Flight number record
DL 1678
Delta Air Lines · Bozeman to Minneapolis
- Route
- BZN → MSP
- Departs
- 06:00
- Flights
- 326
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1678, check with Delta Air Lines.
DL 1678 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 2.2 hours. That rests on 326 flights, with a median arrival 14 minutes early.
Set against the rest of the country, DL 1678's record is 17 points better than the US average of 77.3%. That gap is worth roughly 171 fewer late arrivals for every thousand flights.
Key figures
On time
94.4%
Arrivals under 15 minutes late, of 321 completed flights
Avg delay
133 min
Across delayed arrivals only, not all flights
Cancelled
1.23%
National rate is 1.89%
1 hour+ late
2.5%
National rate is 8.3%
These figures cover 326 flights between September 2025 and August 2026. The median arrival is 14 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.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When DL 1678 flies
DL 1678 flies BZN to MSP without a single fixed slot. Its most common scheduled departure was 06:00, used on 175 of 326 flights, with 05:58 (36 flights) next.
- Departs 06:00175 flights53.7%
- Departs 05:5836 flights11.0%
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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1678 runs 5 points better at 94.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 1678 next to BZN to MSP
Every carrier on BZN to MSP combined arrived on time 91.4% of the time across 807 flights, so DL 1678 is 3 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1678thin sample | 326 | 94.4% | 133 min | 1.23% | A |
| All Delta Air Lines on BZN–MSP | 807 | 91.4% | 93 min | 0.74% | A+ |
| All carriers on BZN–MSP | 807 | 91.4% | 93 min | 0.74% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1678 quarter by quarter
Quarter by quarter DL 1678 held fairly steady: 93.3% in Jul–Sep 2025, 92.3% in Oct–Dec 2025, 94.0% in Jan–Mar 2026, 95.5% in Apr–Jun 2026 and 96.7% in Jul–Sep 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202592 flights92.3%
- Jan–Mar 202651 flights94.0%
- Apr–Jun 202691 flights95.5%
- Jul–Sep 202662 flights96.7%
Scale runs 85% to 100%.
By weekday, DL 1678 did best on Tuesday at 100.0% on time and worst on Sunday at 87.0%. Each day rests on about 47 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1678 runs when it is late
DL 1678 often beats the schedule: 154 of 321 completed flights, 48%, arrived 15 minutes or more early. The 18 late arrivals split 7 under half an hour, 3 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early154 flights48.0%
- Within 15 min149 flights46.4%
- 15–29 min late7 flights2.2%
- 30–59 min late3 flights0.9%
- 1–2 hours late0 flights0.0%
- 2+ hours late8 flights2.5%
Scale runs 0% to 100%.
Share of 321 completed flights by arrival against schedule.
A late pushback is often recovered here: of 28 departures that left 15 minutes late or more, 12 still arrived on time. Only 2 left on time and still arrived late.
The worst days
Worst days for DL 1678
The latest arrival of the period was on 21 November 2025, 7 hours 52 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three 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 November 2025 | 7 hours 52 minutes | Extreme weather |
| 22 September 2025 | 6 hours 37 minutes | Carrier |
| 22 October 2025 | 4 hours 53 minutes | Carrier |
| 25 June 2026 | 4 hours 45 minutes | Carrier |
| 16 April 2026 | 4 hours 29 minutes | Extreme weather |
Delay causes
Why DL 1678 runs late
Carrier accounts for 64% of the 2,391 delay minutes carriers reported here, and the remaining four split what is left.
- 64%Carrier
- 32%Extreme weather
- 4%National Airspace System
Extreme weather accounts for 32% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 5.3 times the usual weather exposure. The split is drawn from 2,391 delay minutes reported on DL 1678.
Cancellations sit at 1.23% against a national 1.89%, which is ordinary. Diversions add another 0.31%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.5% 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.
The 874 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 same number turns up on two other city pairs in the data, including CHS to ATL (24) and VPS to ATL (1), but none flew often enough under DL 1678 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BZN to MSP only.
One caution: this is a thin sample. 326 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 1678
For a booking, DL 1678 has one of the better records a US domestic flight can show: 94.4% on time and 1.23% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- BZN to MSP, every carrier and departure
- MSP to BZN, the return direction
- Delta Air Lines 1226 on the same route88.8%
- 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
- Worst months to fly in the US, ranked by the data
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.