Aspen Airport Closes ~1 Month From April 23; Denver Alternative Airports Same Period Business Jet Movements Down YoY — but Conclusion Needs to Consider Seasonality

Colorado Aspen/Pitkin airport (KASE) closed ~1 month from April 23, 2026 for runway maintenance (off-season periodic maintenance closure is known practice for this airport). In theory, Denver area KAPA (Centennial Airport) and KBJC (Rocky Mountain Metropolitan Airport) should absorb some diversion demand, but AviGo data shows April 23 – May 1 two-airport combined ~941 movements vs. ~1,606 in same period of 2025 — YoY −41%; also notable decline vs. this month's first three weeks daily average. However note: (1) comparison window just ~9 days, sample size small, conclusion robustness limited; (2) late April to early May coincides with traditional low season after Aspen ski season ends — diversion demand during KASE closure was inherently limited; (3) Denver area airports' movement decline may include seasonal factors — should not be simply derived as regional demand overall weakness. Operators should still focus on short-term regional demand changes, but need longer time windows and seasonally adjusted data for further judgment. Confidence ★★★ (KG + AviGo dual cross-verification; causal inference requires caution).