Several online sites are publishing the codes airline passengers can use to get free in-flight WiFi, but with the recent terrorist attempt on Delta’s Amsterdam to Detroit flight, it could be tough to actually use them.

Rumor is that the Transportation Security Administration is going to ban all electronics from international flights arriving in the United States and will restrict passenger use of electronics on domestic flights for the last hour of the trip.

So good luck logging on and getting any work done in the air.

If you do get permission to use your laptop or smartphone in the air, you may be able to give in-flight WiFi a try. Just recently, mymoneyblog.com published the codes travelers can use on select Air Canada, Airtran, American, Delta, United and Virgin America flights.

The WiFi service is being provided by GoGo, and the codes give you one free session of their service. When you log in, they require an e-mail address, but no credit card. Also, you won’t have to confirm your e-mail address (kind of obvious eh?) and if you’ve got multiple e-mail addressess, you can probably get more than one free session.

One more note: You won’t need a code if you’re flying Virgin America; they’ve struck a deal with GoGo to provide free WiFi to everyone on their flights through January 15, 2010.

All codes have expiration dates, but we’ll repeat them here for your use:

Expire 12/31/2009
DELTATRYGOGO
AIRTRANTRYGOGO
AATRYGOGO

Expire 1/7/2010
2287548427snk
2472564126dvu
2285632980tlk

For those of you who give it a shot, let us know how it goes!

Tags: Air Canada, airlines, Airtran, American Airlines, codes, Delta, free, inflight, United, Virgin America, WiFi