Historical on-time performance
Salt Lake City to Boston
Flights on SLC–BOS arrive on time 81% of the time over the last 12 months.
based on 1,181 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- Delta Air LinesOn-time82%Medianon timep9025 minCancel1.3%Flights1,083
- JetBlue AirwaysOn-time65%Medianon timep9080 minCancel6.1%Flights98
Why flights run late
Delay causes
- Airline33%
- Weather2%
- Air traffic (NAS)31%
- Late aircraft34%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline20%
- Weather75%
- Air traffic (NAS)5%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 20 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 SLC → BOS
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 76% to 83% on time.
- Mornings83% on time · p90 20 min · 708 flights
- Middays81% on time · p90 35 min · 494 flights
- Overnights78% on time · p90 45 min · 1,607 flights
- Evenings76% on time · p90 45 min · 1,067 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 84% on time.
- Wednesdays84% on time · p90 35 min · 523 flights
- Saturdays83% on time · p90 25 min · 597 flights
- Tuesdays83% on time · p90 30 min · 513 flights
- Mondays77% on time · p90 45 min · 545 flights
- Sundays76% on time · p90 55 min · 572 flights
- Fridays75% on time · p90 45 min · 567 flights
- Thursdays75% on time · p90 40 min · 559 flights
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