Shuttle from Vienna to Budapest

CK Shuttle will get you from Prague to CK then from CK to Vienna. But not from Vienna to Budapest.
http://www.ckshuttle.cz/bus-cesky-krumlov-transfer/

We took the train from Vienna to Budapest - about 2 hours- if you purchase tickets online in advance it was something like 22 Euros.
Look for "SparSchiene" tix on OBB website.

I don't remember any shuttles from Vienna to Budapest. I also just took the train, it's fast easy and cheap - which is probably why there aren't a lot of shuttles.

I plan to take the train Budapest -> Vienna. Tickets 29 euro each for direct RailJet. Per Rick's Budapest book, Orangeways bus is 10-17 euros per person.

VIENNA to Budapest tickets cost 19 Euro, not 29 Euro.

I took the train from Vienna to Budapest, it's 3 hours and very comfortable and convenient--easy trip to the Hauptbahnhof on the Ubahn or by taxi, then a 10 minute taxi ride from Keleti to most Budapest hotels on the Pest side. You can take the metro as well.

Per Emily 's correct comment -- tickets CAN cost €19 IF you book them far enough ahead. €29 is what I actually paid because I waited too long. (2 months before travel date.) Be warned!

Thanks for the feedback! I checked the Rail Europe website and the rate for 1-way Vienna to Budapest is $60, so prices must have gone up. It only allows you to book at most 90 days in advance.

That's because you are still booking through a third party. You need to book through the Austrian rail company for decent discounts. And get nothing better than 2nd class as for a 2.5 hour trip there isn't any significant difference between 1st and 2nd.

Don't use Rail Europe, use the Austria national rail site: https://www.oebb.at/en/

Thank you all for the comments!