How to Find Out Why Your Flight Was Cancelled & What to Do Next
EXPERT-VERIFIED GUIDE
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- Reviewed against UK261, EU261 regulations.
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- Every figure cites a primary legal source.
- Updated whenever the law or airline policy changes.
Updated:
19 minutes read
To find out why your flight was cancelled, check the airline's app, website, and any text or email notice first.
Then, confirm the cause with an independent flight status tracker for cancellations (AirAdvisor, FlightAware, FlightRadar24) and your airport's website.
Widespread cancellations are usually caused by weather, air traffic control (ATC) restrictions, or strikes, which often reach news and social media before the airline confirms them. Always cross-check the reason against at least two sources.
The cause is not just a detail. It decides whether you can claim up to £520 (€600) in compensation, so it is worth pinning down.
Key takeaways
- The airline and airport are usually the two best sources for finding out why your flight was cancelled. If you're at the airport, ask gate staff immediately; otherwise, check the airline's app/site first.
- Cross-check at least two sources because the airline's initial explanation may be vague.
- Ask the airline for the specific cancellation reason and IATA delay code in writing if the cause isn't clear.
- Even under extraordinary circumstances you can still have rights to re-routing or a refund, meals, and accommodation.
5 ways to find out why your flight was cancelled
Below are the most reliable sources to check, in the order you should check them. We recommend verifying any reason against at least two sources, since the stated cause determines whether or not you have a valid compensation claim.
How to ask the airline for the reason in writing
Vague explanations won’t cut it, so challenge the airline to provide written confirmation of the cancellation reason. Here’s a sample of what you can send:
“Please confirm in writing the specific reason why flight [FLIGHT NUMBER] on [DATE] was cancelled.
Please also provide the IATA delay code or other internal disruption code recorded for the cancellation, if available.
I require this information to understand my passenger rights and determine whether the cancellation is eligible for compensation.”
Regardless of the airline’s response, keep it until your claim is resolved. Also, if you have cancellation reason messages in your airline app, take screenshots, and if there’s an email, keep that too.
Check your airport
When an airport is experiencing an unusually high number of flight disruptions, it will often post about it on its official website. The reason will be clearly stated and is most commonly due to weather or staffing issues, including strikes and air traffic control (ATC) restrictions.
Try flight-tracking websites
Independent flight tracking sites can tell you whether your flight has been cancelled, though rarely why. If you're not using an app with push notifications, check your status before you leave for the airport.
AirAdvisor's flight disruption tracker pulls flight data from multiple reliable sources and updates it every 1–2 hours, making it one of the more current sources available.
Flightstats, FlightRadar24, and FlightAware are also reliable. Google works if you have your flight number and need a quick confirmation, but it won't tell you what caused the disruption.
Flight-tracking sites are most useful for seeing what planes are in the air at any given time. Look for planes circling your departure airport, which can indicate air traffic control issues that ripple through and cause cancellations further down the schedule.
A plane sitting for an extended time at a previous destination can indicate a security issue, a mechanical problem, or a crew shortage.
You may not always be able to confirm the exact reason from a tracker, but you can make reasonable assumptions. These are useful when an airline is being vague about why a cancellation occurred.
Social media and news outlets
When flights are cancelled because of large-scale events such as airport staff or air traffic control strikes, severe weather, or widespread technical issues, the story often breaks on news and social media before the airline notifies affected passengers.
Following your frequently used airlines and major news channels (BBC, Reuters, Bloomberg) means that when a story about large-scale cancellations is reported, the airline will have difficulty denying or obscuring the cause.
Check official ATC and weather sources
When a cancellation is blamed on air traffic control or weather, you can confirm it independently from the authorities that actually manage the airspace. These sources are neutral, timestamped, and hard for an airline to contradict later.
- European airspace: Eurocontrol's public Network Operations Portal publishes the current network situation and the flow restrictions (ATC capacity, staffing, weather) causing delays across Europe.
- Weather: aviation weather reports (METARs and TAFs) and your national weather service show whether conditions at the airport were genuinely severe at the time, or mild enough to question a "weather" excuse.
If none of these show a restriction or severe weather at your departure airport when your flight was cancelled, a "weather" or "ATC" explanation is worth challenging.
Find the airline's official reason: IATA delay codes explained
Airlines log a standardised reason for every disrupted flight using IATA delay codes, a numbered system that assigns the cause.
You rarely see the code on your booking, but knowing the categories helps you read a vague explanation, and each family points towards whether compensation is likely.
| Code family | Typical cause | Compensation usually? |
1x | Passengers and baggage handling | Airline's fault, likely owed |
3x | Aircraft and ramp handling (cleaning, loading) | Airline's fault, likely owed |
4x | Technical and aircraft faults (maintenance) | Airline's fault, likely owed |
6x | Flight operations and crewing (crew shortage) | Airline's fault, likely owed |
7x | Weather (for example code 75, de-icing) | Often extraordinary, verify |
8x | ATC, airport, and government authorities | Often extraordinary, verify |
9x | Reactionary (knock-on from an earlier delay) | Depends on the original cause |
Code 9x is the one to watch: a knock-on cancellation is only extraordinary if the delay that started the chain was extraordinary.
If you experience a flight cancelled due to a crew shortage on the aircraft’s previous flight, that root cause is the airline's responsibility.
