21.  At the time, administration officials said there had been two reports of unaccounted-for international flights, and two domestic flights were still seen as possible threats.

22.  At the same time, House and Senate negotiators agreed to kill a proposed levy on the domestic portions of international flights.

23.  At the same time, Newark Airport has been adding international flights to its already strong domestic base.

24.  Bag matching already is required on international flights.

25.  Bag matching is already required on international flights, but not domestic ones.

26.  -- Arrive at the ticket counter two hours ahead for a domestic flight, three hours for an international flight.

27.  A bureaucratic slowdown involving health certificates required for the international flight to Texas meant the bats were delayed for three days.

28.  A new survey claims dangerous viruses are being spread around the world through the sewage held in aircraft on international flights.

29.  A. Flying as a courier means traveling as an escort for packages, often legal or financial documents, on international flights at a discounted air fare.

30.  Additional international flights will be added, but advance planning and flexibility are essential.