Cheap flights Ontario — Seattle (ONT — SEA)

Good to know - Cheap tickets Ontario — Seattle

Cheapest flight found $36
Minimal flight time 2h 23m
Flight distance 1557 km
Most popular airline Alaska Airlines

Airfare Ontario – Seattle by month

Here you can find out in what months how much a ticket Ontario – Seattle costs to buy cheap plane tickets.

Month One-way Round-trip
May 2026
February 2026
January 2026
December 2025
November 2025
October 2025
September 2025
August 2025
July 2025
June 2025
May 2025
April 2025

Remember that the optimal time for booking air tickets is 59 days before the departure date, this is the average time at which air tickets were sold at the lowest prices.

Schedule of direct flights Ontario — Seattle

Departure Arrival Flight days Flight Airlines Flight time Airports
01:50 04:13 tue, fri 5X984 UPS 2h 23m Ontario International Airport — Boeing Field International Airport Select dates
01:50 04:23 wed, thu 5X984 UPS 2h 33m Ontario International Airport — Boeing Field International Airport Select dates
06:00 08:42 daily AS1091 Alaska Airlines 2h 42m Ontario International Airport — Seattle-Tacoma International Airport Select dates
10:03 12:53 daily F93164 Frontier (Seymour the Walrus Livery) 2h 50m Ontario International Airport — Seattle-Tacoma International Airport Select dates
11:25 14:19 daily DL3593 Delta Air Lines 2h 54m Ontario International Airport — Seattle-Tacoma International Airport Select dates
11:57 14:43 fri AS9801 Alaska Airlines 2h 46m Ontario International Airport — Seattle-Tacoma International Airport Select dates
12:00 14:38 mon, tue, wed, thu, fri, sun AS1111 Alaska Airlines 2h 38m Ontario International Airport — Seattle-Tacoma International Airport Select dates
12:00 14:45 sun QX9372 Alaska Airlines 2h 45m Ontario International Airport — Seattle-Tacoma International Airport Select dates
12:20 14:44 tue, wed, thu 5X2836 UPS 2h 24m Ontario International Airport — Boeing Field International Airport Select dates
14:21 16:58 daily AS1242 Alaska Airlines 2h 37m Ontario International Airport — Seattle-Tacoma International Airport Select dates
All routes

Sales of tickets from Ontario to Seattle in the last 48 hours

Dynamics airfare Ontario — Seattle by month for the last year

according to LowCost.Club for the last year

The airfare depends on the departure date. Our chart shows the low season prices on route Ontario — Seattle

The graph shows that booking flights Ontario — Seattle is best planned for July and flights Ontario — Seattle — Ontario in the month of June.

Flights Ontario — Seattle

The selection of cheap flights Ontario — Seattle

Here you can find and purchase the cheapest flights Ontario — Seattle from $36 and Ontario — Seattle — Ontario from $31.

The price of the flight Ontario — Seattle (United States) — Ontario from $31 (round-trip).

The average price of the flight Ontario — Seattle (United States) — Ontario $253 (round-trip).

Low cost flights Ontario — Seattle (ONT — SEA)

The distance between Ontario and Seattle 967 miles (or 1557 kilometres).

The time difference between Ontario and Seattle is 0 h.

Minimal flight time from Ontario to Seattle 2h 23m.

LowCostClub always do a comparison of airfares Ontario — Seattle with several airlines (include UPS, Alaska Airlines, Frontier (Seymour the Walrus Livery)). They will always give you all available options so you can find the cheapest flight to Seattle. In addition, you can choose the platform where you want to place your orders. There are also special offers for air tickets Ontario — Seattle. Last week, for instance, the cheapest round-trip prices stood at $31 while the cheapest one-way price that was available within the last week cost $36

Routes from nearby cities to Seattle

A flight from a neighbouring city can help you save money on plane tickets.

Most often, they fly to Seattle from Monterey, this is the closest city with an airport from Ontario. The cheapest ticket can be bought for a flight departing from Las Vegas from $20.

Popular International routes from Ontario

Popular routes from Seattle

If you are going to fly from Seattle, then study the popular flights. The most popular flights from Seattle:

Popular domestic routes from Ontario

FAQ about Ontario — Seattle

Yes, they do: 5X984, AS1091, F93164, DL3593, AS9801, AS1111, QX9372, 5X2836, AS1242, AS1119, DL4031, AS1087

Yes, you can fly from Ontario to Seattle. Ontario has 2 airports (Ontario International Airport, International Heliport) for flights. UPS, Alaska Airlines, Frontier (Seymour the Walrus Livery), Delta Air Lines depart from Ontario on mon, tue, wed, thu, fri, sat, sun. There are non-direct flights through ABX Air, Air Transport International, Amazon Air, American Eagle, Ameriflight, Atlas Air, China Airlines, Empire Airlines, FedEx, JetBlue, NetJets, Omni Air International, One Air, Southwest Airlines, Starlux, United Airlines, Volaris.

A direct flight lasts an average of 2h 23m, during which time the aircraft covers a distance of 1557 km.

The price of flights Ontario — Seattle starts from $36.

Planes fly Ontario — Seattle 7 times a week on the following days: mon, tue, wed, thu, fri, sat, sun

In Ontario — Ontario International Airport, International Heliport. In Seattle — Boeing Field International Airport, Kenmore Air Harbor SPB, Seattle-Tacoma International Airport.

The following flights fly between Ontario and Seattle: 5X984, 5X984, AS1091, F93164, DL3593, AS9801, AS1111, QX9372, 5X2836, AS1242, AS1242, AS1119, DL4031, AS1087, AS1087

High season is considered to be October and the cheapest month is July. Enter your preferred airports (or cities) and dates into the search form above to unlock the latest Ontario — Seattle flight deals.

The following airlines have direct flights Ontario — Seattle: UPS, Alaska Airlines, Frontier (Seymour the Walrus Livery), Delta Air Lines.

All the following airlines flights Ontario — Seattle: ABX Air, Air Transport International, Alaska Airlines, Amazon Air, American Eagle, Ameriflight, Atlas Air, China Airlines, Delta Air Lines, Empire Airlines, FedEx, Frontier (Seymour the Walrus Livery), JetBlue, NetJets, Omni Air International, One Air, Southwest Airlines, Starlux, United Airlines, UPS, Volaris.

Low price calendar

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