Passengers board the first Avelo Airlines flight from Santa Rosa to Kalispell, Montana, at the Charles M. Schulz-Sonoma County Airport in Santa Rosa on Wednesday, May 1, 2024. The busiest travel days Thanksgiving week are expected to be Wednesday and Sunday. (Christopher Chung / The Press Democrat file)

Officials at Chicago's O'Hare Airport are expecting a huge surge in passenger traffic. An over 11% increase compared to last Thanksgiving is expected. Sunday is expected to be the busiest day in Chicago.

Thanksgiving travel is in full swing at Chicago airports with officials projecting nearly 2 million passengers will travel through the city over the holiday weekend.