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Route · PDX → DEN · 2020–2025 BTS data

Portland to Denver

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PDX to DEN (Portland to Denver) ranks #251 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

84.1%
On-time
+5.1 pts
vs US avg
64 min
Delay when late
23,123
Flights
#251 of 4927
Corpus placement

Cancelled

0.8%

Best Month

Mar 2025 92%

Worst Month

Jul 2025 65%

Distance

991 mi

Carriers

27

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 346 81 1 1 WN,F9,AS,UA,OO
Nov 2025 344 33 7 1 UA,F9,AS,WN
Oct 2025 395 56 0 0 AS,OO,UA,WN,F9
Sep 2025 395 87 1 1 UA,WN,F9,AS
Aug 2025 436 106 2 4 WN,F9,UA,AS
Jul 2025 461 163 6 8 AS,UA,WN,F9
Jun 2025 443 129 2 8 AS,UA,WN,F9
May 2025 402 99 3 2 AS,UA,WN,F9
Apr 2025 344 72 1 1 F9,UA,WN,AS
Mar 2025 327 27 1 1 AS,UA,WN,F9
Feb 2025 279 32 0 0 AS,UA,WN,F9
Jan 2025 310 48 2 2 AS,UA,WN,F9
Dec 2024 350 45 1 0 AS,F9,UA,WN
Nov 2024 366 40 3 0 UA,WN,AS,F9
Oct 2024 373 36 1 0 UA,AS,WN,F9
Sep 2024 413 48 0 0 WN,UA,AS,F9
Aug 2024 437 78 3 2 AS,F9,WN,UA
Jul 2024 464 77 7 1 AS,F9,UA,WN
Jun 2024 431 101 5 2 AS,F9,OO,UA,WN
May 2024 378 74 6 0 AS,F9,OO,UA,WN
Apr 2024 346 51 1 0 AS,F9,UA,WN
Mar 2024 332 43 3 0 AS,F9,UA,WN
Feb 2024 279 36 1 2 AS,F9,UA,WN
Jan 2024 299 53 18 0 AS,F9,WN,UA

PDX–DEN seasonal on-time pattern

Best: November (90.0%) · weakest: July (76.8%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 82.3%

Strongest calendar month

November

90.0% on-time · ~317 flights/mo

Busiest calendar month

August

~378 flights/mo avg

Weakest calendar month

July

76.8% on-time · ~374 flights/mo

Cancellation Rate

0.8%

75 of 8,950 flights

Diversion Rate

0.4%

36 of 8,950 flights

Explore origin & destination

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

PDX - Portland

Full on-time, delay-cause, and seasonal performance for Portland, OR.

PDX on-time profile

DEN - Denver

Full on-time, delay-cause, and seasonal performance for Denver, CO.

DEN on-time profile

Compare the two airports

See PDX and DEN side by side on delays, cancellations, and reliability.

Compare PDX vs DEN

Origin-hub reliability standing

Mid-pack among PDX departures

From PDX, this corridor sits with 17 other 75–85% on-time routes out of 44 tracked departures, not the hub's reliability leaders (26 at ≥85%) and not the softest ( 1 below 75%). Destination: Denver · fleet on-time rank #1546 of 4927.

What the Data Says About PDX to DEN

Bureau of Transportation Statistics records show Portland to Denver (PDX to DEN) running a 84.1% on-time rate over 23,123 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 63.8 minutes. The 991-mile corridor is served by 27 carriers, and over the last 24 months 0.8% of 8,950 flights were cancelled, 0.4% diverted.

The monthly split is wide on this route: Mar 2025 posted the strongest performance at 92% on-time, while Jul 2025 came in at just 65% - a 27-point swing worth factoring into travel timing.

On the multi-year calendar, PDX–DEN peaks in November at 90.0% on-time while August carries the heaviest traffic (~378 flights per month) ; the softest month is July at 76.8%, a 13.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does PDX to DEN rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, PDX to DEN ranks #251 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 PDX to DEN? ▼
Flights from Portland to Denver have a 84.1% on-time rate based on 23,123 flights. The average delay is 63.8 minutes. The best recent month was Mar 2025 with 92% on-time.
What is the cancellation rate for PDX to DEN? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (75 of 8,950 flights) and 0.4% were diverted.
How far is the flight from PDX to DEN? ▼
The flight distance from Portland (PDX) to Denver (DEN) is approximately 991 miles. This route is served by 27 carriers.
When is the best time to fly from PDX to DEN? ▼
The best recent month for on-time performance was Mar 2025 (92% on-time). The worst was Jul 2025 (65% on-time). Consider booking during months with historically better performance.

Airports on this route

PDX Airport

Portland
DEN Airport

Denver
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 PDX–DEN data

PDX–DEN runs 5.1 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare PDX and DEN airport profiles: delay causes and top routes differ even on the same corridor. PDX airport
  • If your dates flex, November (90.0% on-time) beats July (76.8%) on this corridor. Seasonal chart
  • 4 other routes post a similar 84.1% 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.