Shadow arrives at the airport after being released with the news Laura had died, and is denied transferring his ticket to the same day. The end of the scene he says "how much for tomorrow?" The "next day" he meets Mr Wednesday on Wednesday. Later (35:01) the roll by of the newspaper shows Laura died on Wednesday. The latest she could have actually died given this information was Tuesday.
Right after meeting on the plane, Mr. Wednesday asks the flight attendant for a Jack and Coke for Shadow When she hands the drink to Shadow it's just a small amount in the glass, looking like the Jack without the Coke.