[zimzam]

Air travel is usually cheaper than Amtrak though.

To travel from NYC to Chicago on Aug. 21st:

Flight: $124 nonstop (2hr 40 min) or $85 with layover (7 hours)

Greyhound (bus): $170 (23.5 hours)

Amtrak: $144 (19.5 hours)

If you value your time and/or your money the flights usually win