Weekly At-Risk Flights Report: Week of April 11, 2026
The week of April 11, 2026 presents some surprises in the analysis of European and international flight risks. FlightGuard data shows a complex landscape with intercontinental airports dominating the list of most problematic hubs.
Riskiest Airports: Houston Takes the Lead
George Bush Intercontinental Airport in Houston leads the ranking with a risk score of 49.4 across 85 monitored routes. This American hub is experiencing significant operational problems, likely related to adverse weather conditions typical of the Texas spring season and air traffic congestion.
In second place we find Heraklion International Airport Nikos Kazantzakis with a score of 43.8 across 55 routes. The Cretan airport is facing typical pre-summer season challenges, with increased tourist traffic and possible infrastructure limitations.
Asian Airports in Difficulty
Two major Asian hubs complete the podium:
Both Japanese airports are probably facing seasonal weather-related problems and air traffic density in one of the world’s busiest regions.
Most Problematic Routes
The riskiest routes of the week reveal interesting patterns:
UK Connections
Three of the top four riskiest routes involve British airports:
- DUB -> STN (Dublin-Stansted): 49.4
- IAH -> LHR (Houston-Heathrow): 49.4
- SCL -> LHR (Santiago-Heathrow): 49.4
- FCO -> LGW (Rome Fiumicino-Gatwick): 49.0
This pattern suggests systemic problems in London airports, probably due to:
- Air traffic control congestion
- Adverse weather conditions over Western Europe
- Staff shortages at British airports
Mediterranean Routes
Routes to Mediterranean destinations also show criticalities:
- CPH -> AGP (Copenhagen-Málaga): 44.9
- HER -> LGW (Heraklion-Gatwick): 43.8
Italian Airports: Mixed Situation
Among the riskiest airports we find two Italian hubs:
- Florence Peretola Airport: 38.6 (81 routes)
- The BRI -> FCO route (Bari-Fiumicino) with a score of 42.9
Rome Fiumicino Airport appears in both the airport and problematic routes lists, signaling possible operational difficulties at the capital’s hub.
Main Causes of Disruptions
Weather Factors
European spring often brings unstable weather conditions, with storms and strong winds that can cause significant delays.
Traffic Congestion
The seasonal traffic increase to Mediterranean tourist destinations is putting pressure on many European airports.
Infrastructure Problems
Some airports, especially smaller ones like Strasbourg and Region of Murcia, may have capacity limitations that cause cascading delays.
Practical Tips for Travelers
Before Travel
- Constantly monitor your flight status
- Book morning flights when possible - statistically less prone to delays
- Consider alternative airports for destinations with multiple options
Delay Management
- Always carry updated travel documents
- Download airline apps for real-time updates
- Allow extra time for connections, especially to/from riskiest airports
Passenger Rights
Remember your rights in case of delays:
- Compensation up to €600 for delays over 3 hours
- Free assistance (meals, accommodation if necessary)
- Full refund in case of cancellation
Forecasts for Coming Weeks
With the approach of summer season, expect:
- Increased traffic to Mediterranean destinations
- Possible strikes by airport personnel
- Greater pressure on European hub airports
Specific Recommendations
For Flights to/from Houston IAH
Maximum attention for international connections - consider direct flights when possible.
For Greek Destinations
Flights to Heraklion may experience delays - plan accordingly.
UK Connections
Always check last-minute updates for flights to London.
Continuous Monitoring
The air traffic situation is in constant evolution. FlightGuard continues to monitor all major airports and routes to provide travelers with the most updated information on flight risks.
Sources
All data presented in this report is based on FlightGuard’s proprietary analysis of delays, cancellations and operational risk factors. For more details on methodology: FlightGuard Sources.
Want to know if your next flight is at risk? Check your flight risk on FlightGuard.
