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

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

Leave before 9 am: 92% depart on time. After 4 pm it’s almost half.

Best time to leave 8–9 am 79% arrive on time from MDW

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).

MDW

% 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 5 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 1876	MDW 10:20	SEA 12:50	4h 30m	16	88%	0.0%	104 min
WN 1340	MDW 10:40	SEA 13:10	4h 30m	26	50%	0.0%	65 min
WN 636	MDW 17:05	SEA 19:35	4h 30m	16	50%	0.0%	86 min
WN 2890	MDW 17:15	SEA 19:45	4h 30m	26	27%	0.0%	81 min
WN 4144	MDW 22:00	SEA 00:30	4h 30m	49	57%	4.1%	51 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	MDW	SEA	4h 30m	65%	0.6%	678	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