Carrier route record
WNPHX→MSY
Southwest Airlines · Phoenix to New Orleans
- Flights
- 550
- Period
- July 2025 to June 2026
- Share of route
- 59%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Southwest Airlines.
Southwest on PHX to MSY sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.6%. The late ones land roughly 50 minutes behind schedule. That rests on 550 flights, with a median arrival 4 minutes late.
The national on-time rate over the same period is 77.6%, so Southwest on PHX to MSY runs 9 points behind the country as a whole. Across a thousand flights that is about 86 extra late arrivals.
Key figures
On time
69.0%
Arrivals under 15 minutes late, of 548 completed flights
Avg delay
52 min
Across delayed arrivals only, not all flights
Cancelled
0.36%
National rate is 1.81%
Whole route
71.7%
Every carrier on PHX to MSY, 934 flights
These figures cover 550 flights between July 2025 and June 2026. Beyond the headline rate, 8.6% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Southwest against every carrier on PHX to MSY
Southwest flew 550 of the 934 flights on PHX to MSY, most of the route. Its 69.0% on time is 3 points worse than the route as a whole, which runs 71.7%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from American at 75.5% to Southwest at 69.0%. 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlines | 376 | 75.5% | 69 min | 0.80% | B+ |
| Frontier Airlinesthin sample | 4 | 75.0% | 24 min | 0.00% | B+ |
| Envoy Airthin sample | 4 | 75.0% | 21 min | 0.00% | B+ |
| Southwest Airlines (this page) | 550 | 69.0% | 52 min | 0.36% | C+ |
Departure window
When Southwest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 20 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am180 flights79.4%
- 11am–2pm71 flights66.2%
- 2pm–5pm10 flights—
- 5pm–8pm218 flights64.8%
- 8pm–5am71 flights59.2%
Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 59.2% on time, against 79.4% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5pm–8pm window is the busiest, with 218 flights scheduled in it.
Across the year
Southwest on PHX to MSY through the year
July is the worst month at 45.2% on time, 35 points below August, the best at 80.6%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. December was the busiest month here, with 60 flights.
Across the week, Saturday is the strongest day at 81.0% on time and Wednesday the weakest at 57.1%. 24 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Southwest runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 54% of the 8,842 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 54%Late-arriving aircraft
- 37%Carrier
- 8%National Airspace System
- 1%Extreme weather
54% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 8,842 reported delay minutes here, that single category outweighs weather by 54 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 8,842 reported delay minutes.
The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,281 of the 8,842 delay minutes reported here.
Cancellations are rare at 0.36%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
8.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last roughly 50 minutes, which a normal layover absorbs.
The 1,301 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 78.4% on time across 550 flights, 9 points above 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 9 points of difference.
One caution: this is a thin sample. 550 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.
What to do with this
Booking Southwest on PHX to MSY
Put together: treat all of this as provisional. 550 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 69.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 548 completed flights over 12 months sit behind that.
Related
Where to go next
- PHX to MSY, every carrier
- Southwest on MSY to PHX, the return leg
- American Airlines on PHX to MSY75.5%
- Southwest Airlines network-wide record
- Phoenix Sky Harbor International (PHX) delay statistics
- Louis Armstrong New Orleans International (MSY) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.