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

Ontario, CA (ONT) to Dallas, TX (DAL) flight delay odds

74.4% of 403 official scheduled ONT-to-DAL flights arrived on time; 11.9% arrived at least 30 minutes late and 1.5% 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 SIGNALGenerally reliable
74.4%arrived on time
11.9%30+ min late
1.5%cancelled
403scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.0%all scheduled flights
120+ minutes late1.2%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+9.7 mincompleted flights

Which departure time was most reliable for ONT to DAL?

Among qualifying ONT-to-DAL departure window results, Early morning had the highest on-time rate: 90.8% of 174 flights. Afternoon was lowest at 54.9% across 71 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning17490.8%1.7%1.7%
Late morning14062.9%18.6%0.0%
Afternoon7154.9%25.4%4.2%

Which weekday was most reliable for ONT to DAL?

Among qualifying ONT-to-DAL weekday results, Saturday had the highest on-time rate: 91.2% of 57 flights. Friday was lowest at 60.0% across 55 flights.

DayFlightsOn time30+ minCancelled
Monday5563.6%23.6%0.0%
Tuesday5685.7%3.6%1.8%
Wednesday5377.4%9.4%1.9%
Thursday5261.5%17.3%3.8%
Friday5560.0%21.8%0.0%
Saturday5791.2%0.0%1.8%
Sunday7578.7%9.3%1.3%

Which airline was most reliable for ONT to DAL?

Only Southwest Airlines met the ONT-to-DAL airline threshold: 74.4% of 403 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines40374.4%11.9%1.5%

Which month was most reliable for ONT to DAL?

Among qualifying ONT-to-DAL month results, July 2025 had the highest on-time rate: 97.1% of 35 flights. May 2026 was lowest at 51.4% across 35 flights.

MonthFlightsOn time30+ minCancelled
July 20253597.1%0.0%0.0%
August 20253554.3%25.7%0.0%
September 20253482.4%11.8%0.0%
October 20253183.9%3.2%3.2%
November 20253574.3%8.6%5.7%
December 20254285.7%9.5%0.0%
January 20263479.4%8.8%2.9%
February 20262885.7%3.6%0.0%
March 20263164.5%16.1%0.0%
April 20263366.7%12.1%0.0%
May 20263551.4%20.0%5.7%
June 20263066.7%23.3%0.0%

What drove ONT to DAL delay minutes?

Late aircraft was the largest recorded ONT-to-DAL delay category, accounting for 45.3% of 4,185 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.7%
Late aircraft45.3%
National airspace24.0%
Weather0.0%
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.