Airport month record

CMHAPR

John Glenn Columbus International in April 2026

Departures: 3,713
Month: April 2026
National, same month: 79.8%
Carriers: 11

Historical statistics for April 2026, not live status or a forecast for this year’s April. For today’s conditions at CMH, see live FAA status.

CMH in April earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 4 points better than the national rate of 79.8%. When something does go wrong the average delay runs a little over an hour. That rests on 3,713 flights, of which Republic Airways flew 1,104 at 86.7% on time.

Set against the rest of the country, CMH's April record is 4 points better than the US average of 79.8%. That gap is worth roughly 44 fewer late arrivals for every thousand flights.

On time

84.2%

Arrivals under 15 minutes late, of 3,688 completed departures

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

0.51%

Nationally in April: 0.90%

Whole year

80.1%

CMH across all twelve months

These figures cover 3,713 departures from John Glenn Columbus International in April 2026. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

April next to CMH's other months

Against CMH's own year, April ran 4 points better than the twelve-month rate of 80.1%, which makes it number two of twelve months, best first. Cancellations were unusually low for CMH in April, at 0.51% against 2.05% across the year. Either side of it, March ran 76.4% on time and May 83.4%, so a trip moved by a few weeks would have landed in a worse stretch.

CMH month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	3,933	73.3%	79 min	3.41%	C−
August 2025	3,758	82.1%	68 min	1.41%	B
September 2025	3,726	85.2%	67 min	0.51%	A+
October 2025	4,031	81.1%	67 min	0.72%	B+
November 2025	3,641	79.9%	77 min	1.81%	B
December 2025	3,567	70.7%	75 min	1.68%	C
January 2026	3,296	81.6%	78 min	6.28%	B−
February 2026	3,231	82.9%	75 min	2.72%	B
March 2026	4,010	76.4%	86 min	3.24%	B−
April 2026 (this page)	3,713	84.2%	72 min	0.51%	B+
May 2026	3,860	83.4%	65 min	1.22%	B
June 2026	3,876	81.0%	78 min	1.57%	B

Departure window

The best time of day to leave CMH in April

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 27 points, against 4 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,047 flights93.1%
8am–11am635 flights90.0%
11am–2pm658 flights88.1%
2pm–5pm481 flights74.8%
5pm–8pm686 flights73.4%
8pm–5am206 flights65.8%

Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 93.1% of the time, against 65.8% for the overnight window. That is 27 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 1,047 flights scheduled in it.

Across the week, Saturday is the strongest day at 91.0% on time and Thursday the weakest at 78.5%. 13 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at CMH in April

The two carriers here are closely matched: 4 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

Carriers at CMH in April 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
Republic Airways	1,104	86.7%	67 min	0.54%	A+
Southwest Airlines	1,050	83.1%	51 min	0.00%	B+
American Airlinesthin sample	361	81.0%	111 min	0.55%	B+
United Airlinesthin sample	293	79.9%	94 min	0.00%	B+
Delta Air Linesthin sample	276	94.1%	58 min	0.72%	A+
Envoy Airthin sample	258	82.5%	80 min	1.94%	B
PSA Airlinesthin sample	142	78.7%	103 min	0.70%	B+
SkyWest Airlinesthin sample	72	94.4%	22 min	0.00%	A+
Spirit Airlinesthin sample	67	76.9%	51 min	2.99%	B
Frontier Airlinesthin sample	60	73.3%	75 min	0.00%	C+
Alaska Airlinesthin sample	30	72.4%	43 min	3.33%	C−

No carrier stands out. Republic tops the table at 86.7%, 4 points clear of the bottom, which is inside the range this kind of sample moves year to year.

Route by route

Busiest routes out of CMH in April

Routes from CMH in April 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
CMH to ORD · Chicago	464	77.8%	99 min	2.80%	B
CMH to ATL · Atlantathin sample	249	92.3%	48 min	0.80%	A+
CMH to LGA · New Yorkthin sample	249	80.6%	81 min	0.00%	B+
CMH to MCO · Orlandothin sample	187	78.9%	57 min	1.07%	B
CMH to CLT · Charlottethin sample	180	85.6%	54 min	0.00%	A+
CMH to DCA · Washingtonthin sample	169	74.6%	83 min	0.00%	C+
CMH to BOS · Bostonthin sample	164	82.3%	49 min	0.00%	B+
CMH to DEN · Denverthin sample	149	89.9%	47 min	0.00%	A+
CMH to DFW · Dallas-Fort Worththin sample	146	79.2%	151 min	0.68%	B+
CMH to EWR · Newarkthin sample	146	95.2%	57 min	0.00%	A+
CMH to JFK · New Yorkthin sample	130	90.0%	77 min	0.00%	A+
CMH to PHX · Phoenixthin sample	110	80.0%	66 min	0.00%	B+
CMH to PHL · Philadelphiathin sample	103	91.3%	54 min	0.00%	A+
CMH to MIA · Miamithin sample	92	85.9%	63 min	0.00%	A+
CMH to MDW · Chicagothin sample	89	80.9%	79 min	0.00%	B+
CMH to DTW · Detroitthin sample	89	94.4%	30 min	0.00%	A+
CMH to BNA · Nashvillethin sample	88	83.0%	55 min	0.00%	B+
CMH to BWI · Baltimorethin sample	87	91.9%	50 min	0.00%	A+
CMH to LAS · Las Vegasthin sample	85	78.8%	64 min	0.00%	B+
CMH to IAD · Washingtonthin sample	85	95.3%	56 min	0.00%	A+
CMH to TPA · Tampathin sample	85	92.9%	26 min	0.00%	A+
CMH to FLL · Fort Lauderdalethin sample	75	88.0%	59 min	0.00%	A+
CMH to MSP · Minneapolisthin sample	59	98.3%	19 min	0.00%	A+
CMH to LAX · Los Angelesthin sample	57	77.2%	71 min	0.00%	B+
CMH to STL · St. Louisthin sample	56	83.9%	53 min	0.00%	B+

Delay causes

What held CMH up in April

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 42,000 reported delay minutes.

Late-arriving aircraft
38%
National Airspace System
34%
Carrier
23%
Extreme weather
5%
Security
0%

38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 42,000 reported delay minutes here, that single category outweighs weather by 8 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 41,867 reported delay minutes.

Cancellations are rare at 0.51%, below the national 0.90% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

5.7% of arrivals land an hour or more late, close to the national 6.4%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

What to do with this

Flying from CMH in April

For a April trip through CMH: this is one of the better months to be flying from here, 84.2% on time with 0.51% cancelled. That is a base rate for the month as a whole; a single storm can still spoil a particular day.

John Glenn Columbus International (CMH), the whole year
CMH in July73.3%
CMH in August82.1%
CMH in September85.2%
CMH in October81.1%
CMH in November79.9%
CMH in December70.7%
CMH in January81.6%
CMH in February82.9%
CMH in March76.4%
CMH in May83.4%
CMH in June81.0%

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures