Airline profile · DL

Delta Air Lines

On-time performance, cancellations and route reliability, calculated from 3,052,362 flights.

Reliability

July 2023 – June 2026

Airline Reliability Score

72/ 100Good

Better than 90% of US reporting carriers (15 compared)

Calculated from 3,052,362 flights. How this is calculated

On-time arrivals

82.3%

2,478,087 of 3,010,827

Cancellation rate

1.12%

34,278 cancelled

Median arrival delay

-8 min

Average 3.6 min

Severe delays

6.2%

60+ minutes late

Delay when late

72 min

Average, when 15+ min late

Departure punctuality

82.4%

Left the gate on time

Over the last 12 months Delta Air Lines arrived on time 81.6% of the time, against 81.0% in the 12 months before — broadly unchanged.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – June 2026

Performance over time

What causes the delays

Share of total reported delay minutes by cause, as classified by the operating carrier.

Carrier46%

Late-arriving aircraft30%

National airspace system20%

Weather5%

Security0%

Source: US DOT BTS delay cause categories · July 2023 – June 2026 · Cause minutes are only reported for arrivals delayed 15 minutes or more.

Where this airline flies

Departure performance at the airports FlyerIntel covers.

Airport	Departures	On time	Cancelled	Median delay
ATL Atlanta	695,955	80.2%	1.18%	-5 min
MSP Minneapolis	201,837	81.4%	0.76%	-8 min
DTW Detroit	178,164	79.8%	0.94%	-7 min
SLC Salt Lake City	163,115	83.4%	0.57%	-8 min
LAX Los Angeles	110,376	82.5%	0.70%	-8 min
SEA Seattle	96,776	83.5%	0.67%	-8 min
JFK New York	91,128	79.5%	1.44%	-10 min
LGA New York	83,974	77.5%	2.26%	-10 min
BOS Boston	77,739	78.7%	1.24%	-8 min
MCO Orlando	64,207	78.2%	1.34%	-7 min
LAS Las Vegas	48,195	84.9%	0.75%	-10 min
SFO San Francisco	39,922	82.1%	0.79%	-9 min

Strongest airports

SJC (91.7%), PDX (90.3%), STL (88.4%)

Weakest airports

MIA (74.3%), EWR (77.3%), LGA (77.5%)

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026

Route performance

Most reliable routes

OAK→SLCOakland to Salt Lake City94.7%SJC→ATLSan Jose to Atlanta92.9%PDX→SEAPortland to Seattle92.3%PDX→MSPPortland to Minneapolis91.5%SJC→SLCSan Jose to Salt Lake City91.4%PDX→SLCPortland to Salt Lake City91.4%PDX→LAXPortland to Los Angeles90.9%SJC→MSPSan Jose to Minneapolis90.3%

Least reliable routes

MIA→RDUMiami to Raleigh–Durham68.3%MIA→BOSMiami to Boston68.9%MSY→BOSNew Orleans to Boston70.0%MIA→JFKMiami to New York71.1%ATL→MCOAtlanta to Orlando71.1%BOS→ORDBoston to Chicago71.1%SLC→SFOSalt Lake City to San Francisco71.1%ATL→MIAAtlanta to Miami71.2%

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Routes with fewer than 600 flights by this carrier are not ranked.

Compare airlines

Every carrier on FlyerIntel is measured the same way, over the same period, using the same source data. See all airlines ranked →

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