Flights operate between Ontario (ONT) and SeaTac (SEA).
1 airline operates this route with 4-9 flights daily flights.
Average flight time is 2h 40m - 3h 07m.
Route distance is 962 miles (1548 km).
Route Distance
962 miles (1548 km)
Average Duration
2h 40m - 3h 07m
Airlines Operating This Route
Delta Air Lines
Flight Frequency
Daily Flights
4-9 flights
Weekly Flights
52
Typical Departure Time Ranges
Earliest Departure
06:45
Latest Departure
17:49
Route Intelligence Dashboard
Overall Connectivity Score
70
GoodRoute Diversity
1
Direct Routes
Delta Air Lines serves 1 destination from ONT
Weekly Frequency
21
Weekly Flights
Trend: Stable
Top 1 Most Frequent Routes - Details
| Route | Weekly Flights | Duration | Distance | Reliability |
|---|---|---|---|---|
| ONT → SeaTac (SEA) (SEA) | 21/week | 2h 40m - 3h 07m | 962 km | Moderate |
Flight Schedule & Filters
Delta Air Lines flights from Ontario (ONT) to SeaTac (SEA)
Delta Air Lines operates scheduled nonstop flights between Ontario (ONT) and SeaTac (SEA). Delta Air Lines operates 4-9 flights daily flights on this route.• Flight Duration: 2h 40m - 3h 07m (average flight time)• Distance: 962 miles (1548 km) (air miles between airports)• Daily Flights: 4-9 flights (scheduled departures per day)
Ontario (ONT)
US
SeaTac (SEA)
US
FLIGHT TIME
2h 40m - 3h 07m
FLIGHT DISTANCE
962 miles (1548 km)
2h 57m - 3h 4m
06:45
17:49
962 miles (1548 km)
April
1 (Show)
52
Delta Air Lines Terminal Information & Contact
Departure Terminal - Ontario (ONT)
Terminal: 2
Phone: 1-800-123-6645
Location: 2, Ontario, US
Arrival Terminal - SeaTac (SEA)
Terminal: 1
Phone: 1-800-123-6645
Location: 1, Seattle, US
Delta Air Lines Flight Schedule from Ontario (ONT) to SeaTac (SEA)
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
DL4042 |  Delta Air Lines | 06:45 | 09:49:00 | Embraer 175 (Enhanced Winglets) |
DL4096 | Delta Air Lines | 11:48 | 14:45:00 | Embraer 175 (Enhanced Winglets) |
DL4031 | Delta Air Lines | 17:49 | 20:50:00 | Embraer 175 (Enhanced Winglets) |
Delta Air Lines Monthly Flight Calendar
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Delta Air Lines Terminal Information
Departure Terminal at Ontario (ONT):
Terminal 2:
• Delta Air Lines Terminal Phone: 1-800-123-6645
Arrival Terminal at SeaTac (SEA):
• Terminal : Delta Air Lines operates from this terminal
Terminal 1:
• Delta Air Lines Terminal Phone: 1-800-123-6645
Delta Air Lines Contact Information and Customer Services
Delta Air Lines Address
1030 Delta Boulevard
Atlanta, Georgia 30354-1989, United States
Customer Service Phone
+1 800 221 12 12Official Website
delta.comFrequently Asked Questions
How many Delta Air Lines flights operate from Ontario (ONT) to Seattle (SEA)?
Delta Air Lines operates 3 flights from Ontario (ONT) to Seattle (SEA).
What city does Seattle (SEA) airport serve?
Seattle (SEA) airport serves SeaTac, US.
How long is the Delta Air Lines flight from Ontario (ONT) to Seattle (SEA)?
The flight duration is approximately 2h 40m - 3h 07m.
What is the distance from Ontario (ONT) to Seattle (SEA)?
The distance is 962 miles (1548 km).
What aircraft does Delta Air Lines use on this route?
Delta Air Lines uses Embraer 175 (Enhanced Winglets) on this route.
Which other airlines operate on this route?
2 other airlines operate on this route: Alaska Airlines, Frontier Airlines.
What are the earliest and latest Delta Air Lines flight departure times?
The earliest Delta Air Lines flight departs at 06:45 and the latest departs at 17:49.
View all Delta Air Lines flights to Ontario (ONT) →
Popular Delta Air Lines routes from Ontario include multiple destinations.
Route data verified regularly by Triposia Travel Research Team.