Route reliability record
ORD→SNA
Chicago to Santa Ana
- Flights
- 2,164
- Period
- September 2025 to August 2026
- Distance
- 1,726 mi
- Carriers
- 2
This route sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 2,164 ORD to SNA flights, of which United Airlines flew 1,041 at 75.9% on time.
Best time to fly ORD to SNA: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 82.3% of the time and Tuesday flights 83.6%, against 74.7% 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
74.7%
Arrivals under 15 minutes late, of 2,126 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
1.02%
National rate is 1.89%
Best carrier
United
75.9% on time across 1,041 flights
These figures cover 2,164 flights between September 2025 and August 2026. The median arrival is 3 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.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Which airline is most reliable on ORD to SNA
The two carriers here are closely matched: 2 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 1,041 | 75.9% | 49 min | 0.29% | B+ |
| American Airlines | 1,123 | 73.6% | 63 min | 1.69% | C |
No carrier stands out. United tops the table at 75.9%, 2 points clear of the bottom, which is inside the range this kind of sample moves year to year.
Flight by flight
Flights on ORD to SNA
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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.
Best ways to make this trip
The most reliable ways to fly Chicago to Santa Ana
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 3 of the top 5 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. ORD → LAXChicago to Los Angeles | United Airlines | 76.2% | 76.7% | 0.64% | 5am–8am, Tue | UA 2361 07:00 |
| 2. ORD → SNAChicago to Santa Ana | United Airlines | 75.7% | 75.9% | 0.29% | 8pm–5am, Tue | — |
| 3. ORD → SNAChicago to Santa Ana | American Airlines | 72.4% | 73.6% | 1.69% | 5am–8am, Tue | AA 1179 18:54 |
| 4. MDW → LAXChicago to Los Angeles | Southwest Airlines | 67.7% | 68.3% | 0.93% | 5am–8am, Tue | — |
| 5. ORD → LAXChicago to Los Angeles | American Airlines | 66.5% | 67.7% | 1.78% | 5am–8am, Tue | AA 1979 10:30 |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
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 13 points, against 2 points between the best and worst carrier.
- 5am–8am63 flights82.3%
- 8am–11am745 flights80.0%
- 11am–2pm320 flights69.3%
- 2pm–5pm352 flights69.6%
- 5pm–8pm508 flights71.1%
- 8pm–5am176 flights79.8%
Scale runs 60% to 90%.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 69.3% on time against 82.3% for 5am–8am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8am–11am window is the busiest, with 745 flights scheduled in it.
Explore
Filter ORD to SNA 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 ORD to SNA, the best departure window is 5am–8am at 82.3% on time and the worst is 11am–2pm at 69.3%, a wide gap of 13.0 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am82.3%
- 8–11am80.0%
- 11am–2pm69.3%
- 2–5pm69.6%
- 5–8pm71.1%
- 8pm–5am79.8%
best all US flightsScale 60% to 95%.
Across the year
When delays peak on this route
This route's year swings by 14 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.
August is the worst month at 69.8% on time, 14 points below May, the best at 83.7%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. October was the busiest month here, with 208 flights.
Across the week, Tuesday is the strongest day at 83.6% on time and Monday the weakest at 68.6%, a spread of 15 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 43% of the 30,000 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Late-arriving aircraft
- 31%Carrier
- 21%National Airspace System
- 4%Extreme weather
- 0%Security
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 30,000 reported delay minutes here, that single category outweighs weather by 10 to one. The split is drawn from 30,354 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 82.3% on time here.
Cancellations sit at 1.02% against a national 1.89%, which is ordinary. Diversions add another 0.74%.
Connections and stage length
What a delay here actually costs
7.0% 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 about an hour, which a normal layover absorbs.
At 1,726 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 runs 76.8% on time across 2,164 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 2,164 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in SNA after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. May runs 83.7% on time and August 69.8%, a swing of 14 points. If the dates move at all, move them out of August before you think about anything else. 2,126 completed flights over 12 months sit behind that.
Common questions
ORD to SNA questions
How often is ORD to SNA delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 25.3% of the 2,164 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on ORD to SNA?
United Airlines leads at 75.9% on time across 1,041 flights. American Airlines is at the other end on 73.6%, a gap of 2 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on ORD to SNA?
The 5am–8am departure window is the strongest at 82.3% on time. The 11am–2pm window is the weakest at 69.3%, 13 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 August delays on ORD to SNA?
August is the weakest month at 69.8% on time, compared with 83.7% in May. Across the year that is 14 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
- SNA to ORD — the return legseparate record
- Chicago O'Hare International (ORD) delay statistics
- John Wayne Airport (SNA) delay statistics
- United Airlines on ORD to SNA75.9%
- American Airlines on ORD to SNA73.6%
- ORD to LGA, a related route66.6%
- SFO to SNA, a related route77.4%
- ORD to BOS, a related route66.6%
- United Airlines on-time record75.9%
- American Airlines on-time record73.6%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. ORD to SNA and SNA to ORD are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Embed ORD to SNA’s on-time badge on your site
Paste this into a web page. The badge shows the current on-time rate, cancellation rate and grade, and updates every month. Preview it, or build a badge for another route or airport.
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.