Compare all flight tickets and find cheap flights from Seattle to Ontario

Cheapest flight tickets


Price observed over the last 3 months for a round trip.

Average price of a round trip


Average flight ticket price recorded over the last 3 months for a round trip.

Flight duration


A flight from Seattle to Ontario takes on average 2h39.

Best time


According to user searches, the ideal month to go to Ontario is June.

Tips for finding a cheap flight from Seattle to Ontario

Check out our tips for booking your flight to Ontario (USA) from Seattle (USA) at the cheapest possible price.

Usually, the cheapest month to pick up a ticket on this route is June, with an average flight ticket price of $209 (calculation over the last two years). The most touristic season corresponds to the months of December, June and November.
For the cheapest flights, it is advisable to buy your ticket at least 161 days before the departure date.

The airline offering the cheapest flight tickets is Frontier Airlines. A ticket from the airline Frontier Airlines to Ontario costs on average $231.
The airlines that offer the most flights are Frontier Airlines and Frontier Airlines.

Price of flight tickets from Seattle to Ontario

Here is some information and tips to know before booking your flight:

  • Flight ticket prices range from $109 to $262
  • The average price of a flight ticket is about $231
  • Prices are lowest for stays in the month of June
  • The month in which booking a ticket is cheaper is: December
info departure city :
Seattle, USA
airports :
Kenmore Air Harbor Spb. (LKE)
Seattle-Tacoma International Airport (SEA)
Renton Municipal Airport (RNT)
King County International Airport (BFI)
local time :

Seattle is a city in the country USA, the time zone is GMT . In Seattle, it is currently {fromLocalTime}, the temperature is on average 14°C, with a minimum of 6°C and a maximum of 20°C.

The city of Seattle (SEA) has 4 airport(s): Kenmore Air Harbor Spb., Seattle-Tacoma, Renton and King County

destination info :
Ontario, USA
airports :
Ontario International Airport (ONT)
Cable Airport (CCB)
Chino Airport (CNO)
Brackett Field (POC)
local time :

Ontario is in the country USA, the time zone is GMT . In Ontario, it is currently {toLocalTime}, the temperature is on average 22°C, with a minimum of 16°C and a maximum of 28°C.

The city of Ontario has 4 airport(s): Ontario, Cable, Chino and Brackett Field

Useful info about Ontario

What is the least touristic period to go to Ontario?

If you want to visit Ontario during the least touristic period, choose the month of June.

What is the most popular time to travel to Ontario?

In Ontario, the most popular month is December. It is during this period that the prices offered by airlines are also the highest.

When should I book my flight from Seattle to Ontario?

According to our data, it is recommended to book your flight 161 days before your departure. If you book your flight ticket 24 weeks before your departure, you may find a price below average. You can also choose morning flights that are 100% cheaper than afternoon and evening flights. The cheapest day to book a flight from Seattle to Ontario is Thursday.

What are the arrival and destination airports when traveling between Seattle and Ontario?

When you leave, you can leave from Seattle-Tacoma, and you will arrive at Bob Hope, Los Angeles International or Ontario.

How to reach Seattle airport from the city centre?

The airport Kenmore Air Harbor Spb. is located 3 km, Seattle-Tacoma is located 16 km, Renton is located 16 km or King County is located 8 km from the city centre. You can access it by using public transportation, taking a taxi, or renting a car.

Are there other means of transportation to go from Seattle to Ontario?

Airplane is the only means of transportation listed on Liligo for this journey.

Are there big differences in weather between Seattle and Ontario?

In summer, the average temperature is 25°C in Ontario and 18°C in Seattle. The average rainfall in summer is 4 mm in Ontario and 39 mm in Seattle. In summer, it is warmer in Ontario and it rains less in Ontario. In winter, it is colder in Ontario and it rains more in Seattle.

Prepare your stay in Ontario

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