Cheap flights from Ontario to Seattle from $35
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Seattle departing on 5/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Ontario to Seattle by changing tabs
Find the cheapest one-way flights from Ontario to Seattle
If you're looking for one-way flights from Ontario to Seattle, view some of our deals below provided by Alaska Airlines and Frontier
Search last-minute flights to Seattle from Ontario
Find and compare round-trip flight prices for your last-minute flight from Ontario to Seattle
Best airlines flying from Ontario to Seattle
Compare and see reviews for airlines that fly from Ontario to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $66 | Free Cancellation | Rating 6.3 4,139 reviews | |||
| PriceFrom $69 | Free Cancellation | Rating 7.6 4,624 reviews | |||
| PriceFrom $79 | Free Cancellation | Rating 8.0 11,004 reviews | |||
| PriceFrom $90 | Free Cancellation | Rating 8.1 9,111 reviews | |||
| PriceFrom $99 | Free Cancellation | Rating 6.4 8,754 reviews | |||
| PriceFrom $164 | Free Cancellation | Rating 7.4 11,272 reviews | |||
| PriceFrom $270 | Free Cancellation | Rating 7.3 14,898 reviews |
Alaska Airlines Flights From Ontario to Seattle
Alaska Airlines flight deals from Ontario to Seattle start from $90 round-trip. Over the 14 Alaska Airlines flights for this route in a normal week, average airfare is usually $220 round-trip - but some users have found much cheaper deals with momondo.
Delta Flights From Ontario to Seattle
$79 is the best Delta flight deal from Ontario to Seattle found on momondo over the last 72 hours. The average Delta ticket price found was closer to $216, however, with flight time and availability significantly affecting the price. Delta (8.0/10 from 11,004 user reviews) flies into Seattle from Ontario 21 times in an average week so prices can vary.
Frontier flights from Ontario to Seattle
Our best Frontier deals on Ontario to Seattle flight tickets
Alaska Airlines flights from Ontario to Seattle
Our best Alaska Airlines deals on Ontario to Seattle flight tickets
How to get the cheapest flight ticket from Ontario to Seattle
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
What is the cheapest month to fly from Ontario to Seattle?
January. The cheapest time of year to fly to Seattle from Ontario is January. Most expensive is June
What is the cheapest day to depart Ontario for Seattle?
Wednesday. The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday
When is the cheapest time to fly from Ontario to Seattle?
In the evening. Ontario to Seattle flights are approximately 15% more expensive at noon than in the evening
What is the cheapest airline that flies to Seattle from Ontario?
Frontier. Alaska Airlines, Delta, and Frontier are the most popular carriers operating from Ontario to Seattle
What is the cheapest Ontario to Seattle flight route?
Ontario - Seattle/Tacoma Intl. Fly from Ontario to Seattle/Tacoma Intl for the best Ontario - Seattle flight prices
How far in advance should you book Ontario to Seattle flights?
60 days before. The cheapest time to buy a flight from Ontario to Seattle is approximately 60 days to departure
How many flights depart from Ontario to Seattle on average per day?
The number of flights available between Ontario and Seattle is 12 per day as of April 2024. The most frequent departure time is 6:00AM, with 63% of daily flights leaving at noon.
How many flights depart from Ontario to Seattle on average per week?
As of April 2024, there are 86 flights per week flying from Ontario to Seattle. The most common day of the week flights depart is Monday, with 17% of flights taking off on this day.
What cabin class options are available on Ontario to Seattle flights?
There are 3 cabin classes available to choose from on Ontario to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Ontario to Seattle flights?
You could potentially save up to 8% on your flight if you consider stops on a Ontario to Seattle flight.
Cheap Ontario to Seattle (ONT to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Seattle
Best Price Found | $35 |
|---|---|
Fastest flight time | 2h 38m |
Direct flights | Every day |
Airports in Seattle | 1 airport |
How far is Ontario to Seattle/Tacoma Intl by plane?
The straight-line distance from Ontario to Seattle/Tacoma Intl is 966.6 mi. By plane, this route typically takes 2h 38m.
When did momondo last update prices for flights from Ontario Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Ontario Airport to Seattle/Tacoma Intl Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Ontario Airport to Seattle/Tacoma Intl Airport is 8 as of April 2024.
How old do you have to be to fly from Ontario Airport to Seattle/Tacoma Intl Airport?
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 Ontario Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to Seattle?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Seattle. momondo saves you time and could save you money on your trip.
Can I find flights from Ontario to Seattle with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Seattle from Ontario with this policy.
How can momondo help me find flights from Ontario to Seattle?
momondo helps you find the best flight between Ontario and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Ontario to Seattle right now. Can momondo alert me if prices change?
Price alerts on flights to Seattle from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.