Amtrak has announced a new discount program for group travel
For details see
https://www.amtrak.com/sharefares
Basically, it works as follows, for tickets purchased at least three days in advance.
Passenger 1 – full price Price
Passenger 2 – 15% off full price
Passenger 3 – 60% off full price
Passenger 4 – 70% off full price
Bob H