Flight number record
DL 2137
Delta Air Lines · Indianapolis to Salt Lake City
- Route
- IND → SLC
- Departs
- 06:35
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2137, check with Delta Air Lines.
DL 2137 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 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 40 minutes. That rests on 364 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 2137's record is 13 points better than the US average of 77.3%. That gap is worth roughly 127 fewer late arrivals for every thousand flights.
Key figures
On time
90.0%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
38 min
Across delayed arrivals only, not all flights
Cancelled
1.37%
National rate is 1.89%
1 hour+ late
1.7%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 9 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 2137 flies
DL 2137 flies IND to SLC without a single fixed slot. Its most common scheduled departure was 06:35, used on 62 of 364 flights, with 07:00 (51 flights) and 07:35 (41 flights) next.
- Departs 06:3562 flights17.0%
- Departs 07:0051 flights14.0%
- Departs 07:3541 flights11.3%
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 06:35 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 2137 runs level with that at 90.0%. 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 2137 next to IND to SLC
Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2137thin sample | 364 | 90.0% | 38 min | 1.37% | A |
| All Delta Air Lines on IND–SLCthin sample | 364 | 90.0% | 38 min | 1.37% | A |
| All carriers on IND–SLCthin sample | 364 | 90.0% | 38 min | 1.37% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2137 quarter by quarter
DL 2137 did not run the same all year. Its best quarter was Jul–Sep 2026 at 96.8% on time and its weakest Jan–Mar 2026 at 79.3%, a swing of 18 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 flights96.7%
- Oct–Dec 202591 flights88.8%
- Jan–Mar 202690 flights79.3%
- Apr–Jun 202691 flights94.5%
- Jul–Sep 202662 flights96.8%
Scale runs 70% to 100%.
By weekday, DL 2137 did best on Sunday at 94.0% on time and worst on Monday at 80.8%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2137 runs when it is late
DL 2137 often beats the schedule: 121 of 359 completed flights, 34%, arrived 15 minutes or more early. Most of the lateness is short. 22 of the 36 late arrivals were under half an hour behind, and 6 reached an hour or more.
- 15+ min early121 flights33.7%
- Within 15 min202 flights56.3%
- 15–29 min late22 flights6.1%
- 30–59 min late8 flights2.2%
- 1–2 hours late5 flights1.4%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
Only 14 of 359 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for DL 2137
The latest arrival of the period was on 2 March 2026, 2 hours 24 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 |
|---|---|---|
| 2 March 2026 | 2 hours 24 minutes | Extreme weather |
| 11 November 2025 | 1 hour 36 minutes | Carrier |
| 26 November 2025 | 1 hour 27 minutes | Carrier |
| 28 January 2026 | 1 hour 24 minutes | Carrier |
| 12 December 2025 | 1 hour 7 minutes | National Airspace System |
Delay causes
Why DL 2137 runs late
National Airspace System accounts for 53% of the 1,355 delay minutes carriers reported here, and the remaining four split what is left.
- 53%National Airspace System
- 38%Carrier
- 10%Extreme weather
The largest share of delay minutes, 38%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 509 of the 1,355 delay minutes reported here. The split is drawn from 1,355 delay minutes reported on DL 2137.
Cancellations sit at 1.37% against a national 1.89%, 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 1.7% 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 1,355 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 364 flights under DL 2137 in the data flew IND to SLC. 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. 364 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 2137
For a booking, DL 2137 has one of the better records a US domestic flight can show: 90.0% on time and 1.37% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- Indianapolis International (IND) delay statistics
- Salt Lake City International (SLC) 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
- The best time of day to fly, according to 7.05 million flight records
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.