If you hate crowds, stay clear of Chicago's O'Hare International or Los Angeles International airports for Thanksgiving.
For the third straight year, O'Hare and LAX were the nation's two busiest airports, according to booking data by the travel website Orbitz.com.
Last year, LAX was ranked the busiest, with O'Hare coming in second, according to Orbitz. The two airports switched places in the ranking this year, with San Francisco International Airport coming in third, the website said.
As expected, the Wednesday before Thanksgiving will be the busiest departure day, with more than twice as many travelers flying as on Thanksgiving Day. The Sunday after Thanksgiving will also be an ugly scene at the airports, according to Orbitz.