Flight number record
DL 1635
Delta Air Lines · Kansas City to Minneapolis
- Route
- MCI → MSP
- Departs
- 06:23
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1635, check with Delta Air Lines.
DL 1635 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 365 flights, with a median arrival 16 minutes early.
Set against the rest of the country, DL 1635's record is 14 points better than the US average of 77.3%. That gap is worth roughly 137 fewer late arrivals for every thousand flights.
Key figures
On time
91.0%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
119 min
Across delayed arrivals only, not all flights
Cancelled
2.74%
National rate is 1.89%
1 hour+ late
3.4%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 16 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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Schedule
When DL 1635 flies
DL 1635 flies MCI to MSP without a single fixed slot. Its most common scheduled departure was 06:23, used on 73 of 365 flights, with 06:30 (59 flights) and 06:00 (50 flights) next.
- Departs 06:2373 flights20.0%
- Departs 06:3059 flights16.2%
- Departs 06:0050 flights13.7%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 06:23 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1635 runs level with that at 91.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1635 next to MCI to MSP
Every carrier on MCI to MSP combined arrived on time 83.5% of the time across 1,088 flights, so DL 1635 is 8 points ahead of it. Delta flew 760 flights on the same city pair under all its flight numbers, including this one, and those ran 86.2% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1635 | 365 | 91.0% | 119 min | 2.74% | A |
| All Delta Air Lines on MCI–MSP | 760 | 86.2% | 105 min | 1.45% | A |
| All carriers on MCI–MSP | 1,088 | 83.5% | 95 min | 1.56% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1635 quarter by quarter
DL 1635 did not run the same all year. Its best quarter was Oct–Dec 2025 at 93.3% on time and its weakest Jul–Sep 2025 at 83.3%, a swing of 10 points on roughly 73 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights83.3%
- Oct–Dec 202592 flights93.3%
- Jan–Mar 202690 flights93.1%
- Apr–Jun 202691 flights92.0%
- Jul–Sep 202662 flights86.9%
Scale runs 75% to 100%.
By weekday, DL 1635 ranged from 86.5% on Monday to 96.1% on Saturday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1635 runs when it is late
DL 1635 often beats the schedule: 196 of 355 completed flights, 55%, arrived 15 minutes or more early. The 32 late arrivals split 12 under half an hour, 8 between 30 and 60 minutes, and 12 an hour or more.
- 15+ min early196 flights55.2%
- Within 15 min127 flights35.8%
- 15–29 min late12 flights3.4%
- 30–59 min late8 flights2.3%
- 1–2 hours late4 flights1.1%
- 2+ hours late8 flights2.3%
Scale runs 0% to 100%.
Share of 355 completed flights by arrival against schedule.
4 of 27 late departures made up the time and arrived on time, 15% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 1635
The latest arrival of the period was on 2 December 2025, 13 hours 6 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 |
|---|---|---|
| 2 December 2025 | 13 hours 6 minutes | Carrier |
| 1 September 2025 | 7 hours 52 minutes | Carrier |
| 13 November 2025 | 7 hours 1 minute | Late-arriving aircraft |
| 10 April 2026 | 4 hours 50 minutes | Carrier |
| 9 April 2026 | 4 hours 39 minutes | Carrier |
Delay causes
Why DL 1635 runs late
Carrier accounts for 68% of the 3,804 delay minutes carriers reported here, and the remaining four split what is left.
- 68%Carrier
- 23%Late-arriving aircraft
- 7%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 68%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,582 of the 3,804 delay minutes reported here. The split is drawn from 3,804 delay minutes reported on DL 1635.
Cancellations run at 2.74%, against 1.89% nationally. That is roughly one flight in 40 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 routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.4% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
Every one of the 365 flights under DL 1635 in the data flew MCI to MSP. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 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 DL 1635
For a booking, the cancellation rate is the figure to plan around on DL 1635: 2.74% of its 365 scheduled flights did not operate. A late arrival costs close to two hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- MCI to MSP, every carrier and departure
- MSP to MCI, the return direction
- Kansas City International (MCI) delay statistics
- Minneapolis-St Paul International (MSP) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- What a cancellation rate actually tells you (and what it hides)
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.