CHICAGO — Spirit Airlines is offering 25% off Chicago flights this week to celebrate its 25th anniversary at O'Hare.

The offer applies to one-way flights, connecting flights from Chicago or the Chicago-portion of a round-trip flight.

People can enter the code "25PCT" from Monday through Sunday. Flights for the promotion need to be through Oct. 20 and Dec. 10. However, flights are excluded on Fridays and Sundays and from Nov. 20 through Dec. 2.

“For 25 years our Chicago Guests have embraced our high-value service, and we’re excited to commemorate this milestone moment with a special flight deal for Windy City travelers,” said Rana Ghosh, Senior Vice President and Chief Commercial Officer. “A big thank you to the O’Hare airport team for their partnership over the years as we continue to d

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