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Airline Operational Performance · DL

Delta Air Lines Network

Historical monthly on-time arrival performance and rankings for Delta Air Lines Network.

Latest data: May 2026Source: DOT Air Travel Consumer ReportFlightline Intel Beta
Latest OTP
81.2%
+3.4 points year over year
Latest monthly rank
#1
Reporting marketing carriers
Latest YTD OTP
79.0%
YTD rank #2
12-month average
78.2%
39 months in current record

Historical Monthly Performance

Monthly percentage of reported operations arriving within 15 minutes of schedule.

Record High and Low

MeasureMonthOTPRank
Best monthOct 202390.7%#1
Weakest monthJul 202467.6%#7

Latest 12 Months

MonthOTPRankYTDYTD rank
May 202681.2%#179.0%#2
Apr 202683.1%#278.4%#2
Mar 202674.9%#376.7%#4
Feb 202680.0%#477.8%#4
Jan 202675.7%#475.7%#4
Dec 202571.0%#679.3%#2
Nov 202580.1%#180.0%#2
Oct 202583.7%#180.0%#2
Aug 202583.1%#278.6%#2
Jul 202574.0%#278.0%#2
Jun 202573.3%#378.7%#3
May 202577.8%#279.9%#3
Flightline Intel readout: Delta Air Lines Network posted 81.2 percent on-time arrivals in May 2026, ranking #1. Its trailing 12-month average is 78.2 percent. The strongest month in the current database was Oct 2023 at 90.7 percent.