Featured Airlines
- Be in the knowGet alerts if flight prices drop or rise*
- Book smarterSave up to 40% on select hotels after you book a flight*
Plan, book, fly with confidence
Cheap Flights from Seattle to Ontario (SEA-ONT)
Prices were available within the past 7 days and start at S$107 for one-way flights and S$239 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Fri, 26 Jul - Wed, 7 Aug
SEA
Seattle
ONT
Ontario
S$239 Return, found 2 days ago
S$239
Return
found 2 days ago
Fri, 5 Jul - Tue, 16 Jul
SEA
Seattle
ONT
Ontario
S$240 Return, found 1 hour ago
S$240
Return
found 1 hour ago
Sun, 30 Jun - Tue, 16 Jul
SEA
Seattle
ONT
Ontario
S$267 Return, found 1 hour ago
S$267
Return
found 1 hour ago
Sat, 29 Jun - Sat, 20 Jul
SEA
Seattle
ONT
Ontario
S$274 Return, found 1 hour ago
S$274
Return
found 1 hour ago
Sun, 30 Jun - Sat, 20 Jul
SEA
Seattle
ONT
Ontario
S$294 Return, found 1 hour ago
S$294
Return
found 1 hour ago
Tue, 18 Jun - Tue, 2 Jul
SEA
Seattle
ONT
Ontario
S$307 Return, found 2 days ago
S$307
Return
found 2 days ago
Wed, 19 Jun - Tue, 2 Jul
SEA
Seattle
ONT
Ontario
S$308 Return, found 1 hour ago
S$308
Return
found 1 hour ago
Mon, 17 Jun - Tue, 2 Jul
SEA
Seattle
ONT
Ontario
S$335 Return, found 1 hour ago
S$335
Return
found 1 hour ago
Thu, 13 Jun - Mon, 24 Jun
SEA
Seattle
ONT
Ontario
S$361 Return, found 2 days ago
S$361
Return
found 2 days ago
Wed, 19 Jun - Sat, 6 Jul
SEA
Seattle
ONT
Ontario
S$376 Return, found 1 hour ago
S$376
Return
found 1 hour ago
Origin airport | Seattle - Tacoma Intl. |
Destination airport | Los Angeles - Ontario Intl. |
Return price | S$239 |
Distance | 1530 km |
Perfect flights from Seattle to Ontario
Your Journey from Seattle to Ontario
Start your unforgettable journey with Expedia. Our broad selection of flights from Seattle to Ontario caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
Choosing Your Ideal Flight
With Expedia, you have access to a wide range of airlines, including Delta, United. Our selection of flights from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl. caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
Maximizing Value with Seattle to Ontario Flights
Experience the joy of finding cheap flights from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$107 and roundtrip prices from S$239*.
Pre-Flight Essentials
Ensure a smooth journey from Seattle to Ontario with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
Experience the Vibrant Ontario
Picture yourself stepping off the plane in Ontario and immersing yourself in the unique atmosphere of Los Angeles. From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
Added Convenience on Your Seattle to Ontario Flight
Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Seattle to Ontario.
Beyond the Flight – Exploring Ontario
With Expedia, your adventure extends beyond the flight. Explore Ontario at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
Book Your Flight from Seattle to Ontario with Confidence
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Seattle to Ontario with confidence. Book your travel arrangements with Expedia today.
*Note: Prices may vary based on availability and are subject to change.
Frequently asked questions
- Trending Routes
- Trending Flights
- Top Flights Destinations
- More Carriers
- Nearby Airports
- Cheap Flights from Other Airports
- Expedia's Latest Trends
Popular flights from Seattle
- Seattle to Chicago (SEA - ORD)
- Seattle to Newark (SEA - EWR)
- Seattle to Cebu (SEA - CEB)
- Seattle to Hong Kong (SEA - HKG)
- Seattle to New York (SEA - LGA)
- Seattle to Taipei (SEA - TPE)
- Seattle to Manila (SEA - MNL)
- Seattle to Denver (SEA - DEN)
- Seattle to New York (SEA - JFK)
- Seattle to Montreal (SEA - YUL)
- Seattle to Vancouver (SEA - YVR)
- Seattle to London (SEA - LHR)
Popular flights from Seattle
Top Flight Destinations Near Here
- Flights to Las Vegas
- Flights to New York
- Flights to Orlando
- Flights to Panama City Beach
- Flights to Chicago
- Flights to Myrtle Beach
- Flights to San Diego
- Flights to Los Angeles
- Flights to Destin
- Flights to Miami
- Flights to Nashville
- Flights to Boston
- Flights to Houston
- Flights to San Francisco
- Flights to Honolulu
- Flights to Key West
- Flights to New Orleans
- Flights to Atlanta
- Flights to Seattle
- Flights to San Antonio
Ontario Airports
Los Angeles
S$212.00
Orange County
S$280.80
Burbank
S$527.90
Flights
San Francisco to Grand Canyon (SFO - GCN)Los Angeles to Baltimore (LAX - BWI)Boston to San Francisco (BOS - SFO)Kelowna to Los Angeles (YLW - LAX)San Francisco to Los Angeles (SFO - LAX)Singapore to Philadelphia (SIN - PHL)San Francisco to Vancouver (SFO - YVR)San Francisco to Chicago (SFO - ORD)San Francisco to New York (SFO - JFK)San Diego to Las Vegas (SAN - LAS)Los Angeles to Honolulu (LAX - HNL)Boston to Singapore (BOS - SIN)Los Angeles to San Francisco (LAX - SFO)Newark to San Francisco (EWR - SFO)New York to Cancun (NYC - CUN)Singapore to Los Angeles (SIN - LAX)Singapore to Boston (SIN - BOS)San Francisco to Las Vegas (SFO - LAS)Singapore to Dallas (SIN - DFW)San Francisco to Seattle (SFO - SEA)Pittsburgh to Newark (PIT - EWR)Los Angeles to Singapore (LAX - SIN)San Francisco to Singapore (SFO - SIN)Los Angeles to Las Vegas (LAX - LAS)Singapore to San Francisco (SIN - SFO)Los Angeles to New York (LAX - NYC)Phoenix to Los Angeles (PHX - LAX)Singapore to San Diego (SIN - SAN)Singapore to Las Vegas (SIN - LAS)Singapore to Cleveland (SIN - CLE)
*Available to Expedia members.