$169+ Cheap flights from Ottawa (YOW) to Seattle (SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
Oct 8 — Oct 151
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ottawa to Seattle
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Best
Last-minute
One-way
Cheapest flights from Ottawa to SeattleExplore 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 September 8, 2026.
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 September 8, 2026.
This Booking.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:20 pm -
1 stop8h 25m
Wed 10/77:35 pm -
1 stop7h 00m
Deal found 9/8![WestJet logo]()
$256
This Trip.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/181:20 pm -
1 stop8h 25m
Fri 9/257:35 pm -
1 stop7h 00m
Deal found 9/6![WestJet logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:15 pm -
1 stop25h 30m
Fri 9/257:35 pm -
1 stop7h 00m
Deal found 9/6![WestJet logo]()
$319
This oojo deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/301:20 pm -
1 stop8h 25m
Sun 10/410:30 am -
1 stop16h 05m
Deal found 9/8![WestJet logo]()
$326
This Booking.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:20 pm -
1 stop8h 25m
Sun 10/410:30 am -
2 stops10h 50m
Deal found 9/4![WestJet logo]()
$333
This WestJet deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/291:20 pm -
1 stop8h 25m
Wed 9/307:35 pm -
1 stop7h 00m
Deal found 9/3![WestJet logo]()
$334
Best flights from Ottawa to SeattleDiscover 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 September 8, 2026.
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 September 8, 2026.
This Justfly.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:10 am -
1 stop10h 30m
Mon 11/232:30 pm -
1 stop21h 00m
Deal found 9/8![WestJet logo]()
$362
This United Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/126:15 am -
1 stop19h 18m
Sun 12/135:24 pm -
2 stops17h 02m
Deal found 9/5![United Airlines logo]()
$392
This United deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/212:00 pm -
2 stops22h 47m
Sun 11/298:40 am -
2 stops11h 31m
Deal found 9/5![Multiple Airlines logo]()
$392
This Air Canada deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/192:00 pm -
1 stop9h 59m
Mon 11/238:40 am -
2 stops11h 31m
Deal found 9/4![Air Canada logo]()
$395
This oojo deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:55 am -
2 stops14h 50m
Sat 10/313:20 pm -
2 stops31h 24m
Deal found 9/3![WestJet logo]()
$377
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:25 am -
3 stops17h 50m
Wed 9/308:25 am -
1 stop12h 29m
Deal found 9/6![United Airlines logo]()
$392
This United deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/124:36 pm -
1 stop8h 57m
Sun 12/137:45 am -
1 stop8h 45m
Deal found 9/5![Multiple Airlines logo]()
$395
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:05 am -
1 stop15h 14m
Sat 10/3110:56 pm -
1 stop13h 13m
Deal found 9/3![United Airlines logo]()
$393
This United deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/256:00 am -
1 stop17h 37m
Sun 9/277:15 pm -
1 stop7h 43m
Deal found 9/6![Multiple Airlines logo]()
$397
Last-minute flights from Ottawa to SeattleDiscover last-minute flight deals from Ottawa to Seattle. Data last updated September 8, 2026 and is based on user searches.
Discover last-minute flight deals from Ottawa to Seattle. Data last updated September 8, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/181:20 pm -
1 stop8h 25m
Fri 9/257:35 pm -
1 stop7h 00m
Deal found 9/6![WestJet logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:15 pm -
1 stop25h 30m
Fri 9/257:35 pm -
1 stop7h 00m
Deal found 9/6![WestJet logo]()
$319
This WestJet deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/291:20 pm -
1 stop8h 25m
Wed 9/307:35 pm -
1 stop7h 00m
Deal found 9/3![WestJet logo]()
$334
This oojo deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/301:20 pm -
1 stop8h 25m
Sun 10/410:30 am -
1 stop16h 05m
Deal found 9/8![WestJet logo]()
$326
This Booking.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:20 pm -
1 stop8h 25m
Wed 10/77:35 pm -
1 stop7h 00m
Deal found 9/8![WestJet logo]()
$256
This Booking.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:20 pm -
1 stop8h 25m
Sun 10/410:30 am -
2 stops10h 50m
Deal found 9/4![WestJet logo]()
$333
One-way flights from Ottawa to SeattleSearch for one-way flight options from Ottawa to Seattle. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.
