Often described as the "Paris of the East", Budapest is a stunning city with baroque architecture, monumental buildings, bridges and castle and the Danube river dividing the city into 2 parts - Buda & Pest.
By air: Budapest is served by Budapest Ferenc Liszt International Airport (BUD). You can either take a taxi from the airport or there are buses running between the city center and the airport every 30 minutes.
By train: The fastest and most comfortable way to travel from Vienna to Budapest is by Railjet high-speed train. The journey takes under 3 hours and the trains start from as early as 5:00 am. Insider tip: If you’re traveling with a Eurail Pass you don't need to buy a ticket and only pay a small reservation fee.
By bus: You can also take a Flixbus from Wien Hauptbahnhof station to Nepliget (Budapest). Busses are equally comfortable and take about the same time as the train, but they’re a lot cheaper, so if you’re on a tight budget, you know what to do.
We decided to take the bus as our Budapest visit was quite impromptu and the train tickets last minute were costing us a bomb.