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Frontier has announced a 15% discount on domestic flights bought by Thursday April 17, 2014 and flown by June 12, 2014 with promo code REFUND. Sale fares apply every day except Fridays and Sundays.

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This 15% discount does not apply to Frontier’s international destinations like Jamaica, Mexico, Costa Rica, and the Dominican Republic.

To get to those places, your best bet is to redeem 15k Frontier miles each way. You can get The Frontier Airlines World MasterCard® with 40,000 bonus miles after spending $500 in the first 90 days, which is more than enough for a roundtrip anywhere Frontier flies or enough for two roundtrips within the USA.

How does the 15% discount work?

Frontier has offered these limited time 10-17% discounts frequently this year. They are a nice bonus, since Frontier’s flights are often already extremely cheap.

To get the discounted airfare, go to flyfrontier.com and perform any domestic search for flights before June 12 with promo code REFUND.

The screen shots in this post are from the last 14% discount because the idea is the same.

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I priced out a weekend trip from Los Angeles to Denver on a previous 14% sale. The 14% discount off the base fare–not including taxes–shows up on the flight selection screen.

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After the discount, I found a $121 roundtrip.

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On the purchase screen, all the checked bag fees, change fees, seat selection fees, and mileage earning are clearly spelled out, which is a nice touch. Frontier fees are a bit below their competitors’.

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Full terms & conditions of 15% discount:

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Don’t forget you can get The Frontier Airlines World MasterCard® with 40,000 bonus miles after spending $500 in the first 90 days, which is more than enough for a roundtrip anywhere Frontier flies or enough for two roundtrips within the USA.