DLBOS→MSY

Delta flew 374 of the 863 flights on BOS to MSY, about 43% of it. Its 82.7% on time is 6 points better than the route as a whole, which runs 76.4%. Ranked by on-time rate it is first of four carriers on the route, where the range runs from Delta at 82.7% to American at 50.0%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

Delta on BOS to MSY often beats the schedule: 117 of 364 completed flights, 32%, arrived 15 minutes or more early. The 63 late arrivals split 28 under half an hour, 18 between 30 and 60 minutes, and 17 an hour or more.

The latest arrival of the period was on 22 April 2026, 7 hours 33 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

Badly late arrivals are rare here: only 4.7% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 1,367 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.

The return leg is a different operation and performs like one: it runs 62.9% on time across 372 flights, 20 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 20 points of difference.

One caution: this is a thin sample. 374 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.