By plane
The closest major airport is Corpus Christi International Airport (http://www.corpuschristia...)
By car
Port Aransas is accessible from the north by ferry across the ship channel. As of May 2008, the ferries are free but there is talk of adding a toll. Between Memorial Day weekend and Labor Day the wait for the ferry can be up to 2 hours from Friday evening through Sunday evening to get on or off the island. During the week during the summer months the wait can still be 45 minutes to an hour during the day. After Labor Day, the waits are usually less then 30 minutes.
There is a causeway across the ship channel from Corpus Christi to Padre Island that makes getting to Port Aransas easier from the south, especially during the summer. The causeway is part of Park Road 22. The major highway to get there is IH-37 from San Antonio. US Hwy 77, which runs from the Mexico border to Waco where it joins IH-35 intersects IH-37 just west of Corpus Christi.