How reliable is Delta Air Lines?

82.2% of Delta Air Lines’s flights arrived within 15 minutes of schedule and 1.24% were cancelled in May 2026, across 91,955 flights — rank 2 of 8 major US carriers. It’s a monthly snapshot; the scorecard holds the trend.

Does It Deliver? · Airline

Is Delta Good for Business Travel?

Q: Is Delta Air Lines good for business travel?

In May 2026, Delta Air Lines was 82.2% on-time with a 1.24% cancellation rate (U.S. DOT), ranking 2 of 8 on punctuality, and scores 93/100 on the Deal-Day Airline Index for published deal-day commitments. On-time reliability is the best proxy for making your meeting.

Is this you? ›

By Rachel Julian, Editor-in-Chief · July 22, 2026 · 3 min read

How reliable is Delta, and what does it commit to for the deal day — the on-time record from U.S. DOT data plus its Deal-Day Airline Index score.

Direct answer: Delta Air Lines arrived on time 82.2% of the time with a 1.24% cancellation rate in May 2026 (U.S. DOT), ranking 2 of 8 major US carriers on punctuality, and scores 93/100 on the Deal-Day Airline Index for its published deal-day commitments (rank #2). For business travel, that combination — does it get you there on time, and what has it put in writing for the day a deal depends on the flight — is the measure that matters.

“Is Delta good for business travel?” has two halves: does it get you there on time, and what has it put in writing for the day a deal depends on the flight. Here is both, from the record.

Does Delta Air Lines get you there on time?

On-time arrivals (within 15 min)	82.2%
Cancellation rate	1.24%
Rank, on-time (of 8 carriers)	2
Flights operated	91,955

U.S. DOT Bureau of Transportation Statistics, May 2026. A single-month snapshot, updated monthly — see the full Delta Air Lines scorecard.

What Delta Air Lines commits to for the deal day

Dimension	Score	Published checks
Connectivity aloft	2/3
Schedule control	3/3
Disruption recovery	3/3
Work & rest onboard	3/3
Admin speed	3/3

Delta Air Lines: 93/100, rank #2 on the Deal-Day Airline Index — published commitments only.

The read

Commits to nearly everything an airline can put in writing — free Wi-Fi, disruption care, auto-rebooking. Loses a point where the whole industry does: power at every seat.

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Delta Air Lines scorecard

The running DOT record.

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Delta Air Lines’s reliability is computed from U.S. DOT BTS data (May 2026); commitment score from the Deal-Day Airline Index (published commitments). Independent and reader-funded — a partnership buys reach, never a rating.