Flight number record

DL 1678

Delta Air Lines · Bozeman to Minneapolis

Route: BZN → MSP
Departs: 06:00
Flights: 326
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 16 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 2.4 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 16 points better than the US average of 77.6%. That gap is worth roughly 159 fewer late arrivals for every thousand flights.

On time

93.5%

Arrivals under 15 minutes late, of 322 completed flights

Avg delay

144 min

Across delayed arrivals only, not all flights

Cancelled

1.23%

National rate is 1.81%

1 hour+ late

3.1%

National rate is 8.1%

These figures cover 326 flights between July 2025 and June 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.

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 190 of 326 flights, with 05:58 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:00190 flights58.3%
Departs 05:5836 flights11.0%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 4 points better at 93.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 1678 next to BZN to MSP

Every carrier on BZN to MSP combined arrived on time 89.1% of the time across 805 flights, so DL 1678 is 4 points ahead of it. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 12 points.

DL 1678 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1678thin sample	326	93.5%	144 min	1.23%	A
All Delta Air Lines on BZN–MSP	805	89.1%	90 min	0.62%	A+
All carriers on BZN–MSP	805	89.1%	90 min	0.62%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1678 quarter by quarter

Quarter by quarter DL 1678 held fairly steady: 92.4% in Jul–Sep 2025, 92.3% in Oct–Dec 2025, 94.0% in Jan–Mar 2026 and 95.5% in Apr–Jun 2026. A spread of 3 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights92.4%
Oct–Dec 202592 flights92.3%
Jan–Mar 202651 flights94.0%
Apr–Jun 202691 flights95.5%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

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.

Delay causes

Why DL 1678 runs late

One category carries most of the weight here. Carrier accounts for 70% of the 3,028 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
70%
Extreme weather
25%
National Airspace System
4%

Extreme weather accounts for 25% 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 4.1 times the usual weather exposure. The split is drawn from 3,028 delay minutes reported on DL 1678.

Cancellations sit at 1.23% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.1% land an hour or more behind schedule, against 8.1% 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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: 93.5% on time and 1.23% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures