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Cheap flights from Ottawa to Washington from $227

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to Washington departing on 2/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
5:40 am - 2:19 pmYOW-SEA
11h 39m2 stops
WestJet Logo
3:10 pm - 4:53 pmSEA-YOW
22h 43m1 stop
$227WestJet
Find Deal
Fri, Feb 20 - Tue, Feb 24
WestJet Logo
6:00 am - 2:19 pmYOW-SEA
11h 19m1 stop
WestJet Logo
3:10 pm - 4:53 pmSEA-YOW
22h 43m1 stop
$249WestJet
Find Deal
Fri, Feb 20 - Tue, Feb 24
Air Canada Logo
5:45 am - 2:31 pmYOW-SEA
11h 46m2 stops
Air Canada Logo
8:00 pm - 9:23 amSEA-YOW
10h 23m2 stops
$278Air Canada
Find Deal
Fri, Feb 20 - Tue, Feb 24
Air Canada Logo
5:50 pm - 10:08 pmYOW-SEA
7h 18m1 stop
Air Canada Logo
5:50 am - 3:45 pmSEA-YOW
6h 55m1 stop
$305Air Canada
Find Deal
Tue, Apr 14 - Wed, Apr 15
Multiple Airlines Logo
6:55 pm - 2:20 pmYOW-SEA
22h 25m1 stop
Multiple Airlines Logo
8:00 am - 12:42 amSEA-YOW
13h 42m1 stop
$464Multiple Airlines
Find Deal
Mon, Dec 15 - Wed, Dec 31
Multiple Airlines Logo
7:15 pm - 2:20 pmYOW-SEA
22h 05m2 stops
Multiple Airlines Logo
8:00 am - 12:42 amSEA-YOW
13h 42m1 stop
$488Multiple Airlines
Find Deal
Mon, Dec 15 - Wed, Dec 31
United Airlines Logo
6:20 am - 6:32 pmYOW-SEA
15h 12m2 stops
United Airlines Logo
5:02 am - 9:56 pmSEA-YOW
13h 54m2 stops
$532United Airlines
Find Deal
Mon, Dec 15 - Wed, Dec 31
United Airlines Logo
7:27 pm - 1:58 pmYOW-SEA
21h 31m2 stops
United Airlines Logo
11:15 pm - 6:52 pmSEA-YOW
16h 37m1 stop
$550United Airlines
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Tue, Dec 30 - Sun, Jan 4
American Airlines Logo
6:45 am - 7:44 pmYOW-SEA
15h 59m2 stops
American Airlines Logo
12:59 am - 4:49 pmSEA-YOW
12h 50m2 stops
$564American Airlines
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Fri, Nov 21 - Thu, Nov 27
American Airlines Logo
6:45 am - 8:37 pmYOW-SEA
16h 52m2 stops
American Airlines Logo
12:14 am - 4:51 pmSEA-YOW
13h 37m2 stops
$578American Airlines
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Mon, Dec 15 - Tue, Dec 30

WestJet flights from Ottawa to State of Washington

Our best WestJet deals on Ottawa to State of Washington flight tickets
WestJet
Feb 20
YOW5:40 amOttawa
11h 39m
2 stops
SEA2:19 pmSeattle/Tacoma Intl
Feb 24
SEA3:10 pmSeattle/Tacoma Intl
22h 43m
1 stop
YOW4:53 pmOttawa
$227
Find similar
WestJet
Feb 20
YOW6:00 amOttawa
11h 19m
1 stop
SEA2:19 pmSeattle/Tacoma Intl
Feb 24
SEA3:10 pmSeattle/Tacoma Intl
22h 43m
1 stop
YOW4:53 pmOttawa
$249
Find similar
WestJet
Nov 21
YOW7:15 pmOttawa
22h 25m
2 stops
SEA2:40 pmSeattle/Tacoma Intl
Nov 28
SEA3:10 pmSeattle/Tacoma Intl
30h 32m
2 stops
YOW12:42 amOttawa
$469
Find similar

Air Canada flights from Ottawa to State of Washington

Our best Air Canada deals on Ottawa to State of Washington flight tickets
Air Canada
Feb 20
YOW5:45 amOttawa
11h 46m
2 stops
SEA2:31 pmSeattle/Tacoma Intl
Feb 24
SEA8:00 pmSeattle/Tacoma Intl
10h 23m
2 stops
YOW9:23 amOttawa
$278
Find similar
Air Canada
Apr 14
YOW5:50 pmOttawa
7h 18m
1 stop
SEA10:08 pmSeattle/Tacoma Intl
Apr 15
SEA5:50 amSeattle/Tacoma Intl
6h 55m
1 stop
YOW3:45 pmOttawa
$305
Find similar
Air Canada
Apr 14
YOW5:50 pmOttawa
7h 18m
1 stop
SEA10:08 pmSeattle/Tacoma Intl
Apr 15
SEA10:10 amSeattle/Tacoma Intl
12h 24m
2 stops
YOW1:34 amOttawa
$311
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to State of Washington 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, momondo users made 832,500 searches. Data last updated November 3, 2025.
Use the filters below to find and compare flights from Ottawa to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 2/20

