This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
11 Jan — 18 Jan1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Ottawa to Seattle/Tacoma Intl are usually found in September or January, booked 90 days in advance, depart on a Thursday or Friday and return on a Monday
Cheap flight deals from Ottawa to Seattle
Enter your travel dates to find the best prices.
Cheapest flights from Ottawa to Seattle
Explore the most affordable flight options available from Ottawa to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 December 2025.
Mon 22/124:15 p.m.YOW - SEA
1 stop9h 01mUnited Airlines
Fri 2/111:15 p.m.SEA - YOW
1 stop12h 12mUnited Airlines
Deal found 10/12C$ 969
Mon 15/127:15 p.m.YOW - SEA
2 stops22h 05mWestJet
Wed 17/123:10 p.m.SEA - YOW
2 stops30h 32mWestJet
Deal found 10/12C$ 1,182
Sun 14/125:14 p.m.YOW - SEA
1 stop8h 14mUnited Airlines
Thu 18/125:02 a.m.SEA - YOW
2 stops13h 54mUnited Airlines
Deal found 9/12C$ 1,207
Sun 14/122:05 p.m.YOW - SEA
2 stops11h 23mUnited Airlines
Wed 17/125:00 a.m.SEA - YOW
2 stops13h 56mUnited Airlines
Deal found 9/12C$ 1,216
Mon 15/122:17 p.m.YOW - SEA
1 stop9h 37mUnited Airlines
Wed 17/1211:50 p.m.SEA - YOW
1 stop10h 42mUnited Airlines
Deal found 10/12C$ 1,265
Sun 14/125:50 p.m.YOW - SEA
1 stop7h 56mAir Canada
Wed 17/128:10 a.m.SEA - YOW
1 stop14h 28mAir Canada
Deal found 9/12C$ 1,307
Mon 15/126:45 a.m.YOW - SEA
2 stops15h 04mAmerican Airlines
Wed 17/125:00 p.m.SEA - YOW
2 stops20h 51mAmerican Airlines
Deal found 10/12C$ 1,317
Mon 15/125:40 a.m.YOW - SEA
2 stops31h 13mMultiple Airlines
Wed 17/128:55 a.m.SEA - YOW
1 stop12h 30mMultiple Airlines
Deal found 10/12C$ 1,445
Best flights from Ottawa to Seattle
Discover carefully curated flight deals from Ottawa to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 December 2025.
Wed 8/45:40 a.m.YOW - SEA
2 stops11h 39mWestJet
Tue 14/43:10 p.m.SEA - YOW
2 stops30h 29mWestJet
Deal found 10/12C$ 331
Wed 22/46:00 a.m.YOW - SEA
3 stops16h 00mUnited Airlines
Fri 24/47:02 p.m.SEA - YOW
2 stops11h 09mUnited Airlines
Deal found 9/12C$ 411
Sun 25/15:45 p.m.YOW - SEA
1 stop23h 35mWestJet
Sun 1/23:10 p.m.SEA - YOW
1 stop22h 43mWestJet
Deal found 11/12C$ 341
Fri 9/16:00 a.m.YOW - SEA
1 stop11h 20mWestJet
Sun 11/13:10 p.m.SEA - YOW
2 stops30h 32mWestJet
Deal found 10/12C$ 361
Sun 1/26:00 a.m.YOW - SEA
1 stop11h 19mWestJet
Wed 4/23:10 p.m.SEA - YOW
1 stop22h 43mWestJet
Deal found 11/12C$ 371
Last-minute flights from Ottawa to Seattle
Discover last-minute flight deals from Ottawa to Seattle. Data last updated 12 December 2025 and is based on user searches.
