Carrier route record
DLEWR→DTW
Delta Air Lines · Newark to Detroit
- Flights
- 1,612
- Period
- September 2025 to August 2026
- Share of route
- 44%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on EWR to DTW carries a cancellation problem, not just a delay problem: 4.0% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, about four flights in five arrive on time, worth a B− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 1,612 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 1,558 at 84.4% on time.
The US average over the same twelve months is 77.3%, so there is little to separate Delta on EWR to DTW from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
79.6%
Arrivals under 15 minutes late, of 1,547 completed flights
Avg delay
108 min
Across delayed arrivals only, not all flights
Cancelled
4.03%
National rate is 1.89%
Whole route
79.9%
Every carrier on EWR to DTW, 3,660 flights
These figures cover 1,612 flights between September 2025 and August 2026. Beyond the headline rate, 10.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Delta against every carrier on EWR to DTW
Delta flew 1,612 of the 3,660 flights on EWR to DTW, about 44% of it. Its 79.6% on time is about level with the route as a whole at 79.9%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Republic at 84.4% to Spirit at 65.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Republic Airways arrives on time 84.4% of the time; Spirit Airlines manages 65.7%. Sample sizes sit next to every figure, because a two-point gap across 433 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways | 1,558 | 84.4% | 70 min | 6.68% | B− |
| Delta Air Lines (this page) | 1,612 | 79.6% | 108 min | 4.03% | B− |
| United Airlinesthin sample | 57 | 75.0% | 47 min | 1.75% | B |
| Spirit Airlines | 433 | 65.7% | 75 min | 8.31% | C− |
Spirit Airlines cancels 8.3% 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.
Flight by flight
Delta flight numbers on EWR to DTW
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Departure window
When Delta runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 32 points, against 19 points between the best and worst carrier.
- 5am–8am365 flights90.1%
- 8am–11am342 flights83.1%
- 11am–2pm362 flights81.0%
- 2pm–5pm69 flights57.8%
- 5pm–8pm280 flights79.5%
- 8pm–5am194 flights57.7%
Scale runs 50% to 95%.
The 8pm–5am window is where this operation falls apart: 57.7% on time, against 90.1% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5am–8am window is the busiest, with 365 flights scheduled in it.
Across the year
Delta on EWR to DTW through the year
December is the weak month at 68.1% on time, against 91.3% in February. 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. October was the busiest month here, with 150 flights.
Across the week, Tuesday is the strongest day at 86.6% on time and Monday the weakest at 74.4%, a spread of 12 points.
Arrival by arrival
How late Delta on EWR to DTW runs when it is late
Delta on EWR to DTW often beats the schedule: 700 of 1,547 completed flights, 45%, arrived 15 minutes or more early. When Delta on EWR to DTW is late it tends to be very late: 162 of its 316 late arrivals were an hour or more behind, and 74 were two hours or more.
- 15+ min early700 flights45.2%
- Within 15 min531 flights34.3%
- 15–29 min late76 flights4.9%
- 30–59 min late78 flights5.0%
- 1–2 hours late88 flights5.7%
- 2+ hours late74 flights4.8%
Scale runs 0% to 100%.
Share of 1,547 completed flights by arrival against schedule.
54 of 311 late departures made up the time and arrived on time, 17% of them. 59 flights left on time and still arrived late.
The worst days
Worst days for Delta on EWR to DTW
The latest arrival of the period was on 12 June 2026, 14 hours 59 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 June 2026 | 14 hours 59 minutes | Carrier |
| 18 June 2026 | 14 hours 54 minutes | Carrier |
| 21 November 2025 | 14 hours 3 minutes | Carrier |
| 30 November 2025 | 13 hours 58 minutes | Carrier |
| 20 August 2026 | 13 hours 46 minutes | Extreme weather |
Delay causes
Why Delta runs late on this route
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 34,000 reported delay minutes.
- 41%Carrier
- 40%Late-arriving aircraft
- 15%National Airspace System
- 4%Extreme weather
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 34,000 reported delay minutes here, that single category outweighs weather by 9 to one. The split is drawn from 33,970 reported delay minutes.
The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 14,000 of the 34,000 delay minutes reported here.
Cancellations run at 4.03%, against 1.89% nationally. That is about one flight in 25 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
10.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 488 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 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 75.4% on time across 1,612 flights, 4 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 4 points of difference.
The sample behind these figures is 1,612 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking Delta on EWR to DTW
Put together: the delay figures matter less here than the 4.03% cancellation rate. A late arrival costs you close to two hours; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 1,547 completed flights over 12 months sit behind that.
Related
Where to go next
- EWR to DTW, every carrier
- Delta on DTW to EWR, the return leg
- Republic Airways on EWR to DTW84.4%
- Spirit Airlines on EWR to DTW65.7%
- Delta Air Lines network-wide record
- Newark Liberty International (EWR) delay statistics
- Detroit Metropolitan Wayne County (DTW) delay statistics
- The US routes with the most cancellations
- Same route, different airline: where the carrier you pick matters most
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.