I got another email from Copa tonight. This one is a M+ member email, so I'm not sure how many received it, but the email is in Spanish, so it may have been targeted at those of us known to live in Latin America. You can sign up on UA's site by clicking here. Details: Fly on Copa Airlines in August or September, and you will earn double miles on any Copa flight you take in October - December. To qualify, fly on Copa Airlines between August 1, 2014, and September 30, 2014. Then you will earn double miles on any Copa Airlines flight you take between October 1, 2014, and December 31, 2014. Tickets for both periods must be purchased after July 14, 2014. Registration at united.com is required before travel, so register today. Terms and conditions: Offer is valid only for MileagePlus members. Registration on united.com is required. To qualify for the offer, register on united.com between July 15, 2014, and December 31, 2014, purchase and complete a flight on Copa Airlines between August 1, 2014 and September 30, 2014. Then you will earn double award miles on any Copa Airlines flight you take between October 1, 2014 and December 31, 2014 – tickets for both periods must be purchased after July 14, 2014. Flights connecting through the Hub of the Americas in Panamá qualify for the offer. Offer valid for tickets purchased through copa.com, Copa's reservation center, Copa Airlines city ticket offices or travel agencies for any Copa Airlines paid qualifying flight to any of Copa Airlines destination. On paid qualifying flights, members can earn double award miles on base miles earned for travel in C, D, Y, B, M, H, Q, K, V, U, S, W, E, L, T and N fare classes. Double award miles are defined as two award miles for each mile flown during the promotion period. This offer does not apply to Premier® qualifying segments (PQS), Premier qualifying miles (PQM), class-of-service bonus miles, class-of-service PQM, Premier bonus miles, redeemable bonus miles or other promotional PQM. Offer is not valid on Copa Airlines- or Copa Airlines Colombia-marketed codeshare flights operated by other carriers. Offer is not valid on government fares. Offer is not combinable. You can earn the bonus an unlimited number of times in accordance with these terms and conditions. The member's MileagePlus account number must be included on each reservation and flight activity must be posted to the member's account in order to qualify for this offer. Award travel is not eligible for the offer. Bonus miles will be posted to the member's MileagePlus account six to eight weeks after the end of the promotion period. Bonus miles are not transferable. Offer is subject to change without notice. Other restrictions may apply. Miles accrued, awards, and benefits issued are subject to change and are subject to the rules of the United MileagePlus program, including without limitation the Premier® program (the "MileagePlus Program"), which are expressly incorporated herein. United may change the MileagePlus Program including, but not limited to, rules, regulations, travel awards and special offers or terminate the MileagePlus Program at any time and without notice. United and its subsidiaries, affiliates and agents are not responsible for any products or services of other participating companies and partners. Taxes and fees related to award travel are the responsibility of the member. Bonus award miles, award miles and any other miles earned through non-flight activity do not count toward qualification for Premier status unless expressly stated otherwise. The accumulation of mileage or Premier status or any other status does not entitle members to any vested rights with respect to the MileagePlus Program. All calculations made in connection with the United MileagePlus Program and/or the Premier Program, including without limitation the accumulation of mileage and the satisfaction of the qualification requirements of the Premier Program, and/or the revisions of calculations (including any estimates), will be made by United Airlines and MileagePlus in their discretion and such calculations will be considered final. Information in this communication that relates to the MileagePlus Program does not purport to be complete or comprehensive and may not include all of the information that a member may believe is important, and is qualified in its entirety by reference to all of the information on the united.com website and the MileagePlus Program rules. United and MileagePlus are registered service marks. For complete details about the MileagePlus Program, go to united.com/mileageplus.