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Cheap flights from Ottawa to Washington from $143

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 2/1. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m2 stops
WestJet Logo
3:10 pm - 4:53 pm
SEA
-
YOW
22h 43m1 stop
$240WestJet
Wed, Apr 8 - Tue, Apr 14
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m2 stops
WestJet Logo
3:10 pm - 12:39 am
SEA
-
YOW
30h 29m2 stops
$245WestJet
Wed, Apr 8 - Tue, Apr 14
WestJet Logo
5:15 pm - 8:28 pm
YOW
-
SEA
30h 13m2 stops
WestJet Logo
7:05 am - 5:28 am
SEA
-
YOW
19h 23m2 stops
$248WestJet
Fri, May 15 - Tue, May 19
WestJet Logo
6:15 am - 1:08 pm
YOW
-
SEA
33h 53m2 stops
WestJet Logo
7:05 am - 12:40 am
SEA
-
YOW
14h 35m1 stop
$250WestJet
Fri, May 15 - Tue, May 19
WestJet Logo
3:45 pm - 1:08 pm
YOW
-
SEA
24h 23m1 stop
WestJet Logo
7:05 am - 2:55 pm
SEA
-
YOW
28h 50m1 stop
$252WestJet
Fri, May 15 - Tue, May 19
Air Canada Logo
4:15 pm - 10:16 pm
YOW
-
SEA
9h 01m1 stop
Air Canada Logo
5:50 am - 3:46 pm
SEA
-
YOW
6h 56m1 stop
$273Air Canada
Tue, Jan 13 - Tue, Jan 20
Air Canada Logo
4:15 pm - 10:16 pm
YOW
-
SEA
9h 01m1 stop
Air Canada Logo
5:50 am - 7:15 pm
SEA
-
YOW
10h 25m2 stops
$281Air Canada
Tue, Jan 13 - Tue, Jan 20
United Airlines Logo
6:20 am - 3:27 pm
YOW
-
PDX
12h 07m1 stop
United Airlines Logo
3:50 pm - 10:26 am
PDX
-
YOW
15h 36m2 stops
$438United Airlines
Wed, Feb 18 - Mon, Feb 23
United Airlines Logo
6:20 am - 10:32 pm
YOW
-
PDX
19h 12m1 stop
United Airlines Logo
7:00 am - 9:18 pm
PDX
-
YOW
11h 18m1 stop
$454United Airlines
Mon, Jan 19 - Wed, Jan 21
Multiple Airlines Logo
3:55 pm - 7:44 pm
YOW
-
PDX
30h 49m1 stop
Multiple Airlines Logo
5:35 pm - 2:45 pm
PDX
-
YOW
18h 10m2 stops
$555Multiple Airlines
Mon, Jan 5 - Wed, Jan 14

Air Canada flights from Ottawa to State of Washington

Our best Air Canada deals on Ottawa to State of Washington flight tickets
Air Canada
Jan 13
YOW4:15 pmOttawa
9h 01m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
Jan 20
SEA5:50 amSeattle/Tacoma Intl
6h 56m
1 stop
YOW3:46 pmOttawa
$273
Find similar
Air Canada
Jan 13
YOW4:15 pmOttawa
9h 01m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
Jan 20
SEA5:50 amSeattle/Tacoma Intl
10h 25m
2 stops
YOW7:15 pmOttawa
$281
Find similar
Air Canada
Jan 31
YOW5:35 pmOttawa
18h 56m
2 stops
SEA9:31 amSeattle/Tacoma Intl
Feb 7
SEA5:50 amSeattle/Tacoma Intl
6h 55m
1 stop
YOW3:45 pmOttawa
$297
Find similar

United Airlines flights from Ottawa to State of Washington

Our best United Airlines deals on Ottawa to State of Washington flight tickets
United Airlines
Jan 20
YOW7:27 pmOttawa
25h 59m
2 stops
SEA6:26 pmSeattle/Tacoma Intl
Jan 22
SEA7:00 amSeattle/Tacoma Intl
11h 18m
1 stop
YOW9:18 pmOttawa
$300
Find similar
United Airlines
Feb 3
YOW5:11 pmOttawa
21h 18m
2 stops
SEA11:29 amSeattle/Tacoma Intl
Feb 4
SEA3:30 pmSeattle/Tacoma Intl
22h 42m
2 stops
YOW5:12 pmOttawa
$307
Find similar
United Airlines
Feb 18
YOW6:20 amOttawa
12h 07m
1 stop
PDX3:27 pmPortland
Feb 23
PDX3:50 pmPortland
15h 36m
2 stops
YOW10:26 amOttawa
$438
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 December 18, 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

Wed 4/8

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 4/14

3:10 pm-4:53 pm

1 stop22h 43m

$240

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 4/8

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 4/14

3:10 pm-12:39 am

2 stops30h 29m

$245

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

5:15 pm-8:28 pm

2 stops30h 13m

Seattle/Tacoma Intl

Tue 5/19

7:05 am-5:28 am

2 stops19h 23m

$248

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

6:15 am-1:08 pm

2 stops33h 53m

Seattle/Tacoma Intl

Tue 5/19

7:05 am-12:40 am

1 stop14h 35m

$250

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

3:45 pm-1:08 pm

1 stop24h 23m

Seattle/Tacoma Intl

Tue 5/19

7:05 am-2:55 pm

1 stop28h 50m

$252

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 1/13

4:15 pm-10:16 pm

1 stop9h 01m

Seattle/Tacoma Intl

Tue 1/20

5:50 am-3:46 pm

1 stop6h 56m

$273

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 1/13

4:15 pm-10:16 pm

1 stop9h 01m

Seattle/Tacoma Intl

Tue 1/20

5:50 am-7:15 pm

2 stops10h 25m

$281

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Wed 2/18

6:20 am-3:27 pm

1 stop12h 07m

Portland

Mon 2/23

3:50 pm-10:26 am

2 stops15h 36m

$438

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Mon 1/19

6:20 am-10:32 pm

1 stop19h 12m

Portland

Wed 1/21

7:00 am-9:18 pm

1 stop11h 18m

$454

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Mon 1/5

3:55 pm-7:44 pm

1 stop30h 49m

Portland

Wed 1/14

5:35 pm-2:45 pm

2 stops18h 10m

$555

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 January is also cheap. Prices for this month can be found on momondo for an average of $362.

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 $412 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 44% 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

7h 43m

Direct flights

None
The fastest flight from Ottawa to State of Washington takes 7h 43m
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
9,092 reviews
Search United Airlines flights
WestJetPriceFrom $277Free CancellationRating
7.2
3,204 reviews
Search WestJet flights
Air CanadaPriceFrom $290Free CancellationRating
7.1
10,534 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.

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