ONT to DAL flight delays & on-time performance
Nonstop flights from Ontario International Airport to Dallas Love Field · 1,200 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ONT or DAL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Ontario (ONT) to Dallas (DAL) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.5% were cancelled, and 6% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 5am did best (97% on time); around 11am did worst (50%).
- Saturday was the most reliable day to fly (95% on time) and Friday the least (61%).
- The largest source of delay minutes was late-arriving aircraft (46%).
Which airline is most on time from ONT to DAL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 74% | 1.5% | 14 min | 5.6% | 399 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am97%31 flights
- 6am93%56 flights
- 7am96%28 flights
- 8am84%32 flights
- 9am79%29 flights
- 10am80%40 flights
- 11am50%84 flights
- 12pm77%24 flights
- 1pm53%15 flights
- 4pm59%45 flights
- 5pm79%14 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday64%0.0% cancelled
- Tuesday85%1.8% cancelled
- Wednesday77%1.9% cancelled
- Thursday62%3.8% cancelled
- Friday61%0.0% cancelled
- Saturday95%1.8% cancelled
- Sunday76%1.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft46%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion23%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather67%
- Airline (crew, maintenance, cleaning, fueling)17%
- Air traffic control & airport congestion17%
- Security0%
ONT to DAL: common questions
- How often are ONT to DAL flights on time?
- 74% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Ontario to Dallas cancelled?
- 1.5% of scheduled flights were cancelled (6 of 399).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 44 min behind schedule on average, and 5.6% of flights were an hour or more late.
- How long is taxi time at ONT?
- Flights on this route spent 12 min taxiing from the gate to takeoff on average.
Related routes
Return trip: DAL to ONT — 68% on time
More flights from Ontario
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ONT → DAL, nonstop flights by US airlines that report to the DOT. How we calculate this.