Flight number record
YX 3688
Republic Airways · New York to Washington
- Route
- LGA → IAD
- Departs
- 14:55
- Flights
- 294
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 three 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 294 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.3%, so YX 3688 runs 15 points behind the country as a whole. Across a thousand flights that is about 153 extra late arrivals.
Key figures
On time
62.0%
Arrivals under 15 minutes late, of 274 completed flights
Avg delay
84 min
Across delayed arrivals only, not all flights
Cancelled
6.12%
National rate is 1.89%
1 hour+ late
18.6%
National rate is 8.3%
These figures cover 294 flights between September 2025 and August 2026. Beyond the headline rate, 18.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When YX 3688 flies
YX 3688 flies LGA to IAD without a single fixed slot. Its most common scheduled departure was 14:55, used on 85 of 294 flights, with 14:51 (82 flights) and 14:59 (66 flights) next.
- Departs 14:5585 flights28.9%
- Departs 14:5182 flights27.9%
- Departs 14:5966 flights22.4%
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 14:55 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and YX 3688 runs 10 points worse at 62.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
YX 3688 next to LGA to IAD
Every carrier on LGA to IAD combined arrived on time 76.1% of the time across 912 flights, so YX 3688 is 14 points behind it. Across its whole network Republic Airways managed 78.1%, which this flight trails by 16 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 3688thin sample | 294 | 62.0% | 84 min | 6.12% | D− |
| All Republic Airways on LGA–IAD | 912 | 76.1% | 85 min | 7.13% | B− |
| All carriers on LGA–IAD | 912 | 76.1% | 85 min | 7.13% | B− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 3688 quarter by quarter
YX 3688 did not run the same all year. Its best quarter was Jul–Sep 2026 at 66.7% on time and its weakest Jul–Sep 2025 at 53.3%, a swing of 13 points on roughly 59 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 202530 flights53.3%
- Oct–Dec 202578 flights63.0%
- Jan–Mar 202679 flights63.0%
- Apr–Jun 202666 flights61.5%
- Jul–Sep 202641 flights66.7%
Scale runs 45% to 70%.
By weekday, YX 3688 did best on Saturday at 77.5% on time and worst on Sunday at 52.6%. Each day rests on about 42 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 3688 runs when it is late
The 104 late arrivals split 22 under half an hour, 31 between 30 and 60 minutes, and 51 an hour or more.
- 15+ min early65 flights23.7%
- Within 15 min105 flights38.3%
- 15–29 min late22 flights8.0%
- 30–59 min late31 flights11.3%
- 1–2 hours late29 flights10.6%
- 2+ hours late22 flights8.0%
Scale runs 0% to 100%.
Share of 274 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 94 departures that left 15 minutes late or more, only 10 made it up before arrival. In the other direction, 20 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 IAD.
The worst days
Worst days for YX 3688
The latest arrival of the period was on 7 August 2026, 5 hours 50 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 August 2026 | 5 hours 50 minutes | National Airspace System |
| 2 August 2026 | 5 hours 47 minutes | Late-arriving aircraft |
| 30 October 2025 | 5 hours 34 minutes | Late-arriving aircraft |
| 24 November 2025 | 5 hours 23 minutes | Late-arriving aircraft |
| 12 June 2026 | 4 hours 55 minutes | Extreme weather |
Delay causes
Why YX 3688 runs late
Late-arriving aircraft accounts for 52% of the 8,703 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Late-arriving aircraft
- 28%National Airspace System
- 16%Carrier
- 5%Extreme weather
52% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,703 reported delay minutes here, that single category outweighs weather by 10 to one. The split is drawn from 8,703 delay minutes reported on YX 3688.
Cancellations run at 6.12%, against 1.89% nationally. That is roughly one flight in fifteen 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
18.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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 SAV to EWR (19), BTV to IAD (15) and ORD to MSN (4), 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. 294 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: 6.12% of its 294 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.
Related
Where to go next
- LGA to IAD, every carrier and departure
- IAD to LGA, the return direction
- LaGuardia (LGA) delay statistics
- Washington Dulles International (IAD) 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.