Route
SFO → BWI
San Francisco International Airport Baltimore/Washington International Thurgood Marshall Airport
Alerts at SFO and BWI
How punctual is this route?
- On-time arrivals
- 81.0%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 54 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,034
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 75%
- Airline (crew, maintenance, cleaning) 16%
- Air traffic control & airport 8%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 74.4% | 87 |
| October 2025 | 88.6% | 105 |
| November 2025 | 85.0% | 80 |
| December 2025 | 78.2% | 87 |
| January 2026 | 90.1% | 86 |
| February 2026 | 85.7% | 78 |
| March 2026 | 92.2% | 90 |
| April 2026 | 84.9% | 86 |
| May 2026 | 78.2% | 87 |
| June 2026 | 66.3% | 83 |
| July 2026 | 73.2% | 83 |
| August 2026 | 73.2% | 82 |
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 |
|---|---|---|---|---|
| United Airlines | 669 | 90.8% | 0.4% | 56 min |
| Southwest Airlines | 365 | 63.0% | 0.8% | 52 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA2664
8% late · 346 flights
-
UA1340
12% late · 97 flights
-
WN4301
28% late · 64 flights
-
WN2683
61% late · 61 flights
-
WN3497
18% late · 58 flights
-
WN4209
48% late · 58 flights
-
UA2409
8% late · 40 flights
-
WN4427
16% late · 32 flights
-
UA2615
3% late · 31 flights
-
WN4271
39% late · 31 flights
-
WN4451
29% late · 31 flights
-
WN3547
54% late · 28 flights
-
UA453
4% late · 27 flights
-
UA1660
8% late · 26 flights
-
UA2861
4% late · 24 flights
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