Direct (non-stop) flights from Ontario (ONT) to SeaTac (SEA)
Find comprehensive flight information, schedules, and booking details for direct flights from Ontario (ONT), US to SeaTac (SEA), US. This popular route is operated by 3 airlines, offering multiple daily departures.• 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 53m - 3h 4m
06:00
19:21
962 miles (1548 km)
April
3 (Show)
52
Terminal 1 (SeaTac (SEA))
Flight Schedule
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Airlines Operating This Route
Alaska Airlines (AS), Delta Air Lines (DL), Frontier Airlines (F9)
Click any airline to view their specific flight schedules, policies, and route details for this connection. You can also explore flights from Ontario (ONT) and flights to SeaTac (SEA).
Route Insights
Route Demand
This route sees high demand with 52 weekly flights, making it one of the busiest connections between Ontario (ONT) and Seattle (SEA).
Route Importance
Multiple airlines compete on this route (3 carriers), indicating its significance in connecting Ontario (ONT) and Seattle (SEA). This competition often leads to competitive pricing and multiple daily departure options.
Best Time to Fly
Best Value Period
April typically offers the best value for travelers, with lower average fares compared to peak travel periods.
Price Trends
Price variation throughout the year is significant, with Apr being the most affordable month and prices increasing during peak travel seasons.
Distance & Duration Explained
Route Distance
At 962 miles (1548 km), this is an ultra-long-haul route between Ontario (ONT) and Seattle (SEA), requiring larger aircraft and extended flight times.
Flight Duration
Flight duration averages 2h 40m - 3h 07m, with actual times ranging from 2h 53m - 3h 4m depending on aircraft type, wind conditions, and routing.
Airline Comparison
Available Airlines
Travelers have 3 airline options on this route: Alaska Airlines, Delta Air Lines, Frontier Airlines. Each airline offers different schedules, pricing, and service levels to meet various travel needs.
Flight Frequency
Alaska Airlines operates the most flights on this route with 4 daily departures, followed by Delta Air Lines and Frontier Airlines.
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Best Time to Visit & Travel Planning
Cheapest Day
Cheapest Month
Average Fare
$216
Travel Planning Tips for Ontario (ONT) to SeaTac (SEA)
- Best Day to Book
Tuesday typically offers the lowest fares for flights from Ontario (ONT) to SeaTac (SEA). Consider booking on this day for potential savings.
- Best Month to Travel
January is generally the cheapest month to fly from Ontario (ONT) to SeaTac (SEA). Plan your trip during this month for the best deals.
- Average Flight Price
The average fare for flights from Ontario (ONT) to SeaTac (SEA) is approximately $216. Prices may vary based on booking time, season, and airline.
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Related Pages
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Frequently Asked Questions
How many flights operate from Ontario (ONT) to Seattle (SEA)?
There are 8 direct flights operating from Ontario (ONT) to Seattle (SEA). Approximately 4-9 flights daily.
Which airlines operate flights from Ontario (ONT) to Seattle (SEA)?
3 airlines operate on this route: Alaska Airlines, Delta Air Lines, Frontier Airlines.
How long is the flight from Ontario (ONT) to Seattle (SEA)?
The flight duration from Ontario (ONT) to Seattle (SEA) is approximately 2h 40m - 3h 07m.
What is the distance from Ontario (ONT) to Seattle (SEA)?
The distance from Ontario (ONT) to Seattle (SEA) is 962 miles (1548 km).
What is the flight time range for this route?
Flight times on this route range from 2h 53m - 3h 4m.
What are the earliest and latest flight departure times?
The earliest flight departs at 06:00 and the latest flight departs at 19:21.
What is the cheapest month to fly from Ontario (ONT) to Seattle (SEA)?
April is typically the cheapest month to fly on this route.
How many flights operate per week on this route?
Approximately 52 flights operate per week from Ontario (ONT) to Seattle (SEA).
What types of aircraft operate on this route?
This route is served by Boeing 737-800 (winglets) Passenger/BBJ2, Embraer 175 (Enhanced Winglets), Boeing 737-900 (winglets) Passenger/BBJ3, Boeing 737MAX 9 Passenger, Airbus A321.
What is the average flight price from Ontario (ONT) to Seattle (SEA)?
The average flight price for a round-trip ticket from Ontario (ONT) to Seattle (SEA) is approximately $249 USD. Prices can vary based on booking time, season, and airline.
When is the best time to book flights from Ontario (ONT) to Seattle (SEA) for the lowest prices?
April is typically the cheapest month to fly from Ontario (ONT) to Seattle (SEA). Booking in advance and avoiding peak travel seasons can help you find better deals.
How many airlines offer flights from Ontario (ONT) to Seattle (SEA)?
3 airlines offer direct flights from Ontario (ONT) to Seattle (SEA), providing travelers with multiple options for scheduling and pricing.
How far is Seattle (SEA) from Ontario (ONT)?
The distance from Ontario (ONT) to Seattle (SEA) is 962 miles (1548 km). This is a long-haul flight route.
How long does it take to fly from Ontario (ONT) to Seattle (SEA)?
The flight time from Ontario (ONT) to Seattle (SEA) is approximately 2h 40m - 3h 07m. Actual flight duration may vary based on weather conditions, aircraft type, and routing.
What city does Seattle (SEA) serve?
Seattle (SEA) serves Seattle, US.