Historical on-time performance
Salt Lake City to Boston
2,105 miData through Dec 2025Source: US DOT · BTS
Flights on SLC–BOS arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 1,152 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Delta Air LinesOn-time82%Medianon timep9030 minCancel0.3%Flights1,063
- JetBlue AirwaysOn-time75%Medianon timep9050 minCancel2.2%Flights89
Why flights run late
Delay causes
- Airline31%
- Weather2%
- Air traffic (NAS)33%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Late aircraft.
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 (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 75% to 82% on time.
- Mornings82% on time · p90 25 min · 666 flights
- Middays81% on time · p90 35 min · 496 flights
- Overnights76% on time · p90 50 min · 1,610 flights
- Evenings75% on time · p90 45 min · 1,094 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 81% on time.
- Wednesdays81% on time · p90 40 min · 536 flights
- Tuesdays81% on time · p90 35 min · 526 flights
- Saturdays80% on time · p90 30 min · 577 flights
- Mondays77% on time · p90 40 min · 545 flights
- Thursdays75% on time · p90 45 min · 553 flights
- Sundays74% on time · p90 55 min · 569 flights
- Fridays74% on time · p90 50 min · 560 flights
Advertisement
Keep exploring