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Cheap flights from Ottawa to Washington from $145

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to Washington departing on 3/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ottawa to Washington

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
WestJet Logo
7:35 pm - 5:40 am
SEA
-
YOW
7h 05m
1 stop
$229WestJet
Fri, May 29 - Mon, Jun 8
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
7:35 pm - 5:40 am
SEA
-
YOW
7h 05m
1 stop
$231WestJet
Thu, Apr 23 - Tue, Apr 28
WestJet Logo
6:15 pm - 6:45 pm
YOW
-
SEA
27h 30m
2 stops
WestJet Logo
7:35 pm - 5:40 am
SEA
-
YOW
7h 05m
1 stop
$247WestJet
Fri, May 29 - Mon, Jun 8
WestJet Logo
6:00 am - 2:19 pm
YOW
-
SEA
11h 19m
1 stop
WestJet Logo
7:35 pm - 5:40 am
SEA
-
YOW
7h 05m
1 stop
$255WestJet
Thu, Apr 23 - Tue, Apr 28
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
7:35 pm - 12:30 pm
SEA
-
YOW
13h 55m
2 stops
$256WestJet
Thu, Apr 23 - Tue, Apr 28
Multiple Airlines Logo
10:35 am - 8:58 am
YOW
-
PDX
25h 23m
1 stop
Multiple Airlines Logo
12:52 pm - 12:39 am
PDX
-
YOW
32h 47m
2 stops
$492Multiple Airlines
Thu, Mar 19 - Thu, Mar 26
Air Canada Logo
5:45 am - 2:40 pm
YOW
-
PDX
11h 55m
2 stops
Air Canada Logo
7:05 pm - 11:08 am
PDX
-
YOW
13h 03m
2 stops
$501Air Canada
Thu, Mar 19 - Thu, Mar 26
Air Canada Logo
7:45 am - 2:40 pm
YOW
-
PDX
9h 55m
1 stop
Air Canada Logo
7:05 pm - 6:43 am
PDX
-
YOW
8h 38m
1 stop
$518Air Canada
Tue, Mar 10 - Wed, Mar 11
Air Canada Logo
7:45 am - 2:40 pm
YOW
-
PDX
9h 55m
1 stop
Air Canada Logo
7:05 pm - 6:43 am
PDX
-
YOW
8h 38m
1 stop
$519Air Canada
Tue, Mar 10 - Wed, Mar 11
Air Canada Logo
5:45 am - 2:40 pm
YOW
-
PDX
11h 55m
2 stops
Air Canada Logo
7:05 pm - 6:43 am
PDX
-
YOW
8h 38m
1 stop
$521Air Canada
Tue, Mar 10 - Wed, Mar 11

United Airlines flights from Ottawa to State of Washington

Our best United Airlines deals on Ottawa to State of Washington flight tickets
United Airlines
Mar 3
YOW6:20 amOttawa
15h 43m
1 stop
SEA7:03 pmSeattle/Tacoma Intl
Mar 4
SEA8:17 amSeattle/Tacoma Intl
12h 37m
1 stop
YOW11:54 pmOttawa
$340
United Airlines
Apr 9
YOW2:40 pmOttawa
11h 16m
2 stops
SEA10:56 pmSeattle/Tacoma Intl
Apr 12
SEA10:35 pmSeattle/Tacoma Intl
12h 24m
1 stop
YOW1:59 pmOttawa
$341
United Airlines
Mar 12
YOW2:15 pmOttawa
9h 41m
1 stop
SEA8:56 pmSeattle/Tacoma Intl
Mar 16
SEA11:59 pmSeattle/Tacoma Intl
10h 19m
2 stops
YOW1:18 pmOttawa
$403

Air Canada flights from Ottawa to State of Washington

Our best Air Canada deals on Ottawa to State of Washington flight tickets
Air Canada
Mar 3
YOW5:50 pmOttawa
8h 07m
1 stop
SEA10:57 pmSeattle/Tacoma Intl
Mar 4
SEA8:00 pmSeattle/Tacoma Intl
7h 43m
1 stop
YOW6:43 amOttawa
$336
Air Canada
Feb 25
YOW7:15 amOttawa
15h 01m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
Mar 1
SEA8:00 amSeattle/Tacoma Intl
8h 18m
1 stop
YOW7:18 pmOttawa
$338
Air Canada
Mar 28
YOW4:15 pmOttawa
9h 01m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
Apr 4
SEA8:00 pmSeattle/Tacoma Intl
7h 45m
1 stop
YOW6:45 amOttawa
$344

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 February 5, 2026.
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 5/29

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Mon 6/8

7:35 pm-5:40 am

1 stop7h 05m

$229

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 4/23

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 4/28

7:35 pm-5:40 am

1 stop7h 05m

$231

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/29

6:15 pm-6:45 pm

2 stops27h 30m

Seattle/Tacoma Intl

Mon 6/8

7:35 pm-5:40 am

1 stop7h 05m

$247

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 4/23

6:00 am-2:19 pm

1 stop11h 19m

Seattle/Tacoma Intl

Tue 4/28

7:35 pm-5:40 am

1 stop7h 05m

$255

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 4/23

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 4/28

7:35 pm-12:30 pm

2 stops13h 55m

$256

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Thu 3/19

10:35 am-8:58 am

1 stop25h 23m

Portland

Thu 3/26

12:52 pm-12:39 am

2 stops32h 47m

$492

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Thu 3/19

5:45 am-2:40 pm

2 stops11h 55m

Portland

Thu 3/26

7:05 pm-11:08 am

2 stops13h 03m

$501

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Tue 3/10

7:45 am-2:40 pm

1 stop9h 55m

Portland

Wed 3/11

7:05 pm-6:43 am

1 stop8h 38m

$518

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Tue 3/10

7:45 am-2:40 pm

1 stop9h 55m

Portland

Wed 3/11

7:05 pm-6:43 am

1 stop8h 38m

$519

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Tue 3/10

5:45 am-2:40 pm

2 stops11h 55m

Portland

Wed 3/11

7:05 pm-6:43 am

1 stop8h 38m

$521

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 January is, on average, the cheapest month to fly to State of Washington from Ottawa, with most prices found around $318. If you aren’t able to travel to State of Washington during the month of January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $337.

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 $407 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 31% 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

Fastest flight time

8h 25m

Direct flights

None
The fastest flight from Ottawa to State of Washington takes 8h 25m
There are no direct flights from Ottawa to State of Washington. There are no popular flight routes from Ottawa to State of Washington.
Search flight deals

  • 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
9,240 reviews
Search United Airlines flights
WestJetPriceFrom $277Free CancellationRating
7.2
3,255 reviews
Search WestJet flights
Air CanadaPriceFrom $290Free CancellationRating
7.1
10,694 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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