Airline on-time performance
Delta Air Lines
Data through May 2026Source: US DOT · BTS
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On-time rate79%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.7%of scheduled flights
based on 1,039,445 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
Arrival performance
How this airline's flights land
System-wide arrival outcomes across every route this carrier flies.
79%of this carrier's flights arrived on time
(within 15 min of schedule)
(within 15 min of schedule)
- On time79%
- 15–59 min late12%
- 1–2 hr late4%
- 2 hr+ late3%
- Cancelled or diverted2%
Arrival outcomes for this carrier's flights. Last segment = cancelled or diverted (diverted flights are not separately tracked for carriers).
Bad day: 1 in 10 flights arrives more than 40 min late.
Over time
On-time trend
By season
On-time rate by month
When flights don't go
Why flights were cancelled
- Airline57%
- Weather40%
- Air traffic (NAS)3%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 17,410 cancellations with a reported cause (BTS reports causes from June 2003).
Route rankings
Carrier lineage
Northwest Airlines
Northwest merged into Delta
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