On the Silver Meteor, a little under 26 hours.
24 hours from Orlando to Philadelphia on the Amtrak train
St. Augustine does not have Amtrak service. The closest Amtrak station is Palatka. There are two trains daily between Miami and Palatka.
Amtrak is not a good option since you will have to go up to Washington, DC and then catch another train to come back down to New Orleans.
According to Amtrak anywhere from 1 hour & 38 minutes to 2 hours.
17 to 18 hours approximately.
Take the subway eastbound from the Amtrak station (30th Street Station) to 11th Street.
The best thing to do is to get on the California Zephyr at Emeryville to Chicago, change to the Capitol Limited to Washington, DC, and change to the Silver Star to Miami. That will take 4 days and 6 hours.
The Philadelphia 30th Street Station that is utilized by Amtrak is on the western edge of downtown. Unless you have business in that part of downtown Philadelphia, you may wish to take a taxi into the heart of the center city.
It will take around the 2 hours and 20 minutes.
You can make the border in about 13 hours. It's at least another six hours to Miami.
It generally takes about 55 minutes to get form Miami (MIA) to Nassau (NAS).
Its 41miles by car. By train, take SEPTA R7 to Amtrak 30th Street station then take SEPTA R1 to Philadelphia Airport. Thanks, Kasi