A short, opinionated breakdown of how the four largest U.S. carriers reward miles, what their elite tiers really mean, and where the value cliff sits. We do not earn referral commission on any programme — this is a reference, not a recommendation.
SkyMiles dropped fixed award charts in 2015. Today award prices are dynamic — they track cash fare. Earn rate is revenue-based: 5 miles per $1 spent (general member), scaling to 11 mi/$1 at top elite. The miles themselves are worth roughly 1.2¢ each on a long-haul economy redemption.
AAdvantage is the oldest U.S. mileage programme (1981) and one of the more flexible. American kept partial fixed-chart pricing on partners — Cathay Pacific, Qatar, JAL — which makes it one of the better programmes for long-haul premium-cabin redemptions.
United also moved to dynamic pricing on its own metal but holds award charts for Star Alliance partners. Star Alliance is the largest of the three big alliances, so MileagePlus has very wide partner reach — Lufthansa, ANA, Singapore, Air Canada, Avianca, Turkish.
Southwest is the simplest programme by design. Award price is a fixed fraction of the cash fare — about 1.4¢ per point regardless of where or when you book. No award charts, no tier-based booking advantage, no fuel surcharges. Trade-off: no premium cabin and no international long-haul.
Earn miles where you fly most — every U.S. domestic carrier credits roughly the same 5 mi/$1 base rate. Burn miles where the partner award charts are best. The match-up nobody mentions: credit-card sign-up bonuses are still where 60–80 % of U.S. mileage portfolios actually come from. The fly-and-earn earn rate is too low to fill a long-haul business-class redemption purely from flying.
Two questions to ask before choosing a programme:
If you fly Hawaii routes a lot, also look at Hawaiian Airlines HawaiianMiles — the inter-island award rate is a bargain at 7,500 points each way.