Will United report positive main cabin RASM growth in any quarter of H1 2026?

Basic Economy revenue +7% is the closest proxy to main cabin in the press release, and it grew. Combined with consolidated PRASM +7.4% and all regions positive PRASM, main cabin RASM was almost certainly positive in Q1 on a basic math basis. The market requires positive in either Q1 or Q2. Q1 appears resolved in the YES direction (pending explicit disclosure). Q2 is a backup — even if Q1 turned out narrowly negative, capacity discipline and continued premium/loyalty strength should keep main cabin RASM positive or near-positive in Q2. Probability ~82% YES.

A strict reading: the press release does not disclose 'main cabin RASM' as a distinct metric. UAL may define main cabin differently than Basic Economy — some airlines distinguish economy, economy plus, and basic economy. The 10-Q filing (typically 4-6 weeks post-earnings) should include detailed breakdowns. If main cabin excludes Basic Economy (i.e., 'economy' only), the metric could be narrowly negative if premium and Basic Economy captured all the growth. This is the non-trivial downside scenario. Probability ~80% reflects strong-but-not-certain positive signal.

The FY2025 main cabin -5% context is what set the baseline at 0.35. Q1 2026 represents a dramatic turn with all regions positive PRASM and Basic Economy +7%. Even with the narrowest possible main-cabin definition, growth in yield (+4.2%) and load factor (+2.4 pts) combined broad-based pricing power. For main cabin RASM to be negative, premium would need to be carrying all the growth while main cabin specifically declined — a pattern inconsistent with the all-regions-positive PRASM signal. Q2 adds another shot with continued discipline. Probability ~83% YES.

Market resolution requires UAL to explicitly report main cabin RASM growth as positive. If UAL continues the pattern of breaking out premium vs main cabin on the earnings call or in the 10-Q, and Q1 is implied positive based on Basic Economy +7% + regional PRASM strength, this resolves YES in the first window. Q2 provides a second shot. Main risk: UAL may not report main cabin RASM explicitly this quarter. Standard practice in airline reporting includes it at 10-Q. Probability ~80% YES.

The capacity discipline (5-pt cut) is a strong main cabin RASM tailwind — less supply chasing demand. Q2 is tracking for main cabin positive even if Q1 fell short. Q2 pre-tax margin compression expected but that's a cost effect, not RASM. Top-line revenue growth is durable. Probability ~78% reflecting Q1 implicit + Q2 forward capacity support.

Mechanical math: consolidated PRASM = weighted avg of premium + main cabin. Premium PRASM growth likely significantly above 7.4% (premium revenue +14% on presumably mid-single-digit capacity growth). If premium PRASM is ~10% and consolidated is 7.4%, main cabin PRASM math requires it to grow at ~5% (depending on mix weights). Positive main cabin RASM very likely. Probability ~82% YES.

All regions positive PRASM plus Basic Economy +7% = main cabin RASM very likely positive Q1. Q2 capacity discipline extends support. Probability ~80% YES.

Shift from baseline 0.35 reflects Q1 data. Main risk: UAL's main cabin definition may not include Basic Economy, so strict reading could fail. 10-Q clarity helps. ~78% YES.

Broad-based Q1 revenue strength across regions and fare tiers strongly implies main cabin RASM positive. Q2 capacity cut supports continuation. Probability ~80%.