Carrier route record
AAONT→DFW
American Airlines · Ontario to Dallas-Fort Worth
- 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 ONT to DFW lands a B, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 1,940 flights, with a median arrival 10 minutes early.
Set against the rest of the country, American's ONT to DFW record is 5 points better than the US average of 77.3%. That gap is worth roughly 46 fewer late arrivals for every thousand flights.
Key figures
On time
81.9%
Arrivals under 15 minutes late, of 1,874 completed flights
Avg delay
104 min
Across delayed arrivals only, not all flights
Cancelled
2.58%
National rate is 1.89%
Whole route
80.8%
Every carrier on ONT to DFW, 2,274 flights
These figures cover 1,940 flights between September 2025 and August 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
American against every carrier on ONT to DFW
American flew 1,940 of the 2,274 flights on ONT to DFW, most of the route. Its 81.9% on time is about level with the route as a whole at 80.8%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from American at 81.9% to Frontier at 74.8%. 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 |
|---|---|---|---|---|---|
| American Airlines (this page) | 1,940 | 81.9% | 104 min | 2.58% | B |
| Frontier Airlinesthin sample | 334 | 74.8% | 64 min | 1.50% | C |
Flight by flight
American flight numbers on ONT to DFW
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
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 20 points, against half a point between the best and worst carrier.
- 5am–8am666 flights89.9%
- 8am–11am231 flights82.7%
- 11am–2pm424 flights76.5%
- 2pm–5pm359 flights70.0%
- 5pm–8pm—
- 8pm–5am260 flights85.2%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 89.9% of the time, against 70.0% for the afternoon window. That is 20 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 666 flights scheduled in it.
Across the year
American on ONT to DFW through the year
June is the worst month at 77.5% on time, 10 points below February, the best at 87.8%. 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 85.1% on time and Saturday the weakest at 77.6%, a spread of 8 points.
Arrival by arrival
How late American on ONT to DFW runs when it is late
American on ONT to DFW often beats the schedule: 679 of 1,874 completed flights, 36%, arrived 15 minutes or more early. The 340 late arrivals split 117 under half an hour, 88 between 30 and 60 minutes, and 135 an hour or more.
- 15+ min early679 flights36.2%
- Within 15 min855 flights45.6%
- 15–29 min late117 flights6.2%
- 30–59 min late88 flights4.7%
- 1–2 hours late72 flights3.8%
- 2+ hours late63 flights3.4%
Scale runs 0% to 100%.
Share of 1,874 completed flights by arrival against schedule.
76 of 349 late departures made up the time and arrived on time, 22% of them. 67 flights left on time and still arrived late.
The worst days
Worst days for American on ONT to DFW
The latest arrival of the period was on 6 July 2026, 30 hours 20 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 July 2026 | 30 hours 20 minutes | Carrier |
| 13 December 2025 | 29 hours 19 minutes | Carrier |
| 21 April 2026 | 26 hours 8 minutes | Carrier |
| 31 July 2026 | 23 hours 55 minutes | Carrier |
| 30 July 2026 | 18 hours 33 minutes | Carrier |
Delay causes
Why American runs late on this route
Carrier accounts for 50% of the 35,000 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Carrier
- 39%Late-arriving aircraft
- 8%National Airspace System
- 2%Extreme weather
- 0%Security
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 35,000 reported delay minutes here, that single category outweighs weather by 16 to one. The split is drawn from 35,456 reported delay minutes.
The largest share of delay minutes, 50%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 18,000 of the 35,000 delay minutes reported here.
Cancellations run at 2.58%, against 1.89% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
7.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.
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 69.7% on time across 1,940 flights, 12 points below 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 ONT to DFW
Put together: take the 5am–8am departure, avoid June if the dates are flexible, and if two carriers are within a few dollars of each other, the top row of the table is the one with the record behind it. None of that guarantees an on-time arrival; it moves the odds by 20 points, which is the most any booking decision can do. 1,874 completed flights over 12 months sit behind that.
Related
Where to go next
- ONT to DFW, every carrier
- American on DFW to ONT, the return leg
- Frontier Airlines on ONT to DFW74.8%
- American Airlines network-wide record
- Ontario International (ONT) delay statistics
- Dallas/Fort Worth International (DFW) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.