Cheap flights from Ottawa to Seattle from $185
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to Seattle departing on 5/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
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 Ottawa to Seattle
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
United Airlines flights from Ottawa to Seattle
Our best United Airlines deals on Ottawa to Seattle flight tickets
Delta flights from Ottawa to Seattle
Our best Delta deals on Ottawa to Seattle flight tickets
See travel insights to Seattle from
How to get the cheapest flight ticket from Ottawa 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 typical price of a round-trip flight between Ottawa and Seattle?
What is the cheapest month to fly to Seattle?
In general, March is the cheapest month to fly from Ottawa to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $387. If you don’t want to visit Seattle in March, then you should wait until August to fly from Ottawa, when ticket prices are also cheap, with an average price of $395.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Ottawa is on a Saturday. momondo users have found tickets for Saturday departures for as low as $422. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Ottawa because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $577.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Ottawa in the evening is the least expensive time of day to depart. momondo users have found prices as low as $433 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $597. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from Ottawa when booking 23 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $434 when searching 23 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Ottawa for as low as $330 on momondo.
What is the cheapest airline that flies from Ottawa to Seattle/Tacoma Intl?
WestJet, Air Canada, and United Airlines are the most popular carriers operating from Ottawa to Seattle/Tacoma Intl
What airlines fly to Seattle?
Air Canada, WestJet and United Airlines are the top three most popular airlines that fly to Seattle from Ottawa according to our data. Air Canada is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 4 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
When to book flights from Ottawa to Seattle
Cheap Ottawa to Seattle (YOW to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ottawa to Seattle
How far is Ottawa to Seattle/Tacoma Intl by plane?
The distance between Ottawa and Seattle/Tacoma Intl is about 2187.8 mi. Flights usually cover this in 7h 16m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Ottawa Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Ottawa Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Ottawa Airport to Seattle/Tacoma Intl Airport?
As of May 2025, there are 3 operators available to choose from for flights from Ottawa Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Ottawa Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ottawa Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ottawa to Seattle?
momondo data reveals that the most frequently booked airline on the route from Ottawa to Seattle is WestJet, representing 42% of all bookings. The subsequent popular airlines are Air Canada at 38% and United Airlines at 20%.
Best airlines flying from Ottawa to Seattle
Compare and see reviews for airlines that fly from Ottawa to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $277 | Free Cancellation | Rating 7.2 2,826 reviews | |||
| PriceFrom $296 | Free Cancellation | Rating 7.4 8,696 reviews | |||
| PriceFrom $328 | Free Cancellation | Rating 7.0 9,252 reviews |
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ottawa to Seattle?
It is quick and easy to find Ottawa to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.
Can I find flights from Ottawa to Seattle with flexible booking policies on momondo?
momondo does allow users to show only those flights to Seattle from Ottawa which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Ottawa to Seattle?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ottawa to Seattle.
I’m not ready to book a flight from Ottawa to Seattle right now. Can momondo alert me if prices change?
Price alerts on flights to Seattle from Ottawa 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.