Informational Guide to Seattle–Tacoma Airport - Seatac (SEA) - NON OFFICIAL

UA684 United Airlines - Flight Status

Below, you can find details about United Airlines flight UA684, which currently operates between the airports of Seattle - Seattle-Tacoma International Airport (Airport Code SEA) and Dulles - Washington Dulles International Airport (Airport Code IAD).
This flight data pertains specifically to the flight's details for Wednesday, August 27, 2025.

UA684 On Time performance:
100
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

UA684 United Airlines to Dulles

En Route - On-time
Flight Status for Wednesday August 27, 2025
This flight is also scheduled for Today (August 28, 2025). See it here
This flight is also scheduled for Tomorrow (August 29, 2025). See it here

Airline information

United Airlines
United Airlines
Equipment: Boeing 737MAX 9 Passenger

Departure

Seattle (SEA)
August 27, 2025
Seattle-Tacoma International Airport
Departed at:
10:55 pm
Gate:
A8
Scheduled Departure Time: 10:55 pm

Arrival

Dulles (IAD)
August 28, 2025
Washington Dulles International Airport
Estimated Arrival Time:
06:53 am
Terminal:
-
Gate:
D14
Scheduled Arrival Time: 06:58 am
Baggage: 3
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.seattle-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:

- CM2765 - Copa Airlines

Additional Information

Which is the frequency of flight UA684?
The flight UA684 is scheduled to flight on daily basis.

Which is the distance of flight UA684?
The distance between the two airports is 2300 miles.

Which is the flight time of flight UA684?
The scheduled flight time gate to gate is: 05:03 hours.
The real flight time gate to gate on average is: 04:42 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 Seattle: 2025-08-28 00:27:31
Current Time in Dulles: 2025-08-28 03:27:31

Alternative Flights

The following airlines serves the same route between Seattle and Dulles:

Alaska Airlines
- Flight Number: AS348. (On Time performance: 54 - Average Delay: 20 minutes)
- Flight Number: AS367. (On Time performance: 69 - Average Delay: 15 minutes)
- Flight Number: AS406. (On Time performance: 65 - Average Delay: 17 minutes)

Delta Air Lines
- Flight Number: DL541. (On Time performance: 74 - Average Delay: 13 minutes)

United Airlines
- Flight Number: UA1873. (On Time performance: 83 - Average Delay: 5 minutes)
- Flight Number: UA2019. (On Time performance: 66 - Average Delay: 22 minutes)
- Flight Number: UA2217. (On Time performance: 88 - Average Delay: 69 minutes)
- Flight Number: UA2275. (On Time performance: 80 - Average Delay: 11 minutes)
- Flight Number: UA2402. (On Time performance: 65 - Average Delay: 38 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 26, 2025, we have obtained these figures.
Total number of flights: 8
On Time: 8 ( 100 % )
Moderate Delay: 0 ( 0 % )
Significant Delay: 0 ( 0 % )
Major Delay: 0 ( 0 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )

Average Delay: 2 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 October 27, 2024 to December 02, 2024. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.

Note: We have excluded some months from the graph, since the quantity and quality of the data is not representative enough.

Last Past Flights UA684

Date
Departure
Arrival
Duration
Aircraft
Status
Thursday
28 August
10:55 pm
Seattle (SEA)
06:53 am
Dulles (IAD)
04h 58min
Boeing 737MAX
Boeing 737MAX
- On-time
Wednesday
27 August
10:54 pm
Seattle (SEA)
06:30 am
Dulles (IAD)
04h 36min
Boeing 737-900
Boeing 737-900
Landed - On-time
Tuesday
26 August
11:05 pm
Seattle (SEA)
07:07 am
Dulles (IAD)
05h 02min
Boeing 737-900
Boeing 737-900
Landed - On-time
Monday
25 August
11:02 pm
Seattle (SEA)
06:29 am
Dulles (IAD)
04h 27min
Boeing 737MAX
Boeing 737MAX
Landed - On-time
Sunday
24 August
11:02 pm
Seattle (SEA)
06:38 am
Dulles (IAD)
04h 36min
Boeing 737-900
Boeing 737-900
Landed - On-time
Saturday
23 August
10:50 pm
Seattle (SEA)
06:22 am
Dulles (IAD)
04h 32min
Boeing 737MAX
Boeing 737MAX
Landed - On-time
Friday
22 August
11:18 pm
Seattle (SEA)
07:03 am
Dulles (IAD)
04h 45min
Boeing 737MAX
Boeing 737MAX
Landed - On-time
Thursday
21 August
10:52 pm
Seattle (SEA)
06:46 am
Dulles (IAD)
04h 54min
Boeing 737MAX
Boeing 737MAX
Landed - On-time
Wednesday
20 August
10:59 pm
Seattle (SEA)
06:51 am
Dulles (IAD)
04h 52min
Boeing 737MAX
Boeing 737MAX
Landed - On-time