Hello! It's exciting to hear that you're planning to visit the beautiful Portuguese cities of Évora, Coimbra, Sintra, and Porto. Here are some travel tips to help you plan your journey.

Best Time to Visit:
Best time to visit Portugal is during spring (March to June) or during the fall season (September to October) when the weather is pleasantly warm with less crowd.

Route and Accessibility:
You can fly into Lisbon or Porto, which have the largest international airports in Portugal. From there, you could rent a car or make use of the reliable train and bus services to reach your destinations. Don't forget to visit Sintra, a short trip from Lisbon.

Accommodation and Booking:
All these cities have a wide range of accommodations, from budget to luxury. Booking in advance is highly recommended, especially during peak season. Platforms such as Booking.com, Airbnb, and the official hotel website can be used for reservations.

Clothing and Essentials:
Pack lightweight, breathable clothes for warm weather but also carry a light jacket as it can get a bit cooler at night. Comfortable walking shoes are a must as you'll be exploring many historic sites. Don't forget a sunhat, sunscreen, and a good camera.

Health and Safety:
Portugal is generally safe for tourists but standard precautions should be taken to protect your belongings. Tap water is safe to drink. Healthcare facilities are good but travel insurance is recommended.

Local Etiquette and Respect:
Portuguese people appreciate politeness. When entering shops, it's customary to greet with a 'Bom dia' (Good day), 'Boa tarde' (Good afternoon) or 'Boa noite' (Good evening). Respect queues and personal space.