In an international airport there will be customs and immigration officers present, and these days in any airport there will be security personnel looking for folks who seem nervous. You also may have to present identification several different times. If you have a valid id, such as a driver’s license, and if you can keep your cool and not fall into a high risk profile there shouldn’t be a problem. Have you considered driving or taking the bus or the train instead? Terrorists are less likely to use those forms of transportation to hurt large numbers of people, so no one keeps as strict an eye on them.