Flight profile · Republic Airways
YX3679
Pittsburgh (PIT) to Washington (IAD) · scheduled 6:15 AM – 7:25 AM
How YX3679 performs
793 operations, May 2024 – July 2026.
YX3679 arrived on time 95.2% of the time, against 88.7% for all PIT → IAD flights, so this departure is 6.5 percentage points better than the route as a whole. Against Republic Airways’ own flights on this route it is 6.1 points better.
Source: US DOT Bureau of Transportation Statistics · 793 operations, May 2024 – July 2026 · If YX3679 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How YX3679 compares to other flight numbers, not just to itself.
This flight stays close to typical even on its worst days, a smaller gap than 96% of 11,788 comparable flight numbers.
A typical arrival is 11 min early, and the worst tenth are only 18 minutes worse than that.
Source: FlyerIntel analysis of US DOT BTS data · May 2024 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where YX3679 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| YX3679 | 95.2% | 0.63% | -11 min | 0.9% | 793 |
| Republic Airways on PIT → IAD | 89.1% | 1.09% | -11 min | 2.8% | 2,204 |
| All PIT → IAD flights | 88.7% | 1.03% | -11 min | 3.2% | 2,806 |
Source: FlyerIntel analysis of US DOT BTS data · May 2024 – July 2026
Why YX3679 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
Share of the delay minutes US DOT attributed to each cause for YX3679 on PIT → IAD. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering May 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies YX3679 comes in late, and what that does to the departure.
YX3679 is usually the aircraft’s first flight of the day: the schedule gives it a median of 7.1 hours on the ground at PIT, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, YX3679 pushed back an average of 2 minutes late; when it came in on time or early, an average of 4 minutes early.
Each departure is matched to the flight the same aircraft flew into PIT just before it, using the tail number in the DOT file, 671 of 788 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| YX3679 | 20% | 6% | 3% |
| Network, same turn | 29% | 12% | 9% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less on a turn this long than on a same-day one.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often YX3679’s aircraft landed 15 or more minutes late is lower than the network’s and, once the aircraft was late, how often YX3679 left 15 or more minutes late is lower than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering May 2024 – July 2026
From pushback to gate
When it leaves PIT late, does that still matter by the time it reaches IAD?
YX3679 pushes back an average of 3.2 minutes early and reaches the gate at IAD an average of 8.2 minutes early. The 5.0 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. It spends 18.7 minutes on the taxiways at PIT, 2.0 minutes longer than a typical PIT departure in the same hour.
On arrival at IAD, YX3679 spends 8.5 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 1.0 minutes longer than a typical IAD arrival (7.5 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached IAD. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 19,842 departures from PIT scheduled in the clock hour YX3679 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at IAD (169,930 flights), not just YX3679’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · May 2024 – July 2026
The hour it leaves PIT
Part of any flight’s record belongs to the clock rather than to the flight. YX3679 has one departure time, so this is what that time is worth.
On-time arrival rate. 19,842 departures from PIT are scheduled in the 6 AM–7 AM hour over the period, against 132,911 across the whole day.
YX3679 is scheduled out of PIT at 6:15 AM, in the 6 AM–7 AM bank. Departures from PIT in that hour arrive on time 91.1% of the time against 82.1% across the airport’s whole day — the slot alone is worth 9.0 points better before anything about this particular flight is considered.
The two airport figures cover every departure from PIT to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · May 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes YX3679 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| EWR→GSO Newark to Greensboro | May 4–5, 2024 | 2 | — |
| EWR→IAD Newark to Washington | November 4, 2023 – March 30, 2024 | 9 | — |
| CID→ORD Cedar Rapids to Chicago | March 6, 2024 | 1 | — |
| PWM→IAD Portland to Washington | February 16–29, 2024 | 14 | — |
| IAD→SAV Washington to Savannah | January 13–27, 2024 | 3 | — |
| SAV→IAD Savannah to Washington | January 13–27, 2024 | 3 | — |
| IAD→LGA Washington to New York | January 8, 2024 | 1 | — |
| LGA→IAD New York to Washington | January 8, 2024 | 1 | — |
| ORD→BNA Chicago to Nashville | December 21, 2023 – January 7, 2024 | 16 | — |
| EWR→BUF Newark to Buffalo | December 1–20, 2023 | 20 | — |
| CMH→EWR Columbus to Newark | October 1–27, 2023 | 23 | — |
| GSP→EWR Greenville/Greer/Spartanburg to Newark | July 1, 2023 – September 30, 2023 | 68 | — |
| ORD→RIC Chicago to Richmond | September 18–28, 2023 | 10 | — |
| ORF→EWR Norfolk to Newark | September 5–23, 2023 | 4 | — |
Because the same number has served different journeys, the statistics above describe only the route YX3679 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
7 min late
against a median of 11 min early
Percentiles over 793 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering May 2024 – July 2026
Data and methodology
Calculated by FlyerIntel from 793 records of YX3679 operating PIT → IAD, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
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