Tue 6/14:35 p.m.YOW - SEA
2 stops20h 59mMultiple Airlines
Sun 11/13:10 p.m.SEA - YOW
1 stop20h 12mMultiple Airlines
Deal found 10/12C$ 658
Fri 9/15:40 a.m.YOW - SEA
2 stops11h 40mWestJet
Sun 11/13:10 p.m.SEA - YOW
2 stops30h 32mWestJet
Deal found 10/12C$ 331
Fri 9/112:00 p.m.YOW - SEA
1 stop13h 16mAir Canada
Sun 11/18:10 a.m.SEA - YOW
1 stop7h 28mAir Canada
Deal found 10/12C$ 472
Sun 11/112:00 p.m.YOW - SEA
1 stop13h 16mAir Canada
Mon 12/18:00 p.m.SEA - YOW
1 stop7h 43mAir Canada
Deal found 11/12C$ 428
Sun 11/15:40 a.m.YOW - SEA
2 stops31h 13mMultiple Airlines
Mon 12/111:10 p.m.SEA - YOW
1 stop15h 03mMultiple Airlines
Deal found 11/12C$ 563
Sun 11/15:45 p.m.YOW - SEA
2 stops19h 37mWestJet
Mon 12/13:10 p.m.SEA - YOW
2 stops30h 32mWestJet
Deal found 11/12C$ 618
Sun 25/15:45 p.m.YOW - SEA
1 stop23h 35mWestJet
Sun 1/23:10 p.m.SEA - YOW
1 stop22h 43mWestJet
Deal found 11/12C$ 341
Sun 25/15:35 p.m.YOW - SEA
2 stops18h 40mAir Canada
Sun 1/28:00 p.m.SEA - YOW
2 stops9h 18mAir Canada
Deal found 11/12C$ 412
One-way flights from Ottawa to Seattle
Search for one-way flight options from Ottawa to Seattle. Find affordable one-way fares based on user searches. Data last updated 12 December 2025.
Sat 24/14:15 p.m.YOW - SEA
1 stop9h 01mAir Canada
Deal found 10/12C$ 221
Sat 24/15:00 a.m.YOW - SEA
3 stops19h 12mUnited Airlines
Deal found 10/12C$ 498
Tue 30/127:27 p.m.YOW - SEA
1 stop19h 00mUnited Airlines
Deal found 11/12C$ 560
Mon 29/127:27 p.m.YOW - SEA
1 stop19h 00mUnited Airlines
Deal found 11/12C$ 611
Tue 30/126:45 a.m.YOW - SEA
3 stops15h 43mAmerican Airlines
Deal found 10/12C$ 1,152
Mon 29/126:45 a.m.YOW - SEA
3 stops15h 29mAmerican Airlines
Deal found 11/12C$ 1,201
Find flight deals from Ottawa to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 December 2025.
Customize your flight search to find flights from Ottawa to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 12 December 2025.
Use the filters below to find and compare flights from Ottawa to Seattle that are best for you.
Fly from
Ottawa
Fly to
Seattle
Route
Depart
Return
Price
OttawaSeattle
YOW - SEA
YOWSEA
Ottawa
Wed 8/4
5:40 a.m.-2:19 p.m.
2 stops11h 39m
Seattle/Tacoma Intl
Tue 14/4
3:10 p.m.-12:39 a.m.
2 stops30h 29m
C$ 331
OttawaSeattle
YOW - SEA
YOWSEA
Ottawa
Sun 25/1
5:45 p.m.-2:20 p.m.
1 stop23h 35m
Seattle/Tacoma Intl
Sun 1/2
3:10 p.m.-4:53 p.m.
1 stop22h 43m
C$ 341
OttawaSeattle
YOW - SEA
YOWSEA
Ottawa
Fri 9/1
6:00 a.m.-2:20 p.m.
1 stop11h 20m
Seattle/Tacoma Intl
Sun 11/1
3:10 p.m.-12:42 a.m.
2 stops30h 32m
C$ 361
OttawaSeattle
YOW - SEA
YOWSEA
Ottawa
Sun 1/2
6:00 a.m.-2:19 p.m.
1 stop11h 19m
Seattle/Tacoma Intl
Wed 4/2
3:10 p.m.-4:53 p.m.
1 stop22h 43m
C$ 371
OttawaSeattle
YOW - SEA
YOWSEA
Ottawa
Wed 22/4
6:00 a.m.-7:00 p.m.
3 stops16h 00m
Seattle/Tacoma Intl
Fri 24/4
7:02 p.m.-9:11 a.m.
2 stops11h 09m
C$ 411
OttawaSeattle
YOW - SEA
YOWSEA
Ottawa
Sat 24/1
4:15 p.m.-10:16 p.m.
