Flight number record

YX 3646

Republic Airways · Washington to Columbus

Route: IAD → CMH
Departs: 22:10
Flights: 320
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 320 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 77.6%. That gap is worth roughly 53 fewer late arrivals for every thousand flights.

On time

82.9%

Arrivals under 15 minutes late, of 310 completed flights

Avg delay

87 min

Across delayed arrivals only, not all flights

Cancelled

3.12%

National rate is 1.81%

1 hour+ late

6.8%

National rate is 8.1%

These figures cover 320 flights between July 2025 and June 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.

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 320 flights, with 22:15 (85 flights) and 22:09 (56 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:10114 flights35.6%
Departs 22:1585 flights26.6%
Departs 22:0956 flights17.5%

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 22:10 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and YX 3646 runs 12 points better at 82.9%. 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

YX 3646 next to IAD to CMH

Every carrier on IAD to CMH combined arrived on time 82.1% of the time across 1,061 flights, so YX 3646 is about level with it. Republic flew 672 flights on the same city pair under all its flight numbers, including this one, and those ran 80.4% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 4 points.

YX 3646 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 3646thin sample	320	82.9%	87 min	3.12%	B−
All Republic Airways on IAD–CMH	672	80.4%	84 min	2.08%	B
All carriers on IAD–CMH	1,061	82.1%	78 min	1.41%	B
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	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 80 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 202591 flights80.5%
Oct–Dec 202590 flights88.6%
Jan–Mar 202689 flights76.5%
Apr–Jun 202650 flights88.0%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, YX 3646 did best on Friday at 91.1% on time and worst on Wednesday at 75.0%. Each day rests on about 46 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 3646 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 70% of the 4,611 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.

Late-arriving aircraft
70%
Carrier
17%
National Airspace System
11%
Extreme weather
3%

70% 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 4,611 reported delay minutes here, that single category outweighs weather by 28 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 4,611 delay minutes reported on YX 3646.

Cancellations run at 3.12%, against 1.81% nationally. That is about one flight in 30 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

6.8% 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 an hour and a half, which a normal layover absorbs.

The same number turns up on two other city pairs in the data, including ORD to CHS (41) 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. 320 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, the cancellation rate is the figure to plan around on YX 3646: 3.12% of its 320 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures