"the station codes are PDX to ART"

Thanks Weetbix! That worked. I didn't have the codes, I was just typing in "Astoria, OR" and the dropdown changed to "no matches". Although I now see that "Astoria" is recognized by itself for some reason and just clicking "GO!" would have worked even without a match on the first page. The Amtrak automated phone system didn't recognize it either... no matter!

Thanks again to everybody for jumping in to help.

Yosemite