Historical on-time performance
Ontario to Atlanta
1,900 miData through Dec 2025Source: US DOT · BTS
Flights on ONT–ATL arrive on time 89% of the time over the last 12 months.
On-time rate89%arrived within 15 min
p90 delay10 min1 in 10 flights is worse (tail risk)
Cancelled1.6%of scheduled flights
based on 930 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time89%Medianon timep9010 minCancel1.6%Flights930
Why flights run late
Delay causes
- Airline45%
- Weather7%
- Air traffic (NAS)14%
- Late aircraft32%
- Security2%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ONT → ATL
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 85% to 92% on time.
- Overnights92% on time · p90 5 min · 608 flights
- Mornings91% on time · p90 10 min · 1,207 flights
- Middays85% on time · p90 20 min · 1,103 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 87% to 90% on time.
- Wednesdays90% on time · p90 10 min · 407 flights
- Saturdays90% on time · p90 10 min · 369 flights
- Thursdays90% on time · p90 10 min · 436 flights
- Tuesdays90% on time · p90 10 min · 398 flights
- Mondays88% on time · p90 10 min · 436 flights
- Fridays88% on time · p90 15 min · 435 flights
- Sundays87% on time · p90 15 min · 437 flights
Advertisement
Keep exploring