Question 1

What days are direct flights available from Seattle to Ontario?

Accepted Answer

Direct flights can be found on the following days: Monday, Tuesday, Wednesday, Friday, Saturday.

Question 2

How popular is this Seattle to Ontario flight route?

Accepted Answer

Within the past month, 12 users have taken a look at flights from Seattle/Tacoma Intl to Ontario.

Question 3

How many flights depart from Seattle to Ontario on average per day?

Accepted Answer

Per day, 19 flights depart from Seattle to Ontario on average.
Early Morning (Midnight to 6am) - 5% of flight departures
Morning (6am - Midday) - 16% of flight departures
Afternoon (Noon - 6pm) - 79% of flight departures

Question 4

How long is the flight from Seattle to Ontario?

Accepted Answer

For as low as C$ 80, Frontier can have you in Ontario from Seattle in 2h 35m. Seattle and Ontario are separated by a distance of 1548 km. All flights are typically direct.

Question 5

What are the cheapest airlines flying from Seattle to Ontario round-trip?

Accepted Answer

Cheapflights users have booked flights from Seattle to Ontario round-trip from C$ 80. Other airlines that can offer you cheap pricing are Alaska Airlines, from C$ 214, and Delta, from C$ 227. Frontier is currently priced 72% below the average price you’ll pay for this route.

Question 6

What are the cheapest airlines to fly from Seattle to Ontario one-way?

Accepted Answer

C$ 108 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Alaska Airlines and Frontier, with prices starting from C$ 148 and C$ 241, respectively.

Question 7

When is the best time to book a flight from Seattle to Ontario?

Accepted Answer

Currently, September is the cheapest month in which you can book a flight from Seattle to Ontario (average of C$ 243). Flying from Seattle to Ontario in May is currently the most expensive (average of C$ 551). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

C$ 412

February

C$ 467

March

C$ 565

April

C$ 437

May

C$ 750

June

C$ 536

July

C$ 600

August

C$ 680

September

C$ 331

October

C$ 516

November

C$ 652

December

C$ 520

Question 8

When is the best time to book a flight from Seattle to Ontario?

Accepted Answer

Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 9

When is the cheapest time to fly from Seattle to Ontario?

Accepted Answer

Travelers seeking maximum savings on their Seattle to Ontario flight should consider departing on Tuesday at noon when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 10

How recently were the Seattle to Ontario flight deals updated?

Accepted Answer

The Seattle to Ontario flight deals you see on this page were last updated on 19/5.

Question 11

What are the most popular airlines that fly from Seattle to Ontario?

Accepted Answer

Consider Alaska Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from Seattle to Ontario.

Question 12

What are the cheapest flights from Seattle to Ontario?

Accepted Answer

Looking for the cheapest flight from Seattle to Ontario? While on average our users pay C$ 151, our data indicates the cheapest price to be C$ 79. The most popular route (Seattle/Tacoma Intl - Ontario), is priced around C$ 167.

Question 13

What are the most reliable airlines from Seattle to Ontario?

Accepted Answer

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Ontario on time: China Airlines (100%), Aeromexico (100%), WestJet (97%).

Question 14

Can I find flights from Seattle to Ontario for under C$ 100 on Cheapflights?

Accepted Answer

Yes, there are multiple flights from Seattle to Ontario for under C$ 100. The cheapest flight booked recently is on Frontier for just C$ 80, but on average you can expect to pay C$ 161.

Question 15

Are there direct flights from Seattle to Ontario for under C$ 100 on Cheapflights?

Accepted Answer

Cheapflights has 20 direct flights from Seattle to Ontario under C$ 100. A good price for a direct flight from Seattle to Ontario is less than C$ 165.

Question 16

Are there last-minute flights available from Seattle to Ontario for under C$ 700?

Accepted Answer

There are currently 6+ open flights from Seattle to Ontario within the next 7 days for less than C$ 700.

Question 17

What is the cheapest day to fly round-trip from Seattle to Ontario?

Accepted Answer

Wednesday flights are generally found to be more expensive for flights from Seattle to Ontario. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Ontario.

Question 18

How far in advance should I book a flight from Seattle to Ontario?

