Eurolines is a brand of intercity bus service owned by an international non-profit organisation formed under Belgian law. While several bus operators have used the Eurolines branding in the past, the only operator that still uses the branding is UAB Kautra, which operates service between Lithuania and Estonia, Latvia, Ukraine, Belarus, and Poland.

Eurolines was founded in 1985. Its forerunner was the Europabus brand network created by the Union des Services Routiers des Chemins de Fer Européens (URF), a consortium of 11 European national railway companies, in 1951.

In 2010, Lux Express left the Eurolines network.

In 2017, the Eurolines routes to/from Romania were integrated into FlixBus.

In January 2018, National Express Coaches withdrew from the Eurolines network, instead partnering with Ouibus.

In April 2019, the Eurolines operating businesses in France, The Netherlands, Belgium, Czech Republic and Spain, all of which were formerly owned by Veolia Transport and later Transdev, were acquired by Flixbus.

In July 2020, Eurolines operators in France were placed into compulsory liquidation by a French court.