Flight profile · PSA Airlines
OH5646
Milwaukee (MKE) to Washington (DCA) · scheduled 6:00 AM – 9:00 AM
How OH5646 performs
923 operations, October 2023 – July 2026.
OH5646 arrived on time 82.1% of the time, against 78.2% for all MKE → DCA flights, so this departure is 3.9 percentage points better than the route as a whole. Against PSA Airlines’ own flights on this route it is 5.4 points better.
Source: US DOT Bureau of Transportation Statistics · 923 operations, October 2023 – July 2026 · If OH5646 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How OH5646 compares to other flight numbers, not just to itself.
Every day of the week performs about the same on this flight, steadier than 92% of 1,710 comparable flight numbers.
83.5% on time on the best day (Monday) against 78.5% on the worst (Wednesday).
Source: FlyerIntel analysis of US DOT BTS data · October 2023 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where OH5646 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| OH5646 | 82.1% | 5.85% | -8 min | 6.7% | 923 |
| PSA Airlines on MKE → DCA | 76.7% | 4.54% | -7 min | 10.3% | 1,851 |
| All MKE → DCA flights | 78.2% | 2.78% | -7 min | 8.3% | 3,990 |
OH5646 has cancelled 5.85% of its scheduled departures (54 of 923), against 2.78% for all MKE → DCA flights — this specific departure cancels 3.1 percentage points more often than the route as a whole. Different flight numbers on the same route can carry different aircraft, crews and schedules, so this is a fact about OH5646 specifically, not about the route it flies.
Source: FlyerIntel analysis of US DOT BTS data · October 2023 – July 2026
Why OH5646 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for OH5646 on MKE → DCA. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering October 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies OH5646 comes in late, and what that does to the departure.
OH5646 is usually the aircraft’s first flight of the day: the schedule gives it a median of 8.6 hours on the ground at MKE, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, OH5646 pushed back an average of 20 minutes late; when it came in on time or early, an average of 6 minutes late.
Each departure is matched to the flight the same aircraft flew into MKE just before it, using the tail number in the DOT file, 801 of 870 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| OH5646 | 34% | 14% | 6% |
| Network, same turn | 29% | 12% | 9% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less on a turn this long than on a same-day one.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often OH5646’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often OH5646 left 15 or more minutes late is about the same as the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering October 2023 – July 2026
From pushback to gate
When it leaves MKE late, does that still matter by the time it reaches DCA?
On arrival at DCA, OH5646 spends 10.3 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 2.7 minutes longer than a typical DCA arrival (7.6 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached DCA. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 10,952 departures from MKE scheduled in the clock hour OH5646 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at DCA (435,126 flights), not just OH5646’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · October 2023 – July 2026
The hour it leaves MKE
Part of any flight’s record belongs to the clock rather than to the flight. OH5646 has one departure time, so this is what that time is worth.
On-time arrival rate. 10,952 departures from MKE are scheduled in the 6 AM–7 AM hour over the period, against 87,869 across the whole day.
OH5646 is scheduled out of MKE at 6:00 AM, in the 6 AM–7 AM bank. Departures from MKE in that hour arrive on time 86.7% of the time against 80.7% across the airport’s whole day — the slot alone is worth 6.0 points better before anything about this particular flight is considered.
The two airport figures cover every departure from MKE to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · October 2023 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does OH5646 run worse on particular days?
Monday is historically the most reliable day and Wednesday the least, a gap of 5.0 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · October 2023 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes OH5646 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| LBB→DFW Lubbock to Dallas–Fort Worth | December 25, 2025 – January 5, 2026 | 12 | — |
| DFW→JAN Dallas–Fort Worth to Jackson | December 6–13, 2025 | 2 | — |
| AVL→DCA Asheville to Washington | November 29, 2025 | 1 | — |
| DCA→AVL Washington to Asheville | November 29, 2025 | 1 | — |
| DFW→XNA Dallas–Fort Worth to Fayetteville/Springdale/Rogers | September 9–30, 2023 | 4 | — |
| XNA→DFW Fayetteville/Springdale/Rogers to Dallas–Fort Worth | September 9–30, 2023 | 4 | — |
Because the same number has served different journeys, the statistics above describe only the route OH5646 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
28 min late
against a median of 8 min early
Percentiles over 923 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering October 2023 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| OH5646 this flight | PSA Airlines | 82.1% | 8 min early | 923 |
| OH5637 | PSA Airlines | 71.8% | 6 min early | 780 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. OH5646 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 923 records of OH5646 operating MKE → DCA, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
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