What is the difference between a flight tracker and a delay predictor?
A flight tracker shows what is happening to a flight right now: status, gate and current delay. A delay predictor estimates the odds of a delay or cancellation before it happens, from how the airline, route, airport and departure time have performed in the past plus current weather and FAA conditions. Use a predictor when booking and planning, and a live tracker or your airline's app on the day of travel.
Will my flight be delayed?
No one can know for certain, but you can check the odds. Across US domestic flights from January 2023 to December 2025, 21.2% arrived 15 or more minutes late, about one in five. Your own risk depends on the airline, route, time of day, season and current weather and air traffic conditions. Enter your flight in DelayGuard for a free risk band (Low, Moderate, High or Very High). Premium and credits show the exact percentage and the full factor breakdown.
How accurate is AI flight delay prediction?
Flight delays are inherently noisy, so DelayGuard focuses on honest risk estimates rather than a headline score. The ML model, trained on 2023 to mid-2025 BTS data (nearly 4 million flights), uses only information available before departure and was tested on a later quarter of flights it never saw. Predictions made within 48 hours of departure are more accurate as live weather and FAA ground-delay data become available.
How far in advance can you predict a flight delay?
Free users can check delay risk up to 7 days ahead. Premium users can look up to 1 year in advance, which is useful for planning trips around historically high-risk periods (summer thunderstorm season, major holidays). Accuracy degrades beyond 2 weeks as weather data becomes unavailable.
What causes most US domestic flight delays?
BTS records a cause on delayed flights, including late-arriving aircraft, the airline's own operations, the national airspace system, weather, and security. The BTS extract behind these pages does not include those cause shares, so no percentage is shown.
Is it better to fly in the morning to avoid delays?
Yes. In BTS data for January 2023 to December 2025, 11.0% of US domestic flights scheduled before 8 AM arrived 15 or more minutes late, against 28.7% of flights scheduled after 8 PM. The aircraft has spent the night at the airport, so an early departure has no late inbound flight to wait for.
Which airlines have the best on-time performance?
Based on BTS data, Alaska Airlines, Delta Air Lines, and United Airlines consistently rank highest for on-time performance among major US carriers. Frontier and JetBlue show higher delay rates, particularly on congested routes. (Spirit Airlines historically shared this profile but ceased all operations on May 2, 2026.) Performance varies significantly by route and season.
Does weather always cause flight delays?
Weather is one cause BTS records on a delayed flight. The extract behind these pages does not include cause shares, so no weather percentage is shown. A prediction also uses the airline's history on that route and live FAA data.
Can I get compensation if my flight is delayed?
US domestic delays do not generally entitle passengers to cash compensation. Airlines must honor their published commitments for controllable disruptions, which may include meals or hotels. If your flight is canceled or significantly changed and you decline alternative travel, refund rights still apply. DelayGuard offers VisitorsCoverage and Insubuy insurance comparisons for planning ahead: check domestic-trip eligibility, trip-delay benefits and exclusions. Do not assume an already-known disruption is covered.
What is the difference between a delay and a cancellation?
A delay means your flight departs late but still operates. A cancellation means the flight doesn't operate at all. Cancellations are more likely during severe weather events. High Very High Risk scores on DelayGuard correlate with elevated cancellation probability, though the current model specifically predicts departure delays of 15+ minutes.
Which airline cancels the most flights?
Based on BTS data for 2024–2025 (14 million domestic flights), Frontier Airlines has the highest cancellation rate among major US carriers at 2.05%, followed by Spirit Airlines (1.74%) and American Airlines (1.68%). Delta Air Lines has the lowest cancellation rate of the major carriers at 1.00%, followed by Southwest at 0.84%. DelayGuard shows the historical cancellation rate for your specific route and airline on every prediction result.
What is a normal flight cancellation rate?
The US domestic average cancellation rate was approximately 1.4% in 2024–2025, based on BTS data covering 14 million scheduled flights. In practical terms, roughly 1 in 71 US domestic flights is cancelled. Rates vary significantly by airline (0.84%–2.05% for major carriers), route, season, and month. Winter months and periods with severe weather events can push cancellation rates 2–3× above the annual average.
How is cancellation risk different from delay risk?
Delay risk measures the probability your flight departs 15+ minutes late but still operates. Cancellation risk measures the historical probability the flight does not operate at all. DelayGuard's AI model predicts delay probability in real time; the cancellation rate shown on results is a historical baseline from BTS data, broken down by your specific airline, route, and departure month. The two risks are related — routes with high delay rates tend to have elevated cancellation rates during severe weather — but they are calculated differently.
Which routes have the highest cancellation rates?
Routes through congested northeastern hubs tend to have the highest cancellation rates. Based on BTS 2024–2025 data, routes like ORD–ATL and DFW–LAX see cancellation rates above 1.4%, partly driven by weather exposure and operational complexity. Routes between major sunny-weather airports (e.g. LAX–BOS, PHX–LAS) tend to have lower cancellation rates, often below 0.5%. DelayGuard displays the historical cancellation rate for your specific origin–destination pair and airline on every prediction.