Frontier Airlines is a Denver-based airline with flights throughout the continental US, Alaska, Mexico, Costa Rica, Jamaica, and the Dominican Republic.

Right now The Frontier Airlines World MasterCard® is offering 40,000 bonus miles after spending only $500 in the first 90 days.

That's a huge sign up bonus for such a tiny minimum spending requirement. Making it even better is the fact that Frontier charges only 10k miles each way for a Standard award within the United States including Alaska.

Frontier has announced a 10% discount on domestic flights purchased by February 26, 2014 and flown by June 12, 2014 with promo code PLAYBALL.

This 10% 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.

Frontier has announced a 14% discount on domestic flights bought by February 6, 2014 and flown by March 12, 2014 with promo code SUPER. (Blackouts: February 13, 14, and 17)

This 14% 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.

Frontier has announced an 18% discount on domestic flights bought by January 16, 2014 and flown by March 12, 2014 with promo code HURRYHURRY. (Blackouts: February 13, 14, 15, and 17)

This 18% 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.

The Frontier Airlines World MasterCard® recently increased its sign up bonus to 40,000 bonus miles after spending $500 in the first 90 days.

The sign up bonus is extremely generous for such a small minimum spending requirement, and the miles go a long way because of Frontier's cheap award chart.

Domestic flights--including to Alaska in the middle of the summer--are only 10k miles each way.

Until January 14, 2014, you can buy Frontier EarlyReturns miles from points.com with up to a 50% bonus on the miles you buy.

The Frontier Airlines World MasterCard® is currently offering its best sign up bonus I've ever seen: 40,000 EarlyReturns miles after spending $500 in the first 90 days of cardmembership.

This huge sign up bonus, especially for such a tiny minimum spending requirement, is enough for:

Two roundtrips anywhere in the US that Frontier flies, including Alaska (30,000 miles).
One roundtrip anywhere Frontier flies, including Central America, Mexico, and the Caribbean (30,000 miles).

Frontier Airlines is the ninth-largest airline in the United States with a hub in Denver and service to Alaska, Mexico, Jamaica, the Dominican

The offer on the card listed in this post has expired so the links have been removed. Click here for the top current credit card sign up bonuses.

Last week I wrote about The Incredible Frontier Airlines Award Chart. The takeaway is that Frontier is not for everyone because it doesn't have first class, and it only only flies throughout the US, Central America, and the Caribbean.

But if Frontier is for you, it's really for you.

The application links for the cards mentioned in this post have been removed because they are expired.
Click here for the top current credit card sign up bonuses.

Full offer details on the 40k bonus mile Frontier card offer:

0% Intro APR on purchases and balance transfers for the first 12 months.