WN3378Chicago to Seattle
Southwest Airlines flight WN3378 flies from Chicago Midway (MDW) to Seattle Tacoma (SEA), 2,782 km. Over August 2025 to July 2026 it usually arrives about 13 minutes late: 71% of 181 flights arrived within 15 minutes of schedule and 0% were cancelled (US Department of Transportation data).
On-time record, last 12 months
Every operation of WN3378, August 2025 to July 2026: 181 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as WN3378
- Chicago Midway (MDW) to Seattle Tacoma (SEA)58 flights
- Pittsburgh (PIT) to Chicago Midway (MDW)41 flights
- Houston (HOU) to Denver (DEN)33 flights
- Chicago Midway (MDW) to Minneapolis (MSP)27 flights
- Orlando (MCO) to Kansas City (MCI)9 flights
- Orlando (MCO) to Dallas Love Field (DAL)8 flights
- Orlando (MCO) to Providence (PVD)3 flights
- Baltimore (BWI) to Fort Lauderdale Hollywood (FLL)1 flights
- San Antonio (SAT) to Nashville (BNA)1 flights
Other flights from Chicago to Seattle
More about Chicago Midway (MDW) and Seattle Tacoma (SEA).
Embed this on your site
A live badge for travel blogs, forums and trip reports. It updates as new data comes in, and links back here for the full stats.
<a href="https://tripstow.com/flights/wn3378" title="WN3378 is on time 71% of the time on TripStow"><img src="https://tripstow.com/badge/flights/wn3378.svg" alt="WN3378 is on time 71% of the time" width="360" height="88" loading="lazy"></a>
<a href="https://tripstow.com/flights/wn3378" title="WN3378 is on time 71% of the time on TripStow"><img src="https://tripstow.com/badge/flights/wn3378.svg?theme=light" alt="WN3378 is on time 71% of the time" width="360" height="88" loading="lazy"></a>[](https://tripstow.com/flights/wn3378)Flying soon?
Forward your booking to TripStow and get your trip built for you, with check-in reminders, punctuality for every flight and a map of everywhere you have been.
Start free