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Each year TSA publishes a report showing how much change and money was left by travelers at checkpoints in the U.S. We are the only outfit that I'm aware of that has combined the amounts for the past ten years, which is presented here.
Last year, a total of $653,689.98 was left at airports in the U.S. $34,016.06 at DFW and $739.27 at Dallas Love Field.
Additionally, we are the first, that I'm aware of, to share the FY2021 amounts anywhere - before national newspapers, cable news, or any media. Here they are:
Patchy rain nearby, with a high of 64 and low of 58 degrees. Don't forget your umbrella! Patchy rain nearby in the morning, light drizzle in the afternoon and evening, clear overnight.