BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
DFW→ONT

Dallas/Fort Worth, TX (DFW) to Ontario, CA (ONT) flight delay odds

66.9% of 2,306 official scheduled DFW-to-ONT flights arrived on time; 19.4% arrived at least 30 minutes late and 2.9% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
66.9%arrived on time
19.4%30+ min late
2.9%cancelled
2,306scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.5%all scheduled flights
120+ minutes late4.2%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+14.0 mincompleted flights

Which departure time was most reliable for DFW to ONT?

Among qualifying DFW-to-ONT departure window results, Early morning had the highest on-time rate: 83.7% of 338 flights. Night was lowest at 51.6% across 579 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning33883.7%8.3%2.4%
Late morning34169.8%17.9%1.2%
Afternoon56175.8%13.7%2.9%
Evening48761.0%24.6%3.7%
Night57951.6%27.8%3.6%

Which weekday was most reliable for DFW to ONT?

Among qualifying DFW-to-ONT weekday results, Tuesday had the highest on-time rate: 71.7% of 311 flights. Sunday was lowest at 61.5% across 361 flights.

DayFlightsOn time30+ minCancelled
Monday34067.9%20.6%3.2%
Tuesday31171.7%15.1%3.2%
Wednesday28969.6%19.4%0.3%
Thursday35569.6%18.6%1.7%
Friday33366.1%19.2%2.7%
Saturday31762.5%19.9%4.7%
Sunday36161.5%22.4%4.2%

Which airline was most reliable for DFW to ONT?

Among qualifying DFW-to-ONT airline results, Frontier Airlines had the highest on-time rate: 78.9% of 322 flights. American Airlines was lowest at 64.9% across 1,984 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines1,98464.9%20.5%2.9%
Frontier Airlines32278.9%12.4%2.8%

Which month was most reliable for DFW to ONT?

Among qualifying DFW-to-ONT month results, February 2026 had the highest on-time rate: 85.5% of 152 flights. July 2025 was lowest at 48.2% across 224 flights.

MonthFlightsOn time30+ minCancelled
July 202522448.2%38.8%3.6%
August 202521255.7%29.2%3.8%
September 202518371.6%14.8%2.2%
October 202520767.6%18.4%1.0%
November 202518868.6%17.0%2.7%
December 202520173.1%14.4%1.0%
January 202616867.9%13.7%8.3%
February 202615285.5%7.2%2.0%
March 202618483.7%10.3%1.6%
April 202618067.2%17.8%1.1%
May 202619764.5%19.8%3.6%
June 202621058.6%22.9%4.3%

What drove DFW to ONT delay minutes?

Late aircraft was the largest recorded DFW-to-ONT delay category, accounting for 53.7% of 45,639 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.8%
Late aircraft53.7%
National airspace8.5%
Weather7.0%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.