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

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

Which 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 47% of people opting to fly with this airline when travelling 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?

The number of operators available for flights from Ottawa Airport to Washington is 4 as of September 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ottawa Airport to Washington.

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

The travel and health documents you'll need for your trip to Washington may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

C$ 234 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 a.m. - 1:40 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

10h 30m1 stop Calgary

2:30 p.m. - 2:30 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

21h 00m1 stop Calgary

C$ 441WestJet

Thu, 19 Nov - Mon, 23 Nov

6:10 a.m. - 1:40 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

10h 30m1 stop Calgary

2:30 p.m. - 2:30 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

21h 00m1 stop Calgary

C$ 443WestJet

Thu, 19 Nov - Mon, 23 Nov

6:10 a.m. - 1:40 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

10h 30m1 stop Calgary

2:30 p.m. - 2:30 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

21h 00m1 stop Calgary

C$ 448WestJet

Thu, 10 Dec - Tue, 15 Dec

6:15 p.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

27h 30m2 stops Edmonton Calgary

10:30 a.m. - 12:55 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

23h 25m1 stop Calgary

C$ 545Multiple Airlines

Fri, 9 Oct - Sun, 18 Oct

6:10 a.m. - 1:40 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

10h 30m1 stop Calgary

2:30 p.m. - 1:12 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

19h 42m1 stop Calgary

C$ 566Multiple Airlines

Fri, 20 Nov - Tue, 24 Nov

7:50 a.m. - 6:22 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

13h 32m2 stops Calgary Vancouver Intl

10:10 a.m. - 10:32 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

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

C$ 672Air Canada

Thu, 19 Nov - Mon, 23 Nov

9:45 a.m. - 10:51 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

16h 06m2 stops Washington, D.C. Dulles Intl Houston George Bush Intcntl

11:59 p.m. - 2:29 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

11h 30m2 stops Houston George Bush Intcntl Washington, D.C. Reagan-National

C$ 689United Airlines

Fri, 13 Nov - Sun, 22 Nov

6:00 a.m. - 5:57 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

14h 57m2 stops Newark Denver Intl

7:04 p.m. - 3:07 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

17h 03m2 stops Denver Intl Washington, D.C. Dulles Intl

C$ 689United Airlines

Fri, 13 Nov - Sun, 22 Nov

7:50 a.m. - 6:22 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

13h 32m2 stops Calgary Vancouver Intl

10:10 a.m. - 10:32 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

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

C$ 691Air Canada

Thu, 19 Nov - Mon, 23 Nov

5:35 a.m. - 6:35 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

16h 00m2 stops Toronto Pearson Intl Detroit Metropolitan Wayne County

7:15 a.m. - 12:01 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

13h 46m2 stops Los Angeles Calgary

C$ 2,316Delta

Tue, 27 Oct - Sat, 2 Jan

Cheap last-minute flights

Enter your travel dates to find the best prices.

8:15 p.m. - 9:40 a.m.YOW Ottawa-SEA Seattle/Tacoma Intl

16h 25m1 stop Calgary

7:35 p.m. - 5:58 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

19h 23m1 stop Calgary

C$ 1,004Multiple Airlines

Mon, 28 Sep - Thu, 8 Oct

8:15 p.m. - 9:40 a.m.YOW Ottawa-SEA Seattle/Tacoma Intl

16h 25m1 stop Calgary

7:55 p.m. - 12:55 p.m.SEA Seattle/Tacoma Intl-YOW Ottawa

38h 00m2 stops Vancouver Intl Calgary

C$ 1,044Multiple Airlines

Mon, 28 Sep - Thu, 8 Oct

1:20 p.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

7:35 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

C$ 1,079WestJet

Wed, 30 Sep - Wed, 7 Oct

1:20 p.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

10:30 a.m. - 12:20 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

10h 50m2 stops Calgary Toronto Pearson Intl

C$ 1,089WestJet

Wed, 30 Sep - Sun, 4 Oct

6:55 a.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

14h 50m2 stops Toronto Pearson Intl Calgary

7:35 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

C$ 1,094WestJet

Wed, 30 Sep - Wed, 7 Oct

6:55 a.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

14h 50m2 stops Toronto Pearson Intl Calgary

10:30 a.m. - 12:20 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

10h 50m2 stops Calgary Toronto Pearson Intl

C$ 1,104WestJet

Mon, 28 Sep - Thu, 8 Oct

6:55 a.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

14h 50m2 stops Toronto Pearson Intl Calgary

10:30 a.m. - 12:20 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

10h 50m2 stops Calgary Toronto Pearson Intl

C$ 1,104WestJet

Wed, 30 Sep - Wed, 7 Oct

6:55 a.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

14h 50m2 stops Toronto Pearson Intl Calgary

10:30 a.m. - 12:20 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

10h 50m2 stops Calgary Toronto Pearson Intl

C$ 1,107WestJet

Wed, 30 Sep - Sun, 4 Oct

1:20 p.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

7:35 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

C$ 1,118WestJet

Wed, 30 Sep - Sun, 4 Oct

8:15 p.m. - 9:40 a.m.YOW Ottawa-SEA Seattle/Tacoma Intl

16h 25m1 stop Calgary

3:35 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

11h 00m1 stop Calgary

C$ 1,124Multiple Airlines

Mon, 28 Sep - Tue, 29 Sep

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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

