U.S. to Overseas Custom Report Background
SIAT results are expanded to represent all U.S. travelers to overseas destinations, based on the Department of Homeland Security (DHS) APIS/I-92 database. The APIS data must be submitted for all arriving and departing flights from the United States for all countries. The departing flight information is the only U.S. government source for estimates of U.S. citizen departures from the country.1
SIAT Questionnaire Content
Survey Operations
Survey Participation
Typically, more than 90 unique airlines participate in the survey during an average calendar year. The NTTO relies upon the voluntary participation of airlines to collect data on international travelers. While the data are expanded to represent all U.S. travelers based upon the DHS APIS/I-92 database, no expanded estimates of U.S travelers are possible for destinations for which there were no survey respondents. This means that if no surveys are collected for a particular market, no weighting scheme can correct for this absence.
When reviewing the estimates developed from a subset of the survey data, users need to carefully review the number of respondents for each column heading, as well as the list of participating carriers. The absence of an airline and lower sample sizes will impact the estimates developed for the origin and destination figures.
1 Monthly U.S. citizen departure figures by region can be found on the NTTO website: http://travel.trade.gov