Historical on-time performance
Pittsburgh to Boston
496 miData through May 2026Source: US DOT · BTS
Flights on PIT–BOS arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled2.3%of scheduled flights
based on 2,140 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysbestOn-time80%Medianon timep9040 minCancel2.3%Flights1,133
- JetBlue AirwaysOn-time74%Medianon timep9060 minCancel2.4%Flights1,007
Why flights run late
Delay causes
- Airline20%
- Weather5%
- Air traffic (NAS)40%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline24%
- Weather28%
- Air traffic (NAS)48%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 50 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 PIT → BOS
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 89% on time.
- Mornings89% on time · p90 10 min · 2,113 flights
- Middays83% on time · p90 30 min · 1,784 flights
- Afternoons71% on time · p90 70 min · 683 flights
- Evenings65% on time · p90 80 min · 1,499 flights
- Overnights63% on time · p90 65 min · 215 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 84% on time.
- Saturdays84% on time · p90 35 min · 705 flights
- Wednesdays83% on time · p90 25 min · 900 flights
- Tuesdays81% on time · p90 35 min · 881 flights
- Mondays78% on time · p90 55 min · 970 flights
- Sundays77% on time · p90 55 min · 913 flights
- Fridays76% on time · p90 55 min · 971 flights
- Thursdays75% on time · p90 55 min · 954 flights
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