Accepted Answer

To save on the cost of your flight from Seattle to Ontario, book at least 31 days before your planned departure. Booking around this time can save you about 82% on the cost of this flight compared to booking a flight leaving this week. We have found prices from C$ 376 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as C$ 525.

Question 19

What is the cheapest month to fly from Seattle to Ontario?

Accepted Answer

September can be a great time to fly to Ontario from Seattle with a flight ticket averaging about C$ 308. Cheapflights users have found deals in the month of September for as cheap as C$ 94. The most expensive prices can be found in the month of March.

Question 20

When is the cheapest time to fly from Seattle to Ontario (SEA - ONT)?

Accepted Answer

One of the essential ways to save on airfare from Seattle to Ontario is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 52% on airfare.

Question 21

What airports do I use to fly from Seattle to Ontario?

Accepted Answer

To fly from Seattle to Ontario, you need to book a flight from Seattle/Tacoma Intl (SEA) to Ontario (ONT). Nonstop flights to Ontario from Seattle/Tacoma Intl take 2h 32m on average. When it comes time to book airfare, you have a few options: there are 13 outbound flights from Seattle/Tacoma Intl to Ontario offered by 3 different airlines.

Question 22

What does SEA to ONT mean?

Accepted Answer

This is defined as Seattle/Tacoma Intl Airport (SEA) and Ontario Airport (ONT). Codes like Ontario Airport are often used to just call airports uniquely.

Question 23

Can I find deals for flights from Seattle to Ontario that include extra baggage allowance?

Accepted Answer

The amount of baggage you can bring on your Seattle to Ontario flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

Question 24

Can I find deals on flights from Seattle to Ontario with specific airlines?

Accepted Answer

Yes, Cheapflights allows you to browse and filter Seattle to Ontario flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

Question 25

Can I find deals for flights from Seattle to Ontario that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Seattle to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

Question 26

How can I find direct flights from Seattle to Ontario?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Ontario.

Question 27

Can I find deals for business class flights from Seattle to Ontario?

Accepted Answer

Yes. Cheapflights offers flight deals from Seattle to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 28

Can I find deals for flights from Seattle to Ontario that allow pets onboard?

Accepted Answer

Many airlines flying from Seattle to Ontario offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

Question 29

Can I find deals on last-minute flights from Seattle to Ontario?

Accepted Answer

Yes, you can often find last-minute deals on Seattle to Ontario flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

Question 30

How does Cheapflights help users find flights from Seattle to Ontario?

Accepted Answer

When you search for this flight from Seattle to Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Question 31

Why should you use Cheapflights to find cheap flight tickets from Seattle to Ontario?

Accepted Answer

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Ontario.

Question 32

Can Cheapflights find flights from Seattle to Ontario with no change fees?

Accepted Answer

Yes! Cheapflights helps users easily find flights from Seattle to Ontario with no change fees.

Question 33

Can Cheapflights notify me if prices for flights from Seattle to Ontario become cheaper?

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Popular in	December
Cheapest in	September
Round-trip from	C$ 339
One-way from	C$ 241

Airline	Cheapest	Average	Flexibility	On-time
Frontier	CheapestC$ 66	AverageC$ 152	FlexibilityNo cancel fee	On-time62%	Search Frontier flights
Alaska Airlines	CheapestC$ 160	AverageC$ 270	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights
Delta	CheapestC$ 175	AverageC$ 284	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

1%of flight departures	Early morningMidnight to 6 am
26%of flight departures	Morning6 am to noon
45%of flight departures	AfternoonNoon to 6 pm
28%of flight departures	Evening6 pm to midnight

Sunday	15daily flights
Monday	16daily flights
Tuesday	11daily flights
Wednesday	10daily flights
Thursday	14daily flights
Friday	16daily flights
Saturday	13daily flights

Cheap flights from Seattle to Ontario from C$ 80

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

The best prices from Seattle/Tacoma Intl to Ontario are usually found in September or October, booked 52 days in advance, depart on a Monday or Tuesday and return on a Tuesday

Cheap flight deals from Seattle to Ontario

Popular in

Cheapest in

Round-trip from

One-way from

What is the cheapest day to fly round-trip from Seattle to Ontario?

How far in advance should I book a flight from Seattle to Ontario?

