
Book Cheap Alaska Airlines flight from Ontario (ONT) to Seattle (SEA) from CA $151
Find The Best Day to Book a Cheap Alaska Airlines Flights From Ontario to Seattle
Cheapest Alaska Airlines Flights from Ontario (ONT) to Seattle (SEA)
The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were CA $199 round trip and CA $151 one way. Prices and availability subject to change. Additional terms may apply.
Frequently asked questions
Grab a great Alaska Airlines flight from ONT to SEA
To find a great deal on Alaska Airlines flights with Travelocity, simply enter your origin and destination airports, pick your travel dates, and hit search. From here, you can sort by price, flight duration, and arrival/departure time. You can also filter to find nonstop flights.
Flying Alaska Airlines Los Angeles to Seattle gives you fights to choose from. With that direct flight time of , you’ll be touching down before you know it.
Find cheap flights with Alaska Airlines between Los Angeles and Seattle
Alaska Airlines has a range of great fares on stacks of flights, and to find the most affordable for you, there are a few tricks you can try. Booking in advance, for example, is a great way to grab a fantastic deal. Also, choose the cheapest month, if you can. One-way flights from Los Angeles to Seattle with Alaska Airlines are May.
The more flexible you are, the more affordable flights you’re likely to find. Consider one-way flights and connecting flights, as well as standard roundtrip and direct options. Even if you’re flying today, cheap last-minute flights are easy to find by entering your travel dates and hitting search.
Reasons to book your Alaska Airlines flights with Travelocity
Travelocity makes it easy to book a seat, anywhere in the world. The vast inventory, fast search, and advanced filters put some of the best deals on the planet in one place. Whether you’re traveling on business, with friends, family, or on your own, take your pick from some fantastic options. And with free cancellation and pay later options, you can travel more and worry less.
Airport code | Country | Airport name | Number of flights |
|---|---|---|---|
| SEA | USA | Seattle - Tacoma Intl. | 115 |
| ORD | USA | O'Hare Intl. | 44 |
| LAX | USA | Los Angeles Intl. | 24 |
| PDX | USA | Portland Intl. | 23 |
| ANC | USA | Ted Stevens Anchorage Intl. | 22 |
| SFO | USA | San Francisco Intl. | 21 |
| SAN | USA | San Diego Intl. | 18 |
| JNU | USA | Juneau Intl. | 10 |
| SJC | USA | Norman Y. Mineta San Jose Intl. | 10 |
| GEG | USA | Spokane Intl. | 7 |
Travelers ❤️ these 🏨 after their flight to Seattle

DoubleTree by Hilton Seattle Airport
Staff doesn’t tell you about the stairs up and down if you’re located in a wing room.
Reviewed on Mar 24, 2026

Coast Gateway Hotel
This property is close to the airport but surprisingly quiet. Room was a touch dated but had everything needed for an overnight stay. Shuttle service was great
Reviewed on Mar 25, 2026

Country Inn & Suites by Radisson, Seattle-Tacoma International Airport, WA
Great hotel for night-before-flight sleepover. Comfortable and clean and helpful staff. My shuttle left prior to breakfast being served but i appreciated the to-go bag. I've booked ahead for a flight next month!
Reviewed on Mar 25, 2026
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