- Flight Disruptions
- Denver International Airport disruption causes 231 delays and 5 cancellations for Southwest and United
Denver International Airport disruption causes 231 delays and 5 cancellations for Southwest and United
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Checked by Alice Mariscotti-Wyatt
Last updated on June 22, 2026
236
Affected flights
1
Affected airports
2
Affected airlines
Disruption overview
A major disruption at Denver International Airport (DEN) on 18 June 2026 left Southwest Airlines and United Airlines passengers dealing with 5 cancellations and 231 delays. Because Denver is a key hub for both carriers, the problems quickly spread beyond Colorado, causing missed connections and longer waits on routes across the United States and on services to Canada, Mexico, Puerto Rico, and Hawaii. The root cause still hasn't been clearly identified, so it's not yet clear whether compensation applies. Passengers should keep checking flight status, ask their airline about rebooking or care, and can use AirHelp's free flight checker to understand what may apply.
Passengers affected by this flight disruption may be eligible for compensation of up to US$650 under passenger rights regulations. Eligibility depends on the circumstances of the disruption.
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Disruption details
Passengers traveling through Denver International Airport (DEN) on 18 June 2026 faced widespread disruption after operational problems hit Southwest Airlines and United Airlines, leading to 5 cancellations and 231 delays in a single day.
For passengers, this meant missed connections, longer waits at the gate, and growing uncertainty around onward journeys. Because Denver is a major hub for both airlines, disruption in Colorado quickly started affecting flights far beyond the airport itself.
The breakdown looked like this:
Southwest Airlines canceled 4 flights and delayed 149.
United Airlines canceled 1 flight and delayed 82.
In total, at least 236 flights were affected at Denver International Airport.
The immediate problems were centered in Denver, but the ripple effect didn't stay there. Aircraft and crews delayed in Colorado couldn't reach their next departures on time, creating secondary delays at major US airports including Chicago, Atlanta, Los Angeles, Dallas, Boston, Seattle, and Miami.
Regional routes were also caught up, with disruption reaching cities such as Aspen, Bozeman, and Wichita. Flights linking Denver with Vancouver, Montreal, Cancun, San Juan, and Honolulu were also vulnerable as planes and crews ended up out of position across the network.
Travelers reported long tarmac holds and gate shortages as airlines worked through the backlog. Even with only a handful of cancellations, hundreds of late departures at a busy hub can quickly turn into a much bigger problem for people trying to make onward connections.
Airport ground-control teams and both airlines said they were working together to clear queues and reposition aircraft. That effort was still ongoing, and schedule adjustments were expected to continue until operations stabilized.
There was no confirmed end time for the disruption, and more delays on 19 June 2026 remained possible. If you're due to fly through Denver, it's worth staying flexible, checking your airline's app regularly, and speaking to customer service before heading to the airport.
What's less clear is what caused the breakdown. The issue was described only as an operational problem, with no confirmed link to weather, strike action, or a technical fault. That means whether compensation applies will depend on what ultimately caused the disruption and the rules attached to your route.
Even when compensation isn't certain, you may still be entitled to help from your airline, including rebooking or a refund, plus food, drinks, or accommodation if the delay becomes serious or runs overnight. If your Southwest Airlines or United Airlines flight was affected, you can use AirHelp's free flight checker to see what rights may apply to your journey.
Know your rights
These are your air passenger rights
When your flight's disrupted, you have rights. Most passenger protection laws cover the following:
Compensation
Good passenger rights ensure passengers get fairly compensated for delays and cancellations. Try our compensation check and find out how much money we can get you.
Rerouting or refund
If your flight is canceled, your airline must provide an alternative. Some laws say you can choose a full refund instead.
Food and essential care
Providing food and drinks is a basic right under many regulations. Typically after a delay of a few hours.
Accommodation
Some passenger rights say the airline must provide accommodation when your journey is delayed overnight.
This advice is provided to help you if your flight is delayed or canceled. However, the exact care and compensation you are entitled to will depend on your specific circumstances and flight. Always follow the directions of your airline, particularly with regard to check-in and boarding times.
Quick facts
Summary
Disruption
Delays and Cancellations
Cause
Other
Status
Current disruption
Compensation
May qualify for compensation
Flights affected
236
Airlines affected
Southwest Airlines, United Airlines
Airports affected
Denver International Airport
Cities affected
Denver, Chicago, Indianapolis, Tucson, Dallas, Boston, Atlanta, Los Angeles, Las Vegas, Orlando, Minneapolis, Philadelphia, Phoenix, Seattle, San Francisco, Portland, Salt Lake City, San Diego, Miami, Vancouver, Montreal, Cancun, Anchorage, Honolulu, San Juan, Aspen, Bozeman, Spokane, Grand Junction, Casper, Wichita, Albuquerque, El Paso, Richmond, Pittsburgh, Jacksonville, Columbus, Nashville, Austin, Sacramento, Kansas City, Milwaukee, Tulsa
Countries affected
United States, Canada, Mexico, Puerto Rico
Start date
2026-06-18
Checked by
Alice Mariscotti-Wyatt
Date updated
June 22, 2026
What to do if your flight is delayed, canceled, or overbooked
If you're traveling to, from, or within the European Union, here's what you should do when you experience a disruption.
Gather evidence that your flight was delayed, canceled, or overbooked.
Get the airline to provide written confirmation of the disruption and the reason behind it.
Request an alternative flight to your destination — or a refund if you no longer wish to travel.
Make a note of the arrival time at your final destination.
Ask the airline to provide vouchers for meals and refreshments.
Avoid signing documents or accepting offers that may waive your passenger rights.
If an overnight stay is required, ask the airline to provide accommodation.
Save receipts for any additional expenses caused by the disruption.
