Lux Express has relaunched regular journeys between Estonia, Latvia and Lithuania, while Ecolines will start operating later this week.
Tickets on Lux Express from Vilnius to Riga and Tallinn are already available, while journeys with Ecolines to the Latvian capital can be booked starting May 29.
Safety requirements vary by country, according to Estonian public broadcaster ERR News. In Estonia and Latvia, it is sufficient for the first row on a bus to be roped off to passengers. In Lithuania, however, passengers are required to be spaced out chessboard-style.
The three Baltic countries have established a so-called travel bubble, allowing free movement for the citizens and residents of Estonia, Latvia and Lithuania.