Flight number record

YX 3479

Republic Airways · Indianapolis to Chicago

Route: IND → ORD
Departs: 06:00
Flights: 359
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 3479, 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 3479 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 359 flights, with a median arrival 16 minutes early.

Set against the rest of the country, YX 3479's record is 16 points better than the US average of 77.6%. That gap is worth roughly 159 fewer late arrivals for every thousand flights.

On time

93.5%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

0.84%

National rate is 1.81%

1 hour+ late

1.4%

National rate is 8.1%

These figures cover 359 flights between July 2025 and June 2026. The median arrival is 16 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 3479 flies

YX 3479 is scheduled to leave Indianapolis (IND) at 06:00 local time and reach Chicago (ORD) at 06:20. That slot held for 359 of the 359 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 06:00359 flights100.0%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and YX 3479 runs 4 points better at 93.5%. 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 3479 next to IND to ORD

Every carrier on IND to ORD combined arrived on time 76.5% of the time across 5,201 flights, so YX 3479 is 17 points ahead of it. Republic flew 2,713 flights on the same city pair under all its flight numbers, including this one, and those ran 82.4% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 15 points.

YX 3479 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 3479thin sample	359	93.5%	62 min	0.84%	A+
All Republic Airways on IND–ORD	2,713	82.4%	70 min	2.06%	B
All carriers on IND–ORD	5,201	76.5%	83 min	3.06%	B−
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 3479 quarter by quarter

Quarter by quarter YX 3479 held fairly steady: 96.7% in Jul–Sep 2025, 90.8% in Oct–Dec 2025, 92.0% in Jan–Mar 2026 and 94.5% 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 202591 flights96.7%
Oct–Dec 202589 flights90.8%
Jan–Mar 202688 flights92.0%
Apr–Jun 202691 flights94.5%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, YX 3479 ranged from 88.2% on Monday to 98.0% on Sunday. With about 51 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why YX 3479 runs late

One category carries most of the weight here. National Airspace System accounts for 52% of the 1,431 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.

National Airspace System
52%
Carrier
48%

The largest share of delay minutes, 48%, 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 681 of the 1,431 delay minutes reported here. The split is drawn from 1,431 delay minutes reported on YX 3479.

Cancellations are rare at 0.84%, 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 1.4% 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 same number turns up on six other city pairs in the data, including ORD to ORF (25), ORD to MCI (11) and ORD to RDU (6), but none flew often enough under YX 3479 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IND to ORD only.

One caution: this is a thin sample. 359 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 3479

For a booking, YX 3479 has one of the better records a US domestic flight can show: 93.5% on time and 0.84% 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