Indianapolis International in May 2026

80.8%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In May 2026, reporting carriers scheduled 4,324 domestic departures from Indianapolis International (IND). 80.8% left less than 15 minutes late and 81.7% reached their destination on time; 0.9% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so IND departures were 3.7 points above the national departure figure.

A year earlier, in May 2025, the airport had 4,177 departures with 79.5% leaving on time: a change of +1.3 points, with flights up 4%.

Flights arriving at IND that month were on time 77.6% of the time (4,323 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 30% and national aviation system 24%.

On time 81.7%
Arrived 15+ minutes late 17.3%
Cancelled 0.9%
Diverted 0.2%

Every scheduled departure from IND in May 2026, judged by arrival at the destination.

May 2026 against a year earlier, the airport's year and the nation

Measure	May 2026	May 2025	IND, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	80.8%	79.5%	79.4%	77.1%
Arrived on time	81.7%	78.2%	78.9%	77.6%
Cancelled	0.9%	1.1%	1.9%	0.9%
Average departure delay (late minutes only)	12.0 min	15.5 min	14.9 min	16.0 min
Scheduled departures a day	144	139	133	20,391
Scheduled departures	4,324	4,177	48,559	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
YX Republic Airline	1,208	28%	85.3%	-2.3 min	0.9%
WN Southwest Airlines	1,119	26%	76.9%	6.9 min	0.1%
AA American Airlines	712	16%	80.3%	5.8 min	1.5%
DL Delta Air Lines	375	9%	91.5%	-5.9 min	1.1%
OO SkyWest Airlines	279	6%	82.4%	2.1 min	1.4%
UA United Airlines	257	6%	74.7%	9.9 min	1.6%
G4 Allegiant Air	138	3%	73.2%	6.7 min	0.0%
F9 Frontier Airlines	76	2%	88.2%	-12.1 min	0.0%
AS Alaska Airlines	62	1%	91.9%	-7.3 min	0.0%
OH PSA Airlines	57	1%	71.9%	3.9 min	3.5%
MQ Envoy Air	37	1%	89.2%	-8.6 min	2.7%
NK Spirit Airlines	4	0%	75.0%	8.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
IND–ORD	Indianapolis to Chicago	572	80.1%	5.8 min	1.9%
IND–ATL	Indianapolis to Atlanta	257	87.5%	-2.8 min	1.6%
IND–LGA	Indianapolis to New York	219	81.7%	0.0 min	1.4%
IND–DEN	Indianapolis to Denver	216	78.7%	3.3 min	0.9%
IND–EWR	Indianapolis to Newark	181	91.7%	-12.1 min	1.1%
IND–DCA	Indianapolis to Washington	173	77.5%	2.2 min	2.9%
IND–CLT	Indianapolis to Charlotte	172	83.1%	-2.6 min	0.0%
IND–MCO	Indianapolis to Orlando	170	80.0%	5.9 min	0.0%
IND–BOS	Indianapolis to Boston	167	86.2%	-5.2 min	0.6%
IND–DFW	Indianapolis to Dallas/Fort Worth	166	83.1%	7.1 min	3.0%
IND–PHL	Indianapolis to Philadelphia	160	78.1%	10.1 min	1.3%
IND–PHX	Indianapolis to Phoenix	142	84.5%	-3.2 min	0.0%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), May 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	29.9%	33.0%	13,786
Late-arriving aircraft	41.8%	40.4%	19,248
National Aviation System	24.4%	20.5%	11,251
Extreme weather	3.9%	6.0%	1,776
Security	0.0%	0.1%	0

46,061 delay minutes on 747 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left IND on time in May 2026?

80.8% of 4,324 scheduled domestic departures left less than 15 minutes late, and 81.7% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 79.5% of 4,177 departures left on time and 1.1% were cancelled, against 80.8% and 0.9% in May 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for IND · methodology · corrections.