¥11,120 Cheap Flights from Ontario (ONT) to Seattle (SEA)

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Cheap Flights from Ontario to Seattle (ONT-SEA)

Prices were available within the past 7 days and start at ¥11,120 for one-way flights and ¥20,730 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
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Frontier Airlines
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United
Flights from Ontario (ONT) to Seattle (SEA)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
¥20,730
Distance
1530 km
Average flight time
2 hours 50 mins

Ontario to Seattle Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Ontario to will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring Seattle.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with ONT to SEA flights that won’t make your bank account wince. Ready to temporarily leave behind Ontario for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to SEA with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

Frequently asked questions

How much is a flight from Ontario Airport to Sea-Tac Airport?
Start packing your suitcase, because round-trip flights from Ontario Airport to SEA start from ¥20,730. That’s based on airfares listed within the last 7 days on Expedia for flights departing within the next year. Prices can rise quickly, so book today to lock in the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Los Angeles - Ontario Intl. Airport (ONT) to Sea-Tac Airport?
The majority of flights can be canceled online, but each air carrier has its own terms and conditions. If you do have to cancel your flight, visit our Customer Service Portal and follow the instructions.
How do I find cheap flights from Ontario Airport to SEA 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 Los Angeles - Ontario Intl. Airport (ONT) to SEA flights, you’ll see a “no change fees” filter for you to select.
How many hours is the flight from Los Angeles - Ontario Intl. Airport (ONT) to Seattle - Tacoma Intl. Airport (SEA)?
Put your seat back, select an in-flight TV show and 2 hours and 40 minutes will pass by before you know it. That’s how long it takes to jet to SEA from Ontario Airport.
How far is the flight from ONT to SEA?
Around 1,550 kilometers separates Ontario and SeaTac, so pack some entertainment to help you fill in a few hours. That gripping novel you haven’t had time to finish will be ideal.
Which airlines fly direct from Ontario Airport to Sea-Tac Airport?
There are a few airlines that travel directly from Ontario Airport to Seattle - Tacoma Intl. Airport (SEA). Alaska Airlines (AS) is a popular option, offering 121 flights on this route each month. You could also check out the fares available with Delta Air Lines (DL). This carrier operates 91 flights every month between Ontario and SeaTac.
Are Ontario Airport to SEA flight tickets cheaper when they're purchased at the last minute?
Flight prices go up and down like a yo-yo, so not always. While last-minute flight deals between Ontario Airport and SEA are of course possible, it’s also a good idea to keep a close eye on prices well before you fly. In fact, some air carriers publish their prices up to a year prior to the departure date. Expedia is continuously updating the biggest bargains around, so keep checking and be ready to book when the fares dip.
Ontario nearby Airports

Orange County

Los Angeles

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