How is airline on-time performance calculated?

The US Department of Transportation (DOT) counts a flight as on-time if it arrives within 15 minutes of its scheduled arrival time. On-time percentage is the share of operated flights meeting that threshold, excluding cancellations.

Which airline has the best on-time performance?

Rankings shift monthly. Historically, Delta Air Lines, Alaska Airlines, and Hawaiian Airlines consistently score above 80% on-time for US domestic operations. Check the live ranking table for the current months leader.

What is a good on-time arrival rate for an airline?

Anything above 80% is generally considered good in the industry. Top performers regularly exceed 85%. Below 75% warrants concern, especially if cancellation rates are also elevated.

Does on-time performance vary by season?

Yes significantly. Winter (December–February) and summer peak season (June–August) see the most delays and cancellations due to weather. Spring typically offers the best on-time performance industry-wide.

How often is on-time data updated?

DOT publishes official monthly reports with a ~45-day lag. FlightAware.bot supplements this with real-time operational data so you can see rolling 30-day performance for any airline, updated daily.

Airline On-Time Statistics

Data through: May 2026

Choosing an airline that runs on time can make the difference between a smooth trip and a missed connection. FlightAware.bot aggregates US Department of Transportation data with live operational feeds to give you the most current airline punctuality rankings available — updated daily.

How On-Time Performance Is Measured

The DOT Bureau of Transportation Statistics (BTS) requires US carriers operating more than one percent of domestic scheduled-service passenger revenues to report detailed on-time data monthly. A flight is officially counted as "on-time" if the aircraft pushes back from the gate within 15 minutes of its scheduled departure time and arrives at the destination gate within 15 minutes of its scheduled arrival.

FlightAware.bot's rolling 30-day metric uses the same 15-minute threshold applied to actual gate-in times from ADS-B and ACARS data, giving you near-real-time performance figures weeks before DOT publishes its official report.

Key Metrics Explained

On-Time Arrival Rate (%) — Percentage of flights arriving within 15 minutes of schedule. The headline metric most travellers care about.
Cancellation Rate (%) — Percentage of scheduled flights that were cancelled. High cancellation rates often signal operational instability.
Average Delay (minutes) — Average minutes late for delayed flights only. A low average here means delays, when they happen, are short.
Tarmac Delay Rate — Percentage of flights where passengers sat on the tarmac more than 3 hours — a DOT enforcement threshold.
Mishandled Bags (per 1,000) — Bags lost, delayed, damaged, or pilfered per thousand enplaned passengers.

Factors That Affect Airline Punctuality

Airlines don't operate in a vacuum. Network structure, hub concentration, aircraft age, crew scheduling practices, and the geographic locations they serve all influence on-time performance. An airline concentrated in weather-prone hubs like Chicago O'Hare or New York will face structural headwinds that a Hawaii-focused carrier avoids. Point-to-point airlines with shorter average stage lengths also tend to recover from delays faster than hub-and-spoke carriers with complex connection banks.

Frequently Asked Questions

How is airline on-time performance calculated?: The US Department of Transportation (DOT) counts a flight as on-time if it arrives within 15 minutes of its scheduled arrival time. On-time percentage is the share of operated flights meeting that threshold, excluding cancellations.
Which airline has the best on-time performance?: Rankings shift monthly. Historically, Delta Air Lines, Alaska Airlines, and Hawaiian Airlines consistently score above 80% on-time for US domestic operations. Check the live ranking table for the current months leader.
What is a good on-time arrival rate for an airline?: Anything above 80% is generally considered good in the industry. Top performers regularly exceed 85%. Below 75% warrants concern, especially if cancellation rates are also elevated.
Does on-time performance vary by season?: Yes significantly. Winter (December–February) and summer peak season (June–August) see the most delays and cancellations due to weather. Spring typically offers the best on-time performance industry-wide.
How often is on-time data updated?: DOT publishes official monthly reports with a ~45-day lag. FlightAware.bot supplements this with real-time operational data so you can see rolling 30-day performance for any airline, updated daily.