Update: this popular deal may have sold out. See more deals >

JetBlue has released a discount voucher that will take 20% off the price of any round-trip domestic fare. To redeem the offer, just book your flights at the airline’s special promo page and enter the code FALL2014 where prompted.

These are the rules:

– You can fly September 3 through December 18 (blackout dates apply on some routes — details here).

– No Friday or Sunday flights.

– Round-trip purchase required.

– Discount is take from your base fare only; taxes and fees are added separately.

– Book flights by 11:59pm ET August 27.

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