Route
STL → DCA
St. Louis Lambert International Airport Ronald Reagan Washington National Airport
How punctual is this route?
- On-time arrivals
- 73.7%
- Less than 15 minutes late
- Cancelled
- 3.2%
- Of scheduled flights
- Average delay when late
- 78 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,417
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 37%
- Airline (crew, maintenance, cleaning) 36%
- Air traffic control & airport 24%
- Extreme weather 3%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 76.4% | 217 |
| October 2025 | 79.3% | 223 |
| November 2025 | 73.6% | 208 |
| December 2025 | 74.9% | 203 |
| January 2026 | 76.2% | 199 |
| February 2026 | 73.7% | 179 |
| March 2026 | 68.3% | 200 |
| April 2026 | 81.8% | 193 |
| May 2026 | 73.2% | 197 |
| June 2026 | 64.6% | 198 |
| July 2026 | 65.4% | 202 |
| August 2026 | 76.0% | 198 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 1,404 | 72.7% | 1.5% | 62 min |
| OH | 621 | 74.5% | 6.4% | 118 min |
| Republic Airways | 242 | 76.1% | 5.0% | 84 min |
| American Airlines | 128 | 77.4% | 3.1% | 95 min |
| Envoy Air | 22 | 72.7% | 0.0% | 39 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
OH5398
38% late · 73 flights
-
OH5541
31% late · 70 flights
-
OH5015
16% late · 68 flights
-
YX4458
20% late · 68 flights
-
WN4425
25% late · 64 flights
-
WN2333
18% late · 60 flights
-
WN3907
51% late · 60 flights
-
WN3908
56% late · 60 flights
-
WN4426
38% late · 60 flights
-
OH5288
30% late · 58 flights
-
WN4450
9% late · 58 flights
-
WN694
23% late · 58 flights
-
WN964
13% late · 58 flights
-
OH5413
24% late · 54 flights
-
WN3905
16% late · 51 flights
-
WN4451
30% late · 50 flights
-
WN1370
17% late · 42 flights
-
WN2513
25% late · 42 flights
-
OH5582
49% late · 41 flights
-
OH5503
21% late · 39 flights
-
OH5454
11% late · 38 flights
-
YX4769
33% late · 38 flights
-
OH5411
5% late · 37 flights
-
WN2407
28% late · 36 flights
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