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Route · ONT → PHX · 2020–2025 BTS data

Ontario to Phoenix

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ONT to PHX (Ontario to Phoenix) ranks #499 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

85%
On-time
+6 pts
vs US avg
73 min
Delay when late
16,845
Flights
#499 of 4927
Corpus placement

Cancelled

0.5%

Best Month

Feb 2025 93%

Worst Month

Nov 2025 74%

Distance

325 mi

Carriers

39

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 282 56 0 0 WN,AA
Nov 2025 272 70 7 0 AA,WN
Oct 2025 258 60 0 0 AA,OO,WN
Sep 2025 227 32 5 0 WN,OO,AA
Aug 2025 237 38 0 0 AA,OO,WN
Jul 2025 263 47 2 0 AA,OO,WN
Jun 2025 260 50 0 0 AA,OO,WN,MQ
May 2025 294 34 0 0 AA,OO,WN,MQ
Apr 2025 289 35 1 0 MQ,OO,WN,AA
Mar 2025 291 43 1 0 AA,WN,MQ
Feb 2025 240 16 0 0 AA,OO,WN,MQ
Jan 2025 254 28 3 0 AA,OO,WN,MQ
Dec 2024 282 26 0 0 AA,MQ,WN
Nov 2024 273 27 0 0 MQ,WN,OO,AA
Oct 2024 292 29 1 0 OO,WN,AA
Sep 2024 262 31 0 0 WN,OO,AA,F9
Aug 2024 290 32 2 0 AA,F9,WN,OO
Jul 2024 289 62 5 1 AA,F9,OO,WN
Jun 2024 276 52 1 0 AA,F9,OO,WN
May 2024 297 68 3 1 AA,F9,OO,WN
Apr 2024 277 42 0 0 AA,F9,WN
Mar 2024 279 48 1 1 AA,F9,WN
Feb 2024 242 29 0 0 AA,F9,OO,WN
Jan 2024 254 39 2 0 AA,F9,MQ,WN,OO

ONT–PHX seasonal on-time pattern

Best: February (88.5%) · weakest: July (79.8%)

78%80%82%84%86%88%90% JanFebMarAprMayJunJulAugSepOctNovDec 85%

Strongest calendar month

February

88.5% on-time · ~225 flights/mo

Busiest calendar month

March

~259 flights/mo avg

Weakest calendar month

July

79.8% on-time · ~240 flights/mo

Cancellation Rate

0.5%

34 of 6,480 flights

Diversion Rate

0.0%

3 of 6,480 flights

Explore origin & destination

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

ONT - Ontario

Full on-time, delay-cause, and seasonal performance for Ontario, CA.

ONT on-time profile

PHX - Phoenix

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

PHX on-time profile

Compare the two airports

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

Compare ONT vs PHX

Origin-hub reliability standing

Among ONT's stronger departures

ONT → PHX posts a 85% on-time rate, landing in the ≥85% band with 10 of 21 BTS-tracked routes leaving Ontario. The same hub also shows 9 mid-band and 2 challenged departures · fleet-wide on-time rank #1225 of 4927 (highest on-time = #1).

What the Data Says About ONT to PHX

Ontario to Phoenix (ONT to PHX) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85% on-time rate across 16,845 flights, with delays that do happen averaging 72.7 minutes. The corridor runs roughly 325 miles and is served by 39 carriers. Over the most recent 24 months, 34 of 6,480 flights were cancelled (0.5%) and 3 diverted (0.0%).

The monthly split is wide on this route: Feb 2025 posted the strongest performance at 93% on-time, while Nov 2025 came in at just 74% - a 19-point swing worth factoring into travel timing.

On the multi-year calendar, ONT–PHX peaks in February at 88.5% on-time while March carries the heaviest traffic (~259 flights per month) ; the softest month is July at 79.8%, a 8.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does ONT to PHX rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, ONT to PHX ranks #499 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 ONT to PHX? ▼
Flights from Ontario to Phoenix have a 85% on-time rate based on 16,845 flights. The average delay is 72.7 minutes. The best recent month was Feb 2025 with 93% on-time.
What is the cancellation rate for ONT to PHX? ▼
Over the last 24 months, 0.5% of flights on this route were cancelled (34 of 6,480 flights) and 0.0% were diverted.
How far is the flight from ONT to PHX? ▼
The flight distance from Ontario (ONT) to Phoenix (PHX) is approximately 325 miles. This route is served by 39 carriers.
When is the best time to fly from ONT to PHX? ▼
The best recent month for on-time performance was Feb 2025 (93% on-time). The worst was Nov 2025 (74% on-time). Consider booking during months with historically better performance.

Airports on this route

ONT Airport

Ontario
PHX Airport

Phoenix
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 ONT–PHX data

ONT–PHX runs 6 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare ONT and PHX airport profiles: delay causes and top routes differ even on the same corridor. ONT airport
  • If your dates flex, February (88.5% on-time) beats July (79.8%) on this corridor. Seasonal chart
  • 4 other routes post a similar 85% 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.