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WN3855 Flight Status Southwest Airlines: St. Louis to Boston (SWA3855)

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WN 3855 St. Louis to Boston Flight Status

Southwest Airlines Flight WN3855 from St. Louis Lambert International Airport STL to Boston Logan International Airport BOS is not scheduled for today June 4th, 2026.
The last time the flight was scheduled was on June 4th, 2025.
Check the table below for WN3855's most recent flight history:

WN 3855 Flight Status & Schedule

Date Departure Arrival Status
Jun 04 19:09 22:20
Landed
 Track >
Jun 03 19:58 23:12
Landed Late
 Track >
Jun 02 19:56 23:08
Landed
 Track >
Jun 01 20:47 00:00
Landed
 Track >
< All STL Departures All BOS Arrivals >

Southwest Airlines WN 3855 St. Louis to Boston Flight Information

Southwest Airlines Flight WN3855 connects St. Louis, United States to Boston, United States, taking off from St. Louis Lambert International Airport STL and landing at Boston Logan International Airport BOS.

How long is the WN3855 flight from St. Louis to Boston?

The average flight time from St. Louis to Boston is 2 hours and 12 minutes. The flight distance is 1680 km / 1044 miles and the average flight speed is 761 km/h / 473 mph.

What is the On-Time Performance (OTP) of Southwest Airlines Flight WN3855 St. Louis to Boston?

The Airportia On-Time Performance Rating for Southwest Airlines Flight WN3855 is 4.8/5 stars. This metric is calculated using data from the past 10 flights.

Which terminal is the flight WN3855 arriving at?

Flight WN3855 arrives at Boston Logan International Airport (BOS) Terminal B.

When was the latest WN3855 flight?

The latest flight took off on Thursday, June 5th, 2025 with the flight status being Landed on 22:20.

How else can the flight WN3855 be referenced as?

This Southwest Airlines flight can also be referenced as SWA3855, WN 3855, SWA 3855.

How often is flight WN3855 delayed?

On average, 25% of all WN3855 flights are delayed. The average delay is 42 minutes.

Can I get compensation for my delayed or cancelled WN3855 flight or baggage issues?

If your WN3855 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.

See our WN3855 Flight Tracker above for more details.

WN3855 and St. Louis STL to Boston BOS Flights

Other flights departing from St. Louis STL: WN2975, WN635, AA4982, WN3596

Other flights arriving at Boston BOS: WN164, DL5840, DL1327, WN4075

All flights connecting St. Louis STL to Boston BOS.

WN3855 Southwest Airlines Flight: St. Louis to Boston Route Map

WN3855 Southwest Airlines Flight Map: St. Louis to Boston
Flight Delay Compensation up to 600€/$: Claim for delay, cancellation, or baggage issues >
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