Flight number record
OH 5484
PSA Airlines · Washington to Knoxville
- Route
- DCA → TYS
- Departs
- 19:49
- Flights
- 316
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OH 5484, check with PSA Airlines. PSA Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OH 5484 draws a D−. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is close to two hours behind schedule. Build slack into anything you connect to. That rests on 316 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.6%, so OH 5484 runs 18 points behind the country as a whole. Across a thousand flights that is about 178 extra late arrivals.
Key figures
On time
59.8%
Arrivals under 15 minutes late, of 296 completed flights
Avg delay
104 min
Across delayed arrivals only, not all flights
Cancelled
6.01%
National rate is 1.81%
1 hour+ late
24.7%
National rate is 8.1%
These figures cover 316 flights between July 2025 and June 2026. Beyond the headline rate, 24.7% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When OH 5484 flies
OH 5484 flies DCA to TYS without a single fixed slot. Its most common scheduled departure was 19:49, used on 93 of 316 flights, with 19:45 (42 flights) and 19:47 (32 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 19:4993 flights29.4%
- Departs 19:4542 flights13.3%
- Departs 19:4732 flights10.1%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 19:49 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OH 5484 runs 8 points worse at 59.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
OH 5484 next to DCA to TYS
Every carrier on DCA to TYS combined arrived on time 68.4% of the time across 1,023 flights, so OH 5484 is 9 points behind it. PSA flew 982 flights on the same city pair under all its flight numbers, including this one, and those ran 67.7% on time. Across its whole network PSA Airlines managed 74.6%, which this flight trails by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OH 5484thin sample | 316 | 59.8% | 104 min | 6.01% | D− |
| All PSA Airlines on DCA–TYS | 982 | 67.7% | 99 min | 3.87% | C− |
| All carriers on DCA–TYS | 1,023 | 68.4% | 100 min | 3.81% | C− |
| PSA Airlines, whole network | 241,957 | 74.6% | 94 min | 4.34% | C− |
Across the year
OH 5484 quarter by quarter
Quarter by quarter OH 5484 held fairly steady: 55.7% in Jul–Sep 2025, 58.0% in Oct–Dec 2025, 59.2% in Jan–Mar 2026 and 65.1% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202578 flights55.7%
- Oct–Dec 202571 flights58.0%
- Jan–Mar 202677 flights59.2%
- Apr–Jun 202690 flights65.1%
Scale runs 45% to 70%. Rows with fewer than 30 flights show a dash.
By weekday, OH 5484 did best on Wednesday at 63.0% on time and worst on Thursday at 47.7%. Each day rests on about 45 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Delay causes
Why OH 5484 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 63% of the 12,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 63%Late-arriving aircraft
- 25%Carrier
- 10%National Airspace System
- 3%Extreme weather
63% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 12,000 reported delay minutes here, that single category outweighs weather by 22 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 12,406 delay minutes reported on OH 5484.
Cancellations run at 6.01%, against 1.81% nationally. That is roughly one flight in fifteen 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 routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 24.7% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
Every one of the 316 flights under OH 5484 in the data flew DCA to TYS. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 316 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 OH 5484
For a booking, the cancellation rate is the figure to plan around on OH 5484: 6.01% of its 316 scheduled flights did not operate. A late arrival costs close to two hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- DCA to TYS, every carrier and departure
- TYS to DCA, the return direction
- Ronald Reagan Washington National (DCA) delay statistics
- PSA Airlines on-time record
- Every PSA Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means PSA Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.