Mahlon Sweet Field in September 2025

86.7%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 September 2025, reporting carriers scheduled 723 domestic departures from Mahlon Sweet Field (EUG). 86.7% left less than 15 minutes late and 85.8% reached their destination on time; 0.8% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so EUG departures were 3.6 points above the national departure figure.

A year earlier, in September 2024, the airport had 526 departures with 85.6% leaving on time: a change of +1.1 points, with flights up 37%.

Flights arriving at EUG that month were on time 85.9% of the time (723 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 38%, air carrier 33% and national aviation system 23%.

On time 85.8%
Arrived 15+ minutes late 12.9%
Cancelled 0.8%
Diverted 0.6%

Every scheduled departure from EUG in September 2025, judged by arrival at the destination.

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

Measure	Sep 2025	Sep 2024	EUG, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	86.7%	85.6%	82.3%	83.1%
Arrived on time	85.8%	84.6%	82.0%	82.8%
Cancelled	0.8%	0.0%	0.7%	0.5%
Average departure delay (late minutes only)	8.2 min	14.0 min	13.7 min	12.2 min
Scheduled departures a day	24	18	24	18,748
Scheduled departures	723	526	8,899	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	324	45%	88.9%	-3.0 min	0.3%
WN Southwest Airlines	134	19%	86.6%	0.4 min	0.0%
UA United Airlines	126	17%	79.4%	3.7 min	2.4%
AS Alaska Airlines	90	12%	87.8%	-1.0 min	2.2%
AA American Airlines	32	4%	75.0%	5.3 min	0.0%
G4 Allegiant Air	17	2%	76.5%	3.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
EUG–SEA	Eugene to Seattle	210	90.5%	-5.1 min	0.5%
EUG–DEN	Eugene to Denver	116	78.4%	7.7 min	0.9%
EUG–SFO	Eugene to San Francisco	90	80.0%	2.8 min	2.2%
EUG–SLC	Eugene to Salt Lake City	60	98.3%	-9.2 min	0.0%
EUG–LAS	Eugene to Las Vegas	38	76.3%	5.1 min	0.0%
EUG–PHX	Eugene to Phoenix	31	77.4%	4.7 min	0.0%
EUG–LAX	Eugene to Los Angeles	30	66.7%	19.0 min	0.0%
EUG–OAK	Eugene to Oakland	30	96.7%	-9.4 min	0.0%
EUG–PDX	Eugene to Portland	30	93.3%	-1.8 min	0.0%
EUG–SAN	Eugene to San Diego	30	83.3%	-9.0 min	6.7%
EUG–SMF	Eugene to Sacramento	30	100.0%	-10.9 min	0.0%
EUG–SJC	Eugene to San Jose	17	88.2%	1.5 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), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	32.9%	34.3%	1,745
Late-arriving aircraft	37.6%	37.4%	1,992
National Aviation System	23.0%	22.6%	1,219
Extreme weather	6.5%	5.6%	343
Security	0.0%	0.1%	0

5,299 delay minutes on 93 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 EUG on time in September 2025?

86.7% of 723 scheduled domestic departures left less than 15 minutes late, and 85.8% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 85.6% of 526 departures left on time and 0.0% were cancelled, against 86.7% and 0.8% in September 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for EUG · methodology · corrections.