Route on-time record

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

Chicago (Chicago O'Hare International Airport) to Salt Lake City (Salt Lake City International Airport). 3,174 nonstop flights in Jun 2025 to May 2026, 68% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was United 2138 at 1:00 PM.

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

ORD → SLC

Chicago to Salt Lake City: 3,174 nonstop flights a year

On time (12 months)

68%

Cancelled

1.0%

avg delay 26 min

Best time to leave

Before 9 AM

79% on time vs 57% 6 to 9 PM

Most reliable airline

United

70% chance on time

Check ORD to SLC fares

Lowest nonstop fare seen in the next two months: $180 (American 3258 on 2026-10-23). 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 2138
1:00 PM → 3:47 PM3h 47m nonstop
Local times, typical schedule. Last flown 2026-03-28.
82%
chance on time
On time (history)
93%
Cancelled
4.4%
Avg arrival delay
5 min
- Arrived on time 93% of the time (43 flights, Jun 2025 to May 2026).
- Cancelled 4.4% of the time (2 of 45).
- 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 (43 flights), so its score leans on the airline's record at this hour.
Limited track record · 43 flights
Find United 2138 fares Opens this date on Aviasales
#2 · United 1972
8:55 AM → 11:43 AM3h 48m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
On time (history)
83%
Cancelled
2.3%
Avg arrival delay
11 min
- Arrived on time 83% of the time (86 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 79% on time; 6 to 9 PM: 57%).
- 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 · 86 flights
Find United 1972 fares Opens this date on Aviasales
#3 · Delta 2231
7:20 AM → 10:12 AM3h 37m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
On time (history)
77%
Cancelled
1.1%
Avg arrival delay
25 min
- Arrived on time 77% of the time (361 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 79% on time; 6 to 9 PM: 57%).
- 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 · 361 flights
Find Delta 2231 fares Opens this date on Aviasales
#4 · United 1955
12:40 PM → 3:17 PM3h 37m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 473; its record covers all of them.
75%
chance on time
On time (history)
77%
Cancelled
0.0%
Avg arrival delay
26 min
- Arrived on time 77% of the time (43 flights, Jun 2025 to May 2026).
- Never cancelled in 43 scheduled flights.
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- 82% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 43 flights
Find United 1955 fares Opens this date on Aviasales
#5 · Delta 2247
1:19 PM → 4:05 PM3h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
On time (history)
71%
Cancelled
0.0%
Avg arrival delay
23 min
- Arrived on time 71% of the time (115 flights, Jun 2025 to May 2026).
- Never cancelled in 117 scheduled flights.
- 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 · 115 flights
Find Delta 2247 fares Opens this date on Aviasales
#6 · American 3187
1:24 PM → 4:02 PM3h 38m nonstop
Local times, typical schedule. Last flown 2026-04-06.
70%
chance on time
On time (history)
76%
Cancelled
3.3%
Avg arrival delay
20 min
- Arrived on time 76% of the time (29 flights, Jun 2025 to May 2026).
- Cancelled 3.3% of the time (1 of 30).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- 56% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 29 flights
Find American 3187 fares Opens this date on Aviasales
#7 · American 2862
9:57 AM → 12:37 PM3h 40m nonstop
Local times, typical schedule. Last flown 2026-05-20.
69%
chance on time
On time (history)
73%
Cancelled
0.0%
Avg arrival delay
12 min
- Arrived on time 73% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- 65% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 44 flights
Find American 2862 fares Opens this date on Aviasales
#8 · SkyWest 5953 · sold as United Express, Delta Connection, American Eagle or Alaska
3:45 PM → 6:38 PM3h 53m nonstop
Local times, typical schedule. Last flown 2026-05-31.
69%
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).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 3:45 PM flight fares Opens this date on Aviasales
#9 · Delta 2242
2:09 PM → 4:40 PM3h 31m nonstop
Local times, typical schedule. Last flown 2026-05-06.
68%
chance on time
On time (history)
63%
Cancelled
0.0%
Avg arrival delay
42 min
- Arrived on time 63% of the time (24 flights, Jun 2025 to May 2026).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find Delta 2242 fares Opens this date on Aviasales
#10 · United 704
10:52 AM → 1:41 PM3h 49m nonstop
Local times, typical schedule. Last flown 2026-03-28.
68%
chance on time
On time (history)
67%
Cancelled
0.0%
Avg arrival delay
13 min
- Arrived on time 67% of the time (76 flights, Jun 2025 to May 2026).
- Never cancelled in 76 scheduled flights.
- 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 · 76 flights
Find United 704 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

United Airlines70%
1,068 flights · 71% on time as flown · 0.8% cancel
Delta Air Lines70%
1,011 flights · 71% on time as flown · 0.7% cancel
Envoy Air (sold as American Eagle)65%
36 flights · 61% on time as flown · 0.8% cancel
American Airlines64%
935 flights · 66% on time as flown · 1.7% cancel
SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)59%
124 flights · 54% on time as flown · 0.9% cancel

On time by departure time

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

Before 9 AM79%
511 flights · avg delay 21 min
9 AM to noon71%
687 flights · avg delay 18 min
Noon to 3 PM73%
897 flights · avg delay 21 min
3 to 6 PM62%
176 flights · avg delay 33 min
6 to 9 PM57%
830 flights · avg delay 38 min

Best day: Tuesday (80%). Worst: Friday (72%).

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 aircraft38%
Airline (crew, maintenance, boarding)37%
Air traffic control and airport volume15%
Severe weather10%

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 SLC questions

What time of day is best to fly ORD to SLC?: Before 9 AM: 79% of flights arrived on time, against 57% 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 SLC?: United, with a season-adjusted 70% chance of operating and arriving on time over 1,068 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 SLC?: July (65% on time); the best was October (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.

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