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Route on-time record

CHS to BOS: most on-time flights and the best time to fly

Charleston (Charleston International Airport) to Boston (Boston Logan International Airport). 1,121 nonstop flights in Jun 2025 to May 2026, 71% arrived within 15 minutes and 2.0% were cancelled. The most reliable flight number was Republic 5670 at 12:17 PM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

CHS → BOS

Charleston to Boston: 1,121 nonstop flights a year

On time (12 months)

71%

Cancelled

2.0%

avg delay 24 min

Best time to leave

Before 9 AM

90% on time vs 61% 6 to 9 PM

Most reliable airline

Republic

75% chance on time

Check CHS to BOS fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

  1. #1 · Republic 5670 · sold as American Eagle, Delta Connection or United Express

    12:17 PM → 2:35 PM2h 18m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    79%

    chance on time

    On time (history)
    94%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 94% of the time (17 flights, Jun 2025 to May 2026).
    • Lands inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
    • Short track record (17 flights), so its score leans on the airline's record at this hour.

    Limited track record · 17 flights

    Find 12:17 PM flight fares Opens this date on Aviasales

  2. #2 · JetBlue 68

    10:32 AM → 12:47 PM2h 15m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    70%

    chance on time

    On time (history)
    71%
    Cancelled
    2.2%
    Avg arrival delay
    23 min
    • Arrived on time 71% of the time (356 flights, Jun 2025 to May 2026).
    • Lands inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.

    Strong track record · 356 flights

    Find JetBlue 68 fares Opens this date on Aviasales

  3. #3 · JetBlue 2468

    6:00 AM → 8:12 AM2h 14m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    68%

    chance on time

    On time (history)
    68%
    Cancelled
    1.8%
    Avg arrival delay
    25 min
    • Arrived on time 68% of the time (160 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 61%).
    • 75% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 160 flights

    Find JetBlue 2468 fares Opens this date on Aviasales

  4. #4 · Delta 2785

    4:22 PM → 6:49 PM2h 27m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    66%

    chance on time

    On time (history)
    67%
    Cancelled
    3.1%
    Avg arrival delay
    26 min
    • Arrived on time 67% of the time (285 flights, Jun 2025 to May 2026).
    • Cancelled 3.1% of the time (9 of 294).

    Strong track record · 285 flights

    Find Delta 2785 fares Opens this date on Aviasales

  5. #5 · JetBlue 1136

    4:57 PM → 7:23 PM2h 26m nonstop

    Local times, typical schedule. Last flown 2026-04-13.

    64%

    chance on time

    On time (history)
    60%
    Cancelled
    0.0%
    Avg arrival delay
    24 min
    • Arrived on time 60% of the time (10 flights, Jun 2025 to May 2026).
    • 51% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (10 flights), so its score leans on the airline's record at this hour.

    Limited track record · 10 flights

    Find JetBlue 1136 fares Opens this date on Aviasales

  6. #6 · JetBlue 2368

    4:32 PM → 6:56 PM2h 24m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    63%

    chance on time

    On time (history)
    65%
    Cancelled
    0.0%
    Avg arrival delay
    22 min
    • Arrived on time 65% of the time (37 flights, Jun 2025 to May 2026).
    • Never cancelled in 37 scheduled flights.
    • Short track record (37 flights), so its score leans on the airline's record at this hour.

    Limited track record · 37 flights

    Find JetBlue 2368 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Republic Airways (sold as American Eagle, Delta Connection or United Express)75%

    83 flights · 83% on time as flown · 1.7% cancel

  • JetBlue69%

    642 flights · 71% on time as flown · 1.8% cancel

  • Delta Air Lines68%

    396 flights · 68% on time as flown · 2.4% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM90%

    105 flights · avg delay 7 min

  • 9 AM to noon86%

    179 flights · avg delay 12 min

  • Noon to 3 PM62%

    285 flights · avg delay 29 min

  • 3 to 6 PM68%

    392 flights · avg delay 26 min

  • 6 to 9 PM61%

    158 flights · avg delay 33 min

Best day: Saturday (78%). Worst: Sunday (66%).

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
82
F
79
M
79
A
77
M
71
J
69
J
62
A
68
S
63
O
70
N
79
D
73

What delays this route

  • Late-arriving aircraft40%
  • Air traffic control and airport volume34%
  • Airline (crew, maintenance, boarding)24%
  • Severe weather2%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

CHS to BOS questions

What time of day is best to fly CHS to BOS?
Before 9 AM: 90% of flights arrived on time, against 61% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from CHS to BOS?
Republic, with a season-adjusted 75% chance of operating and arriving on time over 83 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on CHS to BOS?
July (62% on time); the best was January (82%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from CHS

Live status: FAA delays and ground stops