as much as 28 days late
I went 6 weeks.. only got paid because they needed me to pick up another contract. The teased me with fake itineraries (until I called reservations and found they never paid or the tickets) to get me to actually move. After 6 weeks they paid up and shorted me with the promise of making good once I landed where they wanted me to.
played the game right back, telling them I was packed and ready to go and when it seemed tickets were coming something would come up. Eventually they released me from any obligations, although they still owe me. Better to get out with a small loss versus a large loss.