Reliable Flight Search
BetaThe insider way to pick a flight: on-time records, the odds each connection is made, legroom and the age of the planes that actually fly the route. Things airline sites and the big booking sites don’t show you. US airlines and airports.
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
Lowest nonstop fare seen in the next two months: $97 (American 1979 on 2026-11-16). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Best trips
16 nonstop, 30 with 1 connection · ranked by overall best · published legroom for 5 of 46
Top pick#1 · Nonstop · 4h 40m
7:00 AM → 9:40 AM
85
score
87%
arrive on time
88% on time · 0.9% cancel7:00 AM ORD → 9:40 AM LAX4h 40m
United 2361
Airbus A321neo · 1–3 yrs oldLegroom: not published for this aircraft and cabin yetFind United 2361 fares Opens this date on Aviasales#2 · Nonstop · 4h 40m
8:40 AM → 11:20 AM
84
score
87%
arrive on time
87% on time · 0.4% cancel8:40 AM ORD → 11:20 AM LAX4h 40m
United 530
Airbus A321neo · 1–24 yrs oldLegroom: not published for this aircraft and cabin yetFind United 530 fares Opens this date on Aviasales#3 · Nonstop · 4h 44m
10:05 AM → 12:49 PM
81
score
86%
arrive on time
87% on time · 0.6% cancel10:05 AM ORD → 12:49 PM LAX4h 44m
United 651
Airbus A321neo · 1–24 yrs oldLegroom: not published for this aircraft and cabin yetFind United 651 fares Opens this date on Aviasales#4 · Nonstop · 4h 43m
1:18 PM → 4:01 PM
71
score
82%
arrive on time
82% on time · 0.4% cancel1:18 PM ORD → 4:01 PM LAX4h 43m
United 1363
Airbus A321neo or Boeing 777-200 · 1–30 yrs oldLegroom: not published for this aircraft and cabin yetFind United 1363 fares Opens this date on Aviasales#5 · Nonstop · 4h 27m
6:00 AM → 8:27 AM
69
score
83%
arrive on time
84% on time · 0.6% cancel6:00 AM ORD → 8:27 AM LAX4h 27m
United 2373
Boeing 737-900ER · 11–14 yrs oldLegroom: not published for this aircraft and cabin yetFind United 2373 fares Opens this date on Aviasales#6 · Nonstop · 4h 37m
6:00 AM → 8:37 AM
69
score
84%
arrive on time
86% on time · 2.6% cancel6:00 AM ORD → 8:37 AM LAX4h 37m
American 607 · also flew as 1261
Boeing 737-800 · 10–26 yrs oldLegroom 30–31 in · 16.3–18.7 in wide · Main CabinFind American 607 fares Opens this date on Aviasales#7 · Nonstop · 4h 33m
10:53 AM → 1:26 PM
69
score
80%
arrive on time
81% on time · 0.4% cancel10:53 AM ORD → 1:26 PM LAX4h 33m
United 1044 · also flew as 2488
Airbus A321neo · 0–25 yrs oldLegroom: not published for this aircraft and cabin yetFind United 1044 fares Opens this date on Aviasales#8 · Nonstop · 4h 43m
11:18 AM → 2:01 PM
67
score
80%
arrive on time
81% on time · 0.6% cancel11:18 AM ORD → 2:01 PM LAX4h 43m
United 1170
Airbus A321neo · 1–3 yrs oldLegroom: not published for this aircraft and cabin yetFind United 1170 fares Opens this date on Aviasales#9 · Nonstop · 4h 43m
2:35 PM → 5:27 PM
65
score
80%
arrive on time
80% on time · 0.4% cancel2:35 PM ORD → 5:27 PM LAX4h 43m
United 374
Airbus A321neo · 1–2 yrs oldLegroom: not published for this aircraft and cabin yetFind United 374 fares Opens this date on Aviasales#10 · Nonstop · 4h 29m
6:51 AM → 9:20 AM
61
score
80%
arrive on time
81% on time · 1.6% cancel6:51 AM ORD → 9:20 AM LAX4h 29m
American 1628 · also flew as 3224
Airbus A321 · 7–25 yrs oldLegroom 30–31 in · 16.3–18.7 in wide · Main Cabin · covers 94% of recent planesFind American 1628 fares Opens this date on Aviasales
Aircraft and ages come from the planes each flight number actually flew in the last 3 months of data (FAA registry build years); airlines can swap planes. Legroom is the seat pitch the airline or a seat-map source publishes for that aircraft and cabin; we never estimate it, and seat maps change, so check the airline’s seat map when you book.
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%
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%
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