One reason I use a TA that hasn't been mentioned here, is to break down my segments for invoices. I see several clients in a multi segmented trip and want to bill each of them for their share of the trip. My TA can give me a fairly accurate breakdown of each clients share in the form of an invoice. I read somewhere on FT that there is an on-line site that can do this but I couldn't find it.

Also, And I'm not sure about the ethics of this, I fly alot to BDL-PHL_RIC return. If I leave on Sunday returning Friday, the price on US is around $800 RT. I have been doing a number of mileage runs staying over on Saturday, such as BDL-PHL-LAX-CHT-RIC-PHL-BDL at $320. MY TA will omit the LAX-CHT portion and just give me an invoice for BDL-PHL-RIC. He says he does this for a lot of clients. This service is more than worth the $15.00 fee.