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Cheap Flights from Seattle (SEA) to St. Catharines (YCM)

Popular airlines from Seattle-Tacoma International Airport (SEA) to St. Catharines, ON (YCM-Niagara District)

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Alternative airports near St. Catharines

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Buffalo Niagara Intl. BUF. Cheapest option available. Average driving time to city centre is 51 minutes. Flights from CA $683
BUF
Buffalo Niagara Intl.
Cheapest
Average driving time to city centre51 min
Flights from CA $683

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District) cost?
You can find one-way and return flights from SEA to YCM with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when SEA to YCM ticket fares go up or down.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District)?
The cheapest months to fly from SEA to YCM are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District)?
Enter SEA to YCM and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from SEA to YCM. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District)?
Select the "Business class" and "First class" filters when looking for SEA to YCM flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Catharines, ON (YCM-Niagara District) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Niagara District
Distance
3341 km

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Seattle to Niagara-on-the-Lake Flights

The easy way to book your flights from Seattle to St. Catharines 

With Expedia, it’s simple to find and book flights to St. Catharines from Seattle whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from airlines that cover this route. There are nonstop flights to Niagara District, too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Seattle to St. Catharines today, tomorrow, or this week.  

 

Save dollars with cheap flights from Seattle - Tacoma Intl., SEA to Niagara District, YCM 

Sort your search results by price to find great deals on your flight from Seattle to St. Catharines—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to St. Catharines from Seattle currently is just rising to .  

Here are more money-saving tips: 

  • Fly in when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to St. Catharines  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to St. Catharines from Seattle 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to St. Catharines with Expedia today.

Seattle to Niagara-on-the-Lake Flights

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