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

Baltimore, MD (BWI) to Ontario, CA (ONT) flight delay odds

62.3% of 281 official scheduled BWI-to-ONT flights arrived on time; 21.7% arrived at least 30 minutes late and 0.0% 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
62.3%arrived on time
21.7%30+ min late
0.0%cancelled
281scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.0%all scheduled flights
120+ minutes late4.3%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+17.7 mincompleted flights

Which departure time was most reliable for BWI to ONT?

Among qualifying BWI-to-ONT departure window results, Late morning had the highest on-time rate: 79.7% of 64 flights. Evening was lowest at 46.9% across 64 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning6479.7%10.9%0.0%
Afternoon15361.4%22.9%0.0%
Evening6446.9%29.7%0.0%

Which weekday was most reliable for BWI to ONT?

Among qualifying BWI-to-ONT weekday results, Wednesday had the highest on-time rate: 74.3% of 35 flights. Saturday was lowest at 47.7% across 44 flights.

DayFlightsOn time30+ minCancelled
Monday4062.5%20.0%0.0%
Tuesday3863.2%21.1%0.0%
Wednesday3574.3%8.6%0.0%
Thursday3860.5%21.1%0.0%
Friday4365.1%23.3%0.0%
Saturday4447.7%36.4%0.0%
Sunday4365.1%18.6%0.0%

Which airline was most reliable for BWI to ONT?

Only Southwest Airlines met the BWI-to-ONT airline threshold: 62.3% of 281 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines28162.3%21.7%0.0%

Which month was most reliable for BWI to ONT?

Among qualifying BWI-to-ONT month results, September 2025 had the highest on-time rate: 90.0% of 30 flights. December 2025 was lowest at 41.2% across 17 flights.

MonthFlightsOn time30+ minCancelled
July 20253158.1%29.0%0.0%
August 20253073.3%16.7%0.0%
September 20253090.0%6.7%0.0%
October 20253158.1%16.1%0.0%
November 20252060.0%35.0%0.0%
December 20251741.2%47.1%0.0%
March 20262766.7%25.9%0.0%
April 20263046.7%23.3%0.0%
May 20263171.0%9.7%0.0%
June 20263050.0%26.7%0.0%

What drove BWI to ONT delay minutes?

Airline was the largest recorded BWI-to-ONT delay category, accounting for 45.9% of 6,004 BTS-attributed delay minutes during July 2025–June 2026.

Airline45.9%
Late aircraft31.2%
National airspace17.4%
Weather5.5%
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.