Route
BWI → DEN
Baltimore/Washington International Thurgood Marshall Airport Denver International Airport
How punctual is this route?
- On-time arrivals
- 76.0%
- Less than 15 minutes late
- Cancelled
- 1.4%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,784
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 34%
- Late-arriving aircraft 31%
- Airline (crew, maintenance, cleaning) 30%
- Extreme weather 4%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 83.8% | 266 |
| October 2025 | 89.2% | 269 |
| November 2025 | 83.8% | 237 |
| December 2025 | 61.9% | 243 |
| January 2026 | 78.0% | 200 |
| February 2026 | 78.5% | 184 |
| March 2026 | 69.6% | 211 |
| April 2026 | 86.1% | 202 |
| May 2026 | 78.3% | 208 |
| June 2026 | 62.2% | 248 |
| July 2026 | 77.9% | 264 |
| August 2026 | 62.2% | 252 |
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 | 1,919 | 72.2% | 1.8% | 55 min |
| United Airlines | 840 | 84.5% | 0.5% | 66 min |
| Frontier Airlines | 25 | 72.0% | 0.0% | 54 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA2412
12% late · 328 flights
-
UA2012
21% late · 306 flights
-
UA2057
7% late · 110 flights
-
WN939
55% late · 84 flights
-
WN938
42% late · 67 flights
-
WN937
52% late · 64 flights
-
WN935
16% late · 62 flights
-
WN1130
14% late · 58 flights
-
WN878
34% late · 58 flights
-
WN275
15% late · 52 flights
-
WN2471
34% late · 50 flights
-
WN468
27% late · 50 flights
-
WN960
12% late · 50 flights
-
WN1124
17% late · 48 flights
-
WN1193
29% late · 47 flights
-
WN506
28% late · 47 flights
-
WN1364
34% late · 45 flights
-
WN4436
26% late · 43 flights
-
WN1663
19% late · 42 flights
-
WN3486
22% late · 41 flights
-
UA230
6% late · 37 flights
-
UA540
14% late · 36 flights
-
WN2249
3% late · 36 flights
-
WN4214
31% late · 36 flights
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