Duluth International in May 2025

89.7%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 175 domestic departures from Duluth International (DLH). 89.7% left less than 15 minutes late and 86.3% reached their destination on time; 0.0% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so DLH departures were 13.0 points above the national departure figure.

A year earlier, in May 2024, the airport had 176 departures with 80.1% leaving on time: a change of +9.6 points, with flights down 1%.

Flights arriving at DLH that month were on time 84.6% of the time (175 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 68%, national aviation system 12% and extreme weather 12%.

On time 86.3%
Arrived 15+ minutes late 13.7%
Cancelled 0.0%
Diverted 0.0%

Every scheduled departure from DLH 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	DLH, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	89.7%	80.1%	76.9%	76.7%
Arrived on time	86.3%	81.3%	72.7%	75.4%
Cancelled	0.0%	1.7%	3.6%	1.0%
Average departure delay (late minutes only)	10.1 min	20.2 min	24.5 min	17.5 min
Scheduled departures a day	6	6	7	20,188
Scheduled departures	175	176	2,429	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	175	100%	86.3%	3.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DLH–ORD	Duluth to Chicago	90	84.4%	12.2 min	0.0%
DLH–MSP	Duluth to Minneapolis	85	88.2%	-5.3 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	67.7%	29.3%	1,305
Late-arriving aircraft	7.6%	37.8%	146
National Aviation System	12.4%	25.9%	240
Extreme weather	11.8%	6.9%	227
Security	0.5%	0.1%	10

1,928 delay minutes on 24 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 May 2025?

89.7% of 175 scheduled domestic departures left less than 15 minutes late, and 86.3% 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, 80.1% of 176 departures left on time and 1.7% were cancelled, against 89.7% and 0.0% 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 DLH · methodology · corrections.