Mahlon Sweet Field in December 2025

76.9%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 December 2025, reporting carriers scheduled 757 domestic departures from Mahlon Sweet Field (EUG). 76.9% left less than 15 minutes late and 78.5% reached their destination on time; 0.8% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so EUG departures were 4.9 points above the national departure figure.

A year earlier, in December 2024, the airport had 659 departures with 76.6% leaving on time: a change of +0.3 points, with flights up 15%.

Flights arriving at EUG that month were on time 78.7% of the time (756 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 47%, air carrier 32% and national aviation system 19%.

On time 78.5%
Arrived 15+ minutes late 20.5%
Cancelled 0.8%
Diverted 0.3%

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

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

Measure	Dec 2025	Dec 2024	EUG, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	76.9%	76.6%	82.3%	72.0%
Arrived on time	78.5%	77.5%	82.0%	71.9%
Cancelled	0.8%	1.4%	0.7%	1.5%
Average departure delay (late minutes only)	17.2 min	20.0 min	13.7 min	21.2 min
Scheduled departures a day	25	22	24	19,410
Scheduled departures	757	659	8,899	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	325	43%	81.5%	1.2 min	1.2%
WN Southwest Airlines	150	20%	70.0%	18.2 min	0.7%
UA United Airlines	127	17%	78.7%	7.3 min	0.0%
AS Alaska Airlines	61	8%	88.5%	-8.0 min	1.6%
AA American Airlines	60	8%	86.7%	6.9 min	0.0%
G4 Allegiant Air	34	4%	52.9%	18.4 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
EUG–SEA	Eugene to Seattle	150	88.7%	-5.4 min	0.0%
EUG–DEN	Eugene to Denver	91	72.5%	17.5 min	1.1%
EUG–SFO	Eugene to San Francisco	91	70.3%	13.7 min	1.1%
EUG–SLC	Eugene to Salt Lake City	62	93.5%	-14.1 min	0.0%
EUG–PHX	Eugene to Phoenix	59	86.4%	7.0 min	0.0%
EUG–LAX	Eugene to Los Angeles	47	83.0%	14.6 min	2.1%
EUG–LAS	Eugene to Las Vegas	42	54.8%	26.7 min	0.0%
EUG–SAN	Eugene to San Diego	42	69.0%	6.5 min	2.4%
EUG–PDX	Eugene to Portland	39	82.1%	-2.6 min	2.6%
EUG–BUR	Eugene to Burbank	31	77.4%	-3.3 min	3.2%
EUG–OAK	Eugene to Oakland	31	80.6%	4.8 min	0.0%
EUG–SMF	Eugene to Sacramento	31	77.4%	10.0 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	31.8%	33.3%	3,677
Late-arriving aircraft	47.0%	41.1%	5,436
National Aviation System	19.0%	19.1%	2,198
Extreme weather	1.6%	6.4%	187
Security	0.7%	0.2%	77

11,575 delay minutes on 155 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 December 2025?

76.9% of 757 scheduled domestic departures left less than 15 minutes late, and 78.5% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 76.6% of 659 departures left on time and 1.4% were cancelled, against 76.9% and 0.8% in December 2025.

Provenance

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