YOW - SEA

$216 Find Cheap Flights from Ottawa to Seattle - Compare and Save

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Everything you should know

Cheapest round-trip
$418
Typical prices: $359-$581
Air Canada
Thu 11/22Sat 12/1
YOW - SEA • 2 stops
Cheapest one-way
$216
Typical prices: $229-$391
WestJet
Sun 1/21
YOW - SEA • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Ottawa and Seattle. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
19 weeks
in advance
Our data shows that travelers who book at least 19 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
When to travel
November
Cheapest • 34% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Toronto Pearson Intl (YYZ)
Cheapest • Avg $452 (round-trip)
Calgary (YYC)
Shortest trip • 8h 07m (one-way)
Insights
Insights
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ottawa to Seattle (YOW-SEA)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ottawa to Seattle

Sun, Nov 22 - Tue, Dec 1
Air Canada Logo
7:50 am - 6:22 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
13h 32m2 stops Calgary Vancouver Intl
Air Canada Logo
10:10 am - 12:26 amSEA  Seattle/Tacoma Intl-YOW Ottawa
11h 16m2 stops Vancouver Intl Calgary
$418Air Canada
Sun, Nov 22 - Tue, Dec 1
Air Canada Logo
7:50 am - 6:22 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
13h 32m2 stops Calgary Vancouver Intl
Air Canada Logo
7:45 am - 7:30 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
8h 45m1 stop Toronto Pearson Intl
$426Air Canada
Sun, Nov 22 - Tue, Dec 1
Air Canada Logo
2:00 pm - 8:59 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
9h 59m1 stop Toronto Pearson Intl
Air Canada Logo
7:45 am - 7:30 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
8h 45m1 stop Toronto Pearson Intl
$433Air Canada
Sat, Dec 12 - Thu, Dec 31
United Airlines Logo
6:15 am - 8:47 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
17h 32m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
10:50 pm - 7:27 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
17h 37m1 stop Washington, D.C. Dulles Intl
$445United Airlines
Sat, Dec 12 - Mon, Jan 4
United Airlines Logo
6:15 am - 4:18 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
13h 03m1 stop Chicago O'Hare Intl
United Airlines Logo
11:44 pm - 2:09 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
11h 25m1 stop Chicago O'Hare Intl
$445United Airlines
Sat, Dec 12 - Thu, Dec 31
United Airlines Logo
4:36 pm - 9:46 amYOW  Ottawa-SEA Seattle/Tacoma Intl
20h 10m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
7:25 pm - 1:11 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
14h 46m2 stops San Francisco Newark
$445United Airlines
Thu, Dec 10 - Thu, Dec 31
Air Canada Logo
2:00 pm - 8:59 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
9h 59m1 stop Toronto Pearson Intl
Air Canada Logo
8:40 am - 12:56 amSEA  Seattle/Tacoma Intl-YOW Ottawa
13h 16m1 stop Vancouver Intl
$471Air Canada
Sat, Dec 12 - Sun, Jan 3
WestJet Logo
5:30 am - 1:40 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
35h 10m2 stops Toronto Pearson Intl Calgary
WestJet Logo
2:30 pm - 2:30 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
21h 00m1 stop Calgary
$484WestJet
Thu, Dec 10 - Thu, Dec 31
WestJet Logo
6:10 am - 1:40 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
WestJet Logo
2:30 pm - 11:40 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
30h 10m2 stops Calgary Toronto Pearson Intl
$492WestJet
Fri, Feb 19 - Wed, Feb 24
WestJet Logo
6:10 am - 1:40 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
WestJet Logo
2:30 pm - 2:30 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
21h 00m1 stop Calgary
$502WestJet
Booking Insights

Price, demand and travel trends for Ottawa to Seattle flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Ottawa to Seattle?

Round-trip flights from Ottawa to Seattle typically range from $359 to $581. The lowest price found in the past 5 days was $418, on Air Canada.

What's the cheapest day of the week to fly from Ottawa to Seattle?

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Ottawa to Seattle. It’s 9% cheaper than the average day, while Sunday is the most expensive, with prices 9% higher.

What’s the cheapest month to fly from Ottawa to Seattle?

•November is the cheapest month to fly from Ottawa to Seattle at $301 round-trip.
•December ($634) and May ($568) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 110% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Ottawa to Seattle the cheapest?

Flights from Ottawa to Seattle are cheapest 19 weeks before departure. Booking in this window typically costs about 43% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Ottawa to Seattle flights

Low season

November

Cheapest flight

$216
Beat the crowds with an average 52% drop in travelers.
The most popular month to fly with an average 89% increase in travelers.
One-way flight from Ottawa to Seattle

When to book flights from Ottawa to Seattle

Are your dates flexible? Find out the best times to travel from Ottawa to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Ottawa to Seattle flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Ottawa to Seattle?

    Three cabin classes are available on flights from Ottawa to Seattle:

    • Economy Class
    • Business Class
    • First Class

  • How long is a flight from Ottawa to Seattle?

    A nonstop flight from Ottawa to Seattle takes 00m, covering 2,193 miles.

  • Do I need a passport to fly from Ottawa to Seattle?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Ottawa to Seattle flight?

    Round-trip flights from Ottawa to Seattle range from $359 to $581, with an average of $454 over the past 12 months. Anything below $359 counts as a good deal.

  • How expensive are last-minute Ottawa to Seattle flights?

    Last-minute fares on this route (booked within two weeks of departure) run 40% above the $454 route average. Book 19 weeks before departure for the lowest fares.

  • Have flight prices from Ottawa to Seattle changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $418 to $1,176. That means the highest observed fare was about 3x higher than the lowest one.

  • How are flight prices from Ottawa to Seattle looking right now?

    One-way fares from Ottawa to Seattle are currently lower than usual. Average one-way flight prices are about $244, which is 14% below the typical average for this route.

  • What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates averaging $61 for economy cars. Top options include:

    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Hertz

  • Which airports can I use when flying from Ottawa to Seattle?

    Flights from Ottawa to Seattle usually depart from Ottawa (YOW) and arrive at Seattle/Tacoma Intl (SEA).

  • Which airports do connecting flights from Ottawa to Seattle pass through?

    One-stop flights from Ottawa to Seattle most commonly connect through:

    • Calgary (YYC) - 59% of one-stop connections
    • Vancouver Intl (YVR) - 22% of one-stop connections
    • Toronto Pearson Intl (YYZ) - 14% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 4% of one-stop connections

  • Can I save money by using flexible dates for flights from Ottawa to Seattle?

    Yes. Flexible dates can save you up to 17% on flights from Ottawa to Seattle. Tuesday is the cheapest departure day at $414 round-trip on average, while Sunday is the most expensive at $497, a difference of $83.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Ottawa to Seattle?

    Flying via Calgary (YYC) gives the shortest average 1-stop total travel time at 8h 07m, compared with 8h 10m via Chicago O'Hare Intl (ORD) and 8h 25m via Vancouver Intl (YVR).

  • What is the time difference between Ottawa and Seattle?

    Seattle is 3 hours behind Ottawa (Pacific Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

Your guide to booking Ottawa to Seattle flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure and avoid flying on Sunday. On this route, Tuesday flights average $414, about $83 less than Sunday fares (17% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 19 weeks before you fly. On this route, that window historically saves about 43% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Ottawa to Seattle trip for November. Fares historically average $301 round-trip in that month - typically $333 less than the most expensive month, which is December (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.

    • Coast Gateway Hotel
    • Seattle Airport Marriott
    • Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

More options for your flight from Ottawa to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Car rentals in Seattle
Hotels in Seattle
Vacations in Seattle