Hello! It's great to hear that you're planning a visit to Shiraz, Tehran and Isfahan. Here are some travel tips for you:

Best Time to Visit:
The best time to visit these cities in Iran is in the spring (March to May) and fall (September to November). The weather is more pleasant during these periods. Summer can be extremely hot, while winters are bone-chilling in most parts.

Route and Accessibility:
With an international airport in both Shiraz and Tehran, you can easily opt for direct flights from various parts of the globe. Domestic flights and train services are convenient for inter-city travel. Road connectivity is also excellent.

Accommodation and Booking:
Tehran, Shiraz and Isfahan offer a wide range of accommodations from budget hostels to luxury hotels. It's advisable to book in advance, especially during peak season. Online booking platforms provide competitive rates and options.

Clothing and Essentials:
Iran is a conservative country, so dress modestly. Women must wear a hijab or headscarf in public. Pack lightweight, loose clothing for the warmer months and warm layers for winter. Don't forget essentials like sunscreen, hats, and a good pair of walking shoes.

Health and Safety:
Ensure you are up to date with routine vaccines before travelling. Avoid drinking tap water and choose bottled or properly treated water instead. Bracing traffic in populous places like Tehran could be challenging, so follow local traffic norms and be cautious.

Local Etiquette and Respect:
Iranians are known for their hospitality and politeness. Respect local traditions and customs. Avoid discussing sensitive political issues. Remember to take off your shoes when entering someone's home.