Williston Basin International in July 2026

79.0%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 2026, reporting carriers scheduled 200 domestic departures from Williston Basin International (XWA). 79.0% left less than 15 minutes late and 73.5% reached their destination on time; 0.0% were cancelled.

Nationally that month, 68.8% of flights departed on time and 69.4% arrived on time, so XWA departures were 10.2 points above the national departure figure.

A year earlier, in July 2025, the airport had 216 departures with 75.5% leaving on time: a change of +3.5 points, with flights down 7%.

Flights arriving at XWA that month were on time 79.5% of the time (200 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 45%, air carrier 37% and late-arriving aircraft 9%.

On time 73.5%
Arrived 15+ minutes late 24.5%
Cancelled 0.0%
Diverted 2.0%

Every scheduled departure from XWA in July 2026, judged by arrival at the destination.

July 2026 against a year earlier, the airport's year and the nation

Measure	Jul 2026	Jul 2025	XWA, 12 months to Jul 2026	All reported flights, Jul 2026
Departed on time	79.0%	75.5%	79.1%	68.8%
Arrived on time	73.5%	69.0%	76.5%	69.4%
Cancelled	0.0%	0.9%	1.5%	2.6%
Average departure delay (late minutes only)	22.3 min	30.0 min	25.4 min	24.1 min
Scheduled departures a day	7	7	7	21,066
Scheduled departures	200	216	2,411	631,970

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	200	100%	73.5%	13.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
XWA–DEN	Williston to Denver	111	69.4%	21.2 min	0.0%
XWA–MSP	Williston to Minneapolis	89	78.7%	4.2 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), July 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2026	Minutes
Air carrier	36.9%	31.7%	1,589
Late-arriving aircraft	8.9%	41.8%	385
National Aviation System	44.8%	19.9%	1,928
Extreme weather	8.6%	6.5%	371
Security	0.7%	0.1%	30

4,303 delay minutes on 49 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 XWA on time in July 2026?

79.0% of 200 scheduled domestic departures left less than 15 minutes late, and 73.5% reached their destination on time. The national figures that month were 68.8% and 69.4%.

How does that compare with a year earlier?

In July 2025, 75.5% of 216 departures left on time and 0.9% were cancelled, against 79.0% and 0.0% in July 2026.

Provenance

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