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Recent Regulations and Guidelines

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Look Up N-Numbers

N-number format

An N-number can be in any of these formats

  • One to five digits (N12345)
  • One to four digits followed by one letter (N1234Z)
  • One to three digits followed by two letters (N123AZ)

N-numbers do not have

  • A zero (0) as the first number
  • The letters "I" or "O"

Drones/​Unmanned Aircraft Systems (UAS)

Check Airport Status and Delays

Browse Delays

  • ORD

    WEATHER / SNOW-ICE

    Average delay 1 hour and 7 minutes

Browse Delays

There are no airport closures at this time.

Browse Delays

  • ORD

    WEATHER / SNOW-ICE

    Ending 10:30 am CST.

Browse Delays

  • ORD

    WX:​Snow/Ice

    31 minutes — 45 minutes

View all flight delay information

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