What’s the fastest layover option from Ottawa to Seattle?

Flights via Vancouver (YVR) have the shortest average one-way travel time for 1-stop routes: 7h 31m.

What’s the cheapest layover airport for flights from Ottawa to Seattle?

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 564.

What’s the top layover airport for flights from Ottawa to Seattle?

Calgary (YYC) – chosen by Cheapflights users on 35% of one-stop itineraries from Ottawa to Seattle on Cheapflights.

Which airport typically offers the quickest layover for flights from Ottawa to Seattle?

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 14m.

How long is the flight from Ottawa to Seattle?

There are many flights that can get you from Ottawa to Seattle in 7h 31m. Fly via WestJet or Air Canada to get the fastest option. The distance between Ottawa and Seattle is about 3529 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines flying from Ottawa to Seattle round-trip?

According to our current data, WestJet (C$ 367), Air Canada (C$ 408), and United Airlines (C$ 421) offers the cheapest pricing from Ottawa to Seattle. You may be able to fly from Ottawa to Seattle for 38% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Ottawa to Seattle one-way?

C$ 209 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from C$ 240 and C$ 256, respectively.

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

Travelers seeking maximum savings on their Ottawa to Seattle flight should consider departing on Thursday evenings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

What are the most popular airlines that fly from Ottawa to Seattle?

The most popular airlines flying from Ottawa to Seattle are Air Canada, United Airlines and WestJet. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Ottawa to Seattle?

Travellers have found that booking a Wednesday departure is the best way to save up to 13% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

How far in advance should I book a flight from Ottawa to Seattle?

Users have found that booking a flight from Ottawa to Seattle at least 33 days early can save you up to 62% on average compared to booking a flight this week. If booking 33 days before your flight isn’t an option for you, users have found flights from Ottawa to Seattle for as little as C$ 502 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as C$ 1,057 for flights departing within the next 3 days.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, October can be a great choice for travel to Seattle. Flights to Seattle from Ottawa in October are about C$ 599 on average during October, but can be found for as low as C$ 369.

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.

C$ 209+ Cheap Flights from Ottawa to Seattle

Q: 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 C$ 460 and C$ 671 in October. The cheapest round-trip price found within the last 3 days was C$ 353 on WestJet (20 Oct-22 Oct).

Cheapflights Tip: The best prices from Ottawa to Seattle/Tacoma Intl are usually found in October or September, booked 32 days in advance, depart on a Thursday or Friday and return on a Monday

Cheap flight deals from Ottawa to Seattle

Round-trip from	C$ 353
One-way from	C$ 209
Popular in	December
Cheapest in	October
Average price	C$ 563

WestJet
20/10-22/10
2 total stops
15h 59m total
Ottawa to Seattle

Search Deals

WestJet
20/10
1 total stop
8h 09m total
Ottawa to Seattle

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (C$ 82 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 18 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Ottawa to Seattle

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 11 September 2025.

Mon 20/107:50 a.m.YOW - SEA

1 stop8h 09mWestJet

Wed 22/101:50 p.m.SEA - YOW

1 stop7h 50mWestJet

Deal found 11/9C$ 353

Fri 21/115:40 a.m.YOW - SEA

2 stops11h 40mWestJet

Sat 6/123:20 p.m.SEA - YOW

1 stop22h 33mWestJet

Deal found 9/9C$ 362

Mon 20/1012:20 p.m.YOW - SEA

2 stops11h 09mWestJet

Thu 23/108:40 a.m.SEA - YOW

2 stops12h 42mWestJet

Deal found 11/9C$ 364

Sat 11/106:00 p.m.YOW - SEA

1 stop7h 31mAir Canada

Wed 22/105:30 a.m.SEA - YOW

1 stop7h 42mAir Canada

Deal found 10/9C$ 396

Sat 25/106:00 a.m.YOW - SEA

1 stop9h 59mWestJet

Sat 1/113:20 p.m.SEA - YOW

1 stop23h 33mWestJet

Deal found 10/9C$ 398

Sat 11/107:15 p.m.YOW - SEA

2 stops20h 20mWestJet

Wed 22/108:40 a.m.SEA - YOW

2 stops12h 42mWestJet

Deal found 10/9C$ 410

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 11 September 2025.

