[kzrdude]

The ICE train going south towards Basel stops at the Frankfurt airport. The minus is that there is probably no train connecting directly to Strasbourg, but it's also not far away - take the stop at Offenburg and a train or shuttle bus to Strasbourg would do it.

[bobthepanda]

A two-seat connection that requires leaving the airport is hardly ideal for someone connecting through Frankfurt. People want to minimize the amount of legs on their journeys.