Flight number record
OH 5646
PSA Airlines · Milwaukee to Washington
- Route
- MKE → DCA
- Departs
- 06:00
- Flights
- 333
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OH 5646, 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 5646 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 about 2.8 hours on average. That rests on 333 flights, with a median arrival 9 minutes early.
Set against the rest of the country, OH 5646's record is 5 points better than the US average of 77.3%. That gap is worth roughly 50 fewer late arrivals for every thousand flights.
Key figures
On time
82.3%
Arrivals under 15 minutes late, of 305 completed flights
Avg delay
171 min
Across delayed arrivals only, not all flights
Cancelled
8.11%
National rate is 1.89%
1 hour+ late
7.5%
National rate is 8.3%
These figures cover 333 flights between September 2025 and August 2026. The median arrival is 9 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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Schedule
When OH 5646 flies
OH 5646 flies MKE to DCA without a single fixed slot. Its most common scheduled departure was 06:00, used on 138 of 333 flights, with 06:01 (50 flights) and 06:05 (45 flights) next.
- Departs 06:00138 flights41.4%
- Departs 06:0150 flights15.0%
- Departs 06:0545 flights13.5%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OH 5646 runs 7 points worse at 82.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OH 5646 next to MKE to DCA
Every carrier on MKE to DCA combined arrived on time 72.7% of the time across 1,345 flights, so OH 5646 is 10 points ahead of it. PSA flew 658 flights on the same city pair under all its flight numbers, including this one, and those ran 72.3% on time. Across its whole network PSA Airlines managed 73.5%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OH 5646thin sample | 333 | 82.3% | 171 min | 8.11% | B− |
| All PSA Airlines on MKE–DCA | 658 | 72.3% | 144 min | 6.53% | C− |
| All carriers on MKE–DCA | 1,345 | 72.7% | 100 min | 4.09% | C− |
| PSA Airlines, whole network | 242,979 | 73.5% | 96 min | 4.80% | C− |
Across the year
OH 5646 quarter by quarter
OH 5646 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jan–Mar 2026 at 73.6%, a swing of 16 points on roughly 67 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.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202566 flights80.0%
- Jan–Mar 202685 flights73.6%
- Apr–Jun 202691 flights88.4%
- Jul–Sep 202661 flights82.7%
Scale runs 65% to 95%.
By weekday, OH 5646 did best on Monday at 88.4% on time and worst on Wednesday at 64.6%. Each day rests on about 48 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OH 5646 runs when it is late
OH 5646 often beats the schedule: 113 of 305 completed flights, 37%, arrived 15 minutes or more early. The 54 late arrivals split 23 under half an hour, 8 between 30 and 60 minutes, and 23 an hour or more.
- 15+ min early113 flights37.0%
- Within 15 min138 flights45.2%
- 15–29 min late23 flights7.5%
- 30–59 min late8 flights2.6%
- 1–2 hours late6 flights2.0%
- 2+ hours late17 flights5.6%
Scale runs 0% to 100%.
Share of 305 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 27 departures that left 15 minutes late or more, only 1 made it up before arrival. In the other direction, 28 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at DCA.
The worst days
Worst days for OH 5646
The latest arrival of the period was on 2 December 2025, 28 hours 38 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 December 2025 | 28 hours 38 minutes | Carrier |
| 23 October 2025 | 25 hours 32 minutes | Carrier |
| 11 August 2026 | 10 hours 48 minutes | Carrier |
| 12 August 2026 | 8 hours 54 minutes | Carrier |
| 18 March 2026 | 8 hours 5 minutes | Carrier |
Delay causes
Why OH 5646 runs late
Carrier accounts for 86% of the 9,231 delay minutes carriers reported here, and the remaining four split what is left.
- 86%Carrier
- 10%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 86%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 7,963 of the 9,231 delay minutes reported here. The split is drawn from 9,231 delay minutes reported on OH 5646.
Cancellations run at 8.11%, against 1.89% nationally. That is about one flight in twelve 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
7.5% 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 about 2.8 hours, which a normal layover absorbs.
The 634 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 same number turns up on four other city pairs in the data, including LBB to DFW (12), DFW to JAN (2) and DCA to AVL (1), but none flew often enough under OH 5646 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MKE to DCA only.
One caution: this is a thin sample. 333 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 5646
For a booking, the cancellation rate is the figure to plan around on OH 5646: 8.11% of its 333 scheduled flights did not operate. A late arrival costs about 2.8 hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- MKE to DCA, every carrier and departure
- DCA to MKE, the return direction
- Milwaukee Mitchell International (MKE) delay statistics
- 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
- What a cancellation rate actually tells you (and what it hides)
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.