Carrier route record
DLDTW→EWR
Delta Air Lines · Detroit to Newark
- Flights
- 1,621
- Period
- July 2025 to June 2026
- Share of route
- 43%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on DTW to EWR carries a cancellation problem, not just a delay problem: 3.5% of scheduled flights never operate, against 1.8% nationally. Of the ones that do fly, close to three flights in four arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 1,621 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 1,491 at 79.6% on time.
The US average over the same twelve months is 77.6%, so there is little to separate Delta on DTW to EWR from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
74.0%
Arrivals under 15 minutes late, of 1,564 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
3.45%
National rate is 1.81%
Whole route
75.8%
Every carrier on DTW to EWR, 3,764 flights
These figures cover 1,621 flights between July 2025 and June 2026. Beyond the headline rate, 12.7% 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
Delta against every carrier on DTW to EWR
Delta flew 1,621 of the 3,764 flights on DTW to EWR, about 43% of it. Its 74.0% on time is 2 points worse than the route as a whole, which runs 75.8%. Ranked by on-time rate it is number three of four carriers on the route, where the range runs from United at 91.7% to Spirit at 67.7%. 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 79.6% of the time; Spirit Airlines manages 67.7%. Sample sizes sit next to every figure, because a two-point gap across 554 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlinesthin sample | 98 | 91.7% | 97 min | 2.04% | A |
| Republic Airways | 1,491 | 79.6% | 74 min | 5.77% | B− |
| Delta Air Lines (this page) | 1,621 | 74.0% | 81 min | 3.45% | C− |
| Spirit Airlines | 554 | 67.7% | 78 min | 8.30% | 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 DTW to EWR
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 37 points, against 12 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am340 flights89.8%
- 8am–11am311 flights81.5%
- 11am–2pm52 flights72.5%
- 2pm–5pm351 flights69.0%
- 5pm–8pm208 flights52.8%
- 8pm–5am359 flights69.5%
Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 52.8% on time, against 89.8% 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 8pm–5am window is the busiest, with 359 flights scheduled in it.
Across the year
Delta on DTW to EWR through the year
December is the weak month at 55.5% on time, against 84.7% in April. 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 81.1% on time and Sunday the weakest at 68.3%. 13 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Delta runs late on this route
One category carries most of the weight here. National Airspace System accounts for 45% of the 33,000 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%National Airspace System
- 36%Carrier
- 17%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 12,000 of the 33,000 delay minutes reported here. The split is drawn from 32,702 reported delay minutes.
45% 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 15,000 minutes out of 33,000, against a national NAS share of 21%.
Cancellations run at 3.45%, against 1.81% nationally. That is about one flight in 30 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. 12.7% 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 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 78.6% on time across 1,621 flights, 5 points above 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 5 points of difference.
The sample behind these figures is 1,621 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 DTW to EWR
Put together: the delay figures matter less here than the 3.45% cancellation rate. A late arrival costs you a little over an hour; 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. 1,564 completed flights over 12 months sit behind that.
Related
Where to go next
- DTW to EWR, every carrier
- Delta on EWR to DTW, the return leg
- Republic Airways on DTW to EWR79.6%
- Spirit Airlines on DTW to EWR67.7%
- Delta Air Lines network-wide record
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Newark Liberty International (EWR) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.