Historical on-time performance
Boston to Charleston
818 miData through May 2026Source: US DOT · BTS
Flights on BOS–CHS arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 977 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time79%Medianon timep9035 minCancel1.5%Flights328
- JetBlue AirwaysOn-time73%Medianon timep9060 minCancel1.3%Flights614
- Republic AirwaysOn-time71%Medianon timep9065 minCancel0.0%Flights35
Why flights run late
Delay causes
- Airline36%
- Weather2%
- Air traffic (NAS)24%
- Late aircraft37%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline38%
- Weather38%
- Air traffic (NAS)23%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 13 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 BOS → CHS
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 — 81% on time.
- Mornings81% on time · p90 30 min · 1,105 flights
- Middays76% on time · p90 45 min · 1,547 flights
- Afternoons65% on time · p90 75 min · 482 flights
- Evenings61% on time · p90 90 min · 409 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 80% on time.
- Tuesdays80% on time · p90 45 min · 446 flights
- Wednesdays79% on time · p90 40 min · 459 flights
- Saturdays78% on time · p90 50 min · 593 flights
- Mondays73% on time · p90 40 min · 495 flights
- Sundays71% on time · p90 50 min · 575 flights
- Thursdays70% on time · p90 55 min · 495 flights
- Fridays70% on time · p90 70 min · 501 flights
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