Route
IAD → SFO
Washington Dulles International Airport San Francisco International Airport
Alerts at IAD and SFO
How punctual is this route?
- On-time arrivals
- 77.5%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 78 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,688
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 42%
- Late-arriving aircraft 28%
- Airline (crew, maintenance, cleaning) 26%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 87.4% | 206 |
| October 2025 | 82.8% | 246 |
| November 2025 | 82.5% | 230 |
| December 2025 | 68.9% | 245 |
| January 2026 | 78.3% | 209 |
| February 2026 | 78.3% | 189 |
| March 2026 | 87.8% | 209 |
| April 2026 | 80.8% | 229 |
| May 2026 | 79.8% | 268 |
| June 2026 | 63.5% | 234 |
| July 2026 | 72.6% | 209 |
| August 2026 | 69.2% | 214 |
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 | 2,688 | 77.5% | 0.7% | 78 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA1757
41% late · 365 flights
-
UA2862
19% late · 362 flights
-
UA367
17% late · 343 flights
-
UA1434
23% late · 328 flights
-
UA1095
15% late · 319 flights
-
UA1147
16% late · 236 flights
-
UA796
16% late · 213 flights
-
UA1129
25% late · 138 flights
-
UA1702
12% late · 108 flights
-
UA635
18% late · 73 flights
-
UA2075
52% late · 71 flights
-
UA2032
14% late · 37 flights
-
UA2231
24% late · 21 flights
-
UA754
38% late · 21 flights
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