Flight number record
YX 3709
Republic Airways · Indianapolis to Washington
- Route
- IND → IAD
- Departs
- 10:05
- Flights
- 295
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 3709, 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 3709 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 50 minutes. That rests on 295 flights, with a median arrival 13 minutes early.
Set against the rest of the country, YX 3709's record is 15 points better than the US average of 77.3%. That gap is worth roughly 148 fewer late arrivals for every thousand flights.
Key figures
On time
92.1%
Arrivals under 15 minutes late, of 292 completed flights
Avg delay
51 min
Across delayed arrivals only, not all flights
Cancelled
1.02%
National rate is 1.89%
1 hour+ late
2.7%
National rate is 8.3%
These figures cover 295 flights between September 2025 and August 2026. The median arrival is 13 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 3709 flies
YX 3709 flies IND to IAD without a single fixed slot. Its most common scheduled departure was 10:05, used on 98 of 295 flights, with 10:11 (82 flights) and 10:00 (40 flights) next.
- Departs 10:0598 flights33.2%
- Departs 10:1182 flights27.8%
- Departs 10:0040 flights13.6%
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 10:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and YX 3709 runs 8 points better at 92.1%. 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 3709 next to IND to IAD
Every carrier on IND to IAD combined arrived on time 85.2% of the time across 987 flights, so YX 3709 is 7 points ahead of it. Republic flew 938 flights on the same city pair under all its flight numbers, including this one, and those ran 85.0% on time. Across its whole network Republic Airways managed 78.1%, which this flight beats by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 3709thin sample | 295 | 92.1% | 51 min | 1.02% | A |
| All Republic Airways on IND–IAD | 938 | 85.0% | 69 min | 1.28% | A |
| All carriers on IND–IAD | 987 | 85.2% | 67 min | 1.22% | A |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 3709 quarter by quarter
YX 3709 did not run the same all year. Its best quarter was Apr–Jun 2026 at 100.0% on time and its weakest Jan–Mar 2026 at 85.9%, a swing of 14 points on roughly 74 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 202529 flights—
- Oct–Dec 202583 flights91.5%
- Jan–Mar 202680 flights85.9%
- Apr–Jun 202641 flights100.0%
- Jul–Sep 202662 flights91.9%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, YX 3709 ranged from 88.4% on Sunday to 97.7% on Monday. With about 42 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late YX 3709 runs when it is late
YX 3709 often beats the schedule: 114 of 292 completed flights, 39%, arrived 15 minutes or more early. Most of the lateness is short. 12 of the 23 late arrivals were under half an hour behind, and 8 reached an hour or more.
- 15+ min early114 flights39.0%
- Within 15 min155 flights53.1%
- 15–29 min late12 flights4.1%
- 30–59 min late3 flights1.0%
- 1–2 hours late6 flights2.1%
- 2+ hours late2 flights0.7%
Scale runs 0% to 100%.
Share of 292 completed flights by arrival against schedule.
A late pushback is often recovered here: of 23 departures that left 15 minutes late or more, 7 still arrived on time. 7 flights left on time and still arrived late.
The worst days
Worst days for YX 3709
The latest arrival of the period was on 11 December 2025, 2 hours 57 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 December 2025 | 2 hours 57 minutes | National Airspace System |
| 29 January 2026 | 2 hours 50 minutes | Carrier |
| 14 December 2025 | 1 hour 35 minutes | Late-arriving aircraft |
| 31 December 2025 | 1 hour 22 minutes | Late-arriving aircraft |
| 7 July 2026 | 1 hour 15 minutes | Late-arriving aircraft |
Delay causes
Why YX 3709 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 1,172 reported delay minutes.
- 38%National Airspace System
- 32%Carrier
- 30%Late-arriving aircraft
38% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 442 minutes out of 1,172, against a national NAS share of 21%. The split is drawn from 1,172 delay minutes reported on YX 3709.
Cancellations sit at 1.02% against a national 1.89%, 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 2.7% 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 seven other city pairs in the data, including IAD to PWM (21), IAD to PIT (18) and PWM to IAD (18), but none flew often enough under YX 3709 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IND to IAD only.
One caution: this is a thin sample. 295 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 3709
For a booking, YX 3709 has one of the better records a US domestic flight can show: 92.1% on time and 1.02% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IND to IAD, every carrier and departure
- IAD to IND, the return direction
- Republic Airways 3530 on the same route81.9%
- Indianapolis International (IND) delay statistics
- Washington Dulles International (IAD) 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.