Alaska vs Frontier: On-Time Performance Compared

Last 12 months · Aug 2025 – Jul 2026

Data through July 2026 · Last updated October 18, 2026

Over the last 12 months 79.6% of Alaska flights arrived on time, compared with 73.1% for Frontier.

Alaska cancelled fewer flights (1.2% vs 1.9%), and late flights averaged 52 minutes late on Alaska vs 83 on Frontier.

On the 28 routes both airlines fly regularly, Alaska had the better on-time record on 20 and Frontier on 8.

Alaska vs Frontier: key numbers

Last 12 months, all flights each airline operated.

AlaskaFrontier

On-time arrivals79.6%73.1%

On-time departures79.9%73.6%

Cancelled1.2%1.9%

Diverted0.3%0.2%

On-time arrival % each month, last 24 months.

AlaskaFrontier

60%70%80%90%

Aug ’24Nov ’24Feb ’25May ’25Aug ’25Nov ’25Feb ’26May ’26

Share of each airline’s reported delay minutes by cause, last 12 months.

AlaskaFrontier

Airline (carrier)33.1%26.1%

Weather4.4%2.8%

Air traffic system (NAS)24.1%19.5%

Security0.4%0.0%

Late-arriving aircraft37.9%51.6%

28 routes where each airline had at least 100 completed flights in the last 12 months; the 25 busiest are shown. Better on-time rate in bold.

Route	Alaska on time	Frontier on time	Alaska flights	Frontier flights
SEA → LAX	80.7%	80.4%	3,289	295
LAX → SEA	85.3%	81.8%	3,287	295
SEA → PHX	79.1%	70.7%	2,887	139
PHX → SEA	84.5%	84.9%	2,884	139
SEA → LAS	78.8%	68.5%	2,622	260
LAS → SEA	83.1%	81.6%	2,621	260
LAX → PDX	90.0%	87.1%	1,846	219
PDX → LAX	86.0%	84.2%	1,845	219
SFO → LAS	75.2%	63.8%	1,114	895
LAS → SFO	64.8%	62.4%	1,114	893
DEN → SEA	74.9%	79.5%	1,551	431
SEA → DEN	77.9%	77.2%	1,551	431
LAS → PDX	83.5%	75.1%	1,557	179
PDX → LAS	83.7%	72.1%	1,557	179
ONT → SEA	82.2%	82.1%	1,259	169
SEA → ONT	77.1%	83.7%	1,259	169
LAX → SFO	51.2%	49.5%	864	391
SFO → LAX	68.1%	68.5%	862	390
SAN → DEN	85.3%	81.7%	495	705
DEN → SAN	83.6%	80.8%	495	704
PDX → DEN	79.7%	79.9%	613	281
DEN → PDX	80.2%	83.5%	612	280
PHX → SAN	85.5%	74.5%	218	389
SAN → PHX	77.9%	70.3%	217	388
SFO → SAN	86.7%	52.0%	304	206