AA4645American Airlines · STL → DCA
live · 19m ago
Route confirmed American Airlines

AA4645 St LouisSTL · 10:48 WashingtonDCA · 13:59

AA4645 by American Airlines flies from St Louis (STL) to Washington (DCA).

Right nowNext departure tomorrow Operates daily
10:48

scheduled from STL

⚖ AA4645 typically leaves +6 and lands −22. The air wins minutes back.
Typical gate push+6 minmedian posted departure
Typical arrival−22 minmedian over 13 operations
Wins back in air~28 minmedian gate push vs arrival · how planes make up time → Cancellation0 in 13tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
10-31
+13 gate · −13 arrival
10-30
+13 gate · −13 arrival
10-29
+5 gate · −31 arrival
10-28
+4 gate · −21 arrival
10-27
+2 gate · −26 arrival
10-26
+20 gate · −14 arrival
10-25
+3 gate · −24 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 −22 min · 0 cancelled · 13 operations tracked

The route today

live boards
STLSt LouisOn-time likelySTL delay board →
DCAWashingtonOn-time likelyDCA delay board →
STL→DCAevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
40%Chance of 15+ min delay
3.1%Chance of cancellation
+8 minTypical airport delay in this weather

Conditions at STL and DCA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records 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 →

Tomorrow on this route

Forecast

St Louis to Washington with American Airlines · Sun 1 Nov, local date

Outlook: about usual
Chance a departure is cancelled
0.8%0.9× usual
Chance a departure leaves 60+ min late
7.3%1.2× usual

Forecast weather: 89% chance of rain at St Louis

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · About 3 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

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.

Other St Louis to Washington flights today

same route · American Airlines
AA4678departs 07:03
AA2030departs 17:08

If AA4645 is cancelled, these are the other American Airlines nonstop flights from St Louis to Washington on the same day, with scheduled departure times in STL local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How AA4645 actually runs

Pro Flight Search has tracked every published board update for AA4645 across the STL and DCA boards: schedule changes, gate pushes and actual clocks. Usually lands ~20 min early. Based on 13 confirmed landings · 13/13 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 AA4645 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
10-31STL 10:48 11:01 (+13)DCA 13:59 13:46 (−13)
10-30STL 10:48 11:01 (+13)DCA 13:59 13:46 (−13)
10-29STL 10:48 10:53 (+5)DCA 13:59 13:28 (−31)
10-28STL 10:48 10:52 (+4)DCA 13:59 13:38 (−21)
10-27STL 10:48 10:50 (+2)DCA 13:59 13:33 (−26)
10-26STL 10:48 11:08 (+20)DCA 13:59 13:45 (−14)
10-25STL 10:02 10:05 (+3)DCA 13:14 12:50 (−24)
10-23STL 10:48 10:52 (+4)DCA 13:59 13:35 (−24)
10-22STL 10:48 10:50 (+2)DCA 13:59 13:37 (−22)
10-21STL 10:48 10:57 (+9)DCA 13:59 13:40 (−19)
10-20STL 10:48DCA 13:59 13:35 (−24)
10-19STL 10:48 11:10 (+22)DCA 13:59 13:54 (−5)
10-18STL 10:02 10:08 (+6)DCA 13:14 12:49 (−25)

Aircraft

Recent tails: N108HQ, N116HQ, N137HQ, N101HQ.

Board clocks recorded as STL and DCA published them.

Planning around AA4645? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: AA4645 St Louis to Washington on-time performance, measured from the STL and DCA airport boards.

Canonical URL
https://proflightsearch.com/flight/AA4645
How we measure this →