Most tourist routes are well served by flights operated by the national airline, the Uzbekistan Airways. Book more than three days in advance to avoid problems with Overbooking at airports. Even so, it's not 100% guaranteed that it won't happen.
The country's main line is Tashkent – Samarkand – Bukhara is regularly covered by trains of considerable size. One of them, the “Registon” takes 4 hours to travel from the capital Tashkent to Samarkand. A more recent one, the “Afrosiob” connects Tashkent to Samarkand in just 2,5 hours. THE “Sharq” travels the 600km that separate Tashkent from Bukhara in 7,5 hours.
One of these trains runs the entire route at night with sleeping carriages, which allows you to save a night's stay and rest on this route. Other very useful overnight itineraries link Tashkent with Samarkand and Urgench; even to Nukus-Kungrad. These connections are advantageous and quiet approximations to Khiva and to the Aral Sea, two of the most emblematic places in Uzbekistan.
There are several types of trains:
Fast (weave poyezd) or expressed; high speed (yuqori tezlikdagi poyezd); of Passengers (yo'lovchi tashuvchi poyezd)
There are also four types of wagons and sleeping compartments:
Soft (alohida xonali wagon) – 2 bunk compartments; Kupeli – 4 bunk compartments; platskart – bunk beds occupying an entire carriage.
Choose the bus for long journeys if you are on a hyper-tight budget and have plenty of time for the slow journey and patience for all the unforeseen events that may happen. The rest stops themselves can turn out to be an adventure, made in roadside restaurants with few or no conditions, including worse-than-basic bathrooms.
City buses, on the other hand, operate with relative stability and speed. Again, only if you are on a tight budget, they are a great alternative to inexpensive taxis. In Tashkent there is a subway. If the metro passes where you want to go, prefer the metro.
At the time of creation of this text, there were no rent-a-cars in Uzbekistan. It is possible to drive your own car but you will have to buy it or bring it from another country. Uzbekistan continues to follow the Soviet tradition. If you dare to drive your own car, be prepared for frequent stop operations with little consistency where officials are likely to suggest certain offers to save you from higher expenses with fines and other liabilities.
As an alternative to buying a car, you can hire a driver with your own car. It is not easy to estimate a price for this type of service. Above all, bargain with patience and courtesy and agree on a value that feels fair to both parties. If you want a reference, in Uzbekistan, fuel and other expenses apart from €60 to €150 per day will probably be seen as excellent payouts.