Cheap flights from Seattle to Ontario from $82
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Ontario departing on 3/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Round-trip
1 adult
Economy
0 bags
Deals available from 900+ travel sites.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Seattle to Ontario
Cheap round-trip flights
These are some of the best round-trip flight deals from Seattle to Ontario that have been recently found on momondo from popular airlines, departing in the coming months.
Cheap one-way flights
Flying one-way? These are some of the best deals recently discovered on momondo for flights from Seattle to Ontario.
Cheap last minute flights
Planning a quick getaway from Seattle to Ontario? These are the last-minute flight deals available now.
Cheap direct flights
If you prefer a non-stop journey, check out our latest direct flight deals to Ontario, so you can enjoy a seamless trip without layovers.
Cheap bus & train deals from Seattle to Ontario
Find recent round-trip train or bus tickets from Seattle to Ontario.
All round-trip flight deals from Seattle to Ontario
The cheapest plane tickets from Seattle to Ontario found on KAYAK recently.
Air Canada flights from Seattle to Region of Ontario
Our best Air Canada deals on Seattle to Region of Ontario flight tickets
Air Canada![Air Canada]()
Mar 5![Air Canada]()
Mar 12
SEA6:05 amSeattle/Tacoma Intl
4h 45m
YYZ1:50 pmToronto Pearson Intl
YYZ7:05 pmToronto Pearson Intl
5h 25m
SEA9:30 pmSeattle/Tacoma Intl
Air Canada![Air Canada]()
Mar 5![Air Canada]()
Mar 12
SEA6:05 amSeattle/Tacoma Intl
4h 45m
YYZ1:50 pmToronto Pearson Intl
YYZ7:05 pmToronto Pearson Intl
5h 25m
SEA9:30 pmSeattle/Tacoma Intl
United Airlines flights from Seattle to Region of Ontario
Our best United Airlines deals on Seattle to Region of Ontario flight tickets
United Airlines![United Airlines]()
Mar 4![United Airlines]()
Mar 11
SEA8:10 amSeattle/Tacoma Intl
12h 36m
1 stop
YYZ11:46 pmToronto Pearson Intl
YYZ7:05 pmToronto Pearson Intl
5h 25m
SEA9:30 pmSeattle/Tacoma Intl
United Airlines![United Airlines]()
Mar 4![United Airlines]()
Mar 11
SEA6:05 amSeattle/Tacoma Intl
4h 45m
YYZ1:50 pmToronto Pearson Intl
YYZ12:25 pmToronto Pearson Intl
12h 35m
2 stops
SEA10:00 pmSeattle/Tacoma Intl
See travel insights to Ontario from
How to get the cheapest flight ticket from Seattle to Region of Ontario
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
Prices
Airlines
Other information
What is the cheapest month to fly to Region of Ontario?
The month of January is, on average, the cheapest month to fly to Region of Ontario from Seattle, with most prices found around $321. If you aren’t able to travel during the month of January, then book flights to Region of Ontario from Seattle during September instead. Flights to Region of Ontario in September, while not as cheap as those in January, still average around $408.
What is the cheapest day to depart on your flight to Region of Ontario?
According to our data, Thursday is the cheapest day to fly to Region of Ontario from Seattle. The lowest ticket price found for a Thursday departure recently was $635. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Seattle to Region of Ontario on a Sunday will generally be more expensive and average around $808. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Region of Ontario?
According to our data, the cheapest time of day to fly to Region of Ontario is in the afternoon. momondo users have found flights departing from Seattle to Region of Ontario in the afternoon for as low as $283. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $693.
What is the cheapest Seattle/Tacoma Intl to Ontario flight route?
Fly from Seattle/Tacoma Intl to Toronto Pearson Intl for the best Seattle/Tacoma Intl - Ontario flight prices
How far in advance should I book a flight to Region of Ontario?
You are more likely to see cheaper flights to Region of Ontario from Seattle when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $498 when searching 17 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from Seattle for as low as $377 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to Ontario flights?
There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Ontario?
Alaska Airlines, WestJet, and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Ontario
What airlines fly to Region of Ontario?
Air Canada, Alaska Airlines and WestJet are the top three most popular airlines that fly to Region of Ontario from Seattle according to our data. Air Canada is the first choice among our users, with 44% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 6 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.
How many flights depart from Seattle to Region of Ontario on average per day?
The number of flights available between Seattle and Region of Ontario is 4 per day as of January 2025. The most frequent departure time is 7:00AM, with 100% of daily flights leaving at noon.
How many flights depart from Seattle to Region of Ontario on average per week?
30 flights are operational weekly from Seattle to Region of Ontario as of January 2025. The most popular departure day for this route is Wed, with 17% of flights per week taking off on this day.
Cheap Seattle to Region of Ontario flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Region of Ontario
Best Price Found | $82 |
|---|---|
Fastest flight time | 4h 37m |
Direct flights | Every day |
Airports in Region of Ontario | 5 airports |
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Ontario?
Prices for flights from Seattle/Tacoma Intl Airport to Ontario are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Ontario?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Ontario is 6 as of January 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Ontario?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Ontario.
What documentation or ID do you need to fly to Ontario?
The travel and health documents you'll need for your trip to Ontario may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Region of Ontario?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Region of Ontario is Airbus A220-300, representing 32.11% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 20.00%, Airbus A320-100/200 at 18.42%, and Boeing 737-900 Passenger/BBJ3 (winglets) at 4.47%.
Best airlines flying from Seattle to Region of Ontario
Compare and see reviews for airlines that fly from Seattle to Region of Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $169 | Free Cancellation | Rating 7.0 8,635 reviews | |||
| PriceFrom $172 | Free Cancellation | Rating 7.4 8,971 reviews | |||
| PriceFrom $235 | Free Cancellation | Rating 7.2 2,828 reviews | |||
| PriceFrom $248 | Free Cancellation | Rating 8.0 9,699 reviews | |||
| PriceFrom $464 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $490 | Free Cancellation | Rating 8.0 8,508 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Seattle to Ontario?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Ontario. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Seattle to Ontario with flexible booking policies on momondo?
Yes. All flights to Ontario from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Seattle to Ontario?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from Seattle.
I’m not ready to book a flight from Seattle to Ontario right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Seattle to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.
Get notified when prices go down
Daily price changes in your inbox - only with Price Alerts.
From?
To?
Email me momondo's favorite deals
By creating a price alert you accept our terms of use and privacy policy.
Find better results for your trip to Ontario
Popular cities in Ontario
Popular flights according to clicks in the last 7 days on momondo
Flights to Torontofrom $93
Flights to Vancouverfrom $80
Flights to Montrealfrom $99
Flights to Calgaryfrom $77
Flights to Ottawafrom $162
Flights to Halifaxfrom $151
Flights to Winnipegfrom $176
Flights to Québec Cityfrom $265
Flights to Saskatoonfrom $186
Flights to Kelownafrom $141
Flights to Reginafrom $195
Flights to St. John'sfrom $234