Flight number record

DL 1227

Delta Air Lines · Tampa to Atlanta

Route: TPA → ATL
Departs: 11:01
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1227, check with Delta Air Lines.

DL 1227 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 365 flights, with a median arrival 11 minutes early.

Set against the rest of the country, DL 1227's record is 7 points better than the US average of 77.6%. That gap is worth roughly 71 fewer late arrivals for every thousand flights.

On time

84.7%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

54 min

Across delayed arrivals only, not all flights

Cancelled

1.37%

National rate is 1.81%

1 hour+ late

4.5%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 11 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 1227 flies

DL 1227 flies TPA to ATL without a single fixed slot. Its most common scheduled departure was 11:01, used on 97 of 365 flights, with 11:15 (46 flights) and 11:14 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:0197 flights26.6%
Departs 11:1546 flights12.6%
Departs 11:1438 flights10.4%

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 11:01 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 1227 runs 6 points better at 84.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1227 next to TPA to ATL

Every carrier on TPA to ATL combined arrived on time 79.9% of the time across 6,138 flights, so DL 1227 is 5 points ahead of it. Delta flew 4,413 flights on the same city pair under all its flight numbers, including this one, and those ran 81.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 3 points.

DL 1227 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1227	365	84.7%	54 min	1.37%	B
All Delta Air Lines on TPA–ATL	4,413	81.7%	75 min	1.22%	B
All carriers on TPA–ATL	6,138	79.9%	71 min	1.25%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1227 quarter by quarter

DL 1227 did not run the same all year. Its best quarter was Apr–Jun 2026 at 91.1% on time and its weakest Jul–Sep 2025 at 78.3%, a swing of 13 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 flights78.3%
Oct–Dec 202592 flights88.9%
Jan–Mar 202690 flights80.5%
Apr–Jun 202691 flights91.1%

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

By weekday, DL 1227 did best on Tuesday at 92.5% on time and worst on Sunday at 74.0%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1227 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 2,963 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.

Late-arriving aircraft
53%
Carrier
22%
National Airspace System
22%
Extreme weather
3%

53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,963 reported delay minutes here, that single category outweighs weather by 21 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,963 delay minutes reported on DL 1227.

Cancellations sit at 1.37% against a national 1.81%, which is ordinary. Diversions add another 0.27%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.5% 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 1227 is not only a TPA to ATL flight. It also flew ATL to TPA (365 flights, 89.7% 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. 365 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 1227
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
ATL to TPA	365	89.7%	54 min	1.10%	A

What to do with this

Booking DL 1227

For a booking, read DL 1227 as 84.7% on time with 1.37% cancelled over 365 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