Carrier route record
YXIND→PHL
Republic Airways · Indianapolis to Philadelphia
- Flights
- 602
- Period
- July 2025 to June 2026
- Share of route
- 39%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Republic Airways.
Republic on IND to PHL 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 12 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 602 flights, with a median arrival 14 minutes early.
Set against the rest of the country, Republic's IND to PHL record is 12 points better than the US average of 77.6%. That gap is worth roughly 120 fewer late arrivals for every thousand flights.
Key figures
On time
89.6%
Arrivals under 15 minutes late, of 588 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
1.83%
National rate is 1.81%
Whole route
79.7%
Every carrier on IND to PHL, 1,549 flights
These figures cover 602 flights between July 2025 and June 2026. The median arrival is 14 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.
Carrier by carrier
Republic against every carrier on IND to PHL
Republic flew 602 of the 1,549 flights on IND to PHL, about 39% of it. Its 89.6% on time is 10 points better than the route as a whole, which runs 79.7%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Republic at 89.6% to American at 70.9%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways (this page) | 602 | 89.6% | 58 min | 1.83% | A |
| PSA Airlinesthin sample | 335 | 77.6% | 101 min | 6.57% | B− |
| American Airlines | 612 | 70.9% | 103 min | 2.29% | C |
Departure window
When Republic runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 15 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am355 flights93.1%
- 8am–11am51 flights90.2%
- 11am–2pm92 flights88.9%
- 2pm–5pm92 flights78.2%
- 5pm–8pm12 flights—
- 8pm–5am—
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.1% of the time, against 78.2% for the afternoon window. That is 15 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 355 flights scheduled in it.
Across the year
Republic on IND to PHL through the year
January is the weak month at 79.3% on time, against 100.0% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. March was the busiest month here, with 93 flights.
Across the week, Tuesday is the strongest day at 94.4% on time and Monday the weakest at 83.3%. 11 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Republic runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 3,527 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.
- 45%Late-arriving aircraft
- 28%National Airspace System
- 21%Carrier
- 6%Extreme weather
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,527 reported delay minutes here, that single category outweighs weather by 7 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,527 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 93.1% on time here.
Cancellations sit at 1.83% against a national 1.81%, which is ordinary. Diversions add another 0.50%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 3.4% 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 588 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 79.9% on time across 601 flights, 10 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 10 points of difference.
One caution: this is a thin sample. 602 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 Republic on IND to PHL
Put together: treat all of this as provisional. 602 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 89.6% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 588 completed flights over 12 months sit behind that.
Related
Where to go next
- IND to PHL, every carrier
- Republic on PHL to IND, the return leg
- PSA Airlines on IND to PHL77.6%
- American Airlines on IND to PHL70.9%
- Republic Airways network-wide record
- Indianapolis International (IND) delay statistics
- Philadelphia International (PHL) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
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.