Southwest AirlinesWN100% on time
Flights WN662 05:15 Mo Th Fr · WN1396 05:20 Tu We · WN409 05:30 Sa · WN4865 varies Su
live
Direct flights from Seattle (SEA) to Chicago (MDW): 7 nonstop departures observed each week across 1 airline. 100% of the last 7 operated flights arrived within 15 minutes of schedule. The median arrival is 12 minutes early. No cancellations were recorded across the 7 tracked flights. The nonstop covers 2,782 km, an estimated 4 hours 4 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Chicago. Updated 13 September 2026 at 20:23 UTC.
SEA
Seattle
heavy · +35
MDW
Chicago
smooth · +5
2,782 km · ~4h 04m est.
Runs reliable · 1 airline · 7x weekly · nonstop
100% on time
of the last 7 operated SEA → MDW flights arrived within 15 minutes
Median arrival delay is −12 min. 0 of 7 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−12 minacross the last 7 operated legs
Flight time~4h 04mestimated from route distance
Weekly departures7x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at MDW: 32% odds of a 15+ minute delay and around +11 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Seattle to Chicago route actually runs
Pro Flight Search records official board updates for nonstop SEA to MDW flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Seattle (SEA) to Chicago (MDW) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SEA-MDW
SEA to MDW questions
Is SEA–MDW running on time right now?
Mostly on schedule. The departure side at SEA is the weaker end, route health score 72/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on SEA–MDW?
Operators schedule morning departures around 05:15 and evening departures around 23:05 from SEA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the MDW delay card to confirm conditions when you'd arrive.
How long is the flight from SEA to MDW?
Great-circle distance is 2,782 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 226–268 min gate-to-gate on this route.
How often does SEA–MDW fly?
Southwest Airlines runs the route with about 22 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
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