Absolutely! Here are some travel tips for your journey to Lisbon, Porto, Coimbra, and Faro:

Best Time to Visit:
The best time to visit these places in Portugal is during the spring(March to June) and fall (September to November), when the weather is pleasant. Summer is also good, but it can be crowded and hot, especially in Faro.

Route and Accessibility:
Lisbon is well connected by air with major cities around the world. From Lisbon, you can take a train or bus to Porto, Coimbra, and Faro. All these cities are well connected by the Portuguese rail and road network.

Altitude and Acclimatization:
These cities are at sea level and altitude sickness isn't a concern.

Accommodation and Booking:
Accommodations ranging from luxury hotels to hostels are available in all four cities. It's advised to book in advance, especially if you're visiting during peak tourist season.

Clothing and Essentials:
Lightweight clothing for the day and a light jacket or layer for the evening is recommended for most of the year. If you're planning to visit in winter (December to February), carry warm clothing. Don't forget a comfortable pair of walking shoes as these cities have beautiful streets to explore. A sunscreen, sun hat, sunglasses, and reusable water bottle may also come in handy.

Health and Safety:
European Health Insurance Card (EHIC) holders are entitled to state provided medical treatment in Portugal. Ensure you have adequate travel health insurance and accessible funds to cover the cost of any medical treatment and repatriation. Tap water in Portugal is safe to drink.

Local Etiquette and Respect:
Portuguese people appreciate a courteous approach. When entering shops or restaurants, say "Bom dia" (Good day), "Boa tarde" (Good afternoon) or "Boa noite" (Good evening), and always say "Obrigado" (Thank you). The Portuguese are proud of their culture and history, so showing interest would be appreciated. Do respect queues and personal space.