DL4129 MinneapolisMSP WashingtonIAD · 23:21
DL4129 by Delta Air Lines flies from Minneapolis (MSP) to Washington (IAD) for the Wed, Aug 19 departure.
arrival expected at IAD · 26 min early
board checked 61m ago · checking again in 45s
Where the minutes go
last 7 operations · gate push → arrivalThe 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 operationmedian arrival −6 min · 0 cancelled · 13 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at MSP and IAD are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. 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 departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Minneapolis to Washington flights today
same route · Delta Air LinesIf DL4129 is cancelled, these are the other Delta Air Lines nonstop flights from Minneapolis to Washington on the same day, with scheduled departure times in MSP local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How DL4129 actually runs
Pro Flight Search has tracked every published board update for DL4129 across the MSP and IAD boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 13 confirmed landings · 9/13 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how DL4129 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N251SY, N257SY, N310SY, N603CZ.
Board clocks recorded as MSP and IAD published them.
Planning around DL4129? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL4129 Minneapolis to Washington on-time performance, measured from the MSP and IAD airport boards.
https://proflightsearch.com/flight/DL4129
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