Graham Harrison wrote:

"mrtravel" wrote in message
. ..



You will have to clear immigration and customs in the US.
You will have to go back through security before boarding your connecting
flight.


I agree with that. Arrive, clear immigration, clear customs, exit to main
terminal, check in, pass through security, depart.


Why would they have to check in again??

Usually, you exit Customs and give your bag to the people from the
airline that you are flying next. Well, assuming your bags have been
checked through.. This assumes you aren't flying Southwest after you get
to the US. My family members are flying back to the US and connecting to
WN at LAX tomorrow. However, they are carrying on luggage, and are
already checked in and have boarding passes for the Southwest flight.