YOW - SEA

C$ 233 Find Cheap Flights from Ottawa to Seattle – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 353
Typical prices: C$ 481-C$ 782
WestJet
Mon 1/10Sun 7/10
YOW - SEA • 1 stop
Cheapest one-way flights
C$ 233
Typical prices: C$ 293-C$ 606
WestJet
Sat 29/9
YOW - SEA • 1 stop
Direct 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
6 weeks
in advance
Our data shows that travellers who book at least 6 weeks in advance save around 41% compared to booking last minute.
Insights
Insights
When to travel
January
Cheapest • 28% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Edmonton (YEG)
Cheapest • Avg C$ 536 (round-trip)
Chicago O'Hare Intl (ORD)
Shortest trip • 8h 07m (one-way)
Insights
Insights
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We hope you enjoy your trip to Seattle!
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

Thu, 1 Oct - Wed, 7 Oct
WestJet Logo
1:20 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
WestJet Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 353WestJet
Thu, 1 Oct - Wed, 7 Oct
WestJet Logo
6:55 a.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
14h 50m2 stops Toronto Pearson Intl Calgary
WestJet Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 370WestJet
Thu, 1 Oct - Wed, 7 Oct
WestJet Logo
1:20 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
WestJet Logo
10:30 a.m. - 12:20 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
10h 50m2 stops Calgary Toronto Pearson Intl
C$ 375WestJet
Sun, 22 Nov - Sun, 6 Dec
Air Canada Logo
7:45 a.m. - 2:37 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
9h 52m1 stop Vancouver Intl
Air Canada Logo
7:45 a.m. - 7:30 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
8h 45m1 stop Toronto Pearson Intl
C$ 480Air Canada
Sat, 24 Oct - Sat, 31 Oct
Air Canada Logo
6:05 p.m. - 10:47 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
7h 42m1 stop Vancouver Intl
Air Canada Logo
10:10 a.m. - 12:56 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
11h 46m1 stop Vancouver Intl
C$ 480Air Canada
Thu, 22 Oct - Thu, 29 Oct
Multiple Airlines Logo
1:20 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Multiple Airlines Logo
8:09 p.m. - 1:00 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
25h 51m2 stops Los Angeles Calgary
C$ 500Multiple Airlines
Thu, 19 Nov - Mon, 23 Nov
Air Canada Logo
7:50 a.m. - 6:22 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
13h 32m2 stops Calgary Vancouver Intl
Air Canada Logo
10:10 a.m. - 11:11 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
10h 01m2 stops Vancouver Intl Calgary
C$ 532Air Canada
Sat, 12 Dec - Sun, 13 Dec
United Airlines Logo
6:15 a.m. - 10:33 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
19h 18m1 stop Chicago O'Hare Intl
United Airlines Logo
5:24 p.m. - 1:26 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
17h 02m2 stops San Francisco Newark
C$ 540United Airlines
Sat, 5 Dec - Sat, 12 Dec
United Airlines Logo
6:15 a.m. - 9:21 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
18h 06m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
11:43 p.m. - 1:26 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
10h 43m1 stop Newark
C$ 540United Airlines
Sat, 21 Nov - Sun, 29 Nov
Multiple Airlines Logo
3:10 p.m. - 10:11 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
10h 01m1 stop Newark
Multiple Airlines Logo
8:40 a.m. - 11:11 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
11h 31m2 stops Vancouver Intl Calgary
C$ 540Multiple Airlines
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 from Ottawa to Seattle with more confidence.

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

Round-trip flights from Ottawa to Seattle start at C$ 353. Prices are below average for this route right now, with typical round-trip fares ranging from C$ 481 to C$ 782. The lowest price found in the past 5 days was C$ 353 on WestJet.

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

Friday is the cheapest day of the week to fly from Ottawa to Seattle and is 14% cheaper than the average day. Saturday is the most expensive day with flight prices 12% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Ottawa to Seattle?

  • January is the cheapest month to fly from Ottawa to Seattle at C$ 434 round-trip.
  • May (C$ 783) and December (C$ 744) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 80% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Ottawa to Seattle the cheapest?

Flights from Ottawa to Seattle are cheapest 6 weeks before departure. Booking in this window typically costs about 41% 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

February

Cheapest flight

C$ 233
Best time to beat the crowds (24% less expensive on average)
Most popular time to fly (16% more expensive on average)
Flights 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 route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

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

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

    • Economy Class
    • Premium Economy Class
    • First Class

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

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

    • Calgary (YYC) – 51% of one-stop connections
    • Vancouver Intl (YVR) – 24% of one-stop connections
    • Toronto Pearson Intl (YYZ) – 15% of one-stop connections
    • Chicago O'Hare Intl (ORD) – 6% of one-stop connections

    Calgary (YYC) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 23% on the Ottawa to Seattle route. Friday is the cheapest departure day at C$ 523 round-trip on average, while Saturday is the most expensive at C$ 676, a difference of C$ 153. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • Which popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Lumen Field, T-Mobile Park, and Seattle Waterfront. These are among the most viewed places in Seattle on KAYAK.

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

    Last-minute fares on this route – booked within 2 weeks of departure – run 45% above the route average of C$ 602. Book 6 weeks before departure for the lowest fares.

  • How long does a flight from Ottawa to Seattle take?

    A direct flight from Ottawa to Seattle takes 0h 00m, covering 5,679 km.

  • 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.

  • 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 C$ 353 to C$ 1,869. That means the highest observed fare was about 5x 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 C$ 286, which is 34% below the typical average for this route.

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

    Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time at 8h 07m, compared with 8h 18m via Vancouver Intl (YVR) and 8h 22m via Calgary (YYC).

  • 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 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 starting from around C$ 5 for economy cars. Top options include:
    · Fox
    · Europcar
    · Thrifty
    · Budget
    · Dollar

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

    Round-trip flights from Ottawa to Seattle range from C$ 481 to C$ 782, with an average of C$ 602 over the past 12 months. Anything below C$ 481 counts as a good deal.

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 Friday departure instead of Saturday. On this route, Friday flights average C$ 523 – about C$ 153 less than Saturday (23% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 6 weeks before you fly. On this route, that window historically saves about 41% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Ottawa to Seattle trip for January. Fares historically average C$ 434 round-trip in that month – typically C$ 349 less than the most expensive month, which is May (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.
    - Seattle Airport Marriott
    - Coast Gateway Hotel
    - 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