¥11,950 Cheap Flights from Ontario (ONT) to Seattle (SEA)

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Ontario to Seattle (ONT-SEA)

Prices were available within the past 7 days and start at ¥11,950 for one-way flights and ¥19,920 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Delta
Hawaiian Airlines
Delta
Delta
Delta
Hawaiian Airlines
Hawaiian Airlines
Delta
United

Find the cheapest month to fly from Ontario (ONT) to Seattle (SEA)

March is typically the cheapest month to fly

From ¥11,795 - ¥42,228 per traveler.

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 ¥19,920. 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.

Travel information

Travel information

Origin airport
Los Angeles - Ontario Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
¥19,920
Distance
1530 km
Average flight time
2 hours 49 mins

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Book with confidence

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Ontario nearby Airports

Los Angeles

Orange County

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