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Cheap flights from Ottawa to Washington from C$ 294

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 15/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
5:40 a.m. - 2:19 p.m.YOW-SEA
11h 39m2 stops
WestJet Logo
3:10 p.m. - 4:53 p.m.SEA-YOW
22h 43m1 stop
C$ 318WestJet
Find Deal
Fri, 20 Feb - Tue, 24 Feb
Air Canada Logo
5:50 p.m. - 10:08 p.m.YOW-SEA
7h 18m1 stop
Air Canada Logo
8:00 p.m. - 6:43 a.m.SEA-YOW
7h 43m1 stop
C$ 340Air Canada
Find Deal
Tue, 14 Apr - Wed, 15 Apr
WestJet Logo
6:00 a.m. - 2:19 p.m.YOW-SEA
11h 19m1 stop
WestJet Logo
3:10 p.m. - 4:53 p.m.SEA-YOW
22h 43m1 stop
C$ 349WestJet
Find Deal
Fri, 20 Feb - Tue, 24 Feb
Air Canada Logo
5:45 a.m. - 2:31 p.m.YOW-SEA
11h 46m2 stops
Air Canada Logo
8:00 p.m. - 9:23 a.m.SEA-YOW
10h 23m2 stops
C$ 389Air Canada
Find Deal
Fri, 20 Feb - Tue, 24 Feb
Air Canada Logo
5:45 a.m. - 7:18 p.m.YOW-SEA
16h 33m2 stops
Air Canada Logo
10:10 a.m. - 1:34 a.m.SEA-YOW
12h 24m2 stops
C$ 392Air Canada
Find Deal
Tue, 14 Apr - Wed, 15 Apr
Air Canada Logo
5:50 p.m. - 10:08 p.m.YOW-SEA
7h 18m1 stop
Air Canada Logo
5:50 a.m. - 3:45 p.m.SEA-YOW
6h 55m1 stop
C$ 427Air Canada
Find Deal
Tue, 14 Apr - Wed, 15 Apr
United Airlines Logo
6:20 a.m. - 6:32 p.m.YOW-SEA
15h 12m2 stops
United Airlines Logo
5:02 a.m. - 9:56 p.m.SEA-YOW
13h 54m2 stops
C$ 745United Airlines
Find Deal
Mon, 15 Dec - Wed, 31 Dec
United Airlines Logo
7:27 p.m. - 1:58 p.m.YOW-SEA
21h 31m2 stops
United Airlines Logo
11:59 p.m. - 5:18 p.m.SEA-YOW
14h 19m1 stop
C$ 770United Airlines
Find Deal
Tue, 30 Dec - Sun, 4 Jan
American Airlines Logo
6:45 a.m. - 7:44 p.m.YOW-SEA
15h 59m2 stops
American Airlines Logo
12:59 a.m. - 4:49 p.m.SEA-YOW
12h 50m2 stops
C$ 790American Airlines
Find Deal
Fri, 21 Nov - Thu, 27 Nov
American Airlines Logo
6:45 a.m. - 8:37 p.m.YOW-SEA
16h 52m2 stops
American Airlines Logo
12:14 a.m. - 4:51 p.m.SEA-YOW
13h 37m2 stops
C$ 810American Airlines
Find Deal
Mon, 15 Dec - Tue, 30 Dec

WestJet flights from Ottawa to State of Washington

Our best WestJet deals on Ottawa to State of Washington flight tickets
WestJet
20 Feb
YOW5:40 a.m.Ottawa
11h 39m
2 stops
SEA2:19 p.m.Seattle/Tacoma Intl
24 Feb
SEA3:10 p.m.Seattle/Tacoma Intl
22h 43m
1 stop
YOW4:53 p.m.Ottawa
C$ 318
Find similar
WestJet
20 Feb
YOW6:00 a.m.Ottawa
11h 19m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
24 Feb
SEA3:10 p.m.Seattle/Tacoma Intl
22h 43m
1 stop
YOW4:53 p.m.Ottawa
C$ 349
Find similar
WestJet
21 Nov
YOW7:15 p.m.Ottawa
22h 25m
2 stops
SEA2:40 p.m.Seattle/Tacoma Intl
28 Nov
SEA3:10 p.m.Seattle/Tacoma Intl
30h 32m
2 stops
YOW12:42 a.m.Ottawa
C$ 657
Find similar

