What is the cheapest airline that flies from Ottawa to Washington?

United Airlines and Air Canada are the most popular carriers operating from Ottawa to Washington

What airlines fly to State of Washington?

Air Canada, WestJet and Delta are the top three most popular airlines that fly to State of Washington from Ottawa according to our data. Air Canada is the first choice among our users, with 66% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 3 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

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?

As of September 2026, there are 2 operators available to choose from 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.

$166 Cheap Flights from Ottawa to Washington in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ottawa to Washington

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:10 am - 1:40 pmYOW Ottawa-SEA Seattle/Tacoma Intl

10h 30m1 stop Calgary

2:30 pm - 2:30 pmSEA Seattle/Tacoma Intl-YOW Ottawa

21h 00m1 stop Calgary

$312WestJet

Thu, Nov 19 - Mon, Nov 23

6:10 am - 1:40 pmYOW Ottawa-SEA Seattle/Tacoma Intl

10h 30m1 stop Calgary

2:30 pm - 2:30 pmSEA Seattle/Tacoma Intl-YOW Ottawa

21h 00m1 stop Calgary

$314WestJet

Thu, Nov 19 - Mon, Nov 23

6:10 am - 1:40 pmYOW Ottawa-SEA Seattle/Tacoma Intl

10h 30m1 stop Calgary

2:30 pm - 2:30 pmSEA Seattle/Tacoma Intl-YOW Ottawa

21h 00m1 stop Calgary

$317WestJet

Thu, Dec 10 - Tue, Dec 15

6:10 am - 1:40 pmYOW Ottawa-SEA Seattle/Tacoma Intl

10h 30m1 stop Calgary

2:30 pm - 2:30 pmSEA Seattle/Tacoma Intl-YOW Ottawa

21h 00m1 stop Calgary

$324WestJet

Thu, Nov 19 - Mon, Nov 23

1:20 pm - 6:45 pmYOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

8:02 am - 1:00 amSEA Seattle/Tacoma Intl-YOW Ottawa

13h 58m1 stop Calgary

$382Multiple Airlines

Fri, Oct 23 - Sat, Oct 31

6:15 pm - 6:45 pmYOW Ottawa-SEA Seattle/Tacoma Intl

27h 30m2 stops Edmonton Calgary

10:30 am - 12:55 pmSEA Seattle/Tacoma Intl-YOW Ottawa

23h 25m1 stop Calgary

$386Multiple Airlines

Fri, Oct 9 - Sun, Oct 18

1:20 pm - 6:45 pmYOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

8:02 am - 1:00 amSEA Seattle/Tacoma Intl-YOW Ottawa

13h 58m1 stop Calgary

$389Multiple Airlines

Fri, Oct 23 - Sat, Oct 31

7:50 am - 6:22 pmYOW Ottawa-SEA Seattle/Tacoma Intl

13h 32m2 stops Calgary Vancouver Intl

10:10 am - 10:32 pmSEA Seattle/Tacoma Intl-YOW Ottawa

9h 22m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$489Air Canada

Thu, Nov 19 - Mon, Nov 23

7:50 am - 6:22 pmYOW Ottawa-SEA Seattle/Tacoma Intl

13h 32m2 stops Calgary Vancouver Intl

8:40 am - 11:11 pmSEA Seattle/Tacoma Intl-YOW Ottawa

11h 31m2 stops Vancouver Intl Calgary

$494Air Canada

Sun, Oct 25 - Wed, Jan 6

7:50 am - 6:22 pmYOW Ottawa-SEA Seattle/Tacoma Intl

13h 32m2 stops Calgary Vancouver Intl

8:40 am - 11:11 pmSEA Seattle/Tacoma Intl-YOW Ottawa

11h 31m2 stops Vancouver Intl Calgary

$494Air Canada

Sun, Oct 25 - Tue, Jan 5

Cheap last minute flights

Enter your travel dates to find the best prices.

