Flight number record

DL 1605

Delta Air Lines · Minneapolis to St. Louis

Route: MSP → STL
Departs: 15:15
Flights: 283
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1605, check with Delta Air Lines.

DL 1605 lands a B, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 283 flights, with a median arrival 10 minutes early.

Set against the rest of the country, DL 1605's record is 5 points better than the US average of 77.6%. That gap is worth roughly 49 fewer late arrivals for every thousand flights.

On time

82.5%

Arrivals under 15 minutes late, of 280 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

1.06%

National rate is 1.81%

1 hour+ late

6.1%

National rate is 8.1%

These figures cover 283 flights between July 2025 and June 2026. The median arrival is 10 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 1605 flies

DL 1605 flies MSP to STL without a single fixed slot. Its most common scheduled departure was 15:15, used on 198 of 283 flights, with 15:30 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:15198 flights70.0%
Departs 15:3031 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 15:15 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 1605 runs 10 points better at 82.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1605 next to MSP to STL

Every carrier on MSP to STL combined arrived on time 79.5% of the time across 1,896 flights, so DL 1605 is 3 points ahead of it. Delta flew 886 flights on the same city pair under all its flight numbers, including this one, and those ran 79.5% on time. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 1605 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1605thin sample	283	82.5%	69 min	1.06%	B
All Delta Air Lines on MSP–STL	886	79.5%	68 min	1.24%	B
All carriers on MSP–STL	1,896	79.5%	68 min	0.95%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1605 quarter by quarter

DL 1605 did not run the same all year. Its best quarter was Apr–Jun 2026 at 89.7% on time and its weakest Oct–Dec 2025 at 79.2%, a swing of 11 points on roughly 71 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 202576 flights82.9%
Oct–Dec 202579 flights79.2%
Jan–Mar 202670 flights79.7%
Apr–Jun 202658 flights89.7%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1605 did best on Wednesday at 89.1% on time and worst on Monday at 70.5%. Each day rests on about 40 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1605 runs late

One category carries most of the weight here. Carrier accounts for 52% of the 3,363 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
52%
Late-arriving aircraft
30%
National Airspace System
12%
Extreme weather
7%

The largest share of delay minutes, 52%, 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 1,742 of the 3,363 delay minutes reported here. The split is drawn from 3,363 delay minutes reported on DL 1605.

Cancellations sit at 1.06% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

6.1% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The same number turns up on six other city pairs in the data, including STL to MSP (55), JNU to SEA (23) and ATL to JAN (16), but none flew often enough under DL 1605 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MSP to STL only.

One caution: this is a thin sample. 283 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 1605

For a booking, read DL 1605 as 82.5% on time with 1.06% cancelled over 283 flights. Those are rates from the past twelve months, not a forecast for any particular 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