Flight number record

YX 5729

Republic Airways · Washington to Lexington

Route: DCA → LEX
Departs: 21:25
Flights: 303
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 5729, 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 5729 sits in the middle of the pack with a B−. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 303 flights, with a median arrival 9 minutes early.

On time

75.6%

Arrivals under 15 minutes late, of 291 completed flights

Avg delay

96 min

Across delayed arrivals only, not all flights

Cancelled

3.63%

National rate is 1.81%

1 hour+ late

15.1%

National rate is 8.1%

These figures cover 303 flights between July 2025 and June 2026. Beyond the headline rate, 15.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When YX 5729 flies

YX 5729 flies DCA to LEX without a single fixed slot. Its most common scheduled departure was 21:25, used on 106 of 303 flights, with 21:30 (56 flights) and 21:05 (47 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:25106 flights35.0%
Departs 21:3056 flights18.5%
Departs 21:0547 flights15.5%

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 21:25 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and YX 5729 runs 5 points better at 75.6%. 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 5729 next to DCA to LEX

Across its whole network Republic Airways managed 78.5%, which this flight trails by 3 points.

YX 5729 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 5729thin sample	303	75.6%	96 min	3.63%	B−
All Republic Airways on DCA–LEXthin sample	303	75.6%	96 min	3.63%	B−
All carriers on DCA–LEXthin sample	303	75.6%	96 min	3.63%	B−
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 5729 quarter by quarter

Quarter by quarter YX 5729 held fairly steady: 71.6% in Jul–Sep 2025, 78.9% in Oct–Dec 2025, 72.2% in Jan–Mar 2026 and 79.7% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202578 flights71.6%
Oct–Dec 202572 flights78.9%
Jan–Mar 202675 flights72.2%
Apr–Jun 202678 flights79.7%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, YX 5729 did best on Sunday at 85.7% on time and worst on Friday at 68.1%. Each day rests on about 43 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 5729 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 46% of the 6,784 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
46%
Carrier
29%
National Airspace System
24%
Extreme weather
1%

46% 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 6,784 reported delay minutes here, that single category outweighs weather by 46 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 6,784 delay minutes reported on YX 5729.

Cancellations run at 3.63%, against 1.81% nationally. That is roughly 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 15.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The same number turns up on one other city pair in the data, including LGA to GSO (10), but none flew often enough under YX 5729 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DCA to LEX only.

One caution: this is a thin sample. 303 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 5729

For a booking, the cancellation rate is the figure to plan around on YX 5729: 3.63% of its 303 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