American Express Membership Rewards is widely regarded as one of the most-valuable transferrable currencies thanks to having over 20 transfer partners and lucrative transfer bonuses. However, the program just lost a little luster with the loss of one of its airline transfer partners.

Air France and KLM recently launched a new partnership with Virgin Atlantic, making both Flying Club and Flying Blue miles even more valuable. You’ll now have the ability to book partner awards on either airline using the other’s currency. In this article, we’re digging into the new partner award options to highlight the best values.

From now through November 30, 2019, you can transfer American Express Membership Rewards to Air France/KLM Flying Blue miles with a 25% bonus. To take advantage of the promotion, you need to transfer a minimum of 1,000 Membership Rewards points.