Seattle to Ontario Flight Route Information
| Travel Distance: | 957 Miles |
|---|---|
| Airlines Flying This Route: | Alaska Airlines, Southwest Airlines, Japan Airlines |
| Weekly Flights: | 40 |
| Avg. Flight Duration: | 02.39 Hours |
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9/26/2026 Find Cheap Flights from Seattle to Ontario (SEA to ONT)
SEA - Seattle LAX - Los Angeles 
Find Cheap Flights from Seattle to Ontario (SEA to ONT)
Fares Starting from $86
SEA - Seattle LAX - Los Angeles Great deal! This is the lowest price we've seen for this one way route in the last 12 hours. Prices may change and aren't guaranteed for all flights or dates. Click on the price to continue your search and check the latest available fare. Ref. id 202609~Ref:dmbO09oqHkK4mbpagQoa8Q
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Cheap Flights from Seattle to Ontario - Compare & Book Our Best Deals
With over 5 daily departures from Seattle to Ontario, this route offers great flexibility for different travel plans. Browse one-way fares from $85.98, round-trip fares from $186.61, and other affordable options across different budgets. Compare flight choices, explore schedules, and book the best Seattle to Ontario deals that fit your budget and travel preferences.
Top Airlines that fly from Seattle to Ontario
Cheap Flight Deals from Seattle to Ontario
SEA Seattle Sat, Sep 26
LAX Los Angeles
from $86
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SEA Seattle Sat, Dec 5
LAX Los Angeles
from $92
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SEA Seattle Wed, Dec 2
LAX Los Angeles
from $92
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SEA Seattle Sun, Oct 25
LAX Los Angeles
from $102
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SEA Seattle Thu, Oct 29
LAX Los Angeles
from $102
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SEA Seattle Sun, Nov 1
LAX Los Angeles
from $102
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SEA Seattle Mon, Nov 23
LAX Los Angeles
from $102
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SEA Seattle Mon, Dec 7
LAX Los Angeles
from $102
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SEA Seattle Thu, Nov 26
LAX Los Angeles
from $113
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SEA Seattle Thu, Oct 15
LAX Los Angeles
from $147
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*All fares above were last found on: Fares are one way/round trip. Fares incl. all fuel surcharges, taxes & fees and our service fees. Displayed fares are subject to change and cannot be guaranteed at the time of booking. See all booking terms and conditions. 202609~Ref:dmbO09oqHkK4mbpagQoa8Q
Insights about cheap flights from Seattle to Ontario – Direct Flights, Duration & Best Travel Time
When it comes to booking cheap flights, having the right information at your fingertips can make all the difference. Dive into the insights for cheap flights from Seattle to Ontario and enhance your travel experience!
Daily Flights
5
Cheapest Month
April
Avg. Flight Duration
02.39
Peak Season
November
Distance
957 miles
Direct Flights
161
When is the Cheapest Time to Book Flights from SEA to ONT?
Explore data-powered insights and trends for flights from Seattle to Ontario. Discover average fares, cheap months to fly, when to book, and plan smarter.
What’s the cheapest day of the week to fly from Seattle to Ontario?‡
What is the cheapest month to fly from Seattle to Ontario?‡
‡This information is based on historical data from the last 365 days.
Finding Affordable Flights from Seattle to Ontario
- Plan Ahead - One of the keys to securing cheap flights from Seattle to Ontario is to plan your trip well in advance. Airlines often offer lower prices for those who book tickets months ahead. Keep an eye on special promotions and sales events, which can yield significant savings.
- Flexibility is Key - Being flexible with your travel dates can also lead to substantial cost savings. Consider flying during off-peak seasons or on weekdays when prices tend to be lower.
- Set Price Alerts - To keep tabs on flight prices, consider setting up fare alerts. These alerts will notify you when fares from Seattle to Ontario drop, giving you the opportunity to grab cheap deals.
- Consider Nearby Airports - If Ontario has multiple airports, check the prices at each one. Sometimes, flying into a nearby airport and then taking a short train or bus ride to your destination can be a much cheaper option.
- Bundle and Save - Booking your flight and accommodation together as a package can often result in significant savings. CheapOair offers these bundled deals, so make sure to explore this option.
When should I book flights from SEA to ONT? ‡
‡Got flexible travel dates? Use our flight data from the past year to discover ideal time to fly from Seattle to Ontario. Find out which months and days typically offer lower fares and let CheapOair search for the best options.
CheapOair provides the predicted prices for one-way trips or round-trips with a duration of 7 days for domestic and 14 days for international trips based on historical data and available flight information. Graphs are estimates only. Prices are subject to change and can't be guaranteed until ticketed.
Estimated price for
Round-trip
‡Graphs are estimates only. Based on historical data and available flight information. Prices are subject to change and cannot be guaranteed until ticketed.
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Insights About Flying from Seattle to Ontario
Which is the high season to travel from Seattle to Ontario?
The month of November is considered the high season for flying from SEA to ONT. Traveling during the high season can affect ticket prices and availability, making this data crucial for trip planning.
How many direct flights are available from SEA to ONT?
There are a total of 161 direct flights from Seattle to Ontario. For travelers seeking convenience and shorter travel times, this data is important when choosing flight options.
