Flight number record

DL 664

Delta Air Lines · Atlanta to Orlando

Route: ATL → MCO
Departs: 10:25
Flights: 363
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 664, check with Delta Air Lines.

DL 664 lands a B, 6 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 about an hour on average. That is a workable record, not a spotless one. That rests on 363 flights, with a median arrival 4 minutes early.

Set against the rest of the country, DL 664's record is 6 points better than the US average of 77.6%. That gap is worth roughly 59 fewer late arrivals for every thousand flights.

On time

83.5%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

1.65%

National rate is 1.81%

1 hour+ late

3.9%

National rate is 8.1%

These figures cover 363 flights between July 2025 and June 2026. The median arrival is 4 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 664 flies

DL 664 flies ATL to MCO without a single fixed slot. Its most common scheduled departure was 10:25, used on 153 of 363 flights, with 10:45 (67 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:25153 flights42.1%
Departs 10:4567 flights18.5%

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 10:25 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 664 runs level with that at 83.5%. 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 664 next to ATL to MCO

Every carrier on ATL to MCO combined arrived on time 70.7% of the time across 8,211 flights, so DL 664 is 13 points ahead of it. Delta flew 5,465 flights on the same city pair under all its flight numbers, including this one, and those ran 70.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 2 points.

DL 664 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 664thin sample	363	83.5%	64 min	1.65%	B
All Delta Air Lines on ATL–MCO	5,465	70.7%	64 min	1.17%	C
All carriers on ATL–MCO	8,211	70.7%	73 min	1.36%	C
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 664 quarter by quarter

Quarter by quarter DL 664 held fairly steady: 86.7% in Jul–Sep 2025, 85.4% in Oct–Dec 2025, 80.5% in Jan–Mar 2026 and 81.3% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202590 flights86.7%
Oct–Dec 202592 flights85.4%
Jan–Mar 202690 flights80.5%
Apr–Jun 202691 flights81.3%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 664 did best on Sunday at 89.8% on time and worst on Saturday at 76.0%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 664 runs late

One category carries most of the weight here. Carrier accounts for 55% of the 3,748 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
55%
National Airspace System
36%
Late-arriving aircraft
7%
Extreme weather
2%

36% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,358 minutes out of 3,748, against a national NAS share of 21%. The split is drawn from 3,748 delay minutes reported on DL 664.

Cancellations sit at 1.65% 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 3.9% 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.

DL 664 is not only a ATL to MCO flight. It also flew MCO to ATL (363 flights, 81.7% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 363 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.

Other routes flown as DL 664
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
MCO to ATLthin sample	363	81.7%	76 min	1.65%	B

What to do with this

Booking DL 664

For a booking, read DL 664 as 83.5% on time with 1.65% cancelled over 363 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