Cheap flights Ontario — Seattle (ONT — SEA)

Good to know - Cheap tickets Ontario — Seattle

Cheapest flight found $36
Minimal flight time 2h 24m
Flight distance 1557 km
Most popular airline Delta Air Lines

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
October 2026
August 2026
July 2026
June 2026
May 2026
April 2026
March 2026
February 2026
January 2026
December 2025
November 2025
October 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 04:14 tue, wed, thu, fri 5X984 UPS 2h 24m Ontario International Airport — Boeing Field International Airport Select dates
06:00 08:54 mon, thu, fri, sun AS607 Alaska SkyWest 2h 54m Ontario International Airport — Seattle-Tacoma International Airport Select dates
07:30 10:36 wed DL4042 Delta Air Lines 3h 6m Ontario International Airport — Seattle-Tacoma International Airport Select dates
10:44 13:35 mon, tue, wed, thu, fri, sun AS654 Alaska SkyWest 2h 51m Ontario International Airport — Seattle-Tacoma International Airport Select dates
11:00 13:51 sat AS654 Alaska SkyWest 2h 51m Ontario International Airport — Seattle-Tacoma International Airport Select dates
11:40 14:25 tue, wed, thu, fri, sat, sun DL1566 Delta Air Lines 2h 45m Ontario International Airport — Seattle-Tacoma International Airport Select dates
11:42 14:45 mon, tue, fri, sat DL4070 Delta Air Lines 3h 3m Ontario International Airport — Seattle-Tacoma International Airport Select dates
11:48 14:45 daily DL4096 Delta Air Lines 2h 57m Ontario International Airport — Seattle-Tacoma International Airport Select dates
11:53 14:44 mon, wed, thu, sat, sun AS654 Alaska SkyWest 2h 51m Ontario International Airport — Seattle-Tacoma International Airport Select dates
11:53 14:44 mon, thu, fri, sat AS654 AlphaSky 2h 51m 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 June 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 $25.

The price of the flight Ontario — Seattle (United States) — Ontario from $25 (round-trip).

The average price of the flight Ontario — Seattle (United States) — Ontario $246 (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 24m.

LowCostClub always do a comparison of airfares Ontario — Seattle with several airlines (include UPS, Alaska SkyWest, Delta Air Lines). 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 $25 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.

The most frequent flight to Seattle is from Los Angeles. The cheapest airfare can be purchased with a flight from Las Vegas from $20. The nearest airports from Ontario with a flight to Seattle are in Monterey.

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, AS607, DL4042, AS654, DL1566, DL4070, DL4096, DL4031, AS665

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

A direct flight lasts an average of 2h 24m, 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, AS607, DL4042, AS654, AS654, DL1566, DL4070, DL4096, AS654, AS654, AS654, DL4096, DL4096, DL4070, DL4031, AS665

High season is considered to be July and the cheapest month is June. 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 SkyWest, Delta Air Lines, AlphaSky.

All the following airlines flights Ontario — Seattle: ABX Air, Advanced Air, Air Transport International, Alaska SkyWest, AlphaSky, American Eagle, Ameriflight, Atlas Air, China Airlines, Delta Air Lines, Empire Airlines, FedEx, Frontier (Wiley the Bison Livery), Kalitta Air, NetJets, One Air, Southwest Airlines, STARLUX, United Express, UPS, Volaris.

Low price calendar

We use cookies and similar technologies for different purposes. Read the privacy policy. If you use the site you agree to them.