Most frequent flyers think about miles the wrong way. They chase redemptions, eyeing that "free" business class seat on a 50,000-mile award. But the real game? Buying miles cheap and redeeming them at insane value. If you can buy miles at $0.008 per mile and redeem them for flights worth $0.015 per mile, you've just arbitraged travel.
Welcome to the miles arbitrage playbook.
The Math That Matters: $/Mile Economics
Here's the brutal truth: Not all programs create equal value. Some programs let you buy miles at a premium (expensive). Others practically give them away when you catch the right promotion.
The metric we care about: Cost Per Mile (CPM) when buying.
What's a good CPM for buying?
- Great: $0.008–$0.010 per mile (rare, usually promo-only)
- Good: $0.010–$0.012 per mile (decent windows)
- Meh: $0.012–$0.015 per mile (usually not worth it)
- Avoid: >$0.015 per mile (just book cash tickets)
The Winners: Flying Blue, Singapore KrisFlyer, ANA
Air France-KLM Flying Blue (SkyTeam) — BEST OVERALL
Flying Blue consistently offers the cheapest buying rates with their monthly Promo Rewards. Buy 32,000 miles and get 19,000 free? That's $0.0067 per mile—an absolute steal. Their monthly promotions on redemptions make this the easiest entry point.
Best for: Volume buyers, flexible travelers, short-haul Europe redemptions.
Singapore Airlines KrisFlyer — BEST FOR PREMIUM
SQ has no fuel surcharges and premium cabin value is stratospheric. If you can catch a Suites redemption, you're redeeming at $0.030–0.040+ per mile. That's a 5x markup on your buy price.
Best for: Premium cabin hunters, luxury travelers, long-haul Asia-Europe routing.
ANA Mileage Club — BEST KEPT SECRET
Buy miles at $0.0083–$0.010 per mile, access Star Alliance partners with no surcharges, and take advantage of 2 stopovers on round-trips. ANA's generosity is unmatched.
Best for: Budget-conscious travelers, stopover enthusiasts, North America routing.
The Game Plan
Step 1: Monitor Flying Blue's monthly promos, catch a 40,000-mile business class deal.
Step 2: Calculate: If that flight costs $3,500 cash and you bought at $0.0067/mile, your redemption CPM is ($3,500 ÷ 40,000 = $0.0875). That's a 13x markup. Book it.
Step 3: Diversify: 60% premium programs (SQ, Qatar), 30% flexible (Flying Blue, ANA), 10% experimental.
The Real-World Win
Buy 51,000 Flying Blue miles for $342 ($0.0067/mile). Two weeks later, catch a Paris→Tokyo business promo at 40,000 miles (cash price: $4,200). Redemption CPM: $0.105. Net value captured: $4,186 profit on a $342 buy.
That's not travel hacking. That's arbitrage.
The miles game isn't about redemptions. It's about buying power.