Cheap flights from Seattle to Ontario

Choose between Southwest Airlines, Alaska Airlines, or Delta Air Lines to find the best price

Travelers usually depart from Seattle–Tacoma International, Seattle King Street railway station, Seattle, WA - Poly Clinic, Seattle, WA-Harborview Med , or Seattle-Virgin Mason Hospital Greyhound station when they travel from Seattle to Ontario. Book your trip to arrive at Ontario International, Ontario, CA station, Montclair (Ontario), or Ontario Bus Stop. The distance between Seattle and Ontario is 1542 km. The most popular airlines for this route are Southwest Airlines, Alaska Airlines, Delta Air Lines, United Airlines, and Frontier Airlines. Seattle and Ontario have 199 direct flights per week.

Weekly flights

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Number of flights41264810-4232

Fly direct with

Delta Air Lines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

Alaska Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

Check-in for a flight from Seattle to Ontario

NameCarrier codeIATA CodePassport needed during bookingAirport check-in closesOnline check-in available
Southwest AirlinesSWAWNNoUnknownNo
Alaska AirlinesASAASYesUnknownNo
Delta Air LinesDALDLYesUnknownNo
United AirlinesUALUAYesUnknownNo
Frontier AirlinesFFTF9NoUnknownNo

Frequently asked questions

How long does it take to travel from Seattle to Ontario?

A one-way nonstop (direct) flight between Seattle and Ontario takes around 2.5 hours.

What is the flight distance between Seattle and Ontario?

The flight distance between Seattle and Ontario is 1542 km.

What airlines offer nonstop (direct) flights between Seattle and Ontario?

Several carriers operate flights between Seattle and Ontario. Airlines offering nonstop (direct) flights include Alaska Airlines, Delta Air Lines.

What are the most popular routes to and from Seattle?

Travelers frequently search for route combinations, such as Seattle and McCarran International, Miami International, Denver International, San Francisco International, Dallas/Fort Worth International, Phoenix Sky Harbor International, O Hare International, Vancouver International, San Diego International, Minneapolis–Saint Paul International, Philadelphia International.

What are the most popular routes to and from Ontario?

Travelers frequently search for route combinations, such as Ontario and McCarran International, Miami International, Denver International, Dallas/Fort Worth International, Phoenix Sky Harbor International, Ronald Reagan Washington National, O Hare International, Philadelphia International, Sacramento International, San Jose International, Oakland International.

Which airports are there in Seattle?

Seattle is mainly served by Seattle–Tacoma International. But there are other airports nearby, including Kenmore Air Harbor Seaplane Base, Boeing Field.

What airports are near Seattle?

The main airport in Seattle is Seattle–Tacoma International. It is also served by Portland International, Vancouver International, Bellingham International, Paine Field Everett, Abbotsford International, Pangborn Memorial, Yakima Air Terminal, Vancouver Harbour Flight Centre, Friday Harbor Airport, Kenmore Air Harbor.

What airports are near Ontario?

The main airport in Ontario is Ontario International. It is also served by Tijuana International, San Diego International, John Wayne, Hollywood Burbank, Ontario International, Palm Springs International, Long Beach, Imperial County, Meadows Field, Santa Barbara Municipal.

What buses and trains depart from Seattle?

A number of bus and train companies depart from Seattle, including Greyhound.

Is it possible to combine flights, buses, and trains in one itinerary when traveling between Seattle and Ontario?

What is Virtual Interlining and how do I use it?

Which airlines fly between Seattle and Ontario?

When's the best time to travel between Seattle and Ontario?

What flights operate between Seattle and Ontario?

How many airports are there near Seattle?

How many airports are there near Ontario?

Is it possible to reach Seattle by bus or train?

What time do nonstop (direct) flights between Seattle and Ontario depart?

What time do nonstop (direct) flights between Seattle and Ontario arrive?

What time do flights between Seattle and Ontario depart?

What time do flights between Seattle and Ontario arrive?

Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.

Find the best connection from Seattle to Ontario

Search, compare, and book flights, trains, or buses to get there.

Search flights, trains & buses