Bellingham International in September 2025

89.9%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 September 2025, reporting carriers scheduled 189 domestic departures from Bellingham International (BLI). 89.9% left less than 15 minutes late and 85.2% reached their destination on time; 0.5% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so BLI departures were 6.8 points above the national departure figure.

A year earlier, in September 2024, the airport had 153 departures with 80.4% leaving on time: a change of +9.5 points, with flights up 24%.

Flights arriving at BLI that month were on time 87.2% of the time (188 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 41%, national aviation system 24% and late-arriving aircraft 22%.

On time 85.2%
Arrived 15+ minutes late 14.3%
Cancelled 0.5%
Diverted 0.0%

Every scheduled departure from BLI 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	BLI, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	89.9%	80.4%	87.3%	83.1%
Arrived on time	85.2%	70.6%	84.4%	82.8%
Cancelled	0.5%	0.7%	1.5%	0.5%
Average departure delay (late minutes only)	7.8 min	18.6 min	10.9 min	12.2 min
Scheduled departures a day	6	5	6	18,748
Scheduled departures	189	153	2,237	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	120	63%	83.3%	2.0 min	0.0%
G4 Allegiant Air	69	37%	88.4%	-2.3 min	1.4%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BLI–SEA	Bellingham to Seattle	120	83.3%	2.0 min	0.0%
BLI–LAS	Bellingham to Las Vegas	39	87.2%	-1.3 min	2.6%
BLI–OAK	Bellingham to Oakland	13	100.0%	-10.2 min	0.0%
BLI–AZA	Bellingham to Phoenix	9	88.9%	1.0 min	0.0%
BLI–LAX	Bellingham to Los Angeles	8	75.0%	2.0 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), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	40.9%	34.3%	655
Late-arriving aircraft	21.5%	37.4%	344
National Aviation System	23.6%	22.6%	379
Extreme weather	14.0%	5.6%	225
Security	0.0%	0.1%	0

1,603 delay minutes on 27 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 BLI on time in September 2025?

89.9% of 189 scheduled domestic departures left less than 15 minutes late, and 85.2% 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, 80.4% of 153 departures left on time and 0.7% were cancelled, against 89.9% and 0.5% 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 BLI · methodology · corrections.