Williston Basin International in July 2025

75.5%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 July 2025, reporting carriers scheduled 216 domestic departures from Williston Basin International (XWA). 75.5% left less than 15 minutes late and 69.0% reached their destination on time; 0.9% were cancelled.

Nationally that month, 69.7% of flights departed on time and 69.0% arrived on time, so XWA departures were 5.8 points above the national departure figure.

A year earlier, in July 2024, the airport had 165 departures with 76.4% leaving on time: a change of −0.9 points, with flights up 31%.

Flights arriving at XWA that month were on time 70.8% of the time (216 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 42%, national aviation system 29% and late-arriving aircraft 20%.

On time 69.0%
Arrived 15+ minutes late 28.2%
Cancelled 0.9%
Diverted 1.9%

Every scheduled departure from XWA 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	XWA, 12 months to Jul 2026	All reported flights, Jul 2025
Departed on time	75.5%	76.4%	79.1%	69.7%
Arrived on time	69.0%	70.9%	76.5%	69.0%
Cancelled	0.9%	0.0%	1.5%	2.5%
Average departure delay (late minutes only)	30.0 min	18.6 min	25.4 min	24.3 min
Scheduled departures a day	7	6	7	21,048
Scheduled departures	216	165	2,411	631,428

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	216	100%	69.0%	29.0 min	0.9%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
XWA–DEN	Williston to Denver	154	64.9%	37.1 min	1.3%
XWA–MSP	Williston to Minneapolis	62	79.0%	9.7 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 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2025	Minutes
Air carrier	41.8%	31.1%	2,916
Late-arriving aircraft	19.8%	40.8%	1,377
National Aviation System	28.7%	20.7%	1,998
Extreme weather	9.8%	7.3%	680
Security	0.0%	0.1%	0

6,971 delay minutes on 61 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 2025?

75.5% of 216 scheduled domestic departures left less than 15 minutes late, and 69.0% 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, 76.4% of 165 departures left on time and 0.0% were cancelled, against 75.5% and 0.9% 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 XWA · methodology · corrections.