19 Nov

YOW6:10 a.m.Ottawa

10h 30m

1 stop

SEA1:40 p.m.Seattle/Tacoma Intl

23 Nov

SEA2:30 p.m.Seattle/Tacoma Intl

21h 00m

1 stop

YOW2:30 p.m.Ottawa

C$ 441

WestJet

19 Nov

YOW6:10 a.m.Ottawa

10h 30m

1 stop

SEA1:40 p.m.Seattle/Tacoma Intl

23 Nov

SEA2:30 p.m.Seattle/Tacoma Intl

21h 00m

1 stop

YOW2:30 p.m.Ottawa

C$ 443

WestJet

10 Dec

YOW6:10 a.m.Ottawa

10h 30m

1 stop

SEA1:40 p.m.Seattle/Tacoma Intl

15 Dec

SEA2:30 p.m.Seattle/Tacoma Intl

21h 00m

1 stop

YOW2:30 p.m.Ottawa

C$ 448

American Airlines flights from Ottawa to State of Washington

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

American Airlines

30 Sep

YOW7:00 a.m.Ottawa

14h 37m

2 stops

SEA6:37 p.m.Seattle/Tacoma Intl

4 Oct

SEA6:15 p.m.Seattle/Tacoma Intl

17h 40m

3 stops

YOW2:55 p.m.Ottawa

C$ 1,865

American Airlines

30 Sep

YOW7:00 a.m.Ottawa

16h 29m

3 stops

SEA8:29 p.m.Seattle/Tacoma Intl

4 Oct

SEA10:45 p.m.Seattle/Tacoma Intl

13h 10m

2 stops

YOW2:55 p.m.Ottawa

C$ 1,920

American Airlines

30 Sep

YOW7:00 a.m.Ottawa

16h 29m

3 stops

SEA8:29 p.m.Seattle/Tacoma Intl

4 Oct

SEA10:45 p.m.Seattle/Tacoma Intl

13h 10m

2 stops

YOW2:55 p.m.Ottawa

C$ 1,953

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 19/11

6:10 a.m.-1:40 p.m.

1 stop10h 30m

Seattle/Tacoma Intl

Mon 23/11

2:30 p.m.-2:30 p.m.

1 stop21h 00m

C$ 441

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 19/11

6:10 a.m.-1:40 p.m.

1 stop10h 30m

Seattle/Tacoma Intl

Mon 23/11

2:30 p.m.-2:30 p.m.

1 stop21h 00m

C$ 443

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 10/12

6:10 a.m.-1:40 p.m.

1 stop10h 30m

Seattle/Tacoma Intl

Tue 15/12

2:30 p.m.-2:30 p.m.

1 stop21h 00m

C$ 448

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 9/10

6:15 p.m.-6:45 p.m.

2 stops27h 30m

Seattle/Tacoma Intl

Sun 18/10

10:30 a.m.-12:55 p.m.

1 stop23h 25m

C$ 545

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 20/11

6:10 a.m.-1:40 p.m.

1 stop10h 30m

Seattle/Tacoma Intl

Tue 24/11

2:30 p.m.-1:12 p.m.

1 stop19h 42m

C$ 566

Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 19/11

7:50 a.m.-6:22 p.m.

2 stops13h 32m

Seattle/Tacoma Intl

Mon 23/11

10:10 a.m.-10:32 p.m.

2 stops9h 22m

C$ 672

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 13/11

9:45 a.m.-10:51 p.m.

2 stops16h 06m

Seattle/Tacoma Intl

Sun 22/11

11:59 p.m.-2:29 p.m.

2 stops11h 30m

C$ 689

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 13/11

6:00 a.m.-5:57 p.m.

2 stops14h 57m

Seattle/Tacoma Intl

Sun 22/11

7:04 p.m.-3:07 p.m.

2 stops17h 03m

C$ 689

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 19/11

7:50 a.m.-6:22 p.m.

2 stops13h 32m

Seattle/Tacoma Intl

Mon 23/11

10:10 a.m.-10:32 p.m.

2 stops9h 22m

C$ 691

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Tue 27/10

5:35 a.m.-6:35 p.m.

2 stops16h 00m

Seattle/Tacoma Intl

Sat 2/1

7:15 a.m.-12:01 a.m.

2 stops13h 46m

C$ 2,316

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?

In general, January is the cheapest month to fly from Ottawa to State of Washington. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 402. If you’re not able to fly to State of Washington in January, then February is your next best option. Flight prices from Ottawa to State of Washington during February average around C$ 477.

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 C$ 630 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 C$ 436 on momondo.

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

You could potentially save up to 2% 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

Best price found	C$ 234
Fastest flight time	8h 25m
Direct flights	None

The best one-way flight to State of Washington from Ottawa in the past 72 hours is C$ 234. The best round-trip flight deal from Ottawa to State of Washington found on momondo in the last 72 hours is C$ 441.

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

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?
The number of operators available for flights from Ottawa Airport to Washington is 4 as of September 2026.
How old do you have to be to fly from Ottawa Airport to Washington?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ottawa Airport to Washington.
What documentation or ID do you need to fly to Washington?
The travel and health documents you'll need for your trip to Washington may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington. It is always advisable to seek 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 C$ 255	Free Cancellation	Rating 7.1 11,676 reviews	Search Air Canada flights
United Airlines	PriceFrom C$ 257	Free Cancellation	Rating 7.4 10,233 reviews	Search United Airlines flights
WestJet	PriceFrom C$ 311	Free Cancellation	Rating 7.2 3,448 reviews	Search WestJet flights
Delta	PriceFrom C$ 401	Free Cancellation	Rating 7.8 8,593 reviews	Search Delta flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington from Ottawa.

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

Yes. All flights to Washington from Ottawa on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for Ottawa to Washington flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Ottawa to Washington flights. All you need is a valid email address and we will do the rest; it is that quick and easy.