Route · SJU → IAD · 2020–2025 BTS data
San Juan to Washington
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SJU to IAD (San Juan to Washington) ranks #3674 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 86.4%
- On-time
- +7.4 pts
- vs US avg
- 67 min
- Delay when late
- 2,236
- Flights
- #3674 of 4927
- Corpus placement
Cancelled
0.6%
Best Month
Feb 2025 91%
Worst Month
Jul 2025 79%
Distance
1,571 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 77 | 13 | 0 | 0 | F9,UA |
| Nov 2025 | 73 | 9 | 0 | 0 | UA,F9 |
| Oct 2025 | 43 | 7 | 0 | 0 | UA,F9 |
| Aug 2025 | 50 | 14 | 0 | 0 | F9,UA |
| Jul 2025 | 53 | 11 | 0 | 1 | UA,F9 |
| Jun 2025 | 51 | 8 | 0 | 1 | UA,F9 |
| May 2025 | 38 | 6 | 0 | 0 | UA,F9 |
| Apr 2025 | 38 | 2 | 0 | 0 | UA |
| Mar 2025 | 61 | 11 | 1 | 0 | UA |
| Feb 2025 | 56 | 5 | 0 | 0 | UA |
| Jan 2025 | 62 | 12 | 1 | 0 | UA |
| Dec 2024 | 43 | 9 | 0 | 0 | UA |
| Nov 2024 | 30 | 3 | 0 | 0 | UA |
| Oct 2024 | 31 | 4 | 0 | 0 | UA |
| Aug 2024 | 37 | 9 | 0 | 1 | UA |
| Jul 2024 | 40 | 7 | 0 | 0 | UA |
| Jun 2024 | 39 | 8 | 1 | 0 | UA |
| May 2024 | 34 | 4 | 1 | 0 | UA |
| Apr 2024 | 38 | 5 | 0 | 0 | UA |
| Mar 2024 | 39 | 14 | 0 | 0 | UA |
| Feb 2024 | 33 | 5 | 0 | 0 | UA |
| Jan 2024 | 43 | 7 | 3 | 1 | UA |
| Dec 2023 | 48 | 6 | 0 | 0 | UA |
| Nov 2023 | 30 | 5 | 0 | 0 | UA |
SJU–IAD seasonal on-time pattern
Best: April (90.4%) · weakest: March (81.2%)
Strongest calendar month
April
90.4% on-time · ~37 flights/mo
Busiest calendar month
December
~58 flights/mo avg
Weakest calendar month
March
81.2% on-time · ~44 flights/mo
Cancellation Rate
0.6%
7 of 1,087 flights
Diversion Rate
0.4%
4 of 1,087 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SJU - San Juan
Full on-time, delay-cause, and seasonal performance for San Juan, PR.
SJU on-time profileIAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
IAD on-time profileCompare the two airports
See SJU and IAD side by side on delays, cancellations, and reliability.
Compare SJU vs IADOrigin-hub reliability standing
Among SJU's stronger departures
SJU → IAD posts a 86.4% on-time rate, landing in the ≥85% band with 1 of 21 BTS-tracked routes leaving San Juan. The same hub also shows 14 mid-band and 6 challenged departures · fleet-wide on-time rank #806 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to SJU–IAD.
Routes with a similar on-time rate
What the Data Says About SJU to IAD
San Juan to Washington (SJU to IAD) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 86.4% on-time rate across 2,236 flights, with delays that do happen averaging 66.8 minutes. The corridor runs roughly 1,571 miles and is served by 3 carriers. Over the most recent 24 months, 7 of 1,087 flights were cancelled (0.6%) and 4 diverted (0.4%).
Monthly performance varies moderately here: Feb 2025 was the strongest month at 91% on-time versus Jul 2025 at 79%, a 12-point difference.
On the multi-year calendar, SJU–IAD peaks in April at 90.4% on-time while December carries the heaviest traffic (~58 flights per month) ; the softest month is March at 81.2%, a 9.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does SJU to IAD rank among US routes by traffic? ▼
How often are flights delayed from SJU to IAD? ▼
What is the cancellation rate for SJU to IAD? ▼
How far is the flight from SJU to IAD? ▼
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Airports on this route
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 SJU–IAD data
SJU–IAD runs 7.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare SJU and IAD airport profiles: delay causes and top routes differ even on the same corridor. SJU airport
- If your dates flex, April (90.4% on-time) beats March (81.2%) on this corridor. Seasonal chart
- 4 other routes post a similar 86.4% 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.
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.