Flight number record
YX 3479
Republic Airways · Indianapolis to Chicago
- Route
- IND → ORD
- Departs
- 06:00
- Flights
- 359
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 359 flights, with a median arrival 15 minutes early.
Set against the rest of the country, YX 3479's record is 15 points better than the US average of 77.3%. That gap is worth roughly 154 fewer late arrivals for every thousand flights.
Key figures
On time
92.7%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
0.84%
National rate is 1.89%
1 hour+ late
2.0%
National rate is 8.3%
These figures cover 359 flights between September 2025 and August 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.
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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 356 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 06:00356 flights99.2%
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 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 3 points better at 92.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
YX 3479 next to IND to ORD
Every carrier on IND to ORD combined arrived on time 76.7% of the time across 5,274 flights, so YX 3479 is 16 points ahead of it. Republic flew 2,778 flights on the same city pair under all its flight numbers, including this one, and those ran 83.2% on time. Across its whole network Republic Airways managed 78.1%, which this flight beats by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 3479thin sample | 359 | 92.7% | 67 min | 0.84% | A+ |
| All Republic Airways on IND–ORD | 2,778 | 83.2% | 72 min | 2.52% | B |
| All carriers on IND–ORD | 5,274 | 76.7% | 85 min | 3.41% | B− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 3479 quarter by quarter
Quarter by quarter YX 3479 held fairly steady: 90.8% in Oct–Dec 2025, 92.0% in Jan–Mar 2026, 94.5% in Apr–Jun 2026 and 90.3% in Jul–Sep 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202529 flights—
- Oct–Dec 202589 flights90.8%
- Jan–Mar 202688 flights92.0%
- Apr–Jun 202691 flights94.5%
- Jul–Sep 202662 flights90.3%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, YX 3479 ranged from 86.5% on Monday to 98.1% on Saturday. With about 51 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late YX 3479 runs when it is late
YX 3479 often beats the schedule: 181 of 356 completed flights, 51%, arrived 15 minutes or more early. The 26 late arrivals split 10 under half an hour, 9 between 30 and 60 minutes, and 7 an hour or more.
- 15+ min early181 flights50.8%
- Within 15 min149 flights41.9%
- 15–29 min late10 flights2.8%
- 30–59 min late9 flights2.5%
- 1–2 hours late1 flights0.3%
- 2+ hours late6 flights1.7%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
5 of 20 late departures made up the time and arrived on time, 25% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for YX 3479
The latest arrival of the period was on 14 April 2026, 3 hours 34 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 carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 April 2026 | 3 hours 34 minutes | National Airspace System |
| 19 July 2026 | 3 hours 5 minutes | Carrier |
| 6 June 2026 | 2 hours 58 minutes | National Airspace System |
| 15 December 2025 | 2 hours 29 minutes | Carrier |
| 31 October 2025 | 2 hours 8 minutes | Carrier |
Delay causes
Why YX 3479 runs late
Carrier accounts for 53% of the 1,739 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Carrier
- 47%National Airspace System
The largest share of delay minutes, 53%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 914 of the 1,739 delay minutes reported here. The split is drawn from 1,739 delay minutes reported on YX 3479.
Cancellations are rare at 0.84%, below the national 1.89% 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 2.0% land an hour or more behind schedule, against 8.3% 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 RDU (6) and STL to EWR (3), 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: 92.7% on time and 0.84% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IND to ORD, every carrier and departure
- ORD to IND, the return direction
- Indianapolis International (IND) delay statistics
- Chicago O'Hare International (ORD) 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
- Worst months to fly in the US, ranked by the data
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.