(Full Details here) Los Angeles- Colorado Springs DBLAX 5/18-6/30 Phoenix- Colorado Springs DBPHX 5/18-6/30 Portland-Colorado Springs DBPDX 5/20-6/30 Seattle-Colorado Springs DBSEA 5/18-6/30 Bellingham-Denver DBBLI 5/24-6/30 Bismark-Denver DBBIS 5/17-6/30 Bloomington/Normal-Denver DBBMI 5/18-6/30 Cedar Rapids-Denver DBCID 5/17-6/30 Great Falls-Denver DBGTF 5/14-6/30 Harrisburg-Denver DBMDT 5/22-6/30 Knoxville-Orlando DBTYS 5/15-6/30 Madison-DCA DBDCA 6/7-7/7 This promotion is open to all EarlyReturns® members who register for the promotion prior to qualifying flight activity. Members must register online atFrontierAirlines.com/memberoffers, using promo code ____. Bonus mileage offer is valid for all qualifying Frontier Airlines flights between__(city)__ and __(city)__, Date – date. Members must fly on published fare tickets and request to earn EarlyReturns miles to qualify for the double miles. Classic or Classic Plus fares will also earn double miles on the base flight miles flown. Bonus miles do not count toward elite status. This promotion may not be combined with any other mileage promotion and is offered in conjunction with all program rules and procedures. Additional restrictions may apply. Frontier Airlines is the final authority on the interpretation of these rules.