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Cheap flights from Ottawa to Washington from C$ 179

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 29/9. 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

WestJet Logo
7:15 p.m. - 12:35 p.m.YOW-SEA
20h 20m2 stops
WestJet Logo
1:50 p.m. - 12:40 a.m.SEA-YOW
7h 50m1 stop
C$ 350WestJet
Find Deal
Sat, 11 Oct - Wed, 22 Oct
United Airlines Logo
2:45 p.m. - 8:44 p.m.YOW-SEA
8h 59m1 stop
United Airlines Logo
7:00 a.m. - 5:06 p.m.SEA-YOW
7h 06m1 stop
C$ 352United Airlines
Find Deal
Sat, 11 Oct - Wed, 22 Oct
WestJet Logo
7:15 p.m. - 12:35 p.m.YOW-SEA
20h 20m2 stops
WestJet Logo
8:40 a.m. - 12:22 a.m.SEA-YOW
12h 42m2 stops
C$ 357WestJet
Find Deal
Sat, 11 Oct - Wed, 22 Oct
United Airlines Logo
7:29 p.m. - 9:59 a.m.YOW-SEA
17h 30m2 stops
United Airlines Logo
10:54 p.m. - 11:45 a.m.SEA-YOW
9h 51m1 stop
C$ 360United Airlines
Find Deal
Tue, 30 Sep - Sat, 4 Oct
United Airlines Logo
5:25 p.m. - 10:30 p.m.YOW-SEA
8h 05m1 stop
United Airlines Logo
3:48 p.m. - 10:26 a.m.SEA-YOW
15h 38m2 stops
C$ 372United Airlines
Find Deal
Fri, 17 Oct - Wed, 29 Oct
United Airlines Logo
5:15 a.m. - 6:49 p.m.YOW-SEA
16h 34m2 stops
United Airlines Logo
11:59 p.m. - 1:32 p.m.SEA-YOW
11h 33m2 stops
C$ 381United Airlines
Find Deal
Fri, 17 Oct - Sat, 1 Nov
United Airlines Logo
11:10 a.m. - 10:45 p.m.YOW-SEA
14h 35m1 stop
United Airlines Logo
7:00 a.m. - 5:12 p.m.SEA-YOW
7h 12m1 stop
C$ 383United Airlines
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Air Canada Logo
8:20 p.m. - 9:20 a.m.YOW-PDX
16h 00m2 stops
Air Canada Logo
7:40 p.m. - 8:23 a.m.PDX-YOW
9h 43m1 stop
C$ 421Air Canada
Find Deal
Thu, 16 Oct - Sun, 19 Oct
Air Canada Logo
5:45 a.m. - 2:45 p.m.YOW-PDX
12h 00m2 stops
Air Canada Logo
7:00 p.m. - 6:43 a.m.PDX-YOW
8h 43m1 stop
C$ 515Air Canada
Find Deal
Tue, 3 Mar - Wed, 4 Mar
Delta Logo
7:50 a.m. - 12:59 p.m.YOW-SEA
8h 09m1 stop
Delta Logo
1:50 p.m. - 12:40 a.m.SEA-YOW
7h 50m1 stop
C$ 743Delta
Find Deal
Sun, 12 Oct - Thu, 23 Oct

