Duluth International in May 2026

88.3%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 257 domestic departures from Duluth International (DLH). 88.3% left less than 15 minutes late and 83.3% reached their destination on time; 0.4% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so DLH departures were 11.2 points above the national departure figure.

A year earlier, in May 2025, the airport had 175 departures with 89.7% leaving on time: a change of −1.4 points, with flights up 47%.

Flights arriving at DLH that month were on time 78.5% of the time (256 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 44%, late-arriving aircraft 32% and extreme weather 13%.

On time 83.3%
Arrived 15+ minutes late 16.3%
Cancelled 0.4%
Diverted 0.0%

Every scheduled departure from DLH 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	DLH, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	88.3%	89.7%	76.9%	77.1%
Arrived on time	83.3%	86.3%	72.7%	77.6%
Cancelled	0.4%	0.0%	3.6%	0.9%
Average departure delay (late minutes only)	13.9 min	10.1 min	24.5 min	16.0 min
Scheduled departures a day	9	6	7	20,391
Scheduled departures	257	175	2,429	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	257	100%	83.3%	4.8 min	0.4%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DLH–ORD	Duluth to Chicago	135	73.3%	16.7 min	0.7%
DLH–MSP	Duluth to Minneapolis	122	94.3%	-8.3 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 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	44.4%	33.0%	1,640
Late-arriving aircraft	32.2%	40.4%	1,190
National Aviation System	10.4%	20.5%	385
Extreme weather	12.9%	6.0%	478
Security	0.0%	0.1%	0

3,693 delay minutes on 42 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 2026?

88.3% of 257 scheduled domestic departures left less than 15 minutes late, and 83.3% 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, 89.7% of 175 departures left on time and 0.0% were cancelled, against 88.3% and 0.4% 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 DLH · methodology · corrections.