PlainFlights

Route · PHX → STL · 2020–2025 BTS data

Phoenix to St. Louis

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PHX to STL (Phoenix to St. Louis) ranks #911 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

81.3%
On-time
+2.3 pts
vs US avg
60 min
Delay when late
11,922
Flights
#911 of 4927
Corpus placement

Cancelled

0.5%

Best Month

Nov 2024 91%

Worst Month

Jul 2024 66%

Distance

1,262 mi

Carriers

19

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 207 51 0 0 WN,F9,AA,OO
Nov 2025 189 46 1 1 F9,AA,WN
Oct 2025 199 38 0 0 AA,OO,WN,F9
Sep 2025 159 27 2 0 WN,OO,AA
Aug 2025 164 35 1 0 AA,OO,WN
Jul 2025 166 36 1 2 AA,OO,WN
Jun 2025 171 34 0 0 AA,OO,WN
May 2025 208 34 1 2 AA,OO,WN
Apr 2025 210 33 0 0 OO,WN,AA
Mar 2025 193 29 1 1 AA,OO,WN
Feb 2025 180 18 0 0 AA,OO,WN
Jan 2025 193 22 9 2 AA,WN
Dec 2024 214 45 0 0 AA,OO,WN
Nov 2024 206 19 0 1 OO,MQ,WN,AA
Oct 2024 203 25 0 0 WN,AA
Sep 2024 176 21 1 0 WN,AA
Aug 2024 186 42 0 0 AA,F9,MQ,WN
Jul 2024 211 71 0 1 AA,F9,WN
Jun 2024 210 50 1 0 AA,F9,MQ,WN
May 2024 233 50 0 2 AA,F9,MQ,WN
Apr 2024 214 40 0 2 AA,F9,WN
Mar 2024 192 44 0 1 AA,WN
Feb 2024 180 27 0 0 AA,OO,WN
Jan 2024 199 50 7 1 AA,MQ,WN,OO

PHX–STL seasonal on-time pattern

Best: February (86.1%) · weakest: July (73.0%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 81.2%

Strongest calendar month

February

86.1% on-time · ~162 flights/mo

Busiest calendar month

March

~180 flights/mo avg

Weakest calendar month

July

73.0% on-time · ~163 flights/mo

Cancellation Rate

0.5%

25 of 4,663 flights

Diversion Rate

0.3%

16 of 4,663 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

PHX - Phoenix

Full on-time, delay-cause, and seasonal performance for Phoenix, AZ.

PHX on-time profile

STL - St. Louis

Full on-time, delay-cause, and seasonal performance for St. Louis, MO.

STL on-time profile

Compare the two airports

See PHX and STL side by side on delays, cancellations, and reliability.

Compare PHX vs STL

Origin-hub reliability standing

Mid-pack among PHX departures

From PHX, this corridor sits with 71 other 75–85% on-time routes out of 97 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: St. Louis · fleet on-time rank #2632 of 4927.

What the Data Says About PHX to STL

11,922 tracked flights put the PHX to STL pairing (Phoenix to St. Louis) at a 81.3% on-time rate, squarely in line with the wider network. Delays that do occur run 59.8 minutes on average. Across the 1,262-mile route and its 19 carriers, the trailing 24 months show 0.5% cancelled and 0.3% diverted (4,663 flights sampled).

The monthly split is wide on this route: Nov 2024 posted the strongest performance at 91% on-time, while Jul 2024 came in at just 66% - a 24-point swing worth factoring into travel timing.

On the multi-year calendar, PHX–STL peaks in February at 86.1% on-time while March carries the heaviest traffic (~180 flights per month) ; the softest month is July at 73.0%, a 13.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does PHX to STL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, PHX to STL ranks #911 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from PHX to STL? ▼
Flights from Phoenix to St. Louis have a 81.3% on-time rate based on 11,922 flights. The average delay is 59.8 minutes. The best recent month was Nov 2024 with 91% on-time.
What is the cancellation rate for PHX to STL? ▼
Over the last 24 months, 0.5% of flights on this route were cancelled (25 of 4,663 flights) and 0.3% were diverted.
How far is the flight from PHX to STL? ▼
The flight distance from Phoenix (PHX) to St. Louis (STL) is approximately 1,262 miles. This route is served by 19 carriers.
When is the best time to fly from PHX to STL? ▼
The best recent month for on-time performance was Nov 2024 (91% on-time). The worst was Jul 2024 (66% on-time). Consider booking during months with historically better performance.

Airports on this route

PHX Airport

Phoenix
STL Airport

St. Louis
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using PHX–STL data

PHX–STL is mid-pack at 81.3% on-time; month and carrier mix move more than the corridor headline.

  • Compare PHX and STL airport profiles: delay causes and top routes differ even on the same corridor. PHX airport
  • If your dates flex, February (86.1% on-time) beats July (73.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 81.3% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.