Duluth International in April 2025

87.5%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 April 2025, reporting carriers scheduled 168 domestic departures from Duluth International (DLH). 87.5% left less than 15 minutes late and 83.9% reached their destination on time; 1.2% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so DLH departures were 6.9 points above the national departure figure.

A year earlier, in April 2024, the airport had 172 departures with 92.4% leaving on time: a change of −4.9 points, with flights down 2%.

Flights arriving at DLH that month were on time 81.0% of the time (168 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 37%, extreme weather 27% and air carrier 27%.

On time 83.9%
Arrived 15+ minutes late 14.9%
Cancelled 1.2%
Diverted 0.0%

Every scheduled departure from DLH in April 2025, judged by arrival at the destination.

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

Measure	Apr 2025	Apr 2024	DLH, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	87.5%	92.4%	76.9%	80.6%
Arrived on time	83.9%	93.0%	72.7%	79.5%
Cancelled	1.2%	0.0%	3.6%	0.8%
Average departure delay (late minutes only)	10.3 min	5.3 min	24.5 min	14.1 min
Scheduled departures a day	6	6	7	19,465
Scheduled departures	168	172	2,429	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	167	99%	83.8%	3.2 min	1.2%
YX Republic Airline	1	1%	100.0%	-22.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DLH–MSP	Duluth to Minneapolis	86	91.9%	-7.3 min	0.0%
DLH–ORD	Duluth to Chicago	82	75.6%	14.1 min	2.4%

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), April 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2025	Minutes
Air carrier	27.2%	32.7%	489
Late-arriving aircraft	37.3%	39.4%	670
National Aviation System	8.0%	22.2%	144
Extreme weather	27.4%	5.5%	493
Security	0.0%	0.2%	0

1,796 delay minutes on 25 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 DLH on time in April 2025?

87.5% of 168 scheduled domestic departures left less than 15 minutes late, and 83.9% reached their destination on time. The national figures that month were 80.6% and 79.5%.

How does that compare with a year earlier?

In April 2024, 92.4% of 172 departures left on time and 0.0% were cancelled, against 87.5% and 1.2% in April 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for DLH · methodology · corrections.