Which is the low season to travel from Seattle to Ontario?
April is considered the low season for traveling from Seattle to Ontario, California. Travelers looking for cost-effective options and fewer crowds may consider traveling during this period.
How many daily flights are there between Seattle to Ontario?
There are as many as 5 daily flights available for travelers between SEA to ONT. This data offers flexibility in choosing departure times that best suit your schedule.
Which is the busiest day for passengers flying between Seattle to Ontario?
Monday are the busiest days for passengers flying between Seattle to Ontario. Knowing the peak travel day can help you plan your trip to avoid overcrowded flights or airports.
At what time does the last flight depart to Ontario?
The last flight to Ontario typically departs between 9:00PM - 10:00PM. Travelers who prefer late-night departures will find this information valuable for planning their journey.
What percentage of travelers spent an average of 3 days in Ontario, California?
Approximately 31.11% of travelers spent an average of 3 days exploring Ontario. This information can assist in planning the duration of your stay in Ontario
What percentage of SEA to ONT flyers traveled with kids under 14?
About 6% of passengers on flights from Seattle to Ontario were accompanied by children under the age of 14. This information is useful if you're planning a family trip and want to know how common it is to travel with young children on this route.
What percentage of Seattle to Ontario travelers were over 60 years old?
A notable 23% of travelers were aged 60 or older. This statistic provides insights for senior travelers or those seeking a mature travel demographic.
What percentage of SEA to ONT travelers were millennials?
Millennials make up a significant portion of travelers on this route, accounting for 31% of all passengers. If you're a millennial looking to connect with like-minded travelers, this statistic might interest you.
What percentage of Seattle to Ontario travelers were female?
Almost half of the passengers, approximately 58% were female. Knowing the gender distribution can be useful for solo female travelers or those interested in gender-related travel insights.
What percent of Seattle to Ontario travellers booked first or business class?
2% of travelers booked first or business class on this route.
At what time the earliest flight departs from Seattle?
The earliest flight departs at 6:00AM - 7:00AM.
Which is the most popular airport for connecting flights between Seattle to Ontario?
Oakland International Airport is the most popular airport for connecting flights between SEA to ONT.
On which days one can have the most flight options in Ontario?
Monday offer the most flight options in Ontario.
§
All flight facts are based on last 3 months' data except the highest and lowest booking months that are based on last 3 months' data.
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Cheap Flights from Seattle to Ontario
Looking for flights from Seattle to Ontario? Look no more, for you're at the right place. Book cheap flights from Seattle to Ontario on CheapOair and enjoy great discounts. Whether its leisure or a business trip, we offer the most competitive rates on flight tickets to destinations around the world. Grab SEA to ONT flight deals on CheapOair and save big!
Airports in Seattle
Seattle-Tacoma International Airport is a primary international airport serving the city of Seattle, Washington, U.S.A. It is situated approximately 21 kilometers away from Downtown Seattle. This public airport is owned & managed by Port of Seattle. The airport is a hub for Alaska Airlines, Delta Air Lines, and Horizon Air. It offers passenger & cargo services to both domestic & international destinations. These are Vancouver, Tokyo, Seoul, Victoria, Taipei, Amsterdam, Dubai, Anchorage, San Francisco, Portland, and more. Buses, shuttles, public transit, rental cars, taxis, limos, Uber, Lyft, Wingz, and more.
Explore Ontario
Ontario is a city situated in San Bernardino County of California, U.S.A. Lying towards the east of Los Angeles County, the city is a part of the Greater Los Angeles Area. The city is home to Ontario Mills. Situated within the city are several attractions which enable visitors to learn about its art, music, and history. Some of these include CCAA Museum of Art, Discovery Science Center, Fox Performing Arts Center, Barnum & Bailey Circus, and more. The outdoor enthusiasts can head to the Cucamonga-Guasti Regional Park. Here one can indulge in various activities including fishing and swimming.
Things to Do in Ontario
Chaffey Community Museum of Art (CCMA)
The CCMA is one of the oldest organisations in the region. It is dedicated to stimulating and fostering an interest in the California School of artists as well as other local artists from the Inland Empire Community. CCMA is a unique organization in that we maintain a museum collection and display the work of current artists who are well known in the region or nationally. We are an association of people who enjoy quality art and artists.
Museum of History & Art, Ontario
The purpose of the Museum of History and Art, Ontario is to promote knowledge and understanding of the history, art, and cultural traditions of the greater Ontario area in a broad context. The Museum will serve and enrich the community by collecting, preserving, and interpreting the history of Ontario and its region through exhibitions, educational programs, lectures, publications and other community events.
Cucamonga-Guasti Regional Park
Located in Ontario, CA where business and culture meet, Cucamonga-Guasti Regional Park provides 150 acres of outdoor recreation activities in an urban setting. Enjoy a wide range of activities including two lakes for fishing, a swim complex with water slides, zero depth water play park, picnic tables and group picnic shelters for corporate events, large parties and family reunions.
Best Time to Fly to Ontario
The months from June-August are best to visit the city. The weather during these months is very comfortable and quite warm. However, this is also the busiest season and therefore you may find inflated prices.
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