Gogo is offering 25% off a 24 hour pass.

It does not mention an expiration date on the landing page.

Thanks to Sice for the tip.

UPDATE: It is good through Labor Day. Confirmed by DL

UPDATE 2: The offer does not apply to purchases in flight – buy before you fly!

GoGo internet is offering free wifi internet on Delta flights for the month of August by entering in promo code DIETCOKEGOGO.

A 24 hour pass usually costs $12.95!

UPDATE 11 Aug: Some are reporting that the deal is dead.

The American Express promotions just keep rolling in.

Receive up to a $20 American Express statement credit when you make a purchase till December 31, 2010 at the following airport merchants:

1)Dunkin Donuts at JFK (John F Kennedy), EWR (Newark), and LGA (LaGuardia)

2)Brookstone at JFK (John F Kennedy), EWR (Newark), IAH (Houston George Bush) and LGA (LaGuardia)

3)Hudson News at JFK (John F Kennedy), EWR (Newark), CLE (Cleveland International), and LGA (LaGuardia)

4)GoGo Internet flight at “10,000 feet and above”

There’s no registration required and no mention of what brand of card is eligible. The credit should appear after 5 business days. The link to the promotion is here.

Thanks to Erndog for the tip

From November 20th to January 2nd, WiFi on Delta flights is free courtesy of Google Chrome.

Happy Holidays from Google!

It is also free on Airtran and Virgin America.