Flight number record

YX 3679

Republic Airways · Pittsburgh to Washington

Route: PIT → IAD
Departs: 06:15
Flights: 360
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 3679, 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 3679 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 20 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 360 flights, with a median arrival 15 minutes early.

Set against the rest of the country, YX 3679's record is 20 points better than the US average of 77.6%. That gap is worth roughly 202 fewer late arrivals for every thousand flights.

On time

97.8%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

0.83%

National rate is 1.81%

1 hour+ late

0.6%

National rate is 8.1%

These figures cover 360 flights between July 2025 and June 2026. The median arrival is 15 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 3679 flies

YX 3679 flies PIT to IAD without a single fixed slot. Its most common scheduled departure was 06:15, used on 169 of 360 flights, with 06:10 (132 flights) and 06:06 (40 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:15169 flights46.9%
Departs 06:10132 flights36.7%
Departs 06:0640 flights11.1%

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 06:15 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and YX 3679 runs 9 points better at 97.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

YX 3679 next to PIT to IAD

Every carrier on PIT to IAD combined arrived on time 88.3% of the time across 1,266 flights, so YX 3679 is 10 points ahead of it. Republic flew 767 flights on the same city pair under all its flight numbers, including this one, and those ran 88.4% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 19 points.

YX 3679 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 3679thin sample	360	97.8%	56 min	0.83%	A+
All Republic Airways on PIT–IAD	767	88.4%	50 min	1.83%	A
All carriers on PIT–IAD	1,266	88.3%	59 min	1.42%	A
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 3679 quarter by quarter

Quarter by quarter YX 3679 held fairly steady: 100.0% in Jul–Sep 2025, 94.5% in Oct–Dec 2025, 98.8% in Jan–Mar 2026 and 97.8% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights100.0%
Oct–Dec 202591 flights94.5%
Jan–Mar 202687 flights98.8%
Apr–Jun 202690 flights97.8%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, YX 3679 ranged from 94.1% on Tuesday to 100.0% on Thursday. With about 51 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why YX 3679 runs late

One category carries most of the weight here. Carrier accounts for 62% of the 447 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.

Carrier
62%
National Airspace System
38%

The largest share of delay minutes, 62%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 276 of the 447 delay minutes reported here. The split is drawn from 447 delay minutes reported on YX 3679.

Cancellations are rare at 0.83%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 0.6% 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.

Every one of the 360 flights under YX 3679 in the data flew PIT to IAD. 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. 360 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 3679

For a booking, YX 3679 has one of the better records a US domestic flight can show: 97.8% on time and 0.83% cancelled. That is a base rate, not a promise about any single day.

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