Airport month record

INDAPR

Indianapolis International in April 2026

Departures: 4,290
Month: April 2026
National, same month: 79.8%
Carriers: 12

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

IND in April lands a B, 3 points better than the national rate of 79.8%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 4,290 flights, of which Republic Airways flew 1,137 at 85.2% on time.

Republic Airways is the most reliable of the three carriers covered here at 85.2% on time across 1,137 flights.

On time

83.0%

Arrivals under 15 minutes late, of 4,232 completed departures

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

1.19%

Nationally in April: 0.90%

Whole year

80.2%

IND across all twelve months

These figures cover 4,290 departures from Indianapolis 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 IND's other months

Against IND's own year, April ran 3 points better than the twelve-month rate of 80.2%, which makes it number five of twelve months, best first. Either side of it, March ran 76.7% on time and May 82.5%, so a trip moved by a few weeks would have landed in a worse stretch.

IND month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	4,222	74.9%	85 min	3.01%	C−
August 2025	3,876	81.4%	78 min	1.11%	B
September 2025	3,742	85.1%	68 min	0.56%	A+
October 2025	4,354	83.2%	70 min	0.57%	B+
November 2025	3,904	83.1%	77 min	2.84%	B
December 2025	3,906	69.5%	75 min	1.59%	C
January 2026	3,690	79.7%	78 min	4.44%	B−
February 2026	3,457	83.3%	61 min	2.57%	B
March 2026	4,362	76.7%	87 min	2.57%	B
April 2026 (this page)	4,290	83.0%	65 min	1.19%	B
May 2026	4,324	82.5%	62 min	0.88%	B+
June 2026	4,249	79.9%	76 min	1.88%	B

Departure window

The best time of day to leave IND in April

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 24 points, against 4 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,109 flights92.0%
8am–11am641 flights88.6%
11am–2pm701 flights86.8%
2pm–5pm716 flights79.8%
5pm–8pm856 flights71.4%
8pm–5am267 flights67.8%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 92.0% of the time, against 67.8% for the overnight window. That is 24 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 1,109 flights scheduled in it.

Across the week, Saturday is the strongest day at 88.7% on time and Friday the weakest at 76.2%. 13 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at IND in April

The three 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 IND in April 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	1,177	82.6%	48 min	0.00%	B+
Republic Airways	1,137	85.2%	60 min	0.18%	A+
American Airlines	673	81.6%	103 min	3.12%	B−
Delta Air Linesthin sample	360	90.7%	47 min	1.11%	A
SkyWest Airlinesthin sample	282	79.3%	64 min	3.90%	B−
United Airlinesthin sample	217	78.9%	51 min	1.38%	B
Frontier Airlinesthin sample	102	76.0%	69 min	1.96%	B
Allegiant Airthin sample	100	69.4%	66 min	0.00%	C+
Spirit Airlinesthin sample	87	86.6%	95 min	5.75%	A−
Envoy Airthin sample	73	76.1%	89 min	2.74%	B
Alaska Airlinesthin sample	51	90.0%	26 min	1.96%	A
PSA Airlinesthin sample	31	83.9%	98 min	0.00%	B+

American Airlines cancels 3.1% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

Route by route

Busiest routes out of IND in April

Routes from IND in April 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
IND to ORD · Chicago	587	75.9%	74 min	5.45%	B−
IND to ATL · Atlantathin sample	256	92.4%	49 min	1.56%	A
IND to LGA · New Yorkthin sample	218	83.9%	54 min	0.00%	B+
IND to MCO · Orlandothin sample	217	82.3%	53 min	0.92%	B+
IND to DEN · Denverthin sample	195	80.0%	55 min	0.00%	B+
IND to EWR · Newarkthin sample	176	86.9%	48 min	0.57%	A+
IND to BOS · Bostonthin sample	168	87.5%	44 min	0.00%	A+
IND to DCA · Washingtonthin sample	167	78.4%	54 min	0.00%	B+
IND to CLT · Charlottethin sample	163	84.0%	205 min	0.00%	B+
IND to DFW · Dallas-Fort Worththin sample	161	83.4%	54 min	2.48%	B
IND to PHL · Philadelphiathin sample	144	87.4%	75 min	0.69%	A+
IND to PHX · Phoenixthin sample	142	84.5%	45 min	0.00%	B+
IND to LAS · Las Vegasthin sample	121	75.2%	38 min	0.00%	B+
IND to DTW · Detroitthin sample	115	82.3%	58 min	1.74%	B
IND to AUS · Austinthin sample	112	86.6%	60 min	0.00%	A+
IND to BWI · Baltimorethin sample	106	89.6%	55 min	0.00%	A+
IND to MSP · Minneapolisthin sample	104	89.4%	64 min	0.00%	A+
IND to TPA · Tampathin sample	92	80.4%	60 min	0.00%	B+
IND to FLL · Fort Lauderdalethin sample	90	81.2%	88 min	4.44%	B−
IND to IAD · Washingtonthin sample	83	95.2%	38 min	0.00%	A+
IND to MIA · Miamithin sample	82	90.2%	222 min	0.00%	A+
IND to RSW · Fort Myersthin sample	79	87.3%	45 min	0.00%	A+
IND to LAX · Los Angelesthin sample	77	81.8%	32 min	0.00%	B+
IND to BNA · Nashvillethin sample	69	81.2%	57 min	0.00%	B+
IND to MDW · Chicagothin sample	64	66.7%	55 min	0.00%	C+

Delay causes

What held IND 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 47,000 reported delay minutes.

Late-arriving aircraft
40%
Carrier
30%
National Airspace System
27%
Extreme weather
4%
Security
0%

40% 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 47,000 reported delay minutes here, that single category outweighs weather by 11 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 46,512 reported delay minutes.

Cancellations sit at 1.19% against a national 0.90%, which is ordinary. Diversions add another 0.16%.

5.2% 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 about an hour, which a normal layover absorbs.

What to do with this

Flying from IND in April

For a April trip through IND: expect 83.0% on time and 1.19% cancelled, going by April 2026. The 5am–8am window was the strongest part of the day.

Indianapolis International (IND), the whole year
IND in July74.9%
IND in August81.4%
IND in September85.1%
IND in October83.2%
IND in November83.1%
IND in December69.5%
IND in January79.7%
IND in February83.3%
IND in March76.7%
IND in May82.5%
IND in June79.9%

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