Flight number record
OH 5646
PSA Airlines · Milwaukee to Washington
- Route
- MKE → DCA
- Departs
- 06:00
- Flights
- 334
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 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−, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 2.7 hours on average. That is a workable record, not a spotless one. That rests on 334 flights, with a median arrival 9 minutes early.
Set against the rest of the country, OH 5646's record is 6 points better than the US average of 77.6%. That gap is worth roughly 56 fewer late arrivals for every thousand flights.
Key figures
On time
83.2%
Arrivals under 15 minutes late, of 309 completed flights
Avg delay
164 min
Across delayed arrivals only, not all flights
Cancelled
7.19%
National rate is 1.81%
1 hour+ late
7.4%
National rate is 8.1%
These figures cover 334 flights between July 2025 and June 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.
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 119 of 334 flights, with 06:01 (49 flights) and 06:05 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 06:00119 flights35.6%
- Departs 06:0149 flights14.7%
- Departs 06:0541 flights12.3%
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 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 6 points worse at 83.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
OH 5646 next to MKE to DCA
Every carrier on MKE to DCA combined arrived on time 75.4% of the time across 1,349 flights, so OH 5646 is 8 points ahead of it. PSA flew 659 flights on the same city pair under all its flight numbers, including this one, and those ran 75.8% on time. Across its whole network PSA Airlines managed 74.6%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OH 5646thin sample | 334 | 83.2% | 164 min | 7.19% | B− |
| All PSA Airlines on MKE–DCA | 659 | 75.8% | 134 min | 5.46% | B− |
| All carriers on MKE–DCA | 1,349 | 75.4% | 94 min | 3.63% | B− |
| PSA Airlines, whole network | 241,957 | 74.6% | 94 min | 4.34% | 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 88.4% on time and its weakest Jan–Mar 2026 at 73.6%, a swing of 15 points on roughly 84 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 202592 flights88.4%
- Oct–Dec 202566 flights80.0%
- Jan–Mar 202685 flights73.6%
- Apr–Jun 202691 flights88.4%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, OH 5646 did best on Saturday at 89.7% on time and worst on Wednesday at 69.4%. Each day rests on about 48 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Delay causes
Why OH 5646 runs late
One category carries most of the weight here. Carrier accounts for 80% of the 8,527 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.
- 80%Carrier
- 10%National Airspace System
- 7%Late-arriving aircraft
- 4%Extreme weather
The largest share of delay minutes, 80%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 6,790 of the 8,527 delay minutes reported here. The split is drawn from 8,527 delay minutes reported on OH 5646.
Cancellations run at 7.19%, against 1.81% nationally. That is about 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
7.4% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 2.7 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
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. 334 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: 7.19% of its 334 scheduled flights did not operate. A late arrival costs about 2.7 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
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.