The 10 European airports with the most delays in 2026
10 April 2026
The 10 European airports with the most delays in 2026
If you travel frequently in Europe, you know well that not all airports are equal when it comes to punctuality. Some airports accumulate systematic delays due to congestion, unfavourable weather or infrastructure limitations. In this article we analyse the 10 European airports with the most ATFM delays (Air Traffic Flow Management), based on EUROCONTROL data that FlightGuard integrates into its risk analysis.
What ATFM delays are
Before diving into the ranking, it’s important to understand what we’re measuring. ATFM delays are those imposed by EUROCONTROL when air traffic exceeds the available capacity in a given airspace sector or airport. These are not delays caused by the airline or weather (though weather can reduce capacity), but by traffic flow management at a European level.
These delays are measured in minutes per flight and represent a reliable indicator of an airport’s congestion level.
The 2026 ranking
1. London Heathrow (LHR)
Heathrow is the busiest airport in Europe with over 80 million passengers a year, but operates with just two runways. This combination creates a permanent bottleneck. A thunderstorm or a bit of fog is enough to generate cascading delays. Average ATFM delays regularly exceed 15 minutes per flight during summer months.
Main causes: limited runway capacity, weather (winter fog, summer thunderstorms), traffic volume.
2. Paris Charles de Gaulle (CDG)
CDG handles an enormous volume of both point-to-point and connecting traffic. The four-runway system helps, but the complexity of operations and periodic French ATC staff strikes make it one of the airports with the most delays in Europe.
Main causes: ATC strikes, hub traffic, winter weather.
3. Istanbul Airport (IST)
Istanbul’s new mega-airport has huge capacity, but its position as a bridge between Europe and Asia generates extremely intense traffic. Night operations and the complexity of Turkish airspace contribute to delays.
Main causes: traffic volume, airspace complexity, variable weather conditions.
4. Frankfurt (FRA)
Frankfurt is Lufthansa’s main hub and one of the most connected airports in the world. Its operations are limited by night noise restrictions and a complex airspace shared with military bases.
Main causes: night restrictions, hub traffic, fog in the Main valley.
5. Amsterdam Schiphol (AMS)
Schiphol is under constant pressure from environmental restrictions imposed by the Dutch government, which has reduced the maximum number of annual flights. The six runways aren’t enough to handle demand during peak periods, and strong wind from the North Sea complicates operations.
Main causes: environmental restrictions, wind, reduced capacity.
6. Barcelona El Prat (BCN)
Barcelona suffers from a structural problem: the main runway and secondary runway intersect, limiting operational capacity. The explosion of tourism and low-cost traffic has pushed the airport close to saturation.
Main causes: runway configuration, seasonal tourist volume, slot saturation.
7. Rome Fiumicino (FCO)
Fiumicino is Italy’s main airport and ITA Airways’ hub. Ongoing expansion works improve long-term prospects, but in the meantime create disruption. Italian transport strikes add an additional risk factor.
Main causes: infrastructure works, strikes, summer seasonal traffic.
8. Madrid Barajas (MAD)
Madrid has four runways and good capacity, but the strong traffic growth — driven by Iberia’s recovery and the boom of routes to Latin America — is putting the system under pressure. Summer thunderstorms on the Meseta can block operations for hours.
Main causes: summer thunderstorms, traffic growth, hub complexity.
9. Munich (MUC)
Munich is Lufthansa’s second hub and one of the best-managed airports in Europe, but it’s not immune to delays. Autumn and winter fog on the Bavarian plain is a recurring problem, and connecting traffic with long-haul flights creates congestion peaks.
Main causes: seasonal fog, hub traffic, winter de-icing.
10. Milan Malpensa (MXP)
Malpensa has seen strong growth thanks to low-cost carriers and intercontinental flights. Its location in the Po Valley makes it vulnerable to thick fog in winter months, which can drastically reduce operational capacity.
Main causes: Po Valley fog, traffic growth, access infrastructure.
How FlightGuard monitors these airports
FlightGuard collects data on ATC delays for each airport using EUROCONTROL data, updated every 6 hours. This data feeds into the risk score calculation as one of the 9 analysis factors (weight 12%).
But we don’t stop at ATC delays. For each airport we also monitor:
- Weather forecasts updated every 30 minutes
- Active NOTAMs (runway closures, works, restrictions)
- Strikes and disruptions in real time
You can check the dedicated page for each airport to see updated data and delay history.
Tips for flying from congested airports
If you’re departing from one of the airports in this ranking, here’s what you can do:
- Choose morning flights: delays tend to accumulate during the day. The first flight of the morning is almost always the most punctual
- Avoid tight connections: if transiting through a congested hub, allow at least 2 hours between flights
- Monitor the risk: use FlightGuard to check the specific situation of your flight in the days before departure
- Activate alerts: with FlightGuard’s free email alerts, you’ll receive a notification if the risk for your flight changes
Check the risk of your flight
Flying from one of these airports? Don’t rely on luck. Enter your flight number on FlightGuard and find out in seconds the risk level based on up-to-date data. It’s free, no registration required.