Historical on-time performance
Salt Lake City to Billings
387 miData through Dec 2025Source: US DOT · BTS
Flights on SLC–BIL arrive on time 90% of the time over the last 12 months.
On-time rate90%arrived within 15 min
p90 delay10 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights
based on 1,047 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time94%Medianon timep905 minCancel0.6%Flights709
- Delta Air LinesOn-time83%Medianon timep9030 minCancel0.3%Flights338
Why flights run late
Delay causes
- Airline69%
- Weather12%
- Air traffic (NAS)4%
- Late aircraft15%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SLC → BIL
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 84% to 95% on time.
- Middays95% on time · p90 on time · 177 flights · limited
- Mornings94% on time · p90 5 min · 919 flights
- Afternoons89% on time · p90 15 min · 953 flights
- Overnights84% on time · p90 25 min · 1,088 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 86% to 92% on time.
- Saturdays92% on time · p90 10 min · 382 flights
- Tuesdays92% on time · p90 10 min · 460 flights
- Thursdays89% on time · p90 10 min · 458 flights
- Fridays88% on time · p90 15 min · 460 flights
- Wednesdays88% on time · p90 15 min · 461 flights
- Sundays87% on time · p90 15 min · 452 flights
- Mondays86% on time · p90 25 min · 464 flights
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