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Search Cheap Flights from Ontario to Seattle

Find affordable air fare deals from Ontario (ONT) to Seattle (SEA) and jet set for a memorable vacation without breaking the bank! Book Seattle flights on OneTravel offering exclusive airfare deals featuring the most traveled routes.


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    Ontario to Seattle Flight Route Facts

  • When does the earliest flight depart ONT? 6:00AM Alaska Airlines Flight #956
  • When does the latest flight depart SEA? 5:35PM China Airlines Flight #702
  • Which is the busiest month to travel from Ontario to Seattle?October
  • Which is the least busy month to travel from ONT to SEA?November
  • What is the travel distance between Ontario to Seattle?1,665 miles
  • What is the fare range for flights between ONT to SEA? $178 - $536
  • How many weekly flights are there are between ONT to SEA? There are 2 weekly flights between ONT and SEA.
  • Which is the busiest day in terms of passengers flying from ONT to SEA?Wednesday
  • In last 30 days, what is the %age of SEA visitors who spent less than 3 days in the city?100.00 %
  • Name the airport nearby SEA? Kenmore Air Harbor
  • Name the airports nearby ONT? Ogoki Post Airport
  • What is the cheapest return flight price from ONT to SEA? $178