How to see the code or official remark
Some airlines show the reason directly. United, for example, states it at the top of the flight details in its app. For other carriers, a paid ExpertFlyer subscription (around $10 a month) can reveal the airline's operational remarks: log in, open Flight Status, enter your flight, and select View additional comments. Coverage varies by airline, and the data is usually only available for flights within about a week, so check soon after the disruption.
If you cannot find the code, ask the airline for the reason for cancellation in writing. A refusal, or a vague "operational reasons" reply, is itself useful evidence when you claim.
How to get ahead of a cancelled flight
Knowing the reason as early as possible gives you more options, including the chance to re-book before other passengers do. Two tools are worth having set up before you fly.
Google Flights
Since 2018, Google Flights, in conjunction with Google Assistant, has been able to alert users to flight disruptions, sometimes hours before the official communication from the airline.
When multiple flights from the same airport are cancelled simultaneously, acting quickly on that lead time can make a real difference to how long you end up stranded.
Airline apps
Download your airline's app before you travel and enable push notifications. Many airlines use their apps as the first point of contact for customers, which means you may receive word of a cancellation before other passengers who have not downloaded it.
Common reasons why flights get cancelled
The reasons for flight cancellations are varied. The most common include:
- Extreme weather. Conditions that make it unsafe to operate.
- Air traffic control restrictions. ATC can limit how many flights can take off or land within a given period.
- Industrial action. Strikes by airline staff, ATC workers, baggage handlers, or ground crews can cancel flights quickly and at scale.
- Economics. Some airlines will cancel a flight if not enough seats have been sold to make the route viable.
- Aircraft issues. Mechanical problems, manufacturing defects, damage from a previous flight (including bird or lightning strikes), or a plane stranded at another airport.
Why the cancellation reason matters for your claim
Your rights under UK261 and your EU261 passenger rights mean airlines are required to compensate passengers for cancellations that were within their control.
If the reason falls into the category of extraordinary circumstances, such as genuine extreme weather, political instability, or third-party ATC strikes, compensation may not be owed. That’s how delay compensation works, too.
The reason your flight was cancelled is the difference between a valid claim and one that’s denied. If it was something the airline controlled, like the crew, a technical fault, or vague ‘operational reasons,’ you're very likely owed up to £520 under UK261. If it was truly outside their control, you won't get the cash, but you're still owed a refund or a re-routing and care while you wait.
— Anton Radchenko, Founder & CEO, AirAdvisor
What to do once you know the reason
Knowing why your flight was cancelled is the starting point, not the end point. If the reason was within the airline's control and you received fewer than 14 days’ notice of the cancellation, you may be entitled to compensation. Here is what to do next:
- Save your boarding pass and booking confirmation.
- Note your actual arrival time at your final destination.
- Get the cancellation reason in writing if you can.
- Check your eligibility for cancelled flight compensation.
- Submit your claim, either directly to the airline or through AirAdvisor on a no-win, no-fee basis.
For UK-departing flights, you have up to 6 years to submit a claim. For EU departures, the claim window depends on the EU country.
Even if it's not the airline's fault, you're still owed care
No matter the reason for the cancelled flight, airlines must still offer the option of either a new flight or a full refund. It’s completely separate from compensation, as is your right to care during the airport delay.
While you wait for a replacement flight, you are also entitled to reasonable meals and refreshments, communication costs, and hotel accommodation and transport if an overnight stay away from home is necessary.
Frequently asked questions
What if the airline refuses to tell me why my flight was cancelled?
You’re entitled to a reason. Ask in writing and keep a record of the response, or lack of one. If the airline withholds the reason or gives a vague explanation like "operational reasons," AirAdvisor can investigate on your behalf as part of the claims process. A pattern of vague responses is itself a useful indicator that the cause may be one the airline would rather not disclose.
Can I see the IATA delay code for my flight?
Not usually on your booking. Airlines record a delay code internally, and some, such as United, display the reason in their app. Otherwise, a paid tool like ExpertFlyer can show the airline's operational remarks, or you can request the specific reason in writing. The code family tells you whether the cause was within the airline's control.
Do these rules apply to flights in the US?
US flights are covered by Department of Transportation rules. There’s no provision for cash compensation, but if the airline cancels your flight and you reject its alternative transportation, you're entitled to a refund; additional rebooking, meal and hotel commitments depend on the airline and circumstances. Fixed cash compensation only applies to UK and EU departures and UK and EU arrivals on a UK or EU airline.
Is a crew shortage an extraordinary circumstance?
Generally, no. Hiring and scheduling is something the airline controls directly. The only caveat is if the shortage is caused by an external event, the extraordinary circumstance claim may apply and exempt the airline from paying compensation.
Does bad weather always mean no compensation?
No. Although there’s typically no compensation when weather directly makes your flight unsafe to operate, it’s not black and white. For example, if weather caused an initial problem, but the eventual cancellation resulted from something within the airline's control, compensation is back on the table.
Disclaimer: The screenshots and user interface designs featured in this article are illustrative mockups created for educational and demonstration purposes. Brand names, logos, flight numbers, and interfaces (including SkyTrack, Skyscanner, Google Flights, and British Airways) are used conceptually to simulate real-world scenarios and do not represent actual real-time flight data, live system notifications, or official endorsements by the companies mentioned.
Author:
Amy LancelotteJob/Position: Senior Writer & Content Strategist
Amy Lancelotte is a Senior Content Writer and editorial contributor at AirAdvisor with over seven years of experience producing research-based articles for international audiences. Her work focuses on travel, aviation, and air passenger rights, with an emphasis on factual accuracy, verified data, and clear, reader-first explanations.
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