Informational Guide to Macdonald-Cartier International Airport - Non Official

UA4451 United Airlines - Flight Status

Below, you can find details about United Airlines flight UA4451, which currently operates between the airports of Dulles - Washington Dulles International Airport (Airport Code IAD) and Ottawa - Ottawa Macdonald-Cartier International Airport (Airport Code YOW).
This flight data pertains specifically to the flight's details for Thursday, December 18, 2025.

UA4451 On Time performance:
63
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

UA4451 United Airlines from Dulles

This flight is not scheduled for December 18, 2025.

Airline information

United Airlines
United Airlines

Departure

Dulles (IAD)
December 16, 2025
Washington Dulles International Airport

Arrival

Ottawa (YOW)
December 16, 2025
Ottawa Macdonald-Cartier International Airport
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.ottawa-airport.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:

- AC4695 - Air Canada

Additional Information

Which is the frequency of flight UA4451?
The flight UA4451 is scheduled to flight on daily basis.

Which is the distance of flight UA4451?
The distance between the two airports is 449 miles.

Which is the flight time of flight UA4451?
The scheduled flight time gate to gate is: 01:40 hours.
The real flight time gate to gate on average is: 01:43 hours.

Are the departure airport and arrival airport at the same Time Zone?
Yes, both airports are in the same timezone.

Alternative Flights

The following airline serve the same route between Dulles and Ottawa:
United Airlines - Flight Number: UA4418. (On Time performance: 70 - Average Delay: 26 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 December 02, 2025 to December 09, 2025, we have obtained these figures.
Total number of flights: 8
On Time: 5 ( 63 % )
Moderate Delay: 0 ( 0 % )
Significant Delay: 1 ( 13 % )
Major Delay: 2 ( 25 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )

Average Delay: 36 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: We have gathered available data from last twelve closed months, spanning from December 02, 2024 to May 20, 2025. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.

Last Past Flights UA4451

Date
Departure
Arrival
Duration
Aircraft
Status
Wednesday
17 December
10:22 pm
Dulles (IAD)
11:57 pm
Ottawa (YOW)
01h 35min
Canadair (Bomb
Canadair (Bomb
Landed - On-time
Tuesday
16 December
10:34 pm
Dulles (IAD)
12:16 am
Ottawa (YOW)
01h 42min
Canadair (Bomb
Canadair (Bomb
Landed - Delayed
Monday
15 December
10:39 pm
Dulles (IAD)
12:22 am
Ottawa (YOW)
01h 43min
Canadair (Bomb
Canadair (Bomb
Landed - Delayed
Sunday
14 December
12:34 am
Dulles (IAD)
02:21 am
Ottawa (YOW)
01h 47min
Canadair (Bomb
Canadair (Bomb
Landed - Delayed
Saturday
13 December
10:26 pm
Dulles (IAD)
11:55 pm
Ottawa (YOW)
01h 29min
Canadair (Bomb
Canadair (Bomb
Landed - On-time
Friday
12 December
10:42 pm
Dulles (IAD)
12:30 am
Ottawa (YOW)
01h 48min
Canadair (Bomb
Canadair (Bomb
Landed - Delayed
Thursday
11 December
11:10 pm
Dulles (IAD)
12:30 am
Ottawa (YOW)
01h 20min
Canadair (Bomb
Canadair (Bomb
Landed - Delayed
Wednesday
10 December
10:11 pm
Dulles (IAD)
11:45 pm
Ottawa (YOW)
01h 34min
Canadair (Bomb
Canadair (Bomb
Landed - On-time
Tuesday
09 December
10:12 pm
Dulles (IAD)
12:00 am
Ottawa (YOW)
01h 48min
Canadair (Bomb
Canadair (Bomb
Landed - On-time
Monday
08 December
10:45 pm
Dulles (IAD)
12:42 am
Ottawa (YOW)
01h 57min
Canadair (Bomb
Canadair (Bomb
Landed - Delayed