ORD to SJU flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to Luis Munoz Marin International Airport · 2,072 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or SJU right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (ORD) to San Juan (SJU) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2.3% were cancelled, and 9% arrived an hour or more late.
- United Airlines was the most punctual airline here (79% on time); Spirit Airlines was the least (63%).
- Departures scheduled around 2pm did best (81% on time); around 6pm did worst (53%).
- Wednesday was the most reliable day to fly (79% on time) and Monday the least (68%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (35%).
Which airline is most on time from ORD to SJU?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 79% | 0.3% | 11 min | 4.7% | 665 |
| American Airlines | 73% | 1.6% | 18 min | 11.7% | 429 |
| Spirit Airlines | 63% | 7.6% | 29 min | 13.2% | 263 |
| Frontier Airlines | 61% | 7.3% | 88 min | 13.2% | 41 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12am61%41 flights
- 5am68%35 flights
- 8am78%632 flights
- 10am94%18 flights
- 12pm63%131 flights
- 2pm81%278 flights
- 3pm74%40 flights
- 5pm62%22 flights
- 6pm53%78 flights
- 8pm17%34 flights
- 10pm79%64 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday68%3.4% cancelled
- Tuesday77%2.1% cancelled
- Wednesday79%0.0% cancelled
- Thursday76%1.5% cancelled
- Friday74%1.4% cancelled
- Saturday73%4.9% cancelled
- Sunday69%2.5% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)35%
- Late-arriving aircraft29%
- Air traffic control & airport congestion25%
- Extreme weather10%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather53%
- Airline (crew, maintenance, cleaning, fueling)25%
- Air traffic control & airport congestion22%
- Security0%
ORD to SJU: common questions
- How often are ORD to SJU flights on time?
- 74% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Chicago to San Juan cancelled?
- 2.3% of scheduled flights were cancelled (32 of 1,398).
- How long are typical delays?
- Across all flights the average arrival delay was 19 min (early arrivals count as zero). Flights that were late arrived 67 min behind schedule on average, and 8.6% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 27 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SJU to ORD — 79% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ORD → SJU, nonstop flights by US airlines that report to the DOT. How we calculate this.