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Route · DEN → SJU · 2020–2025 BTS data

Denver to San Juan

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), DEN to SJU (Denver to San Juan) ranks #4825 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

75.3%
On-time
-3.7 pts
vs US avg
48 min
Delay when late
582
Flights
#4825 of 4927
Corpus placement

Cancelled

0.3%

Best Month

N/A

Worst Month

N/A

Distance

2,733 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 31 6 0 0 UA
Nov 2025 30 2 0 1 UA
Oct 2025 31 4 0 0 UA
Jul 2025 31 14 0 1 UA
Jun 2025 30 14 0 2 UA
May 2025 31 11 0 0 UA
Apr 2025 30 4 0 0 UA
Mar 2025 31 7 0 0 UA
Jan 2025 31 8 0 0 UA
Dec 2024 31 8 0 0 UA
Nov 2024 30 9 0 0 UA
Jul 2024 31 11 1 0 UA
Jun 2024 30 11 0 0 UA
May 2024 31 5 0 0 UA
Apr 2024 30 6 0 0 UA
Mar 2024 31 11 0 0 UA
Jan 2024 31 4 1 0 UA
Dec 2023 31 5 0 0 UA
Nov 2023 30 4 0 0 UA

DEN–SJU seasonal on-time pattern

Best: October (87.1%) · weakest: June (58.3%)

50%60%70%80%90% JanMarAprMayJunJulOctNovDec 79.6%

Strongest calendar month

October

87.1% on-time · ~31 flights/mo

Busiest calendar month

January

~31 flights/mo avg

Weakest calendar month

June

58.3% on-time · ~30 flights/mo

Cancellation Rate

0.3%

2 of 582 flights

Diversion Rate

0.7%

4 of 582 flights

Explore origin & destination

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

DEN - Denver

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

DEN on-time profile

SJU - San Juan

Full on-time, delay-cause, and seasonal performance for San Juan, PR.

SJU on-time profile

Compare the two airports

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

Compare DEN vs SJU

Origin-hub reliability standing

Mid-pack among DEN departures

From DEN, this corridor sits with 133 other 75–85% on-time routes out of 168 tracked departures, not the hub's reliability leaders (8 at ≥85%) and not the softest ( 27 below 75%). Destination: San Juan · fleet on-time rank #4420 of 4927.

What the Data Says About DEN to SJU

The Denver to San Juan corridor (DEN to SJU) posts a 75.3% on-time rate on the lower edge of the average band, based on 582 tracked flights. Late flights run 47.8 minutes behind on average. 1 carrier cover the 2,733-mile route; over the last 24 months, 2 of 582 flights were cancelled (0.3%) and 0.7% diverted.

Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.

On the multi-year calendar, DEN–SJU peaks in October at 87.1% on-time while January carries the heaviest traffic (~31 flights per month) ; the softest month is June at 58.3%, a 28.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does DEN to SJU rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, DEN to SJU ranks #4825 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 DEN to SJU? ▼
Flights from Denver to San Juan have a 75.3% on-time rate based on 582 flights. The average delay is 47.8 minutes.
What is the cancellation rate for DEN to SJU? ▼
Over the last 24 months, 0.3% of flights on this route were cancelled (2 of 582 flights) and 0.7% were diverted.
How far is the flight from DEN to SJU? ▼
The flight distance from Denver (DEN) to San Juan (SJU) is approximately 2,733 miles. This route is served by 1 carrier.

Airports on this route

DEN Airport

Denver
SJU Airport

San Juan
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 DEN–SJU data

DEN–SJU is mid-pack at 75.3% on-time; month and carrier mix move more than the corridor headline.

  • Compare DEN and SJU airport profiles: delay causes and top routes differ even on the same corridor. DEN airport
  • If your dates flex, October (87.1% on-time) beats June (58.3%) on this corridor. Seasonal chart
  • 4 other routes post a similar 75.3% 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.