If you are planning a trip to the capitals of Estonia, Latvia, and Lithuania, consider seeing the Baltics via Simple or Lux Express. Lux Express, the upscale big sister of Simple Express, offers internet access and hot drinks aboard with spacious seating and other amenities. Simple Express is the less costly of the two coach services, though both offer reasonable pricing depending upon your needs. Coaches leave from the main bus stations of the three capital cities regularly.
Old Town Riga photo credit: Kerry Kubilius, licensed to About.com