Mon 20/107:50 a.m.YOW - SEA

1 stop8h 09mWestJet

Wed 22/101:50 p.m.SEA - YOW

1 stop7h 50mWestJet

Deal found 11/9C$ 353

Sat 11/106:00 p.m.YOW - SEA

1 stop7h 31mAir Canada

Wed 22/105:30 a.m.SEA - YOW

1 stop7h 42mAir Canada

Deal found 10/9C$ 396

Tue 30/92:48 p.m.YOW - SEA

1 stop10h 29mUnited Airlines

Sat 4/101:12 p.m.SEA - YOW

1 stop17h 46mUnited Airlines

Deal found 11/9C$ 418

Mon 20/1012:20 p.m.YOW - SEA

2 stops11h 09mWestJet

Thu 23/101:50 p.m.SEA - YOW

1 stop7h 50mWestJet

Deal found 11/9C$ 370

Sat 27/96:00 p.m.YOW - SEA

1 stop7h 16mAir Canada

Mon 29/97:15 a.m.SEA - YOW

1 stop7h 04mAir Canada

Deal found 11/9C$ 412

Fri 21/115:40 a.m.YOW - SEA

2 stops11h 40mWestJet

Sat 6/123:20 p.m.SEA - YOW

2 stops30h 22mWestJet

Deal found 9/9C$ 376

Wed 24/96:00 p.m.YOW - SEA

1 stop7h 16mAir Canada

Wed 1/105:30 a.m.SEA - YOW

2 stops10h 59mAir Canada

Deal found 10/9C$ 412

Sat 25/105:55 a.m.YOW - SEA

2 stops10h 04mWestJet

Sat 1/1111:55 a.m.SEA - YOW

2 stops9h 45mWestJet

Deal found 10/9C$ 399

Sat 11/107:15 p.m.YOW - SEA

2 stops20h 20mWestJet

Wed 22/108:40 a.m.SEA - YOW

2 stops12h 42mWestJet

Deal found 10/9C$ 410

Last-minute flights from Ottawa to Seattle
Discover last-minute flight deals from Ottawa to Seattle. Data last updated 11 September 2025 and is based on user searches.

Wed 24/96:00 p.m.YOW - SEA

1 stop7h 16mAir Canada

Wed 1/105:30 a.m.SEA - YOW

2 stops10h 59mAir Canada

Deal found 10/9C$ 412

Sat 11/106:00 p.m.YOW - SEA

1 stop7h 31mAir Canada

Wed 22/105:30 a.m.SEA - YOW

1 stop7h 42mAir Canada

Deal found 10/9C$ 396

Sat 11/107:15 p.m.YOW - SEA

2 stops20h 20mWestJet

Wed 22/108:40 a.m.SEA - YOW

2 stops12h 42mWestJet

Deal found 10/9C$ 410

Sat 18/106:00 p.m.YOW - SEA

1 stop7h 31mAir Canada

Sat 1/115:50 a.m.SEA - YOW

1 stop6h 55mAir Canada

Deal found 9/9C$ 413

Mon 20/107:50 a.m.YOW - SEA

1 stop8h 09mWestJet

Wed 22/101:50 p.m.SEA - YOW

1 stop7h 50mWestJet

Deal found 11/9C$ 353

Mon 20/1012:20 p.m.YOW - SEA

2 stops11h 09mWestJet

Thu 23/108:40 a.m.SEA - YOW

2 stops12h 42mWestJet

Deal found 11/9C$ 364

Sat 25/106:00 a.m.YOW - SEA

1 stop9h 59mWestJet

Sat 1/113:20 p.m.SEA - YOW

1 stop23h 33mWestJet

Deal found 10/9C$ 398

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 11 September 2025.

Mon 20/107:50 a.m.YOW - SEA

1 stop8h 09mWestJet

Deal found 11/9C$ 209

Sat 25/109:25 a.m.YOW - SEA

1 stop7h 51mAir Canada

Deal found 9/9C$ 240

Sat 25/107:29 p.m.YOW - SEA

2 stops18h 06mUnited Airlines

Deal found 9/9C$ 256

Sun 26/106:55 p.m.YOW - SEA

1 stop22h 25mMultiple Airlines

Deal found 11/9C$ 270

Mon 20/105:15 p.m.YOW - SEA

3 stops16h 56mMultiple Airlines

Deal found 11/9C$ 313

Fly from

Fly to

Route

Depart

Return

Price

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 20/10

7:50 a.m.-12:59 p.m.

1 stop8h 09m

Seattle/Tacoma Intl

Wed 22/10

1:50 p.m.-12:40 a.m.

1 stop7h 50m

C$ 353

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 20/10

12:20 p.m.-8:29 p.m.

2 stops11h 09m

Seattle/Tacoma Intl

Thu 23/10

1:50 p.m.-12:40 a.m.

1 stop7h 50m

C$ 370

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 21/11

5:40 a.m.-2:20 p.m.

2 stops11h 40m

Seattle/Tacoma Intl

Sat 6/12

3:20 p.m.-12:42 a.m.

2 stops30h 22m

C$ 376

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 11/10

6:00 p.m.-10:31 p.m.

1 stop7h 31m

Seattle/Tacoma Intl

Wed 22/10

5:30 a.m.-4:12 p.m.

1 stop7h 42m

C$ 396

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 25/10

5:55 a.m.-12:59 p.m.

2 stops10h 04m

Seattle/Tacoma Intl

Sat 1/11

11:55 a.m.-12:40 a.m.