Search for one-way flight options from Ottawa to Seattle. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/291:20 pm -
1 stop8h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![WestJet logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/288:15 pm -
1 stop16h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![WestJet logo]()
$189
This Expedia deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:10 am -
1 stop10h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![WestJet logo]()
$196
This FlightHub deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:55 am -
2 stops14h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![WestJet logo]()
$198
This Mytrip deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:55 am -
2 stops14h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![WestJet logo]()
$202
This SmartFares deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/216:10 am -
1 stop10h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![WestJet logo]()
$203
This Booking.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:15 pm -
1 stop29h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![WestJet logo]()
$204
This Justfly.com deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:15 pm -
1 stop29h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![WestJet logo]()
$206
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 September 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $256 (Booking.com) |
One-way from | $169 (Kiwi.com) |
Popular in | May |
Cheapest in | January |
Average price | $352 |
Cheapflights Fare Finder
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 7,457,451 searches. Data last updated September 8, 2026.
Use the filters below to find and compare flights from Ottawa to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OttawaSeattle
YOW Ottawa - SEA Seattle/Tacoma Intl
YOWSEA
Ottawa
Tue 10/6
6:55 am-6:45 pm
2 stops14h 50m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$198
OttawaSeattle
YOW Ottawa - SEA Seattle/Tacoma Intl
YOWSEA
Ottawa
Mon 9/21
4:15 pm-6:45 pm
1 stop29h 30m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
OttawaSeattle
YOW Ottawa - SEA Seattle/Tacoma Intl
YOWSEA
Ottawa
Mon 11/9
2:00 pm-8:59 pm
1 stop9h 59m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$206
OttawaSeattle
YOW Ottawa - SEA Seattle/Tacoma Intl
YOWSEA
Ottawa
Fri 9/18
6:15 pm-9:40 am
2 stops18h 25m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$207
Quickest round-trip
OttawaSeattle
YOW Ottawa - SEA Seattle/Tacoma Intl
YOWSEA
Ottawa
Tue 10/6
5:00 am-10:05 am
1 stop8h 05m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$216
OttawaSeattle
YOW Ottawa - SEA Seattle/Tacoma Intl
YOWSEA
Ottawa
Sat 12/5
2:00 pm-8:59 pm
1 stop9h 59m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$218
OttawaSeattle
YOW Ottawa - SEA Seattle/Tacoma Intl
YOWSEA
Ottawa
Wed 9/30
6:00 am-4:05 pm
3 stops13h 05m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$226
OttawaSeattle
YOW Ottawa - SEA Seattle/Tacoma Intl
YOWSEA
Ottawa
Tue 9/29
6:00 am-10:56 pm
3 stops19h 56m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$226
OttawaSeattle
YOW Ottawa - SEA Seattle/Tacoma Intl
YOWSEA
Ottawa
Sat 12/5
4:36 pm-10:33 pm
1 stop8h 57m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$226
OttawaSeattle
YOW Ottawa - SEA Seattle/Tacoma Intl
YOWSEA
Ottawa
Wed 9/23
6:00 am-8:27 pm
1 stop17h 27m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$231
Showing 1-10 of 19 resultsSorted by cheapest first
- Most accurate provider: When it comes to deals on Ottawa-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ottawa-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ottawa-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
YOW-SEA
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
How far ahead should I book a flight from Ottawa to Seattle?
The best time to book flights from Ottawa to Seattle is 37 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 $285). Flying from Ottawa to Seattle in May is currently the most expensive (average of $610). 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.
How much does it cost to fly round-trip from Ottawa to Seattle?
Airfare is below average for this route at the moment.
Ottawa to Seattle flights typically cost between $304 and $428 in October.The cheapest round-trip price found within the last 5 days was $256 on WestJet (Oct 1-Oct 7).
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 September 8, 2026.
Peruse reviews from past customers who have flown with WestJet and Air Canada from Ottawa to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.4
Entertainment
6.1
Overall
7.2
Comfort
7.1
Crew
7.9
Food
6.2
Reviews
1 / 20
10.0
ExcellentAnonymous,Oct 2024
YYZ - MCO
Boarding
7.4
Entertainment
6.1
Overall
7.2
Comfort
7.1
Crew
7.9
Food
6.2
Reviews
1 / 20
10.0
ExcellentAnonymous,Oct 2024
YYZ - MCO
Boarding
7.4
Entertainment
6.1
Overall
7.2
Comfort
7.1
Crew
7.9
Food
6.2
Reviews
1 / 20
10.0
ExcellentAnonymous,Oct 2024
YYZ - MCO
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Edmonds
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Ottawa to Seattle
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Ottawa and Seattle flights
Browse other Ottawa and Seattle flight options. Last updated on September 8, 2026.
Other flights from Ottawa
Browse through other flights departing from Ottawa. Flights are based on user searches made on Cheapflights and were last updated on September 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 8, 2026.
Top 2 airlines flying from Ottawa to Seattle
Discover the top 2 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 7,457,451 searches. Data last updated September 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$290 | Average$447 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$336 | Average$434 | FlexibilityNo cancel fee | On-time60% |