I'm looking to fly from Istanbul, Turkey (IST) to Nairobi, Kenya (NBO) and then to Tel Aviv, Israel (TLV). By far the cheapest flights I could find are a round trip from Istanbul to Nairobi, and then a one way flight to Tel Aviv. The round trip and one way tickets would be through different airlines.
I am wondering what, if any, difficulties I will face changing planes in Istanbul, Turkey on my way back from Nairobi to Tel Aviv. This will not be a normal layover as I am used to with a single ticket purchase. I will need to check into my second flight to Tel Aviv, since that airline knows nothing about my connection. Would I be able to do this without leaving the international transit area of the airport? I would like to avoid the hassle and possible problems of going through immigration just to go to the airline ticket counter to retrieve a boarding pass.
Perhaps checking in online and print my boarding pass? Sometimes airlines still want you to check in at the counter or a computer kiosk before heading to the gate.
To make matters slightly easier, I will not be checking any bags. Also, I am a US citizen if that matters.
Right now it looks like the round trip ticket (Istanbul<->Nairobi) would be through Egypt Air and the one way (Istanbul->Tel Aviv) would be on Aegean Airlines.