Carrier route record
OHDFW→TYS
PSA Airlines · Dallas-Fort Worth to Knoxville
- Flights
- 327
- Period
- September 2025 to August 2026
- Share of route
- 19%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with PSA Airlines.
PSA on DFW to TYS lands a B, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 327 flights, with a median arrival 7 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate PSA on DFW to TYS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
77.3%
Arrivals under 15 minutes late, of 321 completed flights
Avg delay
90 min
Across delayed arrivals only, not all flights
Cancelled
1.53%
National rate is 1.89%
Whole route
71.8%
Every carrier on DFW to TYS, 1,762 flights
These figures cover 327 flights between September 2025 and August 2026. Beyond the headline rate, 11.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
PSA against every carrier on DFW to TYS
PSA flew 327 of the 1,762 flights on DFW to TYS, about 19% of it. Its 77.3% on time is 6 points better than the route as a whole, which runs 71.8%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Envoy at 91.2% to SkyWest at 66.7%. Two 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 |
|---|---|---|---|---|---|
| Envoy Airthin sample | 92 | 91.2% | 33 min | 1.09% | A |
| PSA Airlines (this page)thin sample | 327 | 77.3% | 90 min | 1.53% | B |
| American Airlines | 1,338 | 69.1% | 68 min | 3.21% | C− |
| SkyWest Airlinesthin sample | 5 | 66.7% | 30 min | 40.00% | C− |
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 PSA runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 14 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am102 flights86.3%
- 11am–2pm—
- 2pm–5pm60 flights73.7%
- 5pm–8pm165 flights72.8%
- 8pm–5am—
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 86.3% of the time, against 72.8% for the evening window. That is 14 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 165 flights scheduled in it.
Across the year
PSA on DFW to TYS through the year
- Jul–Sep 202558 flights77.2%
- Oct–Dec 202537 flights70.3%
- Apr–Jun 202682 flights72.8%
- Jul–Sep 2026150 flights81.5%
Scale runs 60% to 85%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 77.3% on time across 327 flights.
PSA on DFW to TYS did not run the same all year. Its best quarter was Jul–Sep 2026 at 81.5% on time and its weakest Oct–Dec 2025 at 70.3%, a swing of 11 points on roughly 82 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Across the week, Wednesday is the strongest day at 84.8% on time and Sunday the weakest at 68.9%, a spread of 16 points.
Arrival by arrival
How late PSA on DFW to TYS runs when it is late
PSA on DFW to TYS often beats the schedule: 107 of 321 completed flights, 33%, arrived 15 minutes or more early. When PSA on DFW to TYS is late it tends to be very late: 37 of its 73 late arrivals were an hour or more behind, and 20 were two hours or more.
- 15+ min early107 flights33.3%
- Within 15 min141 flights43.9%
- 15–29 min late20 flights6.2%
- 30–59 min late16 flights5.0%
- 1–2 hours late17 flights5.3%
- 2+ hours late20 flights6.2%
Scale runs 0% to 100%.
Share of 321 completed flights by arrival against schedule.
15 of 79 late departures made up the time and arrived on time, 19% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for PSA on DFW to TYS
The latest arrival of the period was on 27 July 2026, 5 hours 44 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in May 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 July 2026 | 5 hours 44 minutes | Late-arriving aircraft |
| 21 September 2025 | 5 hours 7 minutes | Late-arriving aircraft |
| 25 May 2026 | 4 hours 55 minutes | Late-arriving aircraft |
| 24 May 2026 | 4 hours 27 minutes | Late-arriving aircraft |
| 27 May 2026 | 4 hours 24 minutes | Carrier |
Delay causes
Why PSA runs late on this route
Late-arriving aircraft accounts for 49% of the 6,573 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Late-arriving aircraft
- 26%Carrier
- 12%National Airspace System
- 12%Extreme weather
Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.0 times the usual weather exposure. The split is drawn from 6,573 reported delay minutes.
49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,573 reported delay minutes here, that single category outweighs weather by 4 to one.
Cancellations sit at 1.53% against a national 1.89%, which is ordinary. Diversions add another 0.31%.
Connections and stage length
What a delay here costs
11.5% 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 772 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 runs 78.6% on time across 326 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 327 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking PSA on DFW to TYS
Put together: treat all of this as provisional. 327 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 77.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 321 completed flights over 12 months sit behind that.
Related
Where to go next
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.