleet of around 1,000 buses. Lasta operates an extensive network of routes, including city, suburban, intercity, and international lines across Serbia and Europe, as part of the pan-European Eurolines network. Beyond regular passenger transport, Lasta also provides charter and contract-based transport services, as well as tourism services.

Fudeks is a bus company based in Belgrade, Serbia, established in 1989. It is recognized as one of Serbia's leading private bus companies, offering both international and domestic road transport services. Fudeks operates regular routes to five countries, including Serbia, Montenegro, North Macedonia, Italy, and Austria, with popular destinations such as Belgrade, Skopje, and Vienna. The company prides itself on its fleet of high tourist class buses, generally not older than 10 years, which are air-conditioned and equipped with TV, video, audio, toilets, and refrigerators. While most newer vehicles offer Wi-Fi, some older ones may not. Fudeks also provides bus rentals and intercity bus services.

"City Lines" can refer to several different bus companies. One prominent example is Citylines, a leading Bulgarian bus company headquartered in Sofia. It operates an extensive network of 44 routes, connecting 22 cities across Bulgaria and serving 9 European nations with an average of 19 trips daily. Citylines coaches offer amenities such as air conditioning, onboard restrooms, and Wi-Fi connectivity. Another is Rochester City Lines, a family-owned and operated charter bus company in Minnesota, United States, providing services for college, corporate, event, religious, school, and workforce transportation. They offer a fleet including motorcoaches, minibuses, and executive vans. Historically, National City Lines, Inc. (NCL) was a significant public transportation holding company in the United States, founded in 1920. NCL acquired numerous local transit systems, often converting streetcar lines to bus operations, a practice sometimes referred to as "bustitution." Additionally, "City Line" is also the name of a bus rapid transit (BRT) line in Spokane, Washington, operated by the Spokane Transit Authority. This 6-mile route, which opened in 2023, utilizes modern, zero-emission battery-electric buses and connects key areas including downtown Spokane and the University District.

Niš Ekspres is a prominent bus company based in Niš, Serbia, established in 1951. It is recognized as the largest and most frequently used public intercity transportation provider from Niš, offering urban, intercity, and international services. The company operates over 336 daily departures to destinations within Serbia, Montenegro, North Macedonia, and other neighboring countries. Popular domestic routes include connections between major cities like Subotica, Novi Sad, Zaječar, Niš, Pirot, Bela Palanka, and Belgrade. Niš Ekspres also provides bus rentals, repair services, and organized tours. Onboard amenities often include air conditioning, and on select routes, Wi-Fi and charging ports are available.