Flight number record
YX 3646
Republic Airways · Washington to Columbus
- Route
- IAD → CMH
- Departs
- 22:10
- Flights
- 279
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 3646, check with Republic Airways. Republic Airways flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
YX 3646 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 a little over an hour on average. That rests on 279 flights, with a median arrival 11 minutes early.
Set against the rest of the country, YX 3646's record is 5 points better than the US average of 77.3%. That gap is worth roughly 51 fewer late arrivals for every thousand flights.
Key figures
On time
82.4%
Arrivals under 15 minutes late, of 273 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
2.15%
National rate is 1.89%
1 hour+ late
7.3%
National rate is 8.3%
These figures cover 279 flights between September 2025 and August 2026. The median arrival is 11 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 YX 3646 flies
YX 3646 flies IAD to CMH without a single fixed slot. Its most common scheduled departure was 22:10, used on 114 of 279 flights, with 22:09 (56 flights) and 22:15 (44 flights) next.
- Departs 22:10114 flights40.9%
- Departs 22:0956 flights20.1%
- Departs 22:1544 flights15.8%
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 22:10 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and YX 3646 runs 12 points better at 82.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
YX 3646 next to IAD to CMH
Every carrier on IAD to CMH combined arrived on time 82.1% of the time across 936 flights, so YX 3646 is about level with it. Republic flew 527 flights on the same city pair under all its flight numbers, including this one, and those ran 81.4% on time. Across its whole network Republic Airways managed 78.1%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 3646thin sample | 279 | 82.4% | 74 min | 2.15% | B |
| All Republic Airways on IAD–CMH | 527 | 81.4% | 77 min | 1.90% | B |
| All carriers on IAD–CMH | 936 | 82.1% | 74 min | 1.18% | B |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 3646 quarter by quarter
YX 3646 did not run the same all year. Its best quarter was Oct–Dec 2025 at 88.6% on time and its weakest Jan–Mar 2026 at 76.5%, a swing of 12 points on roughly 93 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 202529 flights—
- Oct–Dec 202590 flights88.6%
- Jan–Mar 202689 flights76.5%
- Apr–Jun 202650 flights88.0%
- Jul–Sep 202621 flights—
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, YX 3646 did best on Friday at 92.3% on time and worst on Sunday at 73.7%. Each day rests on about 40 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 3646 runs when it is late
YX 3646 often beats the schedule: 109 of 273 completed flights, 40%, arrived 15 minutes or more early. The 48 late arrivals split 15 under half an hour, 13 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early109 flights39.9%
- Within 15 min116 flights42.5%
- 15–29 min late15 flights5.5%
- 30–59 min late13 flights4.8%
- 1–2 hours late14 flights5.1%
- 2+ hours late6 flights2.2%
Scale runs 0% to 100%.
Share of 273 completed flights by arrival against schedule.
6 of 39 late departures made up the time and arrived on time, 15% of them. In the other direction, 15 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 CMH.
The worst days
Worst days for YX 3646
The latest arrival of the period was on 4 September 2025, 14 hours 6 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 September 2025 | 14 hours 6 minutes | Late-arriving aircraft |
| 27 April 2026 | 2 hours 39 minutes | Late-arriving aircraft |
| 14 September 2025 | 2 hours 25 minutes | Carrier |
| 7 February 2026 | 2 hours 24 minutes | Late-arriving aircraft |
| 19 February 2026 | 2 hours 9 minutes | Extreme weather |
Delay causes
Why YX 3646 runs late
Late-arriving aircraft accounts for 64% of the 3,567 delay minutes carriers reported here, and the remaining four split what is left.
- 64%Late-arriving aircraft
- 22%Carrier
- 12%National Airspace System
- 3%Extreme weather
64% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,567 reported delay minutes here, that single category outweighs weather by 25 to one. The split is drawn from 3,567 delay minutes reported on YX 3646.
Cancellations sit at 2.15% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
7.3% 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 a little over an hour, which a normal layover absorbs.
The same number turns up on two other city pairs in the data, including ORD to CHS (82) and ORD to SAV (1), but none flew often enough under YX 3646 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAD to CMH only.
One caution: this is a thin sample. 279 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 YX 3646
For a booking, read YX 3646 as 82.4% on time with 2.15% cancelled over 279 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IAD to CMH, every carrier and departure
- CMH to IAD, the return direction
- Washington Dulles International (IAD) delay statistics
- John Glenn Columbus International (CMH) delay statistics
- Republic Airways on-time record
- Every Republic Airways 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 Republic Airways’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.