Flight number record

YX 3688

Republic Airways · New York to Washington

Route: LGA → IAD
Departs: 14:59
Flights: 315
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 3688, 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 3688 draws a D−. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 315 flights, with a median arrival 1 minute late.

The national on-time rate over the same period is 77.6%, so YX 3688 runs 18 points behind the country as a whole. Across a thousand flights that is about 180 extra late arrivals.

On time

59.6%

Arrivals under 15 minutes late, of 297 completed flights

Avg delay

86 min

Across delayed arrivals only, not all flights

Cancelled

5.71%

National rate is 1.81%

1 hour+ late

19.2%

National rate is 8.1%

These figures cover 315 flights between July 2025 and June 2026. Beyond the headline rate, 19.2% 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 3688 flies

YX 3688 flies LGA to IAD without a single fixed slot. Its most common scheduled departure was 14:59, used on 109 of 315 flights, with 14:55 (85 flights) and 14:51 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:59109 flights34.6%
Departs 14:5585 flights27.0%
Departs 14:5141 flights13.0%

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 14:59 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and YX 3688 runs 13 points worse at 59.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

YX 3688 next to LGA to IAD

Every carrier on LGA to IAD combined arrived on time 75.4% of the time across 980 flights, so YX 3688 is 16 points behind it. Across its whole network Republic Airways managed 78.5%, which this flight trails by 19 points.

YX 3688 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 3688thin sample	315	59.6%	86 min	5.71%	D−
All Republic Airways on LGA–IAD	980	75.4%	85 min	6.73%	B−
All carriers on LGA–IAD	980	75.4%	85 min	6.73%	B−
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 3688 quarter by quarter

YX 3688 did not run the same all year. Its best quarter was Oct–Dec 2025 at 63.0% on time and its weakest Jul–Sep 2025 at 52.3%, a swing of 11 points on roughly 79 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 flights52.3%
Oct–Dec 202578 flights63.0%
Jan–Mar 202679 flights63.0%
Apr–Jun 202666 flights61.5%

Scale runs 45% to 70%. Rows with fewer than 30 flights show a dash.

By weekday, YX 3688 did best on Saturday at 80.0% on time and worst on Monday at 51.3%. Each day rests on about 45 flights, so a gap of 29 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 3688 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 10,000 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
45%
National Airspace System
26%
Carrier
22%
Extreme weather
7%

45% 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 10,000 reported delay minutes here, that single category outweighs weather by 7 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 10,269 delay minutes reported on YX 3688.

Cancellations run at 5.71%, against 1.81% nationally. That is roughly one flight in twenty 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. 19.2% 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 four other city pairs in the data, including SAV to EWR (19), ORD to MSN (4) and SYR to ORD (3), but none flew often enough under YX 3688 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to IAD only.

One caution: this is a thin sample. 315 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 3688

For a booking, the cancellation rate is the figure to plan around on YX 3688: 5.71% of its 315 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