BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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BOS→DEN

Southwest Airlines Boston, MA (BOS) to Denver, CO (DEN) reliability

Among 910 scheduled Southwest Airlines flights from BOS to DEN, 64.0% arrived on time, 20.5% arrived at least 30 minutes late, and 0.9% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Marketing carrier: Southwest Airlines (WN) · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
64.0%arrived on time
20.5%30+ min late
0.9%cancelled
910scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late20.5%
60+ minutes late10.1%
Cancelled0.9%
Average arrival+14.6 mincompleted flights

What did Southwest Airlines BOS to DEN record?

Southwest Airlines completed 98.7% of its scheduled reportable BOS to DEN flights in the observation window. 64.0% of all scheduled flights arrived less than 15 minutes late, while 10.1% arrived at least an hour late.

What were Southwest Airlines BOS to DEN disruption rates?

For Southwest Airlines BOS-to-DEN flights, 20.5% arrived at least 30 minutes late, 0.9% were cancelled, and 0.4% were diverted.

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What was the Southwest Airlines BOS to DEN scheduled cohort?

The Southwest Airlines BOS-to-DEN cohort contained 910 scheduled flights; 898 completed, 8 were cancelled, and 4 were diverted.

Not a prediction.

This is a descriptive historical rate. Schedule changes, seasonal operations and current conditions may differ.