79% of flights from Baltimore to Detroit arrived on time over the past 12 months. That is about the typical U.S. route. The 11 a.m. departures ran on time 90% of the time; the 10 p.m. ones 52%. Most reliable airline: Delta Air Lines (84%). 8% 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 BWI → DTW: when a flight was late, it was under 45 minutes late 55% of the time. About 1 in 16 flights landed an hour or more late, and 1 in 66 three hours or more; 2.1% were cancelled outright.
- On time or early79%
- 15–30 min late6.9%
- 30–60 min late5.5%
- 1–2 hours late3.3%
- 2–3 hours late1.5%
- 3+ hours late1.5%
- Diverted0.0%
- Cancelled2.1%
Share of all 2,233 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 | 1,224 | 84% | 1.8% | −14 min | 5.6% | +101 min | Delta Air Lines |
| Southwest Airlines | 772 | 72% | 2.6% | 0 min | 7.3% | +58 min | Southwest Airlines |
| Frontier Airlines | 178 | 74% | 1.7% | −8 min | 8.4% | +65 min | Frontier Airlines |
| Spirit Airlines | 59 | — | — | — | — | — | Spirit Airlines |
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 BWI). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Delta Air Lines | Southwest Airlines |
|---|---|---|
| 6 a.m. | 91% | — |
| 9 a.m. | 84% | — |
| 10 a.m. | — | 85% |
| noon | 85% | — |
| 5 p.m. | 76% | — |
| 9 p.m. | — | 74% |
| 10 p.m. | — | 52% |
Last flight of the day
On BWI → DTW, each airline's last flight of the day was cancelled 3.0% of the time, against 1.6% for its earlier flights (1.9× as often). It arrived 3+ hours late 1.8% of the time (earlier flights: 1.5%). 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 | 5:32 p.m. | 2.2% | 3.3% | 1.6% | first flight 6:08 a.m. |
| Southwest Airlines | 9:30 p.m. | 3.9% | 0.3% | 1.5% | first flight 12:35 p.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 DTW 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 (89%). Worst: July (70%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 341 | 76% | 2.4% |
| Tuesday | 306 | 84% | 2.6% |
| Wednesday | 306 | 86% | 0.0% |
| Thursday | 314 | 83% | 0.6% |
| Friday | 335 | 78% | 3.0% |
| Saturday | 291 | 78% | 1.7% |
| Sunday | 340 | 71% | 3.8% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: airline 25 · weather 16 · air traffic/airport 5
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 |
|---|---|---|---|---|---|---|
| DL 2601 | 6:00 a.m. | 365 | 91% | 2.5% | −14 min | Delta Air Lines |
| F9 3081 | 9:49 a.m. | 166 | 75% | 1.8% | −8 min | Frontier Airlines |
| DL 1546 | 11:45 a.m. | 306 | 87% | 0.7% | −17 min | Delta Air Lines |
| DL 2480 | 5:36 p.m. | 359 | 77% | 2.2% | −11 min | Delta Air Lines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Mar 16, 2026 | 6 | 0% | 1 |
| Jan 25, 2026 | 5 | 0% | 5 |
| Aug 10, 2026 | 7 | 14% | 1 |
| Aug 8, 2026 | 6 | 17% | 1 |
| Dec 5, 2025 | 6 | 17% | 1 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Baltimore or Detroit. None has been clearly more reliable than BWI → DTW.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| BWI → DTW (this route) | 2,233 | 79% | 2.1% |
| IAD → DTW Washington Dulles to Detroit Metro | 2,199 | 77% | 1.6% |
| DCA → DTW Washington Reagan National to Detroit Metro | 2,973 | 72% | 4.0% |
Questions
How often are flights from BWI to DTW on time?
79% of 2,233 scheduled flights from Baltimore, MD to Detroit, MI arrived within 15 minutes of schedule between September 2025 and August 2026. 2.1% were cancelled.
What is the best time of day to fly BWI to DTW?
Flights scheduled to leave at 11 a.m. were the most reliable (90% on time). The 10 p.m. departures were the least (52%).
Which airline is most on time from BWI to DTW?
Delta Air Lines: 84% of its 1,224 flights on the route arrived on time. Southwest Airlines: 72%. Frontier Airlines: 74%.
What month has the most delays from BWI to DTW?
July (70% on time). The best month is October (89%), over 2023–2026.
Is the last flight of the day from BWI to DTW more likely to be cancelled?
Yes. Each airline's last BWI–DTW flight of the day was cancelled 3.0% of the time over the past year, against 1.6% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- DTW → BWI (return)
- Baltimore/Washington (BWI) delays by hour
- Flights into Detroit Metro (DTW)
- Delta Air Lines on-time record
- Southwest Airlines on-time record
- Frontier Airlines on-time record
- Spirit 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.