Certainly! These Austrian cities are filled with rich history and stunning views. Here are few tips to make your trip amazing and comfortable:

Best Time to Visit:
Peak tourist season in Austria is between May and September when the weather is just perfect for sight-seeing. For skiing, consider visiting between December and March.

Route and Accessibility:
The best way to travel between these cities is by train. ÖBB, the Austrian Federal Railway services, is efficient and well-connected. You could also consider renting a car for more flexibility.

Altitude and Acclimatization:
While Vienna and Salzburg are at low altitudes, Innsbruck is in the Alps, but not so high as to require acclimatization.

Accommodation and Booking:
The cities offer a wide range of accommodations from luxury hotels to budget hostels. It's recommended to book in advance, especially during the peak season.

Clothing and Essentials:
For summer travel, pack lightweight clothing, a good pair of shoes for walking and sightseeing, and a raincoat or umbrella. For winter travel, don't forget your warm clothing, scarves, gloves, and boots. Sunglasses, sunscreen and reusable water bottle are also essential.

Health and Safety:
Pack a basic first aid kit, bring any prescribed medication and get travel insurance. Tap water is drinkable throughout Austria.

Local Etiquette and Respect:
Austrians are generally conservative in their behavior and appearance. Greetings are formal and it's customary to shake hands when meeting someone. It's also a good idea to say "Gruß Gott" (greet God) when entering shops.

Enjoy your magical trip to Austria!