Essential Guide to Toronto Pearson Airport (YYZ) - NON OFFICIAL

UA2121 United Airlines - Flight Status

Codeshare Flights
The flight AC4990 from Air Canada (AC) is a codeshare flight operated by United Airlines (UA) under the flight number UA2121. Check this page for details about flight UA2121.

Below, you can find details about United Airlines flight UA2121, which currently operates between the airports of Toronto - Toronto Pearson International Airport (Airport Code YYZ) and Chicago - Chicago O'Hare International Airport (Airport Code ORD).
This flight data pertains specifically to the flight's details for Sunday, August 31, 2025.

UA2121 On Time performance:
43
We have calculated the percentage of flights that arrived within 15 minutes of their scheduled time, or earlier, based on real flight data from the last 3 months. More about punctuality and delays

Flight Status

UA2121 United Airlines to Chicago

Scheduled - On-time
Flight Status for Sunday August 31, 2025
This flight was also scheduled for Yesterday (August 29, 2025). See it here
This flight is also scheduled for Today (August 30, 2025). See it here

Airline information

United Airlines
United Airlines
Equipment: Airbus A319

Departure

Toronto (YYZ)
August 31, 2025
Toronto Pearson International Airport
Estimated Departure Time:
05:15 pm
Terminal:
1
Gate:
-
Scheduled Departure Time: 05:15 pm

Arrival

Chicago (ORD)
August 31, 2025
Chicago O'Hare International Airport
Estimated Arrival Time:
06:12 pm
Terminal:
1
Gate:
-
Scheduled Arrival Time: 06:12 pm
Disclaimer
The information displayed on this website is gathered from third-party providers with a wide reputation on the sector, which in turn obtain the information from the airlines. This data is provided only for informative purposes. www.torontoairport.com assumes no responsibility for loss or damage as a result of relying on information posted here. Please contact your airline to verify flight status.

Codeshare Flights

This flight is shared with other airlines, this means that these other flights are the same:

- AC4990 - Air Canada

- NZ9810 - Air New Zealand

Additional Information

Which is the frequency of flight UA2121?
The flight UA2121 is scheduled to flight on daily basis.

Which is the distance of flight UA2121?
The distance between the two airports is 436 miles.

Which is the flight time of flight UA2121?
The scheduled flight time gate to gate is: 01:57 hours.
The real flight time gate to gate on average is: 02:17 hours.

Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Toronto: 2025-08-30 04:16:58
Current Time in Chicago: 2025-08-30 03:16:58

Alternative Flights

The following airlines serves the same route between Toronto and Chicago:

American Airlines
- Flight Number: AA3524. (On Time performance: 90 - Average Delay: 9 minutes)
- Flight Number: AA3608. (On Time performance: 72 - Average Delay: 22 minutes)
- Flight Number: AA4530. (On Time performance: 37 - Average Delay: 50 minutes)
- Flight Number: AA4731. (On Time performance: 66 - Average Delay: 25 minutes)
- Flight Number: AA4770. (On Time performance: 67 - Average Delay: 27 minutes)
- Flight Number: AA6488. (On Time performance: 72 - Average Delay: 23 minutes)

Air Canada
- Flight Number: AC503. (On Time performance: 60 - Average Delay: 19 minutes)
- Flight Number: AC507. (On Time performance: 63 - Average Delay: 29 minutes)
- Flight Number: AC511. (On Time performance: 54 - Average Delay: 32 minutes)
- Flight Number: AC8905. (On Time performance: 65 - Average Delay: 20 minutes)
- Flight Number: AC8909. (On Time performance: 59 - Average Delay: 30 minutes)

United Airlines
- Flight Number: UA1371. (On Time performance: 45 - Average Delay: 35 minutes)
- Flight Number: UA1538. (On Time performance: 86 - Average Delay: 11 minutes)
- Flight Number: UA3499. (On Time performance: 95 - Average Delay: 3 minutes)
- Flight Number: UA3605. (On Time performance: 85 - Average Delay: 7 minutes)
- Flight Number: UA3616. (On Time performance: 77 - Average Delay: 20 minutes)
- Flight Number: UA3640. (On Time performance: 85 - Average Delay: 10 minutes)
- Flight Number: UA490. (On Time performance: 90 - Average Delay: 4 minutes)
- Flight Number: UA5563. (On Time performance: 83 - Average Delay: 19 minutes)
- Flight Number: UA5676. (On Time performance: 86 - Average Delay: 5 minutes)

Punctuality and delays

We have gathered data from recent months and present below an analysis of how timely the flights have been.

In terms of On-Time Performance, by analyzing the flight data from the last three months, spanning from August 19, 2025 to August 25, 2025, we have obtained these figures.
Total number of flights: 7
On Time: 3 ( 43 % )
Moderate Delay: 1 ( 14 % )
Significant Delay: 3 ( 43 % )
Major Delay: 0 ( 0 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )

Average Delay: 23 minutes.
Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions

Last Past Flights UA2121

Date
Departure
Arrival
Duration
Aircraft
Status
Friday
29 August
05:07 pm
Toronto (YYZ)
06:56 pm
Chicago (ORD)
02h 49min
Airbus A319
Airbus A319
Landed - Delayed
Thursday
28 August
05:08 pm
Toronto (YYZ)
06:28 pm
Chicago (ORD)
02h 20min
Airbus A319
Airbus A319
Landed - Delayed
Wednesday
27 August
05:39 pm
Toronto (YYZ)
06:19 pm
Chicago (ORD)
01h 40min
Airbus A319
Airbus A319
Landed - On-time
Tuesday
26 August
05:09 pm
Toronto (YYZ)
06:42 pm
Chicago (ORD)
02h 33min
Airbus A319
Airbus A319
Landed - Delayed
Monday
25 August
05:14 pm
Toronto (YYZ)
06:19 pm
Chicago (ORD)
02h 05min
Airbus A319
Airbus A319
Landed - On-time
Sunday
24 August
05:15 pm
Toronto (YYZ)
06:26 pm
Chicago (ORD)
02h 11min
Airbus A319
Airbus A319
Landed - On-time
Saturday
23 August
05:54 pm
Toronto (YYZ)
06:52 pm
Chicago (ORD)
01h 58min
Airbus A319
Airbus A319
Landed - Delayed
Friday
22 August
05:07 pm
Toronto (YYZ)
06:12 pm
Chicago (ORD)
02h 05min
Airbus A319
Airbus A319
Landed - On-time
Thursday
21 August
05:10 pm
Toronto (YYZ)
06:55 pm
Chicago (ORD)
02h 45min
Airbus A319
Airbus A319
Landed - Delayed
Wednesday
20 August
05:22 pm
Toronto (YYZ)
06:45 pm
Chicago (ORD)
02h 23min
Airbus A319
Airbus A319
Landed - Delayed