Which Airlines Are Likeliest to Be Late at DIA?

Additional images below.EXPAND
Additional images below.
File photo

As we enter summer-vacation season, a lot of us will be jetting off to far-flung destinations.

And thanks to the central location of Denver International Airport, we have a lot of carriers from which to choose.

But which of them are likeliest to be on-time — and which definitely aren't?

The U.S. Department of Transportation's Bureau of Transportation Statistics keeps track of this data, and its website allows users to search specific airports, including DIA, and the carriers that fly in and out of them.

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When we ran the numbers for DIA from March 2014 to March 2015 (the latter being the most recent month for which stats are available), we came up with some surprising information. Frontier, which scored terribly in a customer-satisfaction report last month, is in the middle of the pack, not near the bottom. Likewise, Southwest, which is often thought to be the most tightly run airship firm, didn't come out on top, although its digits are quite good.

The lowest-performing airline, meanwhile, was late nearly 35 percent of the time. That's not a passing grade.

See the on-time stats for the dozen listed by the bureau, plus a lot of other facts and figures, in the photo-illustrated countdown below.

Alaska Air.
Alaska Air.
YouTube file photo

Number 1: Alaska Airlines Inc. (AS) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 87.63%
Air Carrier Delay: 4.11%
Aircraft Arriving Late: 2.65%
Security Delay: 0.02%
National Aviation System Delay: 5.2%
Extreme Weather: 0.27%
Cancelled & Diverted: 0.12%

Delta Airlines.
Delta Airlines.
YouTube file photo

Number 2: Delta Airlines Inc. (DL) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 82.28%
Air Carrier Delay: 6.01%
Aircraft Arriving Late: 3.37%
Security Delay: 0.01%
National Aviation System Delay: 6.96%
Extreme Weather: 0.8%
Cancelled & Diverted: 0.56%

United Airlines.
United Airlines.
YouTube file photo

Number 3: United Airlines Inc. (UA) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 79.67%
Air Carrier Delay: 6.4%
Aircraft Arriving Late: 5.76%
Security Delay: 0%
National Aviation System Delay: 6.13%
Extreme Weather: 0.77%
Cancelled & Diverted: 1.27%

Southwest Airlines.
Southwest Airlines.
YouTube file photo

Number 4: Southwest Airlines Co. (WN) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 78.67%
Air Carrier Delay: 5.64%
Aircraft Arriving Late: 9.72%
Security Delay: 0.04%
National Aviation System Delay: 4.26%
Extreme Weather: 0.81%
Cancelled & Diverted: 0.87%

US Airways.
US Airways.
YouTube file photo

Number 5: US Airways Inc. (US) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 77.9%
Air Carrier Delay: 7.95%
Aircraft Arriving Late: 4.12%
Security Delay: 0.07%
National Aviation System Delay: 8.72%
Extreme Weather: 0.39%
Cancelled & Diverted: 0.84%

Frontier Airlines.
Frontier Airlines.
YouTube file photo

Number 6: Frontier Airlines Inc. (F9) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 77.39%
Air Carrier Delay: 3.93%
Aircraft Arriving Late: 6.48%
Security Delay: 0%
National Aviation System Delay: 11.48%
Extreme Weather: 0.18%
Cancelled & Diverted: 0.55%

SkyWest Airlines.
SkyWest Airlines.
YouTube file photo

Number 7: SkyWest Airlines Inc. (OO) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 76.35%
Air Carrier Delay: 3.28%
Aircraft Arriving Late: 11.02%
Security Delay: 0.02%
National Aviation System Delay: 5.88%
Extreme Weather: 0.4%
Cancelled & Diverted: 3.04%

ExpressJet Airlines.
ExpressJet Airlines.
YouTube file photo

Number 8: ExpressJet Airlines Inc. (EV) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 75.81%
Air Carrier Delay: 3.33%
Aircraft Arriving Late: 9.43%
Security Delay: 0%
National Aviation System Delay: 7.18%
Extreme Weather: 0.43%
Cancelled & Diverted: 3.83%

American Airlines.
American Airlines.
YouTube file photo

Number 9: American Airlines Inc. (AA) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 73.71%
Air Carrier Delay: 9.47%
Aircraft Arriving Late: 7.56%
Security Delay: 0.03%
National Aviation System Delay: 6.23%
Extreme Weather: 1.32%
Cancelled & Diverted: 1.69%

JetBlue Airways.
JetBlue Airways.
YouTube file photo

Number 10: JetBlue Airways (B6) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 68.57%
Air Carrier Delay: 9.76%
Aircraft Arriving Late: 8.34%
Security Delay: 0.14%
National Aviation System Delay: 11.02%
Extreme Weather: 0.56%
Cancelled & Diverted: 1.61%

Spirit Airlines.
Spirit Airlines.
YouTube file photo

Number 11: Spirit Airlines (NK) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 67.46%
Air Carrier Delay: 8.54%
Aircraft Arriving Late: 6.45%
Security Delay: 0.31%
National Aviation System Delay: 14.7%
Extreme Weather: 0.74%
Cancelled & Diverted: 1.79%

Envoy Air.
Envoy Air.
YouTube file photo

Number 12: Envoy Air (MQ) - Denver, CO: Denver International (March, 2014 - March, 2015)
On Time: 65.81%
Air Carrier Delay: 8.67%
Aircraft Arriving Late: 10.46%
Security Delay: 0%
National Aviation System Delay: 8.96%
Extreme Weather: 0.63%
Cancelled & Diverted: 5.47%

Send your story tips to the author, Michael Roberts.

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