Duluth International in July 2025

76.8%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 July 2025, reporting carriers scheduled 211 domestic departures from Duluth International (DLH). 76.8% left less than 15 minutes late and 73.5% reached their destination on time; 1.4% were cancelled.

Nationally that month, 69.7% of flights departed on time and 69.0% arrived on time, so DLH departures were 7.1 points above the national departure figure.

A year earlier, in July 2024, the airport had 208 departures with 83.2% leaving on time: a change of −6.4 points, with flights up 1%.

Flights arriving at DLH that month were on time 77.8% of the time (212 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, extreme weather 33%, air carrier 30% and national aviation system 21%.

On time 73.5%
Arrived 15+ minutes late 25.1%
Cancelled 1.4%
Diverted 0.0%

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

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

Measure	Jul 2025	Jul 2024	DLH, 12 months to Jul 2026	All reported flights, Jul 2025
Departed on time	76.8%	83.2%	76.9%	69.7%
Arrived on time	73.5%	80.3%	72.7%	69.0%
Cancelled	1.4%	1.0%	3.6%	2.5%
Average departure delay (late minutes only)	31.3 min	16.5 min	24.5 min	24.3 min
Scheduled departures a day	7	7	7	21,048
Scheduled departures	211	208	2,429	631,428

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	211	100%	73.5%	24.2 min	1.4%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DLH–ORD	Duluth to Chicago	113	61.1%	44.2 min	2.7%
DLH–MSP	Duluth to Minneapolis	98	87.8%	1.6 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), July 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2025	Minutes
Air carrier	29.8%	31.1%	2,010
Late-arriving aircraft	16.7%	40.8%	1,126
National Aviation System	20.9%	20.7%	1,408
Extreme weather	32.5%	7.3%	2,190
Security	0.0%	0.1%	0

6,734 delay minutes on 53 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 July 2025?

76.8% of 211 scheduled domestic departures left less than 15 minutes late, and 73.5% reached their destination on time. The national figures that month were 69.7% and 69.0%.

How does that compare with a year earlier?

In July 2024, 83.2% of 208 departures left on time and 1.0% were cancelled, against 76.8% and 1.4% in July 2025.

Provenance

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