2 stops9h 45m

C$ 399

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 11/10

7:15 p.m.-12:35 p.m.

2 stops20h 20m

Seattle/Tacoma Intl

Wed 22/10

8:40 a.m.-12:22 a.m.

2 stops12h 42m

C$ 410

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 27/9

6:00 p.m.-10:16 p.m.

1 stop7h 16m

Seattle/Tacoma Intl

Mon 29/9

7:15 a.m.-5:19 p.m.

1 stop7h 04m

C$ 412

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 24/9

6:00 p.m.-10:16 p.m.

1 stop7h 16m

Seattle/Tacoma Intl

Wed 1/10

5:30 a.m.-7:29 p.m.

2 stops10h 59m

C$ 412

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 30/9

2:48 p.m.-10:17 p.m.

1 stop10h 29m

Seattle/Tacoma Intl

Sat 4/10

1:12 p.m.-9:58 a.m.

1 stop17h 46m

C$ 418

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 20/10

7:50 a.m.-12:59 p.m.

1 stop8h 09m

C$ 209

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 14 results

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

How far ahead should I book a flight from Ottawa to Seattle?

Booking 32 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$ 262). Flying from Ottawa to Seattle in December is currently the most expensive (average of C$ 353). 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?

It’s typically best to fly out from Ottawa to Seattle in the evening. Doing so could potentially save you 15% on the flight price compared to flying at noon, which is usually more expensive.

How much does it cost to fly round-trip from Ottawa to Seattle?

Reviews of airlines servicing Seattle

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.

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

United Airlines

7.4

Good

8,937 reviews

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

WestJet

7.2

Good

3,091 reviews

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Air Canada

7.1

Good

10,000 reviews

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

How long is the flight from Ottawa to Seattle?
There are many flights that can get you from Ottawa to Seattle in 7h 31m. Fly via WestJet or Air Canada to get the fastest option. The distance between Ottawa and Seattle is about 3529 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Ottawa to Seattle round-trip?
According to our current data, WestJet (C$ 367), Air Canada (C$ 408), and United Airlines (C$ 421) offers the cheapest pricing from Ottawa to Seattle. You may be able to fly from Ottawa to Seattle for 38% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Ottawa to Seattle one-way?
C$ 209 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from C$ 240 and C$ 256, 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$ 262). Flying from Ottawa to Seattle in December is currently the most expensive (average of C$ 353). 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.

See more FAQs

Leavenworth

SeaTac

Tukwila

Tacoma

Bothell

Cashmere

Renton

Olympia

Marysville

Lynnwood

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ottawa to Seattle

Complete your trip

Seattle car rentals

Seattle/Tacoma Intl Airport car rentals

Kenmore Air Harbor Airport car rentals

Bellingham car rentals

Pasco car rentals

Port Angeles car rentals

Spokane car rentals

Yakima car rentals

Downtown car rentals

Capitol Hill car rentals

West Seattle car rentals

University District car rentals

Other flights to Seattle

Top 3 airlines flying from Ottawa to Seattle

Airline	Cheapest	Average	Flexibility	On-time
WestJet	CheapestC$ 367	AverageC$ 552	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Air Canada	CheapestC$ 408	AverageC$ 606	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 421	AverageC$ 590	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

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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Cheap flights from Ottawa to Seattle from C$ 209

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 20/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Ottawa to Seattle/Tacoma Intl are usually found in October or September, booked 32 days in advance, depart on a Thursday or Friday and return on a Monday

Cheap flight deals from Ottawa to Seattle

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ottawa to Seattle

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 11 September 2025.

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 11 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to Seattle that are best for you.

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.

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?

What is the cheapest month to book a flight from Ottawa to Seattle?

What is the cheapest time of day to fly from YOW to SEA?

How much does it cost to fly round-trip from Ottawa to Seattle?

What’s the top layover airport for flights from Ottawa to Seattle?

What’s the fastest layover option from Ottawa to Seattle?

What’s the fastest layover option from Ottawa to Seattle?

Which airport typically offers the quickest layover for flights from Ottawa to Seattle?

Reviews of airlines servicing Seattle

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.

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?

What are the cheapest airlines flying from Ottawa to Seattle round-trip?

What are the cheapest airlines to fly from Ottawa to Seattle one-way?

Can I find deals for flights from Ottawa to Seattle that include hotel bookings?

How can I find direct flights from Ottawa to Seattle?

Can I find deals for business class flights from Ottawa to Seattle?

What is the cheapest month to book a flight from Ottawa to Seattle?

Travelling to a place near Seattle?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ottawa to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Ottawa to Seattle

Fly with Cheapflights

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?

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Seattle?

Can Cheapflights find flights from Ottawa to Seattle with no change fees?

Can Cheapflights notify me if prices for flights from Ottawa to Seattle become cheaper?

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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 11 September 2025.