STL to DAL flight delays & on-time performance
Nonstop flights from St. Louis Lambert International Airport to Dallas Love Field · 546 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at STL or DAL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from St. Louis (STL) to Dallas (DAL) arrived on time 76% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.5% were cancelled, and 8% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 7am did best (94% on time); around 9pm did worst (51%).
- Wednesday was the most reliable day to fly (85% on time) and Sunday the least (68%).
- The largest source of delay minutes was late-arriving aircraft (47%).
Which airline is most on time from STL 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 | 76% | 1.5% | 16 min | 7.8% | 1,952 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am93%213 flights
- 6am88%67 flights
- 7am94%109 flights
- 8am90%222 flights
- 9am94%48 flights
- 10am84%83 flights
- 11am84%91 flights
- 12pm80%104 flights
- 1pm71%31 flights
- 2pm75%205 flights
- 3pm68%124 flights
- 4pm57%73 flights
- 5pm58%82 flights
- 6pm64%131 flights
- 7pm68%134 flights
- 8pm56%78 flights
- 9pm51%157 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday71%2.0% cancelled
- Tuesday84%0.7% cancelled
- Wednesday85%0.4% cancelled
- Thursday75%0.7% cancelled
- Friday76%1.0% cancelled
- Saturday71%2.8% cancelled
- Sunday68%3.1% 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 aircraft47%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion19%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather72%
- Airline (crew, maintenance, cleaning, fueling)28%
- Air traffic control & airport congestion0%
- Security0%
STL to DAL: common questions
- How often are STL to DAL flights on time?
- 76% 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 St. Louis to Dallas cancelled?
- 1.5% of scheduled flights were cancelled (29 of 1,952).
- How long are typical delays?
- Across all flights the average arrival delay was 16 min (early arrivals count as zero). Flights that were late arrived 61 min behind schedule on average, and 7.8% of flights were an hour or more late.
- How long is taxi time at STL?
- Flights on this route spent 11 min taxiing from the gate to takeoff on average.
Related routes
Return trip: DAL to STL — 76% on time
More flights from St. Louis
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: STL → DAL, nonstop flights by US airlines that report to the DOT. How we calculate this.