A $20 bus ride from Talinn to Riga gives you Wi-Fi en route: Cyrus Farivar takes reports on a five-hour bus ride in the Baltics on what is probably the only cross-border Wi-Fi bus option in this audio piece for PRI's The World. (There's a train line in Sweden that has Wi-Fi and stops over the border in Copenhagen, Denmark.) The bus is a pretty high-end model, with a number of other amenities. "Stewardesses" are in the future.
Now in interesting circular relationships, Veljo Haamer, Estonia's Johnny Wi-Fi-seed, took a ride on the Capitol Corridor train line partly because of reading about my coverage of it here at Wi-Fi Networking News. He took the idea back and advocated for adding Wi-Fi to the line.