Carrier route record
AADFW→ONT
American Airlines · Dallas-Fort Worth to Ontario
- Flights
- 1,940
- Period
- September 2025 to August 2026
- Share of route
- 85%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with American Airlines.
American on DFW to ONT sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 1,940 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.3%, so American on DFW to ONT runs 8 points behind the country as a whole. Across a thousand flights that is about 76 extra late arrivals.
Key figures
On time
69.7%
Arrivals under 15 minutes late, of 1,892 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
2.42%
National rate is 1.89%
Whole route
71.7%
Every carrier on DFW to ONT, 2,274 flights
These figures cover 1,940 flights between September 2025 and August 2026. Beyond the headline rate, 10.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
American against every carrier on DFW to ONT
American flew 1,940 of the 2,274 flights on DFW to ONT, most of the route. Its 69.7% on time is 2 points worse than the route as a whole, which runs 71.7%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Frontier at 83.3% to American at 69.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Frontier Airlinesthin sample | 334 | 83.3% | 58 min | 1.20% | B |
| American Airlines (this page) | 1,940 | 69.7% | 66 min | 2.42% | C |
Flight by flight
American flight numbers on DFW to ONT
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Departure window
When American runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 26 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am564 flights81.3%
- 11am–2pm393 flights77.7%
- 2pm–5pm51 flights70.8%
- 5pm–8pm370 flights64.1%
- 8pm–5am562 flights55.8%
Scale runs 45% to 85%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 55.8% on time, against 81.3% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 564 flights scheduled in it.
Across the year
American on DFW to ONT through the year
June is the worst month at 60.5% on time, 25 points below February, the best at 85.6%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. July was the busiest month here, with 183 flights.
Across the week, Tuesday is the strongest day at 73.7% on time and Sunday the weakest at 63.0%, a spread of 11 points.
Arrival by arrival
How late American on DFW to ONT runs when it is late
American on DFW to ONT often beats the schedule: 475 of 1,892 completed flights, 25%, arrived 15 minutes or more early. The 574 late arrivals split 216 under half an hour, 162 between 30 and 60 minutes, and 196 an hour or more.
- 15+ min early475 flights25.1%
- Within 15 min843 flights44.6%
- 15–29 min late216 flights11.4%
- 30–59 min late162 flights8.6%
- 1–2 hours late117 flights6.2%
- 2+ hours late79 flights4.2%
Scale runs 0% to 100%.
Share of 1,892 completed flights by arrival against schedule.
171 of 688 late departures made up the time and arrived on time, 25% of them. 57 flights left on time and still arrived late.
The worst days
Worst days for American on DFW to ONT
The latest arrival of the period was on 20 July 2026, 9 hours 27 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 20 July 2026 | 9 hours 27 minutes | Late-arriving aircraft |
| 20 July 2026 | 8 hours 15 minutes | Carrier |
| 1 September 2025 | 8 hours 5 minutes | Carrier |
| 9 January 2026 | 7 hours 40 minutes | Carrier |
| 30 August 2026 | 7 hours 30 minutes | Late-arriving aircraft |
Delay causes
Why American runs late on this route
Late-arriving aircraft accounts for 53% of the 38,000 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Late-arriving aircraft
- 34%Carrier
- 7%National Airspace System
- 6%Extreme weather
- 0%Security
53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 38,000 reported delay minutes here, that single category outweighs weather by 8 to one. The split is drawn from 37,982 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 81.3% on time here.
Cancellations sit at 2.42% against a national 1.89%, which is ordinary. Diversions add another 0.05%.
Connections and stage length
What a delay here costs
10.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 1,188 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 81.9% on time across 1,940 flights, 12 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 12 points of difference.
The sample behind these figures is 1,940 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking American on DFW to ONT
Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 85.6% on time and June 60.5%, a swing of 25 points. If the dates move at all, move them out of June before you think about anything else. 1,892 completed flights over 12 months sit behind that.
Related
Where to go next
- DFW to ONT, every carrier
- American on ONT to DFW, the return leg
- Frontier Airlines on DFW to ONT83.3%
- American Airlines network-wide record
- Dallas/Fort Worth International (DFW) delay statistics
- Ontario International (ONT) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.