What is the cheapest month to fly from Seattle to Ontario?

When is the cheapest time to fly from Seattle to Ontario (SEA - ONT)?

Cheap Frontier flights from Seattle to Ontario

Peruse some of the lowest-priced Frontier flights we've found from Seattle to Ontario. Come back soon if you're not finding the exact deal you're looking for.

Cheap Alaska Airlines flights from Seattle to Ontario

Some of the lowest-priced Alaska Airlines flights we've found at this time heading from Seattle to Ontario. Ensure the flight price, dates, time, and airline match your criteria before you book.

Cheap Seattle to Ontario flights in May & June 2024

Find cheap flight options from Seattle to Ontario specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 406,380 searches. Prices were last updated on 20 May 2024.

Scroll through some of the best deals on flights from Seattle to Ontario in 2024. For more flight deals, be sure to check back very soon.

Seattle to Ontario 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Ontario in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 406,380 searches. Data last updated 20 May 2024.

Scroll through some of the best deals on flights from Seattle to Ontario in 2024. For more flight deals, be sure to check back very soon.

Direct flights to Ontario from Seattle

Take a look at some of the direct flights travelling from Seattle to Ontario in the near future. Search for alternative flights from Seattle to Ontario by utilizing the search form above.

Seattle to Ontario flights leaving soon

Users seeking a last-minute flight from Seattle to Ontario should consider booking one of these fares. Users should be sure to double check the price, date, and time of their last-minute flight.

One-way flights to Ontario from Seattle

Take a look at some of the best available options we've come across on one-way flights from Seattle to Ontario. Users needing a return flight from Seattle to Ontario should utilize the search form above.

Find flights from Seattle to Ontario within your budget

When is the best time to book a flight from Seattle to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Ontario. Price data was last updated on 10 May 2024.

Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

When is the cheapest time to fly from Seattle to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Ontario. Price data was last updated on 19 May 2024.

Average price of flights to Ontario by month

Plan your trip from Seattle to Ontario by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to Ontario is currently C$ 164 while a round-trip flight costs C$ 155. Price data was last updated on 12 May 2024.

Temperature and rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average temperature and rainfall totals by month.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 20 May 2024.

Read reviews from past customers who have flown Frontier, Alaska Airlines and Delta from Seattle to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airports do I use to fly from Seattle to Ontario?

Can I find flights from Seattle to Ontario for under C$ 100 on Cheapflights?

Are there direct flights from Seattle to Ontario for under C$ 100 on Cheapflights?

Are there last-minute flights available from Seattle to Ontario for under C$ 700?

What days are direct flights available from Seattle to Ontario?

How popular is this Seattle to Ontario flight route?

How many flights depart from Seattle to Ontario on average per day?

How long is the flight from Seattle to Ontario?

What are the cheapest airlines flying from Seattle to Ontario round-trip?

What are the cheapest airlines to fly from Seattle to Ontario one-way?

What are the most popular airlines that fly from Seattle to Ontario?

What are the most reliable airlines from Seattle to Ontario?

What are the cheapest flights from Seattle to Ontario?

What does SEA to ONT mean?

Can I find deals for flights from Seattle to Ontario that include extra baggage allowance?

Can I find deals on flights from Seattle to Ontario with specific airlines?

Can I find deals for flights from Seattle to Ontario that include hotel bookings?

How can I find direct flights from Seattle to Ontario?

Can I find deals for business class flights from Seattle to Ontario?

Can I find deals for flights from Seattle to Ontario that allow pets onboard?

Can I find deals on last-minute flights from Seattle to Ontario?

How recently were the Seattle to Ontario flight deals updated?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to OntarioSee prices for flight routes from nearby airports that may be better suited for you.

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Seattle to Ontario

Popular flight searches

Check out other popular destinations found by fellow travellers in 2024

Search flights from Seattle to Ontario by cabin class

Find flights from Seattle to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Hourly flight availability from Seattle to Ontario

Find hourly flight availability from Seattle to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 May 2024.

Weekly flight availability from Seattle to Ontario

Explore weekly flight availability from Seattle to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 20 May 2024.

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations

Alternative routes for Seattle to Ontario
See prices for flight routes from nearby airports that may be better suited for you.