Airport is quite a haul. If you're going to the south side of town, its been a while, but i suspect you take Interstate 95 south and it should run into interstate 10, as you go over one of many a bridge. They have a ton of bridges now. It's expensive to take a cab trust me on this one. Your best bet is to RENT A VEHICLE. Probably run you in neighborhood of 50 bucks one way plus tips. Airport is FAR from downtown jayville.