From Grand Case (prounounced "cause") airport we caught the St. Barth Commuter for a day trip.
Warning - St. Barth's is VERY hilly - I almost thought our rental car would tip over. Nerve wracking...especially when you're rounding a bend and a car whips around the opposite way to make it up a hill.
We angled over to Grand Cul-de-Sac cove for lunch at O'Corail (a good meal on a nice/mellow beach!).
We then drove the 15 minutes to Saline - no facilities but apparently a top 5 beach in the world? Bad timing on our part as it was choked with seaweed and the water looked rough, so we ambled back to Grand Cul-de-Sac to lay out before catching the plane back to Grand Case. Park up on the hill to catch a plane flying in, they go right over cars, it's worth it!