Earn 40,000 bonus miles after $500 in purchases in the first 90 days. Redeem miles for two domestic roundtrip award tickets (subject to fees/taxes starting from $22.40). Earn 2 miles per $1 on FlyFrontier.com purchases and 1 mile per $1 on all other purchases. Award Redemption Fee Waiver. Just use your card for at least one purchase every 6 months to keep miles from expiring. Complimentary FICO® Credit Score.