I Booked a Delta one way in Business from Flying Blue from TLV to JFK.
The taxes for the infant I was told for a one way would be $385 and a round trip would be $350. I tried doing the roundtrip but they said that since it is a paper ticket (for the infant) it will not work bec, it is linked to my itin.
An option could have been to make another refundable return (it may have worked).
I did not want to wait till the airport bec. youneed to be there a little earlier plus I was afraid that they would charge me more then $385.
In the end I called up Delta in the US and they said that they cannot mail it overseas. I called Delta in Israel and she said that they cannot mail, either pick it up at their offces in Tel Aviv or the airport they cannot mail the ticket(Israelis!)
Then I asked her to check how much a round trip one way business and return economy open ended, The price for that was $282.
I told her to book it and I will worry about getting the ticket later.
After it was booked (by sending in copies of ID and CC!!) she told me that she will send it to the airport and it will be waiting by the ticketing counter.
I hope the ticket does not get lost!