1,053 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

United is clearly ahead here: 9 in 10 of its flights arrive on time, 25 points better than Southwest.

Best time to leave 8–9 am 96% arrive on time from SFO

Best single flight UA 2664 SFO 09:33 → BWI 17:57 · 91% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

SFO

% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

Baltimore flights leaving SFO 10–11 pm: 1Close ×


UA 1340	SFO 22:40	BWI 07:10	5h 30m	77	86%	1.3%	44 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.


United	688	90%	0.4%	52 min
Southwest	365	65%	0.8%	49 min

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.


UA 2664	SFO 09:33	BWI 17:57	91%

All 3 flights on this route →

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.


United	SFO	BWI	5h 19m	90%	0.4%	688	Flying now
Southwest	SFO	BWI	5h 10m	65%	0.8%	365	Flying now

Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON