Including all charges, AT&T reported a net loss of $975 million, or 28 cents a share.
Including all charges, the company lost $199 million, or $1.19 a share.
The watchdog found many were advertising low prices by not including all charges.
Flights easyJet: Berlin - Budapest: £11.73 (including all charges) easyJet: Budapest - London £22 (including all charges) Other options include Sky Europe, Wizz Air, German Wings and EU Jet who fly to a place called Kent International!
Including all charges, AT&T reported revenue of $13.09 billion, down about 7.7percentt from $14.18 billion in the quarter a year earlier.
Including all charges, the company reported a loss of $105 million, compared with a loss of $199 million in the third quarter.
Including all charges, AT&T said it earned $1.32 billion, or 35 cents a share, down from 50 cents a share during the third quarter of 1999.
Including all charges, investments and acquisitions, AT&T earned 54 cents a share, or $1.7 billion, up from 38 cents, or $1.1 billion, in the comparable period last year.
Including all charges and gains, AT&T formally reported earnings of $1.15 billion, or 36 cents a diluted share, down from $1.99 billion, or 75 cents a share, during the comparable period of 1998.
Ryanair (0871 246 0000; ryanair.com) flies to Marseille from Stansted, Bournemouth, Glasgow and Dublin from £20 return, including all charges; Easyjet (0905 821 0905; easyjet.com) from Gatwick and Bristol from £46 and bmibaby (0871 224 0224; bmibaby.com) from Birmingham, from £46 (all fares include taxes and charges).
