Flight number record
DL 2020
Delta Air Lines · Oklahoma City to Atlanta
- Route
- OKC → ATL
- Departs
- 14:32
- Flights
- 307
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2020, check with Delta Air Lines.
DL 2020 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 77.3%. When something does go wrong the average delay runs about an hour. That rests on 307 flights, with a median arrival 18 minutes early.
Set against the rest of the country, DL 2020's record is 7 points better than the US average of 77.3%. That gap is worth roughly 68 fewer late arrivals for every thousand flights.
Key figures
On time
84.1%
Arrivals under 15 minutes late, of 302 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
1.30%
National rate is 1.89%
1 hour+ late
5.3%
National rate is 8.3%
These figures cover 307 flights between September 2025 and August 2026. The median arrival is 18 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.
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Schedule
When DL 2020 flies
DL 2020 flies OKC to ATL without a single fixed slot. Its most common scheduled departure was 14:32, used on 31 of 307 flights.
- Departs 14:3231 flights10.1%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 14:32 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 2020 runs 12 points better at 84.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 2020 next to OKC to ATL
Every carrier on OKC to ATL combined arrived on time 86.5% of the time across 1,813 flights, so DL 2020 is 2 points behind it. Delta flew 1,723 flights on the same city pair under all its flight numbers, including this one, and those ran 88.3% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2020thin sample | 307 | 84.1% | 64 min | 1.30% | B |
| All Delta Air Lines on OKC–ATL | 1,723 | 88.3% | 96 min | 2.61% | A |
| All carriers on OKC–ATL | 1,813 | 86.5% | 97 min | 2.65% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2020 quarter by quarter
DL 2020 did not run the same all year. Its best quarter was Jan–Mar 2026 at 90.0% on time and its weakest Jul–Sep 2026 at 75.4%, a swing of 15 points on roughly 77 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 202518 flights—
- Oct–Dec 202572 flights79.2%
- Jan–Mar 202683 flights90.0%
- Apr–Jun 202676 flights86.7%
- Jul–Sep 202658 flights75.4%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2020 did best on Thursday at 93.5% on time and worst on Sunday at 78.7%. Each day rests on about 44 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2020 runs when it is late
DL 2020 often beats the schedule: 179 of 302 completed flights, 59%, arrived 15 minutes or more early. The 48 late arrivals split 18 under half an hour, 14 between 30 and 60 minutes, and 16 an hour or more.
- 15+ min early179 flights59.3%
- Within 15 min75 flights24.8%
- 15–29 min late18 flights6.0%
- 30–59 min late14 flights4.6%
- 1–2 hours late9 flights3.0%
- 2+ hours late7 flights2.3%
Scale runs 0% to 100%.
Share of 302 completed flights by arrival against schedule.
14 of 59 late departures made up the time and arrived on time, 24% of them. Only 3 left on time and still arrived late.
The worst days
Worst days for DL 2020
The latest arrival of the period was on 8 November 2025, 5 hours 46 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across November, June, January, August and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 November 2025 | 5 hours 46 minutes | National Airspace System |
| 12 June 2026 | 3 hours 19 minutes | Late-arriving aircraft |
| 16 January 2026 | 3 hours 17 minutes | Carrier |
| 15 August 2026 | 3 hours 5 minutes | Carrier |
| 19 July 2026 | 2 hours 57 minutes | National Airspace System |
Delay causes
Why DL 2020 runs late
Late-arriving aircraft accounts for 56% of the 3,059 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Late-arriving aircraft
- 23%Carrier
- 20%National Airspace System
- 1%Extreme weather
56% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,059 reported delay minutes here, that single category outweighs weather by 43 to one. The split is drawn from 3,059 delay minutes reported on DL 2020.
Cancellations sit at 1.30% against a national 1.89%, which is ordinary. Diversions add another 0.33%.
Connections and routes
What a delay on this flight costs
5.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 761 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.
DL 2020 is not only a OKC to ATL flight. It also flew ATL to OKC (298 flights, 82.4% 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. 307 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| ATL to OKCthin sample | 298 | 82.4% | 52 min | 1.01% | B |
What to do with this
Booking DL 2020
For a booking, read DL 2020 as 84.1% on time with 1.30% cancelled over 307 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- OKC to ATL, every carrier and departure
- ATL to OKC, the return direction
- Delta Air Lines 1184 on the same route92.4%
- Delta Air Lines 1158 on the same route91.1%
- Delta Air Lines 2490 on the same route89.8%
- Delta Air Lines 2862 on the same route81.9%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.