Southwest Airlines

WN378Denver to Boston

Name: Southwest Airlines WN378 Denver to Boston: on-time record
Creator: TripStow
License: https://tripstow.com/notices

Southwest Airlines flight WN378 flies from Denver (DEN) to Boston (BOS), 2,816 km. Over August 2025 to July 2026 it usually arrives about 10 minutes late: 67% of 325 flights arrived within 15 minutes of schedule and 0.9% were cancelled (US Department of Transportation data).

On-time record, last 12 months

67%

on time (within 15 min)

21%

more than 30 min late

0.9%

cancelled

+10 min

average arrival vs schedule

Every operation of WN378, August 2025 to July 2026: 325 flights. Source: US Bureau of Transportation Statistics, public domain.

Routes flown as WN378

Denver (DEN) to Boston (BOS)57 flights
Denver (DEN) to New York (LGA)53 flights
Austin Bergstrom (AUS) to Phoenix Sky Harbor (PHX)50 flights
St. Louis (STL) to Atlanta (ATL)42 flights
Nashville (BNA) to Philadelphia (PHL)39 flights
Salt Lake City (SLC) to Las Vegas (LAS)25 flights
Washington (DCA) to Omaha (OMA)13 flights
Los Angeles (LAX) to Sacramento (SMF)9 flights
Fort Lauderdale Hollywood (FLL) to Chicago Midway (MDW)8 flights
Denver (DEN) to Houston (HOU)8 flights

Other flights from Denver to Boston

UA1027 UA1101 UA1219 UA1232 UA1307 UA1356 UA1418 UA1488 UA1587 UA1691 UA1824 UA2267

More about Denver (DEN) and Boston (BOS).

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