77% of flights from Detroit to Washington arrived on time over the past 12 months. That is about the typical U.S. route. The 6 a.m. departures ran on time 91% of the time; the 9 p.m. ones 68%. Most reliable airline: United Airlines (82%). 11% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for DTW → IAD: when a flight was late, it was under 45 minutes late 45% of the time. About 1 in 10 flights landed an hour or more late, and 1 in 39 three hours or more; 1.2% were cancelled outright.
- On time or early77%
- 15–30 min late6.2%
- 30–60 min late5.1%
- 1–2 hours late5.0%
- 2–3 hours late2.3%
- 3+ hours late2.5%
- Diverted0.2%
- Cancelled1.2%
Share of all 2,198 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Delta Air Lines | 1,129 | 73% | 1.3% | −5 min | 12.3% | +93 min | SkyWest 61%, Endeavor Air 21%, Delta Air Lines 18% |
| United Airlines | 1,069 | 82% | 1.1% | −7 min | 7.1% | +94 min | Mesa Airlines 67%, Republic Airways 25%, United Airlines 4%, GoJet 2%, CommutAir 2% |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at DTW). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Delta Air Lines | United Airlines |
|---|---|---|
| 6 a.m. | — | 91% |
| 8 a.m. | 88% | — |
| 10 a.m. | 73% | 90% |
| 2 p.m. | 66% | 80% |
| 3 p.m. | 70% | — |
| 7 p.m. | — | 76% |
| 9 p.m. | 68% | — |
Last flight of the day
On DTW → IAD, each airline's last flight of the day was cancelled 1.9% of the time, against 0.9% for its earlier flights (2.2× as often). It arrived 3+ hours late 2.2% of the time (earlier flights: 2.7%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| Delta Air Lines | 9:38 p.m. | 1.4% | 3.0% | 1.3% | first flight 8:50 a.m. |
| United Airlines | 7:45 p.m. | 2.5% | 1.4% | 0.4% | first flight 6:00 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
If you need to be in IAD tonight, book an earlier flight so there's a backup if it's cancelled.
By month
Each calendar month pooled over 2023–2026. Best: October (90%). Worst: January (61%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 332 | 75% | 1.8% |
| Tuesday | 300 | 77% | 1.0% |
| Wednesday | 287 | 81% | 0.7% |
| Thursday | 316 | 78% | 0.3% |
| Friday | 323 | 79% | 0.9% |
| Saturday | 318 | 80% | 0.9% |
| Sunday | 322 | 72% | 2.8% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 17 · air traffic/airport 6 · airline 4
Month by month
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| UA 6190 | 2:35 p.m. | 325 | 81% | 0.3% | −7 min | Mesa Airlines |
| UA 6362 | 7:45 p.m. | 153 | 71% | 4.6% | −5 min | Mesa Airlines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Jul 21, 2026 | 6 | 0% | 2 |
| Mar 16, 2026 | 6 | 0% | 1 |
| Jan 25, 2026 | 5 | 0% | 5 |
| Jan 26, 2026 | 5 | 0% | 1 |
| Feb 7, 2026 | 5 | 0% | 0 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Detroit or Washington. None has been clearly more reliable than DTW → IAD.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| DTW → IAD (this route) | 2,198 | 77% | 1.2% |
| DTW → BWI Detroit Metro to Baltimore/Washington | 2,230 | 79% | 1.4% |
| DTW → DCA Detroit Metro to Washington Reagan National | 2,972 | 65% | 4.2% |
Questions
How often are flights from DTW to IAD on time?
77% of 2,198 scheduled flights from Detroit, MI to Washington, DC arrived within 15 minutes of schedule between September 2025 and August 2026. 1.2% were cancelled.
What is the best time of day to fly DTW to IAD?
Flights scheduled to leave at 6 a.m. were the most reliable (91% on time). The 9 p.m. departures were the least (68%).
Which airline is most on time from DTW to IAD?
United Airlines: 82% of its 1,069 flights on the route arrived on time. Delta Air Lines: 73%.
What month has the most delays from DTW to IAD?
January (61% on time). The best month is October (90%), over 2023–2026.
Is the last flight of the day from DTW to IAD more likely to be cancelled?
Yes. Each airline's last DTW–IAD flight of the day was cancelled 1.9% of the time over the past year, against 0.9% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- IAD → DTW (return)
- Detroit Metro (DTW) delays by hour
- Flights into Washington Dulles (IAD)
- Delta Air Lines on-time record
- United Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.