There's no airport in Umluj city. Umluj is located in the middle between Yanbu and Al Wajh and each has an airport. You can take a flight to Yanbu Airport then have a two-hour car ride to Umluj.
It takes nearly 5 hours to drive from Jeddah to Umluj. There are also 3 or 4 flights daily from Jeddah to Yanbu which is the closest major city to Umluj. Alternatively, a taxi service is available and can be shared to keep the cost low. Buses operated by the national company SAPTCO from Jeddah airport also offer city to city services and are cheap and very convenient.
Umluj houses a number of hotels which all offer excellent service and guarantee you a comfortable stay. For example, the boutique Juman Hotel offers beautiful sea views and a central location for exploring, while Royal Tours Permanent Camp is home to Bedouin-style tents, set in the sandy desert on the edge of town.