Route reliability record
SJU→DFW
San Juan to Dallas-Fort Worth
- Flights
- 975
- Period
- September 2025 to August 2026
- Distance
- 2,165 mi
- Carriers
- 3
This route lands a B, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 975 SJU to DFW flights, with a median arrival 13 minutes early.
Best time to fly SJU to DFW: a 8pm–5am departure, ideally on a Friday. Flights in that window arrived on time 89.4% of the time and Friday flights 86.6%, against 80.3% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
80.3%
Arrivals under 15 minutes late, of 939 completed flights
Avg delay
77 min
Across delayed arrivals only, not all flights
Cancelled
2.87%
National rate is 1.89%
Best carrier
American
82.7% on time across 704 flights
These figures cover 975 flights between September 2025 and August 2026. The median arrival is 13 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Which airline is most reliable on SJU to DFW
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlines | 704 | 82.7% | 80 min | 1.70% | B |
| Spirit Airlinesthin sample | 187 | 75.1% | 71 min | 4.28% | B− |
| Frontier Airlinesthin sample | 84 | 71.1% | 74 min | 9.52% | C− |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 19 points, against half a point between the best and worst carrier.
- 5am–8am351 flights84.6%
- 8am–11am—
- 11am–2pm29 flights—
- 2pm–5pm278 flights75.7%
- 5pm–8pm154 flights70.8%
- 8pm–5am163 flights89.4%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is the strongest at 89.4% on time. The full set of windows spans 19 points.
Explore
Filter SJU to DFW by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On SJU to DFW, the best departure window is 8pm–5am at 89.4% on time and the worst is 5pm–8pm at 70.8%, a wide gap of 18.6 points. All US flights leaving 8pm–5am ran 70.1%.
- 5–8am84.6%
- 8–11am—
- 11am–2pm—
- 2–5pm75.7%
- 5–8pm70.8%
- 8pm–5am89.4%
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 32 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
January is the weak month at 56.8% on time, against 88.5% in August. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. March was the busiest month here, with 113 flights.
Across the week, Friday is the strongest day at 86.6% on time and Saturday the weakest at 72.9%, a spread of 14 points.
Delay causes
Why this route gets delayed
Carrier accounts for 45% of the 14,000 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 40%Late-arriving aircraft
- 13%National Airspace System
- 1%Extreme weather
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 14,000 reported delay minutes here, that single category outweighs weather by 31 to one. The split is drawn from 14,218 reported delay minutes.
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 6,454 of the 14,000 delay minutes reported here.
Cancellations run at 2.87%, against 1.89% nationally. That is roughly one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here actually costs
5.9% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
At 2,165 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg is a different operation and performs like one: it runs 70.1% on time across 971 flights, 10 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 10 points of difference.
One caution: this is a thin sample. 975 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
Work out the risk of missing a connection in DFW after this flight
What to do with this
Booking this route
Put together: the delay figures matter less here than the 2.87% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 8pm–5am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 939 completed flights over 12 months sit behind that.
Common questions
SJU to DFW questions
How often is SJU to DFW delayed?
About one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 19.7% of the 975 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
How reliable is SJU to DFW compared with the rest of the country?
80.3% of flights arrive on time here against a national 77.3%, a difference of 3 points in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on SJU to DFW?
The 8pm–5am departure window is the strongest at 89.4% on time. The 5pm–8pm window is the weakest at 70.8%, 19 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are January delays on SJU to DFW?
January is the weakest month at 56.8% on time, compared with 88.5% in August. Across the year that is 32 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- DFW to SJU — the return legseparate record
- Luis Munoz Marin International (SJU) delay statistics
- Dallas/Fort Worth International (DFW) delay statistics
- American Airlines on SJU to DFW82.7%
- Spirit Airlines on SJU to DFW75.1%
- SJU to MCO, a related route78.0%
- ORD to DFW, a related route70.4%
- SJU to JFK, a related route77.8%
- American Airlines on-time record82.7%
- Spirit Airlines on-time record75.1%
- Frontier Airlines on-time record71.1%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. SJU to DFW and DFW to SJU are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.