Hartford (CT) -Springfield (MA) in the northeast US has free wifi, and it works very nicely, too.
What airports have Wifi?
Hartsfield International Airport in Atlanta,GA offers WI-FI. The cost is $7-$9. You can log on as many times in that 24 hour period.
Free in San Jose airport (SJO), Costa Rica.
You might be able to find that information at http://worldairportguide.com/ . Good luck.
-goldiemy-