Southwest Airlines

WN1427Boston to Denver

Name: Southwest Airlines WN1427 Boston to Denver: on-time record
Creator: TripStow
License: https://tripstow.com/notices

Southwest Airlines flight WN1427 flies from Boston (BOS) to Denver (DEN), 2,816 km. Over August 2025 to July 2026 it usually arrives about 8 minutes late: 74% of 389 flights arrived within 15 minutes of schedule and 1% were cancelled (US Department of Transportation data).

On-time record, last 12 months

74%

on time (within 15 min)

15%

more than 30 min late

cancelled

+8 min

average arrival vs schedule

Every operation of WN1427, August 2025 to July 2026: 389 flights. Source: US Bureau of Transportation Statistics, public domain.

Routes flown as WN1427

Boston (BOS) to Denver (DEN)64 flights
New Orleans (MSY) to St. Louis (STL)57 flights
Nashville (BNA) to Long Beach (LGB)50 flights
Tucson (TUS) to Chicago Midway (MDW)47 flights
Washington (DCA) to Nashville (BNA)41 flights
El Paso (ELP) to Phoenix Sky Harbor (PHX)33 flights
Baltimore (BWI) to Buffalo Niagara (BUF)32 flights
Las Vegas (LAS) to Boise (BOI)21 flights
Denver (DEN) to Baltimore (BWI)11 flights
Pittsburgh (PIT) to St. Louis (STL)9 flights

Other flights from Boston to Denver

UA1333 UA1476 UA1787 UA2297 UA2340 UA2413 UA2433 UA2630 UA2702 UA337 UA414 UA497

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

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.

Dark badge, HTML

<a href="https://tripstow.com/flights/wn1427" title="WN1427 is on time 74% of the time on TripStow"><img src="https://tripstow.com/badge/flights/wn1427.svg" alt="WN1427 is on time 74% of the time" width="360" height="88" loading="lazy"></a>

Light badge, HTML

<a href="https://tripstow.com/flights/wn1427" title="WN1427 is on time 74% of the time on TripStow"><img src="https://tripstow.com/badge/flights/wn1427.svg?theme=light" alt="WN1427 is on time 74% of the time" width="360" height="88" loading="lazy"></a>

Markdown, for forums and README files

[![WN1427 is on time 74% of the time](https://tripstow.com/badge/flights/wn1427.svg)](https://tripstow.com/flights/wn1427)

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