I would advise you to wait until the volcanic ash is fully settled.
Look to the related link below for a travel guide to Frankfurt .
About an hour and a half
Yes, you can.
You can travel to Frankfurt by plane using the Northwest Seaport.
10 hours
869 miles
The distance from Minneapolis Minnesota to Frankfurt Germany is 4,379.45 miles. This takes approximately 10 hours and 13 minutes to travel by air.
You can travel from Frankfurt International airport to Büdingen by train with a change at Frankfurt/Main (Hauptbahnhof) and another at Geinhausen. Total journey time: about 1h20. Frequency: approximately hourly.
8.5 hours
A flight will take about 10 hours.
I want to travel on the Adriatic highway
About 6h45 (with a change of trains at Brussels).