Denver Airport: 323 Delays, 15 Cancellations April 2026

Denver International Airport (DEN) recorded 323 delays and 15 cancellations on April 4, 2026 — one of the most disrupted airports in the US outside Chicago — with United Airlines logging 126 delays and SkyWest Airlines accounting for 10 of the 15 total cancellations.

Context and Background

Denver stands as a critical connecting hub for the western and central United States. When Winter Storm Kadence forced mass groundings at Chicago O'Hare — the nation's hardest-hit airport — connecting banks at DEN collapsed, creating a compounding delay surge across Southwest, United, and SkyWest's high-frequency rotations.

FlightAware data shows DEN as the second-worst airport by total disruption count in the US on April 4, trailing only O'Hare. International extensions were also impacted — Canadian, Mexican, and Iceland-linked connections through DEN experienced visible delays, confirming how a major US hub disruption propagates globally.

Airline-Level Breakdown at DEN

Airline	Cancellations	Delays
United Airlines	1	126
Southwest Airlines	3	94
SkyWest Airlines	10	59
Frontier Airlines	0	18
Delta Air Lines	0	11
American Airlines	1	6
Air Canada	0	2
Alaska Airlines	0	1

Key routes impacted: Chicago O'Hare (ORD), Atlanta (ATL), Los Angeles (LAX), San Francisco (SFO), Las Vegas (LAS), Salt Lake City (SLC), Casper (CPR), Rapid City (RAP), and international links to Canada and Mexico.

What Travelers Get (Key Facts at DEN)

323 total delays and 15 cancellations at Denver International on April 4
United Airlines' 126 delays represent the highest raw delay count of any single airline at any single airport in today's data
SkyWest's 10 cancellations represent the largest cancellation footprint of any carrier at DEN
Regional airports — Casper (CPR) and Rapid City (RAP) — also saw cancellations despite lower traffic volumes
International routes to Canada, Mexico, and Iceland-connected legs all experienced delays

What This Means for Travelers

If you are transiting through DEN today to connect further east — especially to ORD, ATL, or LGA — do not board without confirming your connecting flight is operational. Use United's app or Southwest's flight tracker to verify gate-level status in real time.

SkyWest passengers — who fly under the United Express and Delta Connection banners — should check with United or Delta directly for rebooking options, as SkyWest does not independently manage customer rebooking on weather waivers.

FAQ: Denver International Airport Disruptions April 2026

Q: How many flights were delayed at Denver International on April 4, 2026? 323 delays and 15 cancellations. United Airlines had the most delays (126), and SkyWest Airlines had the most cancellations (10).

Q: Why does Denver experience so many delays when the storm is in the Northern Plains? Denver is a major western US hub for United and Southwest. Inbound aircraft from the Northern Plains and Great Lakes arrive late or not at all, breaking outbound rotation schedules across DEN's full departure bank.

Q: How do SkyWest passengers rebook during weather disruptions? SkyWest operates under United Express and Delta Connection banners. Contact United Airlines or Delta Air Lines directly — depending on which carrier's code appears on your ticket — to access weather waiver rebooking.

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Disclaimer: Disruption data sourced from FlightAware, subject to change at any time. Always verify your flight status directly with your airline before traveling.