Route on-time record
BWI to SFO: most on-time flights and the best time to fly
Baltimore (Baltimore/Washington International Thurgood Marshall Airport) to San Francisco (San Francisco International Airport). 1,113 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was United 2192 at 6:05 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BWI → SFO
Baltimore to San Francisco: 1,113 nonstop flights a year
On time (12 months)
74%
Cancelled
0.9%
avg delay 16 min
Best time to leave
Before 9 AM
87% on time vs 61% 3 to 6 PM
Most reliable airline
United
78% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · United 2192
6:05 AM → 9:16 AM6h 11m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 97% of the time (63 flights, Jun 2025 to May 2026).
- Never cancelled in 64 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; 3 to 6 PM: 61%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Moderate track record · 63 flights
Find United 2192 fares Opens this date on Aviasales#2 · United 504
6:15 PM → 9:26 PM6h 11m nonstop
Local times, typical schedule. Last flown 2026-05-31.
68%
chance on time
- On time (history)
- 65%
- Cancelled
- 1.6%
- Avg arrival delay
- 21 min
- Arrived on time 65% of the time (121 flights, Jun 2025 to May 2026).
- Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 121 flights
Find United 504 fares Opens this date on Aviasales#3 · Southwest 3693
8:15 PM → 11:20 PM6h 05m nonstop
Local times, typical schedule. Last flown 2026-05-31.
46%
chance on time
- On time (history)
- 37%
- Cancelled
- 0.0%
- Avg arrival delay
- 34 min
- Arrived on time 37% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Limited track record · 54 flights
Find Southwest 3693 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines78%
752 flights · 80% on time as flown · 0.9% cancel
- Southwest Airlines63%
361 flights · 62% on time as flown · 0.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM87%
407 flights · avg delay 7 min
- 9 AM to noon83%
153 flights · avg delay 10 min
- Noon to 3 PM66%
58 flights · avg delay 25 min
- 3 to 6 PM61%
90 flights · avg delay 22 min
- 6 to 9 PM61%
405 flights · avg delay 24 min
Best day: Saturday (84%). Worst: Friday (77%).
Smarter routing
Nearby airports that run more on time
IAD → SFO 78% chance on time
Washington Dulles International Airport to San Francisco International Airport · 2,828 flights a year · 45 mi from your airports · yours: 73%
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft34%
- Air traffic control and airport volume33%
- Airline (crew, maintenance, boarding)25%
- Severe weather8%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
BWI to SFO questions
- What time of day is best to fly BWI to SFO?
- Before 9 AM: 87% of flights arrived on time, against 61% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from BWI to SFO?
- United, with a season-adjusted 78% chance of operating and arriving on time over 752 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on BWI to SFO?
- May (71% on time); the best was October (89%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from BWI
- SFO to BWI (return)
- BWI to ATL 79%
- BWI to MCO 75%
- BWI to BOS 74%
- BWI to FLL 75%
- BWI to CLT 80%
- BWI to DEN 76%
- BWI to TPA 79%
- BWI to ORD 75%
- BWI to MIA 74%
- BWI to DTW 81%
- BWI to PVD 78%
- BWI to BNA 80%
Most on-time flights from BWI on every route →
Live status: FAA delays and ground stops