Even though it looks like the shutdown may be ending, there's no timetable regarding when federal government functions will be fully restored.
One problem is that air traffic controllers were working without pay, and some got fed up and decided to stay home. So yesterday, Trump screamed at them and ordered them to "GET BACK TO WORK!!!", threatening, in his usual manner, to "dock" the pay that they've rightfully earned (but haven't been paid) if they don't obey his imperial order.
The controllers' union has responded in kind and demands that Trump keep his earlier (worthless) promise that the controllers would be paid. Now, chances are, they will ultimately be paid, though perhaps with some "adjustments" and/or "retribution," but that's very unlikely to happen in time for Thanksgiving travel. So ..your canceled flight will stay canceled.
Plan on driving somewhere for Thanksgiving, or staying home.
For those of you who object to the "political" content of this post, I hasten to inform you that the actions of the evil Orange Man, in this instance, have zero to do with politics--as do the repercussions of those actions in regard to air travel.