San Jose’s Norman Y. Mineta International Airport is giving travelers a heads up, warning them about a possible increase in traffic, and advising them to plan accordingly.

Memorial Day weekend marks the first of many celebrations that can cause traffic congestion in and around the airport. Graduations, weddings, showers and Father’s Day, among other festivities, are believed to cause additional traffic as well as new airlines and nonstop destinations.

“Now more than ever, trip planning is essential for passengers to