Usti has a special way of getting around: The cable car that leads from the city centre up to the viewing point and hotel Vetruse. The valley station is at the upper floor of the Forum shopping mall (U Kostela street) next to the church of the Assumption of Virgin Mary.
The cable car was opened in December 2010. The ride takes 2 minutes, departures every 15 minutes from 8 - 22 h in summer, 9 - 20 h in winter. The fare is 18 Kc (single trip) and 34 Kc (round trip). The ride is free with the Labe-Elbe-Ticket.
The public transportation network in Usti is sufficient. Buses go practically everywhere, to every little village in the surroundings, to the places of interest, even to the small towns at the foot of the Erzgebirge mountains like Chlumec and Krupka. Central stops are the bus terminal (Autobusove nadrazi), the main railway station (hlavni nadrazi), Mirove namesti e.g.
What I liked very much were the trolley buses that do not pollute the air, run with electric power from the overhead lines instead (see pics). Not all of them have that system, but at least in the centre most do.
A map can be downloaded from the website below, but the website is in Czech only (this would be the link for the map right now: http://www.dpmul.cz/download.php?idx=4997). Fares are calculated upon the travelled zones (you will most likely travel in the zone Usti only, Krupka, Chabarovice and Chlumec are separate zones), and on the length of the trip. For 45 minutes you pay 18 Kc, for 75 minutes it's 25 Kc (about 1 Euro), a day ticket is 80 Kc (about 3 Euro). If you travel with the Labe-Elbe-Ticket all buses and trains are included.
Purchase tickets at machines or at Trafika shops in advance and validate them upon entering the bus. You can buy from bus drivers, too, but you should have coins and if I recall correctly it costs a small surcharge.
Usti has several railway stations, the main station (pics 1, 3) being right between the river and the old town - very convenient. It is served every two hours by Eurocity (EC) trains running from Vienna or Budapest via Prague to Dresden and Berlin, some even to Hamburg. There are also trains going in all directions to towns in the Czech Republic - Decin, Karlovy Vary, Liberec etc. Fast trains beside the EC connect Usti with Prague every other hour, filling the gap between the ECs.
It may happen that you have to change trains at Usti nad Labem zapad (West), a train station that is not nearly as nice as the main train station - rather run down and shabby. I was unfortunate enough having to change there to a regional train to Litomerice - pics 4, 5. That train was in pitiful condition, too - old, the seats dirty, the windows even dirtier so you could barely see through.
Anyway, usually the trains are in good condition, new and clean, and mostly also on time. EC trains are quite often late, though.
Tickets can be obtained at the counter or from machines. For travels within the Czech Republic fares are inexpensive. For international travel watch out for specials, Dresden - Usti for 19 Euro one way e.g. or get the Labe-Elbe-Ticket, see also my tip on my Litomerice page.
Big luggage lockers are available for small money at the main station.
I was standing on this station 12 hours trying to get a train to Berlin,
People was not very helpful.