5 bus providers offer schedules in Portugal that you can quickly and easily book on Wanderu. In Portugal, 94 destinations are linked with scheduled bus service that you can search and book online. If you are looking for the most frequent service to Portugal, FlixBus has the most international connections arriving in Portugal. As you will be arriving into a new country, we recommend that you check immigration requirements to see if a visa is required for your travel plans and what documentation you should have with you. Once you’ve arrived in Portugal, then one of your best bets for bus travel inside the country will be with FlixBus, which offers the largest network of bus routes and destinations in Portugal.