Historical on-time performance
Williston to Denver
582 miData through May 2026Source: US DOT · BTS
Flights on XWA–DEN arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights
based on 1,453 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time73%Medianon timep9080 minCancel1.5%Flights1,453
Why flights run late
Delay causes
- Airline43%
- Weather9%
- Air traffic (NAS)25%
- Late aircraft22%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather82%
- Air traffic (NAS)18%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 22 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly XWA → DEN
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 62% to 83% on time.
- Mornings83% on time · p90 35 min · 1,210 flights
- Middays80% on time · p90 50 min · 985 flights
- Afternoons72% on time · p90 60 min · 1,049 flights
- Evenings62% on time · p90 105 min · 643 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 77% on time.
- Saturdays77% on time · p90 50 min · 449 flights
- Wednesdays77% on time · p90 55 min · 563 flights
- Sundays76% on time · p90 70 min · 577 flights
- Tuesdays76% on time · p90 65 min · 560 flights
- Thursdays75% on time · p90 75 min · 574 flights
- Mondays75% on time · p90 60 min · 581 flights
- Fridays73% on time · p90 65 min · 583 flights
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