Flight number record

DL 2137

Delta Air Lines · Indianapolis to Salt Lake City

Route: IND → SLC
Departs: 06:35
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 40 minutes. That rests on 364 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 2137's record is 11 points better than the US average of 77.6%. That gap is worth roughly 107 fewer late arrivals for every thousand flights.

On time

88.3%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

39 min

Across delayed arrivals only, not all flights

Cancelled

1.37%

National rate is 1.81%

1 hour+ late

2.2%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 8 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 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 08:05 (56 flights) and 07:00 (51 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:3562 flights17.0%
Departs 08:0556 flights15.4%
Departs 07:0051 flights14.0%

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 06:35 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 88.3%. 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 2137 next to IND to SLC

Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 7 points.

DL 2137 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2137thin sample	364	88.3%	39 min	1.37%	A
All Delta Air Lines on IND–SLCthin sample	364	88.3%	39 min	1.37%	A
All carriers on IND–SLCthin sample	364	88.3%	39 min	1.37%	A
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2137 quarter by quarter

DL 2137 did not run the same all year. Its best quarter was Apr–Jun 2026 at 94.5% on time and its weakest Jan–Mar 2026 at 79.3%, a swing of 15 points on roughly 91 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 202592 flights90.2%
Oct–Dec 202591 flights88.8%
Jan–Mar 202690 flights79.3%
Apr–Jun 202691 flights94.5%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2137 ranged from 80.4% on Monday to 92.3% on Wednesday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 2137 runs late

One category carries most of the weight here. Carrier accounts for 51% of the 1,630 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
51%
National Airspace System
41%
Extreme weather
8%

The largest share of delay minutes, 51%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 826 of the 1,630 delay minutes reported here. The split is drawn from 1,630 delay minutes reported on DL 2137.

Cancellations sit at 1.37% 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 2.2% 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 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. 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.

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: 88.3% on time and 1.37% 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