$64 Cheap Flights from Seattle (SEA) to Ontario (ONT)

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Cheap Flights from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl.

Prices were available within the past 7 days and starts at $64 for one-way flights and $140 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Frontier Airlines
Frontier Airlines
Alaska Airlines
Delta
Alaska Airlines
Alaska Airlines
Alaska Airlines
Alaska Airlines
Alaska Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Delta
Alaska Airlines
Delta
Frontier Airlines
Frontier Airlines
Alaska Airlines
Flight from Seattle to Ontario route information
Origin AirportSeattle - Tacoma Intl.
Destination AirportLos Angeles - Ontario Intl.
Airlines ServingAlaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, United
Flight Price$140
Distance956 mi

Seattle to Ontario Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from Seattle to Ontario offer the perfect respite. Not only does exploring Ontario provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from Seattle to Ontario may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from SEA to ONT today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of Ontario are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to Ontario more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Ontario is $64 now!

Frequently asked questions

How much is a flight from Sea-Tac Airport to Los Angeles - Ontario Intl. Airport (ONT)?
Based on fares quoted within the last 7 days on Expedia for flights departing within the next year, round-trip journeys from Sea-Tac Airport to ONT start from $140. Book now to get the best price for your journey. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Seattle - Tacoma Intl. Airport (SEA) to Ontario Airport?
Most flights can be conveniently canceled online, but whether you incur a fee depends on your airline. If you do need to cancel your break, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to ONT that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for Seattle - Tacoma Intl. Airport (SEA) to Ontario Airport flights, you’ll see a “no change fees” filter for you to select.
How many hours is the flight from Seattle - Tacoma Intl. Airport (SEA) to Ontario Airport?
Get comfortable, choose an in-flight TV show and 2 hours and 37 minutes will whiz by in a jiffy. That’s how long it’ll take you to reach Los Angeles - Ontario Intl. Airport (ONT) (ONT) from Sea-Tac Airport (SEA).
How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to Los Angeles - Ontario Intl. Airport (ONT)?
You’ll be cruising at altitude for a while, as the flight distance between SeaTac and Ontario is 963 mi (1,550 km). Create a playlist of your favorite songs before you leave home to keep yourself entertained during the trip.
Which airlines fly direct from Sea-Tac Airport to Los Angeles - Ontario Intl. Airport (ONT)?
One airline that services the route from SEA to Los Angeles - Ontario Intl. Airport (ONT) is Alaska Airlines (AS). It offers 91 flights every month. Like more options? Check out the ticket prices from Delta Air Lines (DL). This carrier offers 91 flights every month between these airports.
Are Sea-Tac Airport to Los Angeles - Ontario Intl. Airport (ONT) flight tickets cheaper when they're purchased at the last minute?
Flight prices change all the time, so not always. While last-minute flight deals between Seattle - Tacoma Intl. Airport (SEA) and Ontario Airport are possible, it’s also a good idea to monitor prices well before you fly. In fact, some carriers advertise their prices up to 12 months ahead of the departure date. Expedia is continuously updating the biggest bargains around, so keep checking and be ready to secure your seat when the price is right.
Can I fly from SEA to ONT right now?
To see what travel restrictions and quarantine requirements are in place for different citizens flying from Seattle - Tacoma Intl. Airport (SEA) to ONT please visit our COVID 19 travel advisor portal link
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