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WN 866 Denver to St. Louis Flight Status

Southwest Airlines Flight WN866 from Denver International Airport DEN to St. Louis Lambert International Airport STL is not scheduled for today June 4th, 2026.
The last time the flight was scheduled was on October 29th, 2025.
Check the table below for WN866's most recent flight history:

WN 866 Flight Status & Schedule

Date Departure Arrival Status
Oct 29 17:57 20:38
Delayed
Track >
Oct 28 17:45 20:18
Landed
Track >
Oct 22 17:51 20:22
Landed
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Oct 21 18:01 20:31
Landed Late
Track >
Oct 15 17:37 20:11
Landed
Track >

Southwest Airlines WN 866 Denver to St. Louis Flight Information

Southwest Airlines Flight WN866 connects Denver, United States to St. Louis, United States, taking off from Denver International Airport DEN and landing at St. Louis Lambert International Airport STL.

How long is the WN866 flight from Denver to St. Louis?

The average flight time from Denver to St. Louis is 1 hour and 33 minutes. The flight distance is 1235 km / 768 miles and the average flight speed is 795 km/h / 494 mph.

What is the On-Time Performance (OTP) of Southwest Airlines Flight WN866 Denver to St. Louis?

The Airportia On-Time Performance Rating for Southwest Airlines Flight WN866 is 4.8/5 stars. This metric is calculated using data from the past 10 flights.

Which terminal is the flight WN866 arriving at?

Flight WN866 arrives at St. Louis Lambert International Airport (STL) Terminal 2.

When was the latest WN866 flight?

The latest flight took off on Thursday, October 30th, 2025 with the flight status being En-Route on 20:38.

How else can the flight WN866 be referenced as?

This Southwest Airlines flight can also be referenced as SWA866, WN0866, WN 866, SWA 866.

How often is flight WN866 delayed?

On average, 75% of all WN866 flights are delayed. The average delay is 14 minutes.

Can I get compensation for my delayed or cancelled WN866 flight or baggage issues?

If your WN866 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 WN866 Flight Tracker above for more details.

WN866 and Denver DEN to St. Louis STL Flights

Other flights departing from Denver DEN: WN935, WN3599, WN910, WN972

Other flights arriving at St. Louis STL: WN1409, WN1646, WN1639, AA1363

All flights connecting Denver DEN to St. Louis STL.

WN866 Southwest Airlines Flight: Denver to St. Louis Route Map

WN866 Southwest Airlines Flight Map: Denver to St. Louis
Flight Delay Compensation up to 600€/$: Claim for delay, cancellation, or baggage issues >
Flight-schedule data supplied by Aviation Edge Real-time Flight Schedules API.