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 2/24

3:10 pm-4:53 pm

1 stop22h 43m

$227

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 2/20

6:00 am-2:19 pm

1 stop11h 19m

Seattle/Tacoma Intl

Tue 2/24

3:10 pm-4:53 pm

1 stop22h 43m

$249

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 2/20

5:45 am-2:31 pm

2 stops11h 46m

Seattle/Tacoma Intl

Tue 2/24

8:00 pm-9:23 am

2 stops10h 23m

$278

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 4/14

5:50 pm-10:08 pm

1 stop7h 18m

Seattle/Tacoma Intl

Wed 4/15

5:50 am-3:45 pm

1 stop6h 55m

$305

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 12/15

6:55 pm-2:20 pm

1 stop22h 25m

Seattle/Tacoma Intl

Wed 12/31

8:00 am-12:42 am

1 stop13h 42m

$464

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 12/15

7:15 pm-2:20 pm

2 stops22h 05m

Seattle/Tacoma Intl

Wed 12/31

8:00 am-12:42 am

1 stop13h 42m

$488

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 12/15

6:20 am-6:32 pm

2 stops15h 12m

Seattle/Tacoma Intl

Wed 12/31

5:02 am-9:56 pm

2 stops13h 54m

$532

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 12/30

7:27 pm-1:58 pm

2 stops21h 31m

Seattle/Tacoma Intl

Sun 1/4

11:15 pm-6:52 pm

1 stop16h 37m

$550

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 11/21

6:45 am-7:44 pm

2 stops15h 59m

Seattle/Tacoma Intl

Thu 11/27

12:59 am-4:49 pm

2 stops12h 50m

$564

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 12/15

6:45 am-8:37 pm

2 stops16h 52m

Seattle/Tacoma Intl

Tue 12/30

12:14 am-4:51 pm

2 stops13h 37m

$578

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington from

How to get the cheapest flight ticket from Ottawa to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to State of Washington?

The month of September is, on average, the cheapest month to fly to State of Washington from Ottawa, with most prices found around $340. If you aren’t able to travel to State of Washington during the month of September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $384.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from Ottawa to State of Washington is on a Saturday. Travelers who choose to depart for State of Washington on a Saturday will often find tickets for as low as $422. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Ottawa to State of Washington for around $577.

What is the cheapest time of day to depart on your flight to State of Washington?

The cheapest time of day to fly to State of Washington is in the evening when flights can be purchased for as low as $433. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $597 on average. Flights to State of Washington from Ottawa at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to State of Washington?

You are more likely to see cheaper flights to State of Washington from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $422 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Ottawa for as low as $309 on momondo.

Can stopping save me money on Ottawa to State of Washington flights?

You could potentially save up to 26% on your flight if you consider stops on a Ottawa to State of Washington flight.

Cheap Ottawa to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to State of Washington

Direct flights

None
There are no direct flights from Ottawa to State of Washington. There are no popular flight routes from Ottawa to State of Washington.
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  • When did momondo last update prices for flights from Ottawa Airport to Washington?

    Prices for flights from Ottawa Airport to Washington were last updated today.

  • How many operators does momondo search for flights from Ottawa Airport to Washington?

  • How old do you have to be to fly from Ottawa Airport to Washington?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ottawa Airport to Washington.

  • What documentation or ID do you need to fly to Washington?

    The necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ottawa to State of Washington

Compare and see reviews for airlines that fly from Ottawa to State of Washington with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $275Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
WestJetPriceFrom $277Free CancellationRating
7.2
3,153 reviews
Search WestJet flights
Air CanadaPriceFrom $290Free CancellationRating
7.1
10,392 reviews
Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to Washington?

Finding the right flight to Washington from Ottawa is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington quick and easy, saving you time and money.

Can I find flights from Ottawa to Washington with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ottawa to Washington flights to just show those with flexible booking policies.

How can momondo help me find flights from Ottawa to Washington?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington from Ottawa.

I’m not ready to book a flight from Ottawa to Washington right now. Can momondo alert me if prices change?

Price alerts on flights to Washington from Ottawa are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your State of Washington trip

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