Showing Southwest only (incl. its regional partners)All airlines ×

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

Take the nonstop: Southwest BWI → DTW (1h 35m) reaches Detroit on time 3 times in 4; the most reliable connection, Southwest via Midway (4h 34m), 38%.

Best time to leave 11 am–12 pm 89% arrive on time from BWI

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).

BWI

% 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

Pick an hour to see this route’s flights leaving then.

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.

No Southwest flight on this route ran 150+ times in the year.

All 3 Southwest flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.


WN 4177	BWI 11:00	DTW 12:35	1h 35m	16	80%	6.2%	49 min
WN 4159	BWI 18:00	DTW 19:35	1h 35m	33	58%	6.1%	86 min
WN 942	BWI 22:40	DTW 00:20	1h 35m	49	68%	4.1%	86 min

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.


Southwest	BWI	DTW	1h 35m	77%	2.1%	777	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