The U.S.'s biggest airlines are offering free refunds and changes ahead of looming flight reductions caused by the government shutdown.

Why it matters: The Federal Aviation Administration is expected to close airspace for hundreds of flights — delaying potentially thousands of travelers nationwide. • Many airlines expect the cancellations and airspace closures to start Friday, Nov. 7.

Driving the news: The FAA said on Wednesday it plans to reduce 10% of flights at 40 major U.S. airports — adding to the logjam already plaguing airports amid the government shutdown. • Hundreds of daily flights could get cut, with hundreds of thousands of travelers affected, per aviation analytics firm Cirium. • It's unknown which airports will be impacted by the changes, as the FAA has not publicly c

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