8:15 pm - 9:40 amYOW Ottawa-SEA Seattle/Tacoma Intl

16h 25m1 stop Calgary

7:35 pm - 5:58 pmSEA Seattle/Tacoma Intl-YOW Ottawa

19h 23m1 stop Calgary

$711Multiple Airlines

Mon, Sep 28 - Thu, Oct 8

8:15 pm - 9:40 amYOW Ottawa-SEA Seattle/Tacoma Intl

16h 25m1 stop Calgary

7:55 pm - 12:55 pmSEA Seattle/Tacoma Intl-YOW Ottawa

38h 00m2 stops Vancouver Intl Calgary

$739Multiple Airlines

Mon, Sep 28 - Thu, Oct 8

1:20 pm - 6:45 pmYOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

7:35 pm - 5:35 amSEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

$764WestJet

Wed, Sep 30 - Wed, Oct 7

1:20 pm - 6:45 pmYOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

10:30 am - 12:20 amSEA Seattle/Tacoma Intl-YOW Ottawa

10h 50m2 stops Calgary Toronto Pearson Intl

$771WestJet

Wed, Sep 30 - Sun, Oct 4

6:55 am - 6:45 pmYOW Ottawa-SEA Seattle/Tacoma Intl

14h 50m2 stops Toronto Pearson Intl Calgary

7:35 pm - 5:35 amSEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

$775WestJet

Wed, Sep 30 - Wed, Oct 7

6:55 am - 6:45 pmYOW Ottawa-SEA Seattle/Tacoma Intl

14h 50m2 stops Toronto Pearson Intl Calgary

10:30 am - 12:20 amSEA Seattle/Tacoma Intl-YOW Ottawa

10h 50m2 stops Calgary Toronto Pearson Intl

$782WestJet

Mon, Sep 28 - Thu, Oct 8

6:55 am - 6:45 pmYOW Ottawa-SEA Seattle/Tacoma Intl

14h 50m2 stops Toronto Pearson Intl Calgary

10:30 am - 12:20 amSEA Seattle/Tacoma Intl-YOW Ottawa

10h 50m2 stops Calgary Toronto Pearson Intl

$782WestJet

Wed, Sep 30 - Wed, Oct 7

6:55 am - 6:45 pmYOW Ottawa-SEA Seattle/Tacoma Intl

14h 50m2 stops Toronto Pearson Intl Calgary

10:30 am - 12:20 amSEA Seattle/Tacoma Intl-YOW Ottawa

10h 50m2 stops Calgary Toronto Pearson Intl

$784WestJet

Wed, Sep 30 - Sun, Oct 4

1:20 pm - 6:45 pmYOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

7:35 pm - 5:35 amSEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

$792WestJet

Wed, Sep 30 - Sun, Oct 4

8:15 pm - 9:40 amYOW Ottawa-SEA Seattle/Tacoma Intl

16h 25m1 stop Calgary

3:35 pm - 5:35 amSEA Seattle/Tacoma Intl-YOW Ottawa

11h 00m1 stop Calgary

$796Multiple Airlines

Mon, Sep 28 - Tue, Sep 29

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WestJet flights from Ottawa to State of Washington

Our best WestJet deals on Ottawa to State of Washington flight tickets

WestJet

Nov 19

YOW6:10 amOttawa

10h 30m

1 stop

SEA1:40 pmSeattle/Tacoma Intl

Nov 23

SEA2:30 pmSeattle/Tacoma Intl

21h 00m

1 stop

YOW2:30 pmOttawa

$312

WestJet

Nov 19

YOW6:10 amOttawa

10h 30m

1 stop

SEA1:40 pmSeattle/Tacoma Intl

Nov 23

SEA2:30 pmSeattle/Tacoma Intl

21h 00m

1 stop

YOW2:30 pmOttawa

$314

WestJet

Dec 10

YOW6:10 amOttawa

10h 30m

1 stop

SEA1:40 pmSeattle/Tacoma Intl

Dec 15

SEA2:30 pmSeattle/Tacoma Intl

21h 00m

1 stop

YOW2:30 pmOttawa

$317

United Airlines flights from Ottawa to State of Washington

Our best United Airlines deals on Ottawa to State of Washington flight tickets

United Airlines

Oct 14

YOW6:00 amOttawa

15h 52m

3 stops

SEA6:52 pmSeattle/Tacoma Intl

Oct 16

SEA6:05 pmSeattle/Tacoma Intl

12h 51m

2 stops

YOW9:56 amOttawa

$396

United Airlines

Oct 23

YOW6:00 amOttawa

12h 51m

1 stop

SEA3:51 pmSeattle/Tacoma Intl

Nov 1

SEA10:56 pmSeattle/Tacoma Intl

12h 13m

1 stop

YOW2:09 pmOttawa

$399

United Airlines

Oct 23

YOW6:00 amOttawa

12h 51m

1 stop

SEA3:51 pmSeattle/Tacoma Intl

Nov 1

SEA10:56 pmSeattle/Tacoma Intl

12h 13m

1 stop

YOW2:09 pmOttawa

$400

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 11/19

6:10 am-1:40 pm

1 stop10h 30m

Seattle/Tacoma Intl

Mon 11/23

2:30 pm-2:30 pm

1 stop21h 00m

$312

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 11/19

6:10 am-1:40 pm

1 stop10h 30m

Seattle/Tacoma Intl

Mon 11/23

2:30 pm-2:30 pm

1 stop21h 00m

$314

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 12/10

6:10 am-1:40 pm

1 stop10h 30m

Seattle/Tacoma Intl

Tue 12/15

2:30 pm-2:30 pm

1 stop21h 00m

$317

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 11/19

6:10 am-1:40 pm

1 stop10h 30m

Seattle/Tacoma Intl

Mon 11/23

2:30 pm-2:30 pm

1 stop21h 00m

$324

Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 10/23

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Sat 10/31

8:02 am-1:00 am

1 stop13h 58m

$382

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 10/9

6:15 pm-6:45 pm

2 stops27h 30m

Seattle/Tacoma Intl

Sun 10/18

10:30 am-12:55 pm

1 stop23h 25m

$386

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 10/23

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Sat 10/31

8:02 am-1:00 am

1 stop13h 58m

$389

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 11/19

7:50 am-6:22 pm

2 stops13h 32m

Seattle/Tacoma Intl

Mon 11/23

10:10 am-10:32 pm

2 stops9h 22m

$489

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 10/25

7:50 am-6:22 pm

2 stops13h 32m

Seattle/Tacoma Intl

Wed 1/6

8:40 am-11:11 pm

2 stops11h 31m

$494

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 10/25

7:50 am-6:22 pm

2 stops13h 32m

Seattle/Tacoma Intl

Tue 1/5

8:40 am-11:11 pm

2 stops11h 31m

$494

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 $285. If you aren’t able to travel to State of Washington during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $338.

How far in advance should I book a flight from Ottawa to 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 $446 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.

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

Best Price Found	$166
Fastest flight time	8h 02m
Direct flights	None

The best one-way flight to State of Washington from Ottawa in the past 72 hours is $166. The best round-trip flight deal from Ottawa to State of Washington found on momondo in the last 72 hours is $312.

The fastest flight from Ottawa to State of Washington takes 8h 02m

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

Frequently asked questions about flying from Ottawa to Washington

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?
As of September 2026, there are 2 operators available to choose from 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
Air Canada	PriceFrom $290	Free Cancellation	Rating 7.1 11,683 reviews		Search Air Canada flights
WestJet	PriceFrom $336	Free Cancellation	Rating 7.2 3,448 reviews		Search WestJet 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.