About FlightDelayBoard

Your source for historical flight delay statistics across US domestic airlines and airports, powered by official DOT Bureau of Transportation Statistics data.

Our Mission

FlightDelayBoard was built to give travelers a clear, unbiased view of US airline and airport on-time performance. Too many travelers make booking decisions without knowing which airlines are consistently late, which airports are delay hotspots, or what time of day minimizes their risk of a delayed flight.

We aggregate and present historical on-time performance data from the US Department of Transportation (DOT) Bureau of Transportation Statistics (BTS), covering all major US domestic carriers and airports. Our goal is simple: help you fly smarter.

Data Source

All delay statistics on FlightDelayBoard come from the DOT Bureau of Transportation Statistics On-Time Performance (OTP) database. This is the official government dataset that US carriers are required to report to — covering every domestic flight operated by carriers with at least 1% of total domestic scheduled service.

10+

Major Airlines Tracked

100+

Airports Covered

Quarterly

Data Updates

Airlines We Track

Delta Air Lines

Consistently top on-time performer

Alaska Airlines

Strong reliability, West Coast focus

United Airlines

Major hub network, improving performance

American Airlines

Largest US carrier by fleet size

Southwest Airlines

Point-to-point model, no hubs

JetBlue Airways

Focus carrier, Northeast & Florida

Spirit Airlines

Ultra-low-cost, higher delay rates

Frontier Airlines

Ultra-low-cost, leisure routes

Major Airports Covered

ATL

Hartsfield-Jackson Atlanta

World's busiest airport

LAX

Los Angeles International

Largest West Coast hub

ORD

Chicago O'Hare

Major connecting hub, weather delays

DFW

Dallas/Fort Worth

American Airlines mega-hub

DEN

Denver International

High altitude, weather impacts

JFK

John F. Kennedy International

NY gateway, congestion delays

SFO

San Francisco International

Fog delays, tech hub traffic

SEA

Seattle-Tacoma

Alaska Airlines home base

And 90+ additional US airports across all major metro areas and regional hubs.

Delay Categories Tracked

Carrier Delay: Caused by the airline — maintenance, crew issues, aircraft cleaning, baggage handling, fueling.

Weather Delay: Significant meteorological conditions at the origin or destination airport.

NAS Delay: National Air System delays — ATC, heavy traffic, non-extreme weather conditions, airport operations.

Security Delay: Caused by security breaches, inoperative screening equipment, or passenger screening issues.

Late Aircraft Delay: Previous flight with same aircraft arrived late, causing a knock-on effect.

Important:FlightDelayBoard provides historical delay statistics for planning purposes only. This is not a real-time flight tracking service. For your actual flight status, always check directly with your airline or the FAA's official flight status tools.