Sorry, I just guessed the difference. It was DC to Manhattan one-way. Looking at emails, I paid $20 for Flixbus in Nov 2019, booking three days in advance. I re

Sorry, I just guessed the difference. It was DC to Manhattan one-way. Looking at emails, I paid $20 for Flixbus in Nov 2019, booking three days in advance. I recently took the same trip by Amtrak and paid $29, but I booked two weeks in advance, plus pandemic. Booking an Amtrak departure for three days from now costs $128-196. [A related way to save money I've regretted is flying from Paris to London rather than taking Eurostar. More false economy.]