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

WestJet, 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 United Airlines 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 63% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 4 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 August 2026, there are 3 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.

$178 Cheap Flights from Ottawa to Washington in 2026

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.

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

$331WestJet

Wed, Sep 23 - Wed, Sep 30

12:25 pm - 9:00 pmYOW Ottawa-SEA Seattle/Tacoma Intl

11h 35m2 stops Winnipeg Calgary

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

7h 00m1 stop Calgary

$332WestJet

Thu, Sep 3 - Thu, Sep 10

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

$334WestJet

Mon, Sep 21 - Mon, Sep 28

2:45 pm - 10:47 pmYOW Ottawa-SEA Seattle/Tacoma Intl

11h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

8:00 am - 7:10 pmSEA Seattle/Tacoma Intl-YOW Ottawa

8h 10m1 stop Toronto Pearson Intl

$408Air Canada

Thu, Sep 17 - Thu, Sep 24

6:00 am - 7:15 pmYOW Ottawa-SEA Seattle/Tacoma Intl

16h 15m3 stops Washington, D.C. Dulles Intl Indianapolis Chicago O'Hare Intl

11:04 pm - 9:56 amSEA Seattle/Tacoma Intl-YOW Ottawa

7h 52m1 stop Washington, D.C. Dulles Intl

$416United Airlines

Tue, Sep 22 - Wed, Sep 23

6:25 am - 7:08 pmYOW Ottawa-SEA Seattle/Tacoma Intl

15h 43m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

11:04 pm - 9:56 amSEA Seattle/Tacoma Intl-YOW Ottawa

7h 52m1 stop Washington, D.C. Dulles Intl

$416United Airlines

Tue, Sep 22 - Wed, Sep 23

2:45 pm - 10:47 pmYOW Ottawa-SEA Seattle/Tacoma Intl

11h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

10:50 am - 1:35 amSEA Seattle/Tacoma Intl-YOW Ottawa

11h 45m2 stops Vancouver Intl Toronto Pearson Intl

$427Air Canada

Thu, Sep 17 - Thu, Sep 24

2:00 pm - 10:05 amYOW Ottawa-SEA Seattle/Tacoma Intl

23h 05m3 stops Hamilton Calgary Vancouver Intl

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

7h 00m1 stop Calgary

$447Multiple Airlines

Mon, Sep 21 - Mon, Sep 28

2:45 pm - 10:47 pmYOW Ottawa-SEA Seattle/Tacoma Intl

11h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

5:50 am - 5:35 amSEA Seattle/Tacoma Intl-YOW Ottawa

20h 45m3 stops Vancouver Intl Edmonton Calgary

$450Multiple Airlines

Thu, Sep 17 - Thu, Sep 24

2:45 pm - 10:47 pmYOW Ottawa-SEA Seattle/Tacoma Intl

11h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

7:15 pm - 11:15 amSEA Seattle/Tacoma Intl-YOW Ottawa

13h 00m2 stops Vancouver Intl Toronto Pearson Intl

$554Air Canada

Tue, Sep 22 - Wed, Sep 23

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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

Sep 23

YOW1:20 pmOttawa

8h 25m

1 stop

SEA6:45 pmSeattle/Tacoma Intl

Sep 30

SEA7:35 pmSeattle/Tacoma Intl

7h 00m

1 stop

YOW5:35 amOttawa

$331

WestJet

Sep 3

YOW12:25 pmOttawa

11h 35m

2 stops

SEA9:00 pmSeattle/Tacoma Intl

Sep 10

SEA7:35 pmSeattle/Tacoma Intl

7h 00m

1 stop

YOW5:35 amOttawa

$332

WestJet

Sep 21

YOW6:55 amOttawa

14h 50m

2 stops

SEA6:45 pmSeattle/Tacoma Intl

Sep 28

SEA7:35 pmSeattle/Tacoma Intl

7h 00m

1 stop

YOW5:35 amOttawa

$334

Air Canada flights from Ottawa to State of Washington

Our best Air Canada deals on Ottawa to State of Washington flight tickets

Air Canada

Sep 17

YOW2:45 pmOttawa

11h 02m

2 stops

SEA10:47 pmSeattle/Tacoma Intl

Sep 24

SEA8:00 amSeattle/Tacoma Intl

8h 10m

1 stop

YOW7:10 pmOttawa

$408

Air Canada

Aug 21

YOW6:25 amOttawa

8h 03m

1 stop

PDX11:28 amPortland

Aug 29

PDX11:02 pmPortland

15h 14m

1 stop

YOW5:16 pmOttawa

$565

Air Canada

Aug 29

YOW9:55 amOttawa

11h 58m

2 stops

PDX6:53 pmPortland

Aug 31

PDX11:02 pmPortland

11h 15m

2 stops

YOW1:17 pmOttawa

$578

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 9/23

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Wed 9/30

7:35 pm-5:35 am

1 stop7h 00m

$331

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 9/3

12:25 pm-9:00 pm

2 stops11h 35m

Seattle/Tacoma Intl

Thu 9/10

7:35 pm-5:35 am

1 stop7h 00m

$332

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 9/21

6:55 am-6:45 pm

2 stops14h 50m

Seattle/Tacoma Intl

Mon 9/28

7:35 pm-5:35 am

1 stop7h 00m

$334

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 9/17

2:45 pm-10:47 pm

2 stops11h 02m

Seattle/Tacoma Intl

Thu 9/24

8:00 am-7:10 pm

1 stop8h 10m

$408

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Tue 9/22

6:00 am-7:15 pm

3 stops16h 15m

Seattle/Tacoma Intl

Wed 9/23

11:04 pm-9:56 am

1 stop7h 52m

$416

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Tue 9/22

6:25 am-7:08 pm

2 stops15h 43m

Seattle/Tacoma Intl

Wed 9/23

11:04 pm-9:56 am

1 stop7h 52m

$416

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 9/17

2:45 pm-10:47 pm

2 stops11h 02m

Seattle/Tacoma Intl

Thu 9/24

10:50 am-1:35 am

2 stops11h 45m

$427

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 9/21

2:00 pm-10:05 am

3 stops23h 05m

Seattle/Tacoma Intl

Mon 9/28

7:35 pm-5:35 am

1 stop7h 00m

$447

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 9/17

2:45 pm-10:47 pm

2 stops11h 02m

Seattle/Tacoma Intl

Thu 9/24

5:50 am-5:35 am

3 stops20h 45m

$450

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Tue 9/22

2:45 pm-10:47 pm

2 stops11h 02m

Seattle/Tacoma Intl

Wed 9/23

7:15 pm-11:15 am

2 stops13h 00m

$554

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 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 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 $438 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 17% 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 37m
Direct flights	None

The fastest flight from Ottawa to State of Washington takes 7h 37m

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 August 2026, there are 3 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
United Airlines	PriceFrom $275	Free Cancellation	Rating 7.4 10,086 reviews	Search United Airlines flights
Air Canada	PriceFrom $304	Free Cancellation	Rating 7.1 11,452 reviews	Search Air Canada flights
WestJet	PriceFrom $358	Free Cancellation	Rating 7.2 3,426 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.