4 domestic roundtrip flights or $506 in Amazon.com gift cards – Citibank : Citi Platinum Select AAdvantage Visa Signature card; Exp. – unknown

LINK
Note: 100,000 bonus miles + 22,000 regular spending miles can be redeemed for 4 free MileSAAver American Airlines round trips or $506 in Amazon.com cards via Points.com .
If you spend extra $3,000 with the card, you would have enough miles for 5 free MileSAAver American Airlines round trips.
If you decide to redeem miles for gift cards, your net profit will be $421 ($506 minus $85 annual fee during the second year).
Terms:
50,000 bonus miles - spend $4,000 within 2 months
25,000 bonus - spend $10,000 within the first year
25,000 bonus - spend $10,000 within the second year
No annual fee during the first year
A total of 25,000 American Airlines AAdvantage miles may be redeemed for roundtrip Coach Class Continental U.S. / Canada MileSAAverSM awards. For more information on AAdvantage award redemption please see Redeem Miles at www.aa.com/aadvantage.