PlainFlights

Route · IAD → PHX · 2020–2025 BTS data

Washington to Phoenix

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAD to PHX (Washington to Phoenix) ranks #2854 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

83%
On-time
+4 pts
vs US avg
68 min
Delay when late
4,098
Flights
#2854 of 4927
Corpus placement

Cancelled

1.0%

Best Month

Oct 2024 95%

Worst Month

Jul 2025 60%

Distance

1,956 mi

Carriers

4

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 108 19 0 0 WN,UA
Nov 2025 109 27 2 0 UA,WN
Oct 2025 97 24 0 0 UA,WN
Sep 2025 87 21 0 1 UA,WN
Aug 2025 88 14 0 1 WN,UA
Jul 2025 92 37 2 0 UA,WN
Jun 2025 90 25 0 0 UA,WN
May 2025 113 24 0 0 UA,WN
Apr 2025 120 25 0 0 UA,WN
Mar 2025 124 12 0 1 UA,WN
Feb 2025 94 13 0 0 UA,WN
Jan 2025 87 22 2 0 UA,WN
Dec 2024 124 15 0 0 UA,WN
Nov 2024 117 12 1 1 UA,WN
Oct 2024 98 5 0 0 UA,WN
Sep 2024 90 12 0 0 WN,UA
Aug 2024 93 20 2 0 WN,UA
Jul 2024 93 32 2 1 UA,WN
Jun 2024 90 29 0 0 UA,WN
May 2024 106 17 0 0 UA,WN
Apr 2024 105 14 0 0 UA,WN
Mar 2024 87 9 0 0 UA
Feb 2024 44 2 0 0 UA
Jan 2024 39 7 13 0 UA

IAD–PHX seasonal on-time pattern

Best: March (89.9%) · weakest: July (61.2%)

50%60%70%80%90%100% JanFebMarAprMayJunJulAugSepOctNovDec 86.7%

Strongest calendar month

March

89.9% on-time · ~71 flights/mo

Busiest calendar month

April

~79 flights/mo avg

Weakest calendar month

July

61.2% on-time · ~56 flights/mo

Cancellation Rate

1.0%

24 of 2,295 flights

Diversion Rate

0.2%

5 of 2,295 flights

Explore origin & destination

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

IAD - Washington

Full on-time, delay-cause, and seasonal performance for Washington, DC.

IAD 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 IAD and PHX side by side on delays, cancellations, and reliability.

Compare IAD vs PHX

Origin-hub reliability standing

Mid-pack among IAD departures

From IAD, this corridor sits with 42 other 75–85% on-time routes out of 58 tracked departures, not the hub's reliability leaders (14 at ≥85%) and not the softest ( 2 below 75%). Destination: Phoenix · fleet on-time rank #1942 of 4927.

What the Data Says About IAD to PHX

Bureau of Transportation Statistics records show Washington to Phoenix (IAD to PHX) running a 83% on-time rate over 4,098 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 68.4 minutes. The 1,956-mile corridor is served by 4 carriers, and over the last 24 months 1.0% of 2,295 flights were cancelled, 0.2% diverted.

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 95% on-time, while Jul 2025 came in at just 60% - a 35-point swing worth factoring into travel timing.

On the multi-year calendar, IAD–PHX peaks in March at 89.9% on-time while April carries the heaviest traffic (~79 flights per month) ; the softest month is July at 61.2%, a 28.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does IAD to PHX rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, IAD to PHX ranks #2854 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 IAD to PHX? ▼
Flights from Washington to Phoenix have a 83% on-time rate based on 4,098 flights. The average delay is 68.4 minutes. The best recent month was Oct 2024 with 95% on-time.
What is the cancellation rate for IAD to PHX? ▼
Over the last 24 months, 1.0% of flights on this route were cancelled (24 of 2,295 flights) and 0.2% were diverted.
How far is the flight from IAD to PHX? ▼
The flight distance from Washington (IAD) to Phoenix (PHX) is approximately 1,956 miles. This route is served by 4 carriers.
When is the best time to fly from IAD to PHX? ▼
The best recent month for on-time performance was Oct 2024 (95% on-time). The worst was Jul 2025 (60% on-time). Consider booking during months with historically better performance.

Airports on this route

IAD Airport

Washington
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 IAD–PHX data

IAD–PHX runs 4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare IAD and PHX airport profiles: delay causes and top routes differ even on the same corridor. IAD airport
  • If your dates flex, March (89.9% on-time) beats July (61.2%) on this corridor. Seasonal chart
  • 4 other routes post a similar 83% 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.