Route on-time record

ORD to LAX: most on-time flights and the best time to fly

Chicago (Chicago O'Hare International Airport) to Los Angeles (Los Angeles International Airport). 6,981 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 1.5% were cancelled. The most reliable flight number was United 530 at 8:40 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

ORD → LAX

Chicago to Los Angeles: 6,981 nonstop flights a year

On time (12 months)

74%

Cancelled

1.5%

avg delay 20 min

Best time to leave

Before 9 AM

84% on time vs 61% 6 to 9 PM

Most reliable airline

United

77% chance on time

Check ORD to LAX fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

#1 · United 530
8:40 AM → 11:20 AM4h 40m nonstop
Local times, typical schedule. Last flown 2026-05-20.
87%
chance on time
On time (history)
90%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 90% of the time (98 flights, Jun 2025 to May 2026).
- Never cancelled in 98 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 61%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Moderate track record · 98 flights
Find United 530 fares Opens this date on Aviasales
#2 · United 2361
7:00 AM → 9:40 AM4h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
On time (history)
88%
Cancelled
1.1%
Avg arrival delay
8 min
- Arrived on time 88% of the time (275 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 61%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Strong track record · 275 flights
Find United 2361 fares Opens this date on Aviasales
#3 · United 651
10:05 AM → 12:49 PM4h 44m nonstop
Local times, typical schedule. Last flown 2026-05-20.
86%
chance on time
On time (history)
95%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 95% of the time (21 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find United 651 fares Opens this date on Aviasales
#4 · American 607
6:00 AM → 8:37 AM4h 37m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as American 1261; its record covers all of them.
84%
chance on time
On time (history)
87%
Cancelled
2.9%
Avg arrival delay
11 min
- Arrived on time 87% of the time (232 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 61%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Strong track record · 232 flights
Find American 607 fares Opens this date on Aviasales
#5 · United 2373
6:00 AM → 8:27 AM4h 27m nonstop
Local times, typical schedule. Last flown 2026-05-30.
83%
chance on time
On time (history)
75%
Cancelled
0.0%
Avg arrival delay
23 min
- Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 61%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- 69% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 8 flights
Find United 2373 fares Opens this date on Aviasales
#6 · United 2814
8:51 AM → 11:29 AM4h 38m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 61%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find United 2814 fares Opens this date on Aviasales
#7 · United 1363
1:18 PM → 4:01 PM4h 43m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
On time (history)
82%
Cancelled
0.3%
Avg arrival delay
18 min
- Arrived on time 82% of the time (327 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Lands inside LAX's trouble window: 53% of its 15 ground stops and delay programs started between 4 PM and 10 PM.
Strong track record · 327 flights
Find United 1363 fares Opens this date on Aviasales
#8 · United 1044
10:53 AM → 1:26 PM4h 33m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 2488; its record covers all of them.
80%
chance on time
On time (history)
80%
Cancelled
0.3%
Avg arrival delay
12 min
- Arrived on time 80% of the time (399 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Strong track record · 399 flights
Find United 1044 fares Opens this date on Aviasales
#9 · United 1170
11:18 AM → 2:01 PM4h 43m nonstop
Local times, typical schedule. Last flown 2026-05-20.
80%
chance on time
On time (history)
90%
Cancelled
0.0%
Avg arrival delay
4 min
- Arrived on time 90% of the time (21 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find United 1170 fares Opens this date on Aviasales
#10 · American 1628
6:51 AM → 9:20 AM4h 29m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as American 3224; its record covers all of them.
80%
chance on time
On time (history)
80%
Cancelled
0.9%
Avg arrival delay
17 min
- Arrived on time 80% of the time (114 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 61%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Moderate track record · 114 flights
Find American 1628 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

United Airlines77%
3,396 flights · 78% on time as flown · 0.7% cancel
Spirit Airlines72%
295 flights · 74% on time as flown · 2.3% cancel
American Airlines68%
3,040 flights · 70% on time as flown · 2.1% cancel
Frontier Airlines66%
250 flights · 66% on time as flown · 3.3% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM84%
1,718 flights · avg delay 12 min
9 AM to noon78%
1,189 flights · avg delay 16 min
Noon to 3 PM80%
917 flights · avg delay 15 min
3 to 6 PM70%
1,022 flights · avg delay 25 min
6 to 9 PM61%
1,603 flights · avg delay 31 min
After 9 PM64%
532 flights · avg delay 27 min

Best day: Wednesday (80%). Worst: Sunday (75%).

Smarter routing

Nearby airports that run more on time

MDW → BUR 77% chance on time
Chicago Midway International Airport to Hollywood Burbank/Bob Hope Airport · 322 flights a year · 33 mi from your airports · yours: 72%
Rank flights Fares
ORD → SNA 75% chance on time
Chicago O'Hare International Airport to John Wayne Orange County International Airport · 2,238 flights a year · 36 mi from your airports · yours: 72%
Rank flights Fares

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

What delays this route

Late-arriving aircraft42%
Airline (crew, maintenance, boarding)34%
Air traffic control and airport volume17%
Severe weather7%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

ORD to LAX questions

What time of day is best to fly ORD to LAX?: Before 9 AM: 84% of flights arrived on time, against 61% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from ORD to LAX?: United, with a season-adjusted 77% chance of operating and arriving on time over 3,396 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on ORD to LAX?: July (69% on time); the best was November (83%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?: No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from ORD

Live status: FAA delays and ground stops

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