Indianapolis International in May 2025

79.5%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 2025, reporting carriers scheduled 4,177 domestic departures from Indianapolis International (IND). 79.5% left less than 15 minutes late and 78.2% reached their destination on time; 1.1% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so IND departures were 2.8 points above the national departure figure.

A year earlier, in May 2024, the airport had 4,138 departures with 78.4% leaving on time: a change of +1.1 points, with flights up 1%.

Flights arriving at IND that month were on time 75.3% of the time (4,173 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 39%, late-arriving aircraft 32% and air carrier 27%.

On time 78.2%
Arrived 15+ minutes late 20.5%
Cancelled 1.1%
Diverted 0.2%

Every scheduled departure from IND in May 2025, judged by arrival at the destination.

May 2025 against a year earlier, the airport's year and the nation

Measure	May 2025	May 2024	IND, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	79.5%	78.4%	79.4%	76.7%
Arrived on time	78.2%	77.2%	78.9%	75.4%
Cancelled	1.1%	1.2%	1.9%	1.0%
Average departure delay (late minutes only)	15.5 min	16.7 min	14.9 min	17.5 min
Scheduled departures a day	139	138	133	20,188
Scheduled departures	4,177	4,138	48,559	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
YX Republic Airline	1,245	30%	78.8%	8.3 min	1.6%
WN Southwest Airlines	1,059	25%	79.4%	6.3 min	0.5%
AA American Airlines	584	14%	73.5%	22.6 min	1.0%
DL Delta Air Lines	402	10%	85.6%	-2.6 min	0.5%
UA United Airlines	234	6%	75.6%	6.1 min	1.7%
NK Spirit Airlines	210	5%	76.2%	11.5 min	1.4%
G4 Allegiant Air	150	4%	75.3%	15.1 min	0.0%
MQ Envoy Air	86	2%	81.4%	8.0 min	0.0%
F9 Frontier Airlines	84	2%	65.5%	25.2 min	1.2%
AS Alaska Airlines	62	1%	72.6%	5.1 min	1.6%
OO SkyWest Airlines	40	1%	87.5%	0.6 min	0.0%
OH PSA Airlines	21	1%	81.0%	2.4 min	9.5%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
IND–ORD	Indianapolis to Chicago	424	85.1%	0.7 min	0.0%
IND–ATL	Indianapolis to Atlanta	306	84.0%	0.6 min	0.0%
IND–LGA	Indianapolis to New York	233	73.4%	15.5 min	0.9%
IND–DEN	Indianapolis to Denver	216	77.3%	12.5 min	0.9%
IND–MCO	Indianapolis to Orlando	216	77.3%	5.7 min	0.9%
IND–DCA	Indianapolis to Washington	186	78.5%	14.4 min	1.6%
IND–PHL	Indianapolis to Philadelphia	179	71.5%	20.1 min	2.2%
IND–BOS	Indianapolis to Boston	173	70.5%	15.0 min	0.6%
IND–DFW	Indianapolis to Dallas/Fort Worth	172	68.6%	29.9 min	1.7%
IND–CLT	Indianapolis to Charlotte	157	75.8%	8.2 min	1.3%
IND–PHX	Indianapolis to Phoenix	150	80.0%	13.3 min	0.0%
IND–LAS	Indianapolis to Las Vegas	149	85.9%	-3.4 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 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	26.8%	29.3%	17,219
Late-arriving aircraft	31.8%	37.8%	20,416
National Aviation System	39.0%	25.9%	25,020
Extreme weather	2.3%	6.9%	1,500
Security	0.0%	0.1%	0

64,155 delay minutes on 857 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 2025?

79.5% of 4,177 scheduled domestic departures left less than 15 minutes late, and 78.2% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 78.4% of 4,138 departures left on time and 1.2% were cancelled, against 79.5% and 1.1% in May 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2025; 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.