Airport Tips & Quick Reference Guide to Seattle–Tacoma Airport - Seatac (SEA)

DL3709 Delta Air Lines - Flight Status

Codeshare Flights
The flight WS7147 from WestJet (WS) is a codeshare flight operated by Delta Air Lines (DL) under the flight number DL3709. Check this page for details about flight DL3709.

Below, you can find details about Delta Air Lines flight DL3709, which currently operates between the airports of Seattle - Seattle-Tacoma International Airport (Airport Code SEA) and Ontario - Ontario International Airport (Airport Code ONT).
This flight data pertains specifically to the flight's details for Wednesday, April 29, 2026.

DL3709 On Time performance:
93
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

DL3709 Delta Air Lines to Ontario

Landed - Delayed
Delay: 82 minutes
Flight Status for Wednesday April 29, 2026
This flight is also scheduled for Today (April 30, 2026). See it here
This flight is also scheduled for Tomorrow (May 01, 2026). See it here

Airline information

Delta Air Lines
Delta Air Lines
Equipment: Embraer 175 (Enhanced Winglets)

Departure

Seattle (SEA)
April 29, 2026
Seattle-Tacoma International Airport
Departed at:
09:26 pm
Gate:
S2
Scheduled Departure Time: 07:50 pm

Arrival

Ontario (ONT)
April 29, 2026
Ontario International Airport
Arrived at:
11:59 pm
Terminal:
2
Gate:
207
Scheduled Arrival Time: 10:37 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.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:

- KL6269 - KLM Royal Dutch Airlines

- VS5470 - Virgin Atlantic

- WS7147 - WestJet

Additional Information

Which is the frequency of flight DL3709?
The flight DL3709 is scheduled to flight on daily basis.

Which is the distance of flight DL3709?
The distance between the two airports is 957 miles.

Which is the flight time of flight DL3709?
The scheduled flight time gate to gate is: 02:47 hours.
The real flight time gate to gate on average is: 02:39 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 airlines serves the same route between Seattle and Ontario:

Alaska Airlines
- Flight Number: AS1364. (On Time performance: 91 - Average Delay: 7 minutes)
- Flight Number: AS489. (On Time performance: 83 - Average Delay: 8 minutes)
- Flight Number: AS592. (On Time performance: 81 - Average Delay: 12 minutes)
- Flight Number: AS728. (On Time performance: 100 - Average Delay: 0 minutes)

Delta Air Lines
- Flight Number: DL4027. (On Time performance: 88 - Average Delay: 7 minutes)
- Flight Number: DL4031. (On Time performance: 88 - Average Delay: 7 minutes)
- Flight Number: DL4070. (On Time performance: 88 - Average Delay: 11 minutes)
- Flight Number: DL4170. (On Time performance: 100 - Average Delay: 2 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 April 13, 2026 to April 26, 2026, we have obtained these figures.
Total number of flights: 14
On Time: 13 ( 93 % )
Moderate Delay: 1 ( 7 % )
Significant Delay: 0 ( 0 % )
Major Delay: 0 ( 0 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )

Average Delay: 3 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 DL3709

Date
Departure
Arrival
Duration
Aircraft
Status
Wednesday
29 April
09:26 pm
Seattle (SEA)
11:59 pm
Ontario (ONT)
02h 33min
Embraer 175 (E
Embraer 175 (E
Landed - Delayed
Tuesday
28 April
07:43 pm
Seattle (SEA)
10:05 pm
Ontario (ONT)
02h 22min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Monday
27 April
07:46 pm
Seattle (SEA)
10:42 pm
Ontario (ONT)
02h 56min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Sunday
26 April
08:06 pm
Seattle (SEA)
10:48 pm
Ontario (ONT)
02h 42min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Saturday
25 April
07:43 pm
Seattle (SEA)
10:12 pm
Ontario (ONT)
02h 29min
Embraer 175
Embraer 175
Landed - On-time
Friday
24 April
07:42 pm
Seattle (SEA)
10:19 pm
Ontario (ONT)
02h 37min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Thursday
23 April
07:49 pm
Seattle (SEA)
10:25 pm
Ontario (ONT)
02h 36min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Wednesday
22 April
07:59 pm
Seattle (SEA)
10:44 pm
Ontario (ONT)
02h 45min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Tuesday
21 April
07:42 pm
Seattle (SEA)
10:25 pm
Ontario (ONT)
02h 43min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Monday
20 April
07:45 pm
Seattle (SEA)
10:30 pm
Ontario (ONT)
02h 45min
Embraer 175 (E
Embraer 175 (E
Landed - On-time