Air Canada flights from Ottawa to State of Washington

Our best Air Canada deals on Ottawa to State of Washington flight tickets
Air Canada
14 Apr
YOW5:50 p.m.Ottawa
7h 18m
1 stop
SEA10:08 p.m.Seattle/Tacoma Intl
15 Apr
SEA8:00 p.m.Seattle/Tacoma Intl
7h 43m
1 stop
YOW6:43 a.m.Ottawa
C$ 340
Find similar
Air Canada
20 Feb
YOW5:45 a.m.Ottawa
11h 46m
2 stops
SEA2:31 p.m.Seattle/Tacoma Intl
24 Feb
SEA8:00 p.m.Seattle/Tacoma Intl
10h 23m
2 stops
YOW9:23 a.m.Ottawa
C$ 389
Find similar
Air Canada
14 Apr
YOW5:45 a.m.Ottawa
16h 33m
2 stops
SEA7:18 p.m.Seattle/Tacoma Intl
15 Apr
SEA10:10 a.m.Seattle/Tacoma Intl
12h 24m
2 stops
YOW1:34 a.m.Ottawa
C$ 392
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 96,600 searches. Data last updated 2 November 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

Fri 20/2

5:40 a.m.-2:19 p.m.

2 stops11h 39m

Seattle/Tacoma Intl

Tue 24/2

3:10 p.m.-4:53 p.m.

1 stop22h 43m

C$ 318

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

5:50 p.m.-10:08 p.m.

1 stop7h 18m

Seattle/Tacoma Intl

Wed 15/4

8:00 p.m.-6:43 a.m.

1 stop7h 43m

C$ 340

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 20/2

6:00 a.m.-2:19 p.m.

1 stop11h 19m

Seattle/Tacoma Intl

Tue 24/2

3:10 p.m.-4:53 p.m.

1 stop22h 43m

C$ 349

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 20/2

5:45 a.m.-2:31 p.m.

2 stops11h 46m

Seattle/Tacoma Intl

Tue 24/2

8:00 p.m.-9:23 a.m.

2 stops10h 23m

C$ 389

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

5:45 a.m.-7:18 p.m.

2 stops16h 33m

Seattle/Tacoma Intl

Wed 15/4

10:10 a.m.-1:34 a.m.

2 stops12h 24m

C$ 392

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

5:50 p.m.-10:08 p.m.

1 stop7h 18m

Seattle/Tacoma Intl

Wed 15/4

5:50 a.m.-3:45 p.m.

1 stop6h 55m

C$ 427

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 15/12

6:20 a.m.-6:32 p.m.

2 stops15h 12m

Seattle/Tacoma Intl

Wed 31/12

5:02 a.m.-9:56 p.m.

2 stops13h 54m

C$ 745

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 30/12

7:27 p.m.-1:58 p.m.

2 stops21h 31m

Seattle/Tacoma Intl

Sun 4/1

11:59 p.m.-5:18 p.m.

1 stop14h 19m

C$ 770

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 21/11

6:45 a.m.-7:44 p.m.

2 stops15h 59m

Seattle/Tacoma Intl

Thu 27/11

12:59 a.m.-4:49 p.m.

2 stops12h 50m

C$ 790

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 15/12

6:45 a.m.-8:37 p.m.

2 stops16h 52m

Seattle/Tacoma Intl

Tue 30/12

12:14 a.m.-4:51 p.m.

2 stops13h 37m

C$ 810

Flights are sorted by cheapest round-trip flights 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?

In general, September 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$ 476. If you’re not able to fly to State of Washington in September, then October is your next best option. Flight prices from Ottawa to State of Washington during October average around C$ 538.

What is the cheapest day to depart on your flight to State of Washington?

On average, the least expensive day to fly to State of Washington from Ottawa is on a Thursday. momondo users have found tickets for Thursday departures for as low as C$ 599. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to State of Washington on Tuesday is C$ 680.

What is the cheapest time of day to depart on your flight to State of Washington?

According to our data, the cheapest time of day to fly to State of Washington is in the evening. momondo users have found flights departing from Ottawa to State of Washington in the evening for as low as C$ 601. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 701 on average. Flights to State of Washington from Ottawa at noon are generally more expensive because this time of day is more convenient for travellers’ 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 C$ 591 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$ 433 on momondo.

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

You could potentially save up to 29% 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

Direct flights

None
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 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
WestJetPriceFrom C$ 369Free CancellationRating
7.2
3,153 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 412Free CancellationRating
7.1
10,392 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 426Free CancellationRating
7.4
8,997 reviews
Search United Airlines 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.

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