Route profile
CMH→BOS
Flight reliability, delays and best times to fly from Columbus to Boston, 640 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 73% of comparable major US routes (4,598 compared)
Calculated from 5,777 flights. How this is calculated
CMH → BOS arrives on time 84.3% of the time; the return trip, BOS → CMH, arrives on time 83.3% of the time.
CMH → BOS spends 25.7 minutes on the ground on a 640-mile trip: 15.5 minutes from pushback to wheels-up at CMH and 10.2 minutes from touchdown to gate at BOS.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What sets this route apart
Where CMH to BOS differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
CMH to BOS is at its best against routes of similar length for flights scheduled at 8 PM: 82.8% arrive on time, 15.4 points ahead of the 67.4% those routes manage at that hour. Against all other routes the gap is 15.4 points.
CMH to BOS struggles most at 3 PM: 62.6% of its flights scheduled then arrive on time, 11 points behind the 73.6% on routes of similar length at the same hour. Against all other routes the gap is 10.1 points.
CMH to BOS holds up on Sundays better than routes of similar length do: 83.9% on time to their 74.6%, a 9.3 points lead. Against all other routes the gap is 9.1 points.
June is kinder to CMH to BOS than to routes of similar length: 85.0% on time against 72.3%, 12.7 points better. Against all other routes the gap is 12.3 points.
Envoy Air’s flights on CMH to BOS arrive on time 71.1% of the time, 7.3 points below the 78.4% it manages on its routes of similar length. Against all other routes the gap is 8.1 points.
CMH to BOS against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 8 PM departures | 82.8% | routes of similar length | 67.4% | +15.4 pts | 198 here, 100,446 there |
| Hour: 3 PM departures | 62.6% | routes of similar length | 73.6% | −11.0 pts | 187 here, 126,380 there |
| Weekday: Sunday | 83.9% | routes of similar length | 74.6% | +9.3 pts | 822 here, 316,439 there |
| Month: June | 85.0% | routes of similar length | 72.3% | +12.7 pts | 500 here, 178,331 there |
| Airline: Envoy Air | 71.1% | routes of similar length | 78.4% | −7.3 pts | 759 here, 37,920 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 640 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why CMH → BOS flights are cancelled
July 2023 – July 2026
CMH → BOS cancelled 79 of 5,777 scheduled flights — about 1 in every 73. The reason filed most often was the air traffic system, 38.0% of the cancellations coded on this route — about 1 in every 193 scheduled flights.
Share of cancellations
Of 79 cancelled departures carrying a reason code.
What each reason means
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
30 cancellations, 38.0% of the total.
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
28 cancellations, 35.4% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
21 cancellations, 26.6% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. With only one or two carriers on the route, the split mostly reflects how they file. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
79 coded cancellations were recorded on CMH → BOS; the section appears from 50.
When it goes wrong
July 2023 – July 2026
38 min late
against a median of 11 min early
Percentiles over 5,777 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at BOS after arriving from CMH.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 27% | High risk |
| 45 min | 15% | High risk |
| 60 min | 11% | Some risk |
| 90 min | 6.6% | Some risk |
| 120 min | 3.6% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.37% of the time and diverts 0.21% of the time, which a late arrival never shows up in.
Chance of missing is the share of 5,686 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 38 minutes late (90th-percentile gate arrival delay), over 5,777 operations.
Any other layover length: connection checker.
Best time to fly
CMH → BOS flights departing 5–9 AM arrived on time 92.1% of the time, against 71.5% for 3–6 PM departures, a gap of 20.6 percentage points.
By departure window
By departure hour
- 12 AM to 5 AM: too few flights to score
- 6 AM: 91.6% on time from 697 flights
- 7 AM: 91.9% on time from 874 flights
- 8 AM: 93.6% on time from 225 flights
- 9 AM: 96.7% on time from 218 flights
- 10 AM: 90.6% on time from 567 flights
- 11 AM: 88.8% on time from 675 flights
- 12 PM: 84.8% on time from 413 flights
- 1 PM: 78.3% on time from 220 flights
- 2 PM: 69.7% on time from 247 flights
- 3 PM: 62.6% on time from 189 flights
- 4 PM: 73.5% on time from 219 flights
- 5 PM: 73.3% on time from 743 flights
- 6 PM: 70.9% on time from 192 flights
- 7 PM: too few flights to score
- 8 PM: 82.8% on time from 203 flights
- 9 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why CMH → BOS runs late
July 2023 – July 2026
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for CMH → BOS. Only delays of 15 minutes or more are attributed.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Republic Airways | 4,876 | 86.8% | 1.37% | -12 min | 5.3% |
| Envoy Air | 769 | 71.1% | 1.17% | -1 min | 14.0% |
Republic Airways flew 86.4% of the 5,645 flights listed.
Republic Airways arrived on time 15.7 percentage points more often than Envoy Air on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Monday the least, a gap of 6.5 percentage points.
By month
- Jan: 83.8%
- Feb: 84.2%
- Mar: 86.8%
- Apr: 87.7%
- May: 81.6%
- Jun: 85.0%
- Jul: 81.5%
- Aug: 86.0%
- Sep: 76.7%
- Oct: 85.0%
- Nov: 89.4%
- Dec: 86.2%
September is historically the weakest month and November the strongest, a spread of 12.7 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 79.7% from 133 flights
- August 2023: 84.1% from 139 flights
- September 2023: 77.3% from 154 flights
- October 2023: 88.3% from 164 flights
- November 2023: 91.3% from 127 flights
- December 2023: too few flights to score (104)
- January 2024: too few flights to score (110)
- February 2024: too few flights to score (106)
- March 2024: too few flights to score (114)
- April 2024: 87.4% from 127 flights
- May 2024: 76.3% from 141 flights
- June 2024: 87.2% from 164 flights
- July 2024: 79.0% from 171 flights
- August 2024: 85.2% from 174 flights
- September 2024: 86.1% from 187 flights
- October 2024: 91.7% from 180 flights
- November 2024: 92.2% from 167 flights
- December 2024: 89.2% from 161 flights
- January 2025: 82.1% from 163 flights
- February 2025: 80.8% from 146 flights
- March 2025: 90.6% from 161 flights
- April 2025: 93.3% from 164 flights
- May 2025: 80.3% from 173 flights
- June 2025: 77.2% from 170 flights
- July 2025: 82.4% from 172 flights
- August 2025: 88.4% from 175 flights
- September 2025: 66.1% from 180 flights
- October 2025: 75.0% from 179 flights
- November 2025: 84.6% from 151 flights
- December 2025: 82.2% from 148 flights
- January 2026: 84.2% from 165 flights
- February 2026: 87.2% from 153 flights
- March 2026: 83.3% from 178 flights
- April 2026: 82.3% from 164 flights
- May 2026: 87.4% from 168 flights
- June 2026: 90.5% from 169 flights
- July 2026: 84.2% from 175 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 82.8% against 86.0% in the 12 months before — declining by 3.2 percentage points.
Data and methodology
Calculated by FlyerIntel from 5,777 CMH → BOS flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed