Hello! Sounds like an exciting journey ahead. Here are some travel tips for your visit to Najran, Abha, and Jizan in Saudi Arabia:

Best Time to Visit:
The best time to visit these places in Saudi Arabia is between November and March when the weather is cooler. Summers in Saudi Arabia can be extremely hot with temperatures reaching up to 50°C.

Route and Accessibility:
Riyadh is the main international gateway to Saudi Arabia. From there, you can take a domestic flight or drive to Najran, Abha, and Jizan. It's best to rent a car as public transportation isn't well-developed outside of the major cities.

Accommodation and Booking:
Saudi Arabia offers a variety of accommodations ranging from luxury hotels to budget accommodations. Use reputable booking sites to get the best deals, and make sure to book in advance, especially during the Hajj season.

Clothing and Essentials:
Saudi Arabia is an Islamic country, so dress modestly. Long, loose clothing that covers your body, including your arms and legs, is recommended. Also, don't forget to pack sunglasses, sunblock, hats, and other sun protection items to protect yourself from the intense sun.

Health and Safety:
Saudi Arabia is generally a safe place to visit but ensure that you have travel insurance. Also, remember to stay hydrated in the hot climate, and take precautions against heat exhaustion and heatstroke.

Local Etiquette and Respect:
In Saudi Arabia, showing respect towards the local traditions and religious practices is vital. Always dress modestly, avoid consuming alcohol as it's illegal here, and respect prayer times when public services may close.