Frontier Airlines said it hid five branded, green piggy banks in “creative spots across Denver’s city center” on Thursday.

The activity is linked to an online sweepstakes, where travelers can win a free membership to the carrier’s discount program.

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Spot a green piggy bank around the city? It's part of this airline's latest giveaway that includes free flights.

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For its latest giveaway, Frontier Airlines took to the streets of Philadelphia to hide five green piggy banks with a $1,000 flight voucher and membership ...

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CINCINNATI — People can win free flight vouchers if they find one of five green piggy banks hidden around downtown Cincinnati.

Frontier Airlines has hidden five company-branded piggy banks throughout Downtown Cincinnati, each containing free flights for the whole family ahead of the holiday travel season, per a press release.