Flight number record

YX 4371

Republic Airways · New York to Washington

Route: LGA → DCA
Departs: 12:01
Flights: 269
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 4371, 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 4371 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 269 flights, with a median arrival 1 minute late.

The national on-time rate over the same period is 77.6%, so YX 4371 runs 9 points behind the country as a whole. Across a thousand flights that is about 94 extra late arrivals.

On time

68.2%

Arrivals under 15 minutes late, of 261 completed flights

Avg delay

71 min

Across delayed arrivals only, not all flights

Cancelled

2.97%

National rate is 1.81%

1 hour+ late

13.8%

National rate is 8.1%

These figures cover 269 flights between July 2025 and June 2026. Beyond the headline rate, 13.8% 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 4371 flies

YX 4371 flies LGA to DCA without a single fixed slot. Its most common scheduled departure was 12:01, used on 54 of 269 flights, with 12:00 (47 flights) and 09:29 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 12:0154 flights20.1%
Departs 12:0047 flights17.5%
Departs 09:2931 flights11.5%

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 12:01 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and YX 4371 runs 11 points worse at 68.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

YX 4371 next to LGA to DCA

Every carrier on LGA to DCA combined arrived on time 68.3% of the time across 4,830 flights, so YX 4371 is about level with it. Republic flew 4,751 flights on the same city pair under all its flight numbers, including this one, and those ran 68.4% on time. Across its whole network Republic Airways managed 78.5%, which this flight trails by 10 points.

YX 4371 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 4371thin sample	269	68.2%	71 min	2.97%	C
All Republic Airways on LGA–DCA	4,751	68.4%	62 min	5.51%	C−
All carriers on LGA–DCA	4,830	68.3%	62 min	5.45%	C−
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 4371 quarter by quarter

YX 4371 did not run the same all year. Its best quarter was Jul–Sep 2025 at 84.5% on time and its weakest Oct–Dec 2025 at 57.5%, a swing of 27 points on roughly 90 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 202584 flights84.5%
Oct–Dec 202589 flights57.5%
Jan–Mar 202690 flights64.3%
Apr–Jun 20266 flights—

Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, YX 4371 ranged from 64.1% on Thursday to 75.0% on Saturday. With about 38 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why YX 4371 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 44% of the 5,889 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
44%
National Airspace System
38%
Carrier
14%
Extreme weather
3%
Security
0%

44% 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 5,889 reported delay minutes here, that single category outweighs weather by 13 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 5,889 delay minutes reported on YX 4371.

Cancellations run at 2.97%, 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. 13.8% 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 six other city pairs in the data, including BOS to IND (38), ORD to JFK (13) and MYR to ORD (6), but none flew often enough under YX 4371 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to DCA only.

One caution: this is a thin sample. 269 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 4371

For a booking, the cancellation rate is the figure to plan around on YX 4371: 2.97% of its 269 scheduled flights did not operate. A late arrival costs a little over an hour, 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