1 stop9h 01m
C$ 221
OttawaSeattle
YOW - SEA
YOWSEA
Ottawa
Sat 24/1
5:00 a.m.-9:12 p.m.
3 stops19h 12m
C$ 498
OttawaSeattle
YOW - SEA
YOWSEA
Ottawa
Tue 30/12
7:27 p.m.-11:27 a.m.
1 stop19h 00m
C$ 560
OttawaSeattle
YOW - SEA
YOWSEA
Ottawa
Mon 29/12
7:27 p.m.-11:27 a.m.
1 stop19h 00m
C$ 611
OttawaSeattle
YOW - SEA
YOWSEA
Ottawa
Mon 29/12
6:45 a.m.-7:14 p.m.
3 stops15h 29m
C$ 1,201
Flights are sorted by cheapest round-trip flights first.
Deals found on 10/12
Best time to book a flight from Ottawa to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Ottawa with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ottawa to Seattle
Prices
More
How far ahead should I book a flight from Ottawa to Seattle?
Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Seattle. Price data was last updated on 5 December 2025.
Booking 89 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Ottawa to Seattle?
Currently, January is the cheapest month in which you can book a flight from Ottawa to Seattle (average of C$ 251). Flying from Ottawa to Seattle in February is currently the most expensive (average of C$ 494). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from YOW to SEA?
Find hourly flight availability from Ottawa to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2025.
It’s typically best to fly out from Ottawa to Seattle in the evening. Doing so could potentially save you 14% on the flight price compared to flying at noon, which is usually more expensive.
What’s the top layover airport for flights from Ottawa to Seattle?
Share of one-stop round-trip flights from Ottawa to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Calgary (YYC) – chosen by Cheapflights users on 38% of one-stop itineraries from Ottawa to Seattle on Cheapflights.
What’s the cheapest layover airport for flights from Ottawa to Seattle?
Average round-trip fare for 1-stop flights from Ottawa to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 559.
What’s the fastest layover option from Ottawa to Seattle?
Shortest average travel time for 1-stop one-way flights from Ottawa to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Vancouver (YVR) have the shortest average one-way travel time for 1-stop routes: 7h 26m.
Which airport typically offers the quickest layover for flights from Ottawa to Seattle?
Average layover duration for 1-stop one-way flights from Ottawa to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 12m.
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 12 December 2025.
Get a feel of what it's like to fly with United Airlines,WestJet, andAir Canada from Ottawa to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
Related info for your journey
Find useful and relevant information for your journey from Ottawa to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
How long is the flight from Ottawa to Seattle?
There are many flights that can get you from Ottawa to Seattle in 11h 39m. Fly via WestJet to get the fastest option. The distance between Ottawa and Seattle is about 3529 km.
What are the cheapest airlines flying from Ottawa to Seattle round-trip?
According to our current data, United Airlines (C$ 289), WestJet (C$ 362), and Air Canada (C$ 403) offers the cheapest pricing from Ottawa to Seattle. You may be able to fly from Ottawa to Seattle for 49% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Ottawa to Seattle one-way?
C$ 208 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Air Canada and WestJet, with prices starting from C$ 227 and C$ 232, respectively.
Can I find deals for flights from Ottawa to Seattle that include hotel bookings?
Yes. In addition to deals on Ottawa to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ottawa to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Seattle.
Can I find deals for business class flights from Ottawa to Seattle?
Yes. Cheapflights offers flight deals from Ottawa to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Ottawa to Seattle?
Currently, January is the cheapest month in which you can book a flight from Ottawa to Seattle (average of C$ 251). Flying from Ottawa to Seattle in February is currently the most expensive (average of C$ 494). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 December 2025.
Discover the top 3 airlines that operate flights from Ottawa to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 12 December 2025.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Ottawa to Seattle?
Cheapflights makes it easy to find Ottawa to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from Ottawa to Seattle?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Seattle from Ottawa.
Can Cheapflights find flights from Ottawa to Seattle with no change fees?
Yes! Cheapflights helps users easily find flights from Ottawa to Seattle with no change fees.
Can Cheapflights notify me if prices for flights from Ottawa to Seattle become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
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