Flight number record
DL 1615
Delta Air Lines · Spokane to Minneapolis
- Route
- GEG → MSP
- Departs
- 06:00
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1615, check with Delta Air Lines.
DL 1615 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 about 2.2 hours. That rests on 365 flights, with a median arrival 16 minutes early.
Set against the rest of the country, DL 1615's record is 14 points better than the US average of 77.3%. That gap is worth roughly 136 fewer late arrivals for every thousand flights.
Key figures
On time
90.9%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
131 min
Across delayed arrivals only, not all flights
Cancelled
0.82%
National rate is 1.89%
1 hour+ late
4.1%
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 1615 flies
DL 1615 flies GEG to MSP without a single fixed slot. Its most common scheduled departure was 06:00, used on 94 of 365 flights, with 07:00 (57 flights) and 06:45 (53 flights) next.
- Departs 06:0094 flights25.8%
- Departs 07:0057 flights15.6%
- Departs 06:4553 flights14.5%
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 1615 runs level with that at 90.9%. 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 1615 next to GEG to MSP
Every carrier on GEG to MSP combined arrived on time 90.2% of the time across 774 flights, so DL 1615 is about level with it. 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 1615 | 365 | 90.9% | 131 min | 0.82% | A+ |
| All Delta Air Lines on GEG–MSP | 774 | 90.2% | 130 min | 0.78% | A+ |
| All carriers on GEG–MSP | 774 | 90.2% | 130 min | 0.78% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1615 quarter by quarter
Quarter by quarter DL 1615 held fairly steady: 96.7% in Jul–Sep 2025, 87.9% in Oct–Dec 2025, 93.3% in Jan–Mar 2026, 91.1% in Apr–Jun 2026 and 88.7% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202592 flights87.9%
- Jan–Mar 202690 flights93.3%
- Apr–Jun 202691 flights91.1%
- Jul–Sep 202662 flights88.7%
Scale runs 80% to 100%.
By weekday, DL 1615 ranged from 84.6% on Saturday to 94.1% on Wednesday. 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 1615 runs when it is late
DL 1615 often beats the schedule: 203 of 362 completed flights, 56%, arrived 15 minutes or more early. The 33 late arrivals split 12 under half an hour, 6 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early203 flights56.1%
- Within 15 min126 flights34.8%
- 15–29 min late12 flights3.3%
- 30–59 min late6 flights1.7%
- 1–2 hours late6 flights1.7%
- 2+ hours late9 flights2.5%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
4 of 28 late departures made up the time and arrived on time, 14% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 1615
The latest arrival of the period was on 4 November 2025, 12 hours 31 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 |
|---|---|---|
| 4 November 2025 | 12 hours 31 minutes | Carrier |
| 3 December 2025 | 8 hours | Carrier |
| 11 December 2025 | 6 hours 23 minutes | Carrier |
| 1 August 2026 | 5 hours 45 minutes | Extreme weather |
| 17 November 2025 | 5 hours 8 minutes | Carrier |
Delay causes
Why DL 1615 runs late
Carrier accounts for 84% of the 4,307 delay minutes carriers reported here, and the remaining four split what is left.
- 84%Carrier
- 9%Extreme weather
- 7%National Airspace System
- 0%Late-arriving aircraft
The largest share of delay minutes, 84%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,632 of the 4,307 delay minutes reported here. The split is drawn from 4,307 delay minutes reported on DL 1615.
Cancellations are rare at 0.82%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.1% 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 1,175 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.
Every one of the 365 flights under DL 1615 in the data flew GEG 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 1615
For a booking, DL 1615 has one of the better records a US domestic flight can show: 90.9% on time and 0.82% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- GEG to MSP, every carrier and departure
- MSP to GEG, the return direction
- Delta Air Lines 2437 on the same route89.8%
- 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.