Allegiant vs Southwest: On-Time Performance Compared

Last 12 months · Aug 2025 – Jul 2026

Data through July 2026 · Last updated October 18, 2026

Southwest was more punctual than Allegiant over the last 12 months: 76.4% of its flights arrived on time, against 74.0%.

Allegiant cancelled fewer flights (0.7% vs 0.9%), and late flights averaged 88 minutes late on Allegiant vs 53 on Southwest.

On the 24 routes both airlines fly regularly, Allegiant had the better on-time record on 8 and Southwest on 16.

Allegiant vs Southwest: key numbers

Last 12 months, all flights each airline operated.

AllegiantSouthwest

On-time arrivals74.0%76.4%

On-time departures75.9%71.8%

Cancelled0.7%0.9%

Diverted0.3%0.2%

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

AllegiantSouthwest

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.

AllegiantSouthwest

Airline (carrier)31.4%28.4%

Weather11.2%2.3%

Air traffic system (NAS)17.8%17.9%

Security0.2%0.3%

Late-arriving aircraft39.3%51.1%

24 routes where each airline had at least 100 completed flights in the last 12 months. Better on-time rate in bold.

Route	Allegiant on time	Southwest on time	Allegiant flights	Southwest flights
FAT → LAS	77.2%	85.2%	644	1,070
LAS → FAT	83.0%	74.3%	644	1,070
GEG → LAS	55.8%	86.4%	105	750
LAS → GEG	71.2%	76.5%	105	750
LAS → TUL	84.1%	75.5%	108	634
TUL → LAS	76.6%	82.6%	108	634
FLL → IND	64.4%	62.2%	236	419
IND → FLL	68.3%	82.8%	236	416
DSM → LAS	75.1%	84.6%	230	365
LAS → DSM	81.5%	77.1%	230	365
EUG → LAS	59.8%	74.5%	107	366
ICT → LAS	63.9%	80.8%	108	365
LAS → EUG	86.9%	85.5%	107	366
LAS → ICT	70.1%	74.4%	108	365
LAS → MEM	82.9%	69.0%	105	321
MEM → LAS	71.4%	81.5%	105	321
GRR → LAS	74.8%	75.1%	210	175
LAS → GRR	80.4%	81.5%	210	175
IND → SRQ	73.9%	78.7%	177	174
SRQ → IND	72.2%	71.7%	177	174
PIT → SRQ	78.7%	80.8%	166	174
SRQ → PIT	76.2%	72.5%	166	174
MCO → TYS	59.6%	75.2%	115	149
TYS → MCO	74.1%	78.1%	115	149