Photo by Ontario Convention & Visitors Bureau / Jon Edwards.

Popular airlines from Seattle-Tacoma International Airport (SEA) to Los Angeles - Ontario Intl. Airport (ONT)
- Alaska Airlines
Alaska Airlines
- Delta
Delta
- United
United
- Frontier Airlines
Frontier Airlines
- Southwest Airlines
Southwest Airlines
- American Airlines
American Airlines
- Hawaiian Airlines
Hawaiian Airlines
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Cheap Flights from Seattle (SEA) to Ontario (ONT)
Prices were available within the past 7 days and start at ฿3,910 for one-way flights and ฿5,815 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, 12 Nov - Sat, 15 Nov
SEA
Seattle
ONT
Ontario
฿5,815 Return, found 7 hours ago
฿5,815
Return
found 7 hours ago

Wed, 12 Nov - Thu, 20 Nov
SEA
Seattle
ONT
Ontario
฿5,870 Return, found 7 hours ago
฿5,870
Return
found 7 hours ago

Thu, 13 Nov - Sat, 15 Nov
SEA
Seattle
ONT
Ontario
฿6,145 Return, found 7 hours ago
฿6,145
Return
found 7 hours ago

Thu, 13 Nov - Thu, 20 Nov
SEA
Seattle
ONT
Ontario
฿6,475 Return, found 7 hours ago
฿6,475
Return
found 7 hours ago

Fri, 14 Nov - Sun, 16 Nov
SEA
Seattle
ONT
Ontario
฿6,500 Return, found 5 days ago
฿6,500
Return
found 5 days ago

Sat, 8 Nov - Wed, 12 Nov
SEA
Seattle
ONT
Ontario
฿7,780 Return, found 7 hours ago
฿7,780
Return
found 7 hours ago

Fri, 14 Nov - Sun, 16 Nov
SEA
Seattle
ONT
Ontario
฿7,985 Return, found 5 days ago
฿7,985
Return
found 5 days ago

Sat, 8 Nov - Sun, 16 Nov
SEA
Seattle
ONT
Ontario
฿8,105 Return, found 7 hours ago
฿8,105
Return
found 7 hours ago

Sat, 25 Oct - Mon, 27 Oct
SEA
Seattle
ONT
Ontario
฿15,625 Return, found 1 day ago
฿15,625
Return
found 1 day ago

Fri, 14 Nov - Sun, 16 Nov
SEA
Seattle
ONT
Ontario
฿17,355 Return, found 5 days ago
฿17,355
Return
found 5 days ago
Find the cheapest month to fly from Seattle (SEA) to Ontario (ONT)
November is typically the cheapest month to fly
From ฿2,563 - ฿7,498 per traveller.
Frequently asked questions
Travel information
Origin airport | Seattle - Tacoma Intl. |
---|---|
Destination airport | Los Angeles - Ontario Intl. |
Return price | ฿5,815 |
Distance | 1530 km |
Average flight time | 2 hours 41 mins |
Book with confidence
Perfect flights from Seattle to Ontario
Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Seattle to Ontario. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
Our flexible Seattle - Tacoma Intl. to Los Angeles - Ontario Intl. ticket options cater to your travel preferences, with incredible one-way fares from ฿3,910 and roundtrip prices from ฿5,815. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Los Angeles - Ontario Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Ontario.
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Top Routes from Seattle
- Seattle to Bangkok (SEA - BKK)
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Top Routes to Ontario
Top Routes from Seattle
Top Flight Destinations
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Ontario Airports
Seattle Airports
Seattle Paine Field Intl. Airport
Nearby Airports
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