Carrier route record
DLMSP→BWI
Delta Air Lines · Minneapolis to Baltimore
- Flights
- 923
- Period
- September 2025 to August 2026
- Share of route
- 65%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on MSP to BWI lands a B, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 923 flights, with a median arrival 8 minutes early.
Set against the rest of the country, Delta's MSP to BWI record is 5 points better than the US average of 77.3%. That gap is worth roughly 47 fewer late arrivals for every thousand flights.
Key figures
On time
82.0%
Arrivals under 15 minutes late, of 906 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
1.52%
National rate is 1.89%
Whole route
82.1%
Every carrier on MSP to BWI, 1,419 flights
These figures cover 923 flights between September 2025 and August 2026. The median arrival is 8 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Delta against every carrier on MSP to BWI
Delta flew 923 of the 1,419 flights on MSP to BWI, most of the route. Its 82.0% on time is about level with the route as a whole at 82.1%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Southwest at 82.3% to Delta at 82.0%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 496 | 82.3% | 52 min | 1.81% | B |
| Delta Air Lines (this page) | 923 | 82.0% | 61 min | 1.52% | B |
Flight by flight
Delta flight numbers on MSP to BWI
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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 10 points, against half a point between the best and worst carrier.
- 5am–8am208 flights87.3%
- 8am–11am143 flights88.7%
- 11am–2pm1 flights—
- 2pm–5pm209 flights78.3%
- 5pm–8pm81 flights79.0%
- 8pm–5am281 flights78.6%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 88.7% of the time, against 78.3% for the afternoon window. That is 10 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 281 flights scheduled in it.
Across the year
Delta on MSP to BWI through the year
July is the worst month at 71.6% on time, 19 points below September, the best at 90.9%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. May was the busiest month here, with 87 flights.
Across the week, Tuesday is the strongest day at 91.0% on time and Sunday the weakest at 71.9%, a spread of 19 points.
Arrival by arrival
How late Delta on MSP to BWI runs when it is late
Delta on MSP to BWI often beats the schedule: 294 of 906 completed flights, 32%, arrived 15 minutes or more early. The 163 late arrivals split 49 under half an hour, 63 between 30 and 60 minutes, and 51 an hour or more.
- 15+ min early294 flights32.5%
- Within 15 min449 flights49.6%
- 15–29 min late49 flights5.4%
- 30–59 min late63 flights7.0%
- 1–2 hours late35 flights3.9%
- 2+ hours late16 flights1.8%
Scale runs 0% to 100%.
Share of 906 completed flights by arrival against schedule.
37 of 157 late departures made up the time and arrived on time, 24% of them. 43 flights left on time and still arrived late.
The worst days
Worst days for Delta on MSP to BWI
The latest arrival of the period was on 21 July 2026, 6 hours 41 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 July 2026 | 6 hours 41 minutes | National Airspace System |
| 31 July 2026 | 5 hours 30 minutes | Carrier |
| 16 April 2026 | 5 hours 16 minutes | Carrier |
| 16 March 2026 | 4 hours 49 minutes | Carrier |
| 8 March 2026 | 3 hours 57 minutes | Carrier |
Delay causes
Why Delta runs late on this route
Carrier accounts for 54% of the 9,888 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Carrier
- 29%National Airspace System
- 15%Late-arriving aircraft
- 2%Extreme weather
- 1%Security
The largest share of delay minutes, 54%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,313 of the 9,888 delay minutes reported here. The split is drawn from 9,888 reported delay minutes.
Cancellations sit at 1.52% against a national 1.89%, which is ordinary. Diversions add another 0.33%.
Connections and stage length
What a delay here costs
5.6% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 936 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg runs 84.4% on time across 923 flights, within 2 points 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. 923 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 Delta on MSP to BWI
Put together: treat all of this as provisional. 923 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 82.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 906 completed flights over 12 months sit behind that.
Related
Where to go next
- MSP to BWI, every carrier
- Delta on BWI to MSP, the return leg
- Southwest Airlines on MSP to BWI82.3%
- Delta Air Lines network-wide record
- Minneapolis-St Paul International (MSP) delay statistics
- Baltimore/Washington International Thurgood Marshall (BWI) delay statistics
- The best time of day to fly, according to 7.05 million flight records
- Worst months to fly in the US, ranked by the data
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.