Carrier route record

YXPHL→DTW

Republic Airways · Philadelphia to Detroit

Flights: 112
Period: July 2025 to June 2026
Share of route: 4%
Carriers: 7

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Republic Airways.

Republic on PHL to DTW sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land close to two hours behind schedule. That rests on 112 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,557 at 82.3% on time.

The US average over the same twelve months is 77.6%, so there is little to separate Republic on PHL to DTW from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

74.3%

Arrivals under 15 minutes late, of 109 completed flights

Avg delay

110 min

Across delayed arrivals only, not all flights

Cancelled

2.68%

National rate is 1.81%

Whole route

79.8%

Every carrier on PHL to DTW, 2,952 flights

These figures cover 112 flights between July 2025 and June 2026. Beyond the headline rate, 11.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Carrier by carrier

Republic against every carrier on PHL to DTW

Republic flew 112 of the 2,952 flights on PHL to DTW, about 4% of it. Its 74.3% on time is 6 points worse than the route as a whole, which runs 79.8%. Ranked by on-time rate it is number five of seven carriers on the route, where the range runs from Spirit at 87.9% to SkyWest at 67.2%. Four of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 82.3% of the time; PSA Airlines manages 76.3%. Sample sizes sit next to every figure, because a two-point gap across 845 flights means less than a ten-point one.

On-time performance by carrier on PHL to DTW
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlinesthin sample	133	87.9%	102 min	0.75%	A+
Delta Air Lines	1,557	82.3%	105 min	2.12%	B
American Airlinesthin sample	179	79.7%	72 min	0.56%	B+
PSA Airlines	845	76.3%	73 min	5.80%	B−
Republic Airways (this page)thin sample	112	74.3%	110 min	2.68%	C
Frontier Airlinesthin sample	57	67.9%	56 min	1.75%	C
SkyWest Airlinesthin sample	69	67.2%	223 min	2.90%	C

PSA Airlines cancels 5.8% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

Departure window

When Republic runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 112 flights.

There are not enough flights in each departure window to split Republic's PHL to DTW record by time of day without the percentages moving on noise. The headline rate of 74.3% is the reliable figure here.

Across the year

Republic on PHL to DTW through the year

Jul–Sep 202556 flights64.2%
Oct–Dec 202546 flights80.4%
Jan–Mar 202610 flights—

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 74.3% on time across 112 flights.

Split by quarter, Republic on PHL to DTW logged 56 flights in Jul–Sep 2025, 46 flights in Oct–Dec 2025 and 10 flights in Jan–Mar 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 74.3% annual figure is the one to use.

Delay causes

Why Republic runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 52% of the 3,070 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.

Late-arriving aircraft
52%
National Airspace System
27%
Carrier
18%
Extreme weather
3%

52% 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 3,070 reported delay minutes here, that single category outweighs weather by 19 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 3,070 reported delay minutes.

Cancellations run at 2.68%, against 1.81% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and stage length

What a delay here costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

At 453 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 2pm–5pm window matters as much as it does.

The return leg runs 73.6% on time across 112 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 112 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 PHL to DTW

Put together: treat all of this as provisional. 112 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 74.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 109 completed flights over 12 months sit behind that.

Where to go next

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