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SEA (Seattle) to ONT (Ontario) Flights $143.6

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Cheap SEA to ONT Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Orange County


Long Beach


Interesting Facts About Flights from Seattle to Ontario (SEA to ONT)

Question : Can you cut down on flight costs by changing the day of the week you travel to Ontario?
Answer : For the month of August, Tuesday is your lowest-cost day to fly. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.

Question : What is the shortest flight from SEA to ONT?
Answer : The quickest direct flight is two hours and 23 minutes via Alaska Airlines. If you catch the 7:29 AM PDT departure, you'll arrive at 9:52 AM PDT.

Question : Which airline has been on time from Seattle-Tacoma International Airport (SEA) to Ontario International Airport (ONT) the most?
Answer : SkyWest Airlines holds the best record for flights from SEA to ONT with a 92% on-time rate. If they are late for some reason though, the average delay is about half an hour.

Question : What's the likelihood of you being delayed on this route?
Answer : Using the combined on-time percentage and average delay breakdown, Seattle to Ontario currently has a 4 out of a possible 5 star rating. A 4-star rating means you should feel confident in getting to Ontario on time.

Question : How many departure times from Seattle-Tacoma International Airport (SEA) to Ontario International Airport (ONT) are there on a daily basis?
Answer : It does differ by the day of the week, but on average, you can expect two different choices of flight times when you book. Compared to the average route departing the United States with five flight times, you won't have as many choices as most.

Question : How long will the flight typically be from Seattle-Tacoma International Airport (SEA) to Ontario International Airport (ONT)?
Answer : Flying from SEA to ONT typically takes about two hours and 29 minutes.

Question : From Seattle to Ontario, which day of the week is going to have the most flight times?
Answer : With two total flight time options, Saturday provides the most flexibility from SEA to ONT. Note that the day with the most flight time options for all flights departing from the United States is Sunday with 5,738.