DL1237Delta Air Lines · FSD → ATL
live · 23m ago
Route confirmed Delta Air Lines

DL1237 Sioux FallsFSD · 05:30 AtlantaATL · 08:56

DL1237 by Delta Air Lines flies from Sioux Falls (FSD) to Atlanta (ATL) for the Fri, Sep 18 departure.

Right nowLanded in Atlanta · today
08:39

arrived at ATL · 17 min early

⚖ DL1237 typically leaves +6 and lands −17. The air wins minutes back.
Typical gate push+6 minmedian posted departure
Typical arrival−17 minmedian over 15 operations
Wins back in air~23 minmedian gate push vs arrival · how planes make up time → Cancellation0 in 15tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
09-18
+3 gate · −17 arrival
09-17
+1 gate · −14 arrival
09-16
+6 gate · −14 arrival
09-15
+9 gate · −19 arrival
09-14
+7 gate · −23 arrival
09-13
+4 gate · −19 arrival
09-12
+12 gate · +14 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival −17 min · 0 cancelled · 15 operations tracked

The route today

live boards
FSDSioux FallsModerate riskFSD delay board →
ATLAtlantaOn-time likelyATL delay board →
FSD→ATLevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
44%Chance of 15+ min delay
2.1%Chance of cancellation
+16 minAvg hub delay right now

Driven mainly by FSD (Sioux Falls), currently flying IFR (instrument). For this route and airline, under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

How DL1237 actually runs

Pro Flight Search has tracked every published board update for DL1237 across the FSD and ATL boards: schedule changes, gate pushes and actual clocks. Usually lands ~15 min early. Based on 13 confirmed landings · 12/13 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how DL1237 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
09-18FSD 05:30 05:33 (+3)ATL 08:56 08:39 (−17)
09-17FSD 05:30 05:31 (+1)ATL 08:56 08:42 (−14)
09-16FSD 05:30 05:36 (+6)ATL 08:56 08:42 (−14)
09-15FSD 05:30 05:39 (+9)ATL 08:56 08:37 (−19)
09-14FSD 05:30 05:37 (+7)ATL 08:56 08:33 (−23)
09-13FSD 05:30 05:34 (+4)ATL 08:56 08:37 (−19)
09-12FSD 05:30 05:42 (+12)ATL 08:56 09:10 (+14)
09-11FSD 05:30 05:52 (+22)ATL 08:56 08:55 (−1)
09-10FSD 05:30 05:31 (+1)ATL 08:56 08:31 (−25)
09-09FSD 05:30 (+0)ATL 08:56 08:39 (−17)
09-08FSD 05:30 06:37 (+67)ATL 08:56 09:40 (+44)
09-07FSD 05:30 05:39 (+9)ATL 09:08 08:45 (−23)
09-06FSD 05:30 05:29 (−1)ATL 09:08 08:24 (−44)
09-05FSD 05:30 05:53 (+23)ATL 09:08 08:51 (−17)
09-04FSD 05:30 05:34 (+4)ATL 09:08 08:34 (−34)

Aircraft

Recent tails: N319NB, N346NB, N370NB, N364NB.

Board clocks recorded as FSD and ATL published them.

Planning around DL1237? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

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Suggested citation

Pro Flight Search — DL1237 Sioux Falls to Atlanta on-time performance, measured from the FSD and ATL airport boards.

Canonical URL
https://proflightsearch.com/flight/DL1237
How we measure this →