Flight number record
YX 4686
Republic Airways · Washington to Nashville
- Route
- DCA → BNA
- Departs
- 11:34
- Flights
- 347
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s YX 4686, 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 4686 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 347 flights, with a median arrival 10 minutes early.
Set against the rest of the country, YX 4686's record is 7 points better than the US average of 77.6%. That gap is worth roughly 74 fewer late arrivals for every thousand flights.
Key figures
On time
85.0%
Arrivals under 15 minutes late, of 341 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
1.73%
National rate is 1.81%
1 hour+ late
4.4%
National rate is 8.1%
These figures cover 347 flights between July 2025 and June 2026. The median arrival is 10 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 4686 flies
YX 4686 flies DCA to BNA without a single fixed slot. Its most common scheduled departure was 11:34, used on 54 of 347 flights, with 11:56 (44 flights) and 10:59 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 11:3454 flights15.6%
- Departs 11:5644 flights12.7%
- Departs 10:5936 flights10.4%
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 11:34 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and YX 4686 runs 6 points better at 85.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
YX 4686 next to DCA to BNA
Every carrier on DCA to BNA combined arrived on time 77.1% of the time across 4,329 flights, so YX 4686 is 8 points ahead of it. Republic flew 1,861 flights on the same city pair under all its flight numbers, including this one, and those ran 83.5% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 4686thin sample | 347 | 85.0% | 56 min | 1.73% | A |
| All Republic Airways on DCA–BNA | 1,861 | 83.5% | 61 min | 2.26% | B |
| All carriers on DCA–BNA | 4,329 | 77.1% | 66 min | 3.03% | B− |
| Republic Airways, whole network | 361,482 | 78.5% | 72 min | 4.08% | B− |
Across the year
YX 4686 quarter by quarter
YX 4686 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.1% on time and its weakest Oct–Dec 2025 at 76.9%, a swing of 16 points on roughly 87 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 202587 flights93.1%
- Oct–Dec 202591 flights76.9%
- Jan–Mar 202690 flights83.7%
- Apr–Jun 202679 flights87.0%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, YX 4686 did best on Monday at 93.9% on time and worst on Saturday at 80.0%. Each day rests on about 50 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Delay causes
Why YX 4686 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 44% of the 2,836 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.
- 44%Late-arriving aircraft
- 25%Carrier
- 21%National Airspace System
- 10%Extreme weather
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 2,836 reported delay minutes here, that single category outweighs weather by 4 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 2,836 delay minutes reported on YX 4686.
Cancellations sit at 1.73% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.4% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 562 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
Every one of the 347 flights under YX 4686 in the data flew DCA to BNA. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 347 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 4686
For a booking, read YX 4686 as 85.0% on time with 1.73% cancelled over 347 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DCA to BNA, every carrier and departure
- BNA to DCA, the return direction
- Republic Airways 5707 on the same route79.7%
- Ronald Reagan Washington National (DCA) delay statistics
- Nashville International (BNA) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.