Flight number record

DL 2644

Delta Air Lines · Minneapolis to Houston

Route: MSP → IAH
Departs: 14:45
Flights: 303
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2644, check with Delta Air Lines.

DL 2644 lands a B+, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 303 flights, with a median arrival 5 minutes early.

On time

76.4%

Arrivals under 15 minutes late, of 297 completed flights

Avg delay

60 min

Across delayed arrivals only, not all flights

Cancelled

0.66%

National rate is 1.81%

1 hour+ late

9.8%

National rate is 8.1%

These figures cover 303 flights between July 2025 and June 2026. Beyond the headline rate, 9.8% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When DL 2644 flies

DL 2644 flies MSP to IAH without a single fixed slot. Its most common scheduled departure was 14:45, used on 77 of 303 flights, with 12:50 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:4577 flights25.4%
Departs 12:5036 flights11.9%

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 14:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 2644 runs 4 points better at 76.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 2644 next to MSP to IAH

Every carrier on MSP to IAH combined arrived on time 80.9% of the time across 1,835 flights, so DL 2644 is 5 points behind it. Delta flew 1,272 flights on the same city pair under all its flight numbers, including this one, and those ran 77.8% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 5 points.

DL 2644 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2644thin sample	303	76.4%	60 min	0.66%	B+
All Delta Air Lines on MSP–IAH	1,272	77.8%	60 min	0.94%	B+
All carriers on MSP–IAH	1,835	80.9%	61 min	0.98%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2644 quarter by quarter

DL 2644 did not run the same all year. Its best quarter was Jan–Mar 2026 at 83.3% on time and its weakest Oct–Dec 2025 at 70.5%, a swing of 13 points on roughly 76 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 202586 flights75.6%
Oct–Dec 202582 flights70.5%
Jan–Mar 202661 flights83.3%
Apr–Jun 202674 flights78.1%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2644 did best on Thursday at 85.4% on time and worst on Sunday at 59.0%. Each day rests on about 43 flights, so a gap of 26 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2644 runs late

One category carries most of the weight here. Carrier accounts for 45% of the 4,212 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
45%
National Airspace System
35%
Late-arriving aircraft
18%
Extreme weather
1%

The largest share of delay minutes, 45%, 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 1,911 of the 4,212 delay minutes reported here. The split is drawn from 4,212 delay minutes reported on DL 2644.

Cancellations are rare at 0.66%, below the national 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.8% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The 1,034 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 IAH to MSP (16) and DTW to BHM (3), but none flew often enough under DL 2644 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MSP to IAH only.

One caution: this is a thin sample. 303 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 2644

For a booking, read DL 2644 as 76.4% on time with 0.66% cancelled over 303 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