WestJet flights from Ottawa to State of Washington

Our best WestJet deals on Ottawa to State of Washington flight tickets
WestJet
11 Oct
YOW7:15 p.m.Ottawa
20h 20m
2 stops
SEA12:35 p.m.Seattle/Tacoma Intl
22 Oct
SEA1:50 p.m.Seattle/Tacoma Intl
7h 50m
1 stop
YOW12:40 a.m.Ottawa
C$ 350
Find similar
WestJet
11 Oct
YOW7:15 p.m.Ottawa
20h 20m
2 stops
SEA12:35 p.m.Seattle/Tacoma Intl
22 Oct
SEA8:40 a.m.Seattle/Tacoma Intl
12h 42m
2 stops
YOW12:22 a.m.Ottawa
C$ 357
Find similar
WestJet
30 Oct
YOW5:40 a.m.Ottawa
11h 40m
2 stops
SEA2:20 p.m.Seattle/Tacoma Intl
4 Jan
SEA3:10 p.m.Seattle/Tacoma Intl
22h 43m
1 stop
YOW4:53 p.m.Ottawa
C$ 430
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
11 Oct
YOW2:45 p.m.Ottawa
8h 59m
1 stop
SEA8:44 p.m.Seattle/Tacoma Intl
22 Oct
SEA7:00 a.m.Seattle/Tacoma Intl
7h 06m
1 stop
YOW5:06 p.m.Ottawa
C$ 352
Find similar
United Airlines
30 Sep
YOW7:29 p.m.Ottawa
17h 30m
2 stops
SEA9:59 a.m.Seattle/Tacoma Intl
4 Oct
SEA10:54 p.m.Seattle/Tacoma Intl
9h 51m
1 stop
YOW11:45 a.m.Ottawa
C$ 360
Find similar
United Airlines
17 Oct
YOW5:25 p.m.Ottawa
8h 05m
1 stop
SEA10:30 p.m.Seattle/Tacoma Intl
29 Oct
SEA3:48 p.m.Seattle/Tacoma Intl
15h 38m
2 stops
YOW10:26 a.m.Ottawa
C$ 372
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 15 September 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

Sat 11/10

7:15 p.m.-12:35 p.m.

2 stops20h 20m

Seattle/Tacoma Intl

Wed 22/10

1:50 p.m.-12:40 a.m.

1 stop7h 50m

C$ 350

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 11/10

2:45 p.m.-8:44 p.m.

1 stop8h 59m

Seattle/Tacoma Intl

Wed 22/10

7:00 a.m.-5:06 p.m.

1 stop7h 06m

C$ 352

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 11/10

7:15 p.m.-12:35 p.m.

2 stops20h 20m

Seattle/Tacoma Intl

Wed 22/10

8:40 a.m.-12:22 a.m.

2 stops12h 42m

C$ 357

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 30/9

7:29 p.m.-9:59 a.m.

2 stops17h 30m

Seattle/Tacoma Intl

Sat 4/10

10:54 p.m.-11:45 a.m.

1 stop9h 51m

C$ 360

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 17/10

5:25 p.m.-10:30 p.m.

1 stop8h 05m

Seattle/Tacoma Intl

Wed 29/10

3:48 p.m.-10:26 a.m.

2 stops15h 38m

C$ 372

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 17/10

5:15 a.m.-6:49 p.m.

2 stops16h 34m

Seattle/Tacoma Intl

Sat 1/11

11:59 p.m.-1:32 p.m.

2 stops11h 33m

C$ 381

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 29/10

11:10 a.m.-10:45 p.m.

1 stop14h 35m

Seattle/Tacoma Intl

Wed 5/11

7:00 a.m.-5:12 p.m.

1 stop7h 12m

C$ 383

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Thu 16/10

8:20 p.m.-9:20 a.m.

2 stops16h 00m

Portland

Sun 19/10

7:40 p.m.-8:23 a.m.

1 stop9h 43m

C$ 421

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Tue 3/3

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

2 stops12h 00m

Portland

Wed 4/3

7:00 p.m.-6:43 a.m.

1 stop8h 43m

C$ 515

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 12/10

7:50 a.m.-12:59 p.m.

1 stop8h 09m

Seattle/Tacoma Intl

Thu 23/10

1:50 p.m.-12:40 a.m.

1 stop7h 50m

C$ 743

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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$ 502. If you’re not able to fly to State of Washington in September, then August is your next best option. Flight prices from Ottawa to State of Washington during August average around C$ 566.

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$ 591. 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$ 672.

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$ 594. 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$ 692 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$ 592 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$ 428 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

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.
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  • 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$ 365Free CancellationRating
7.2
3,091 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 407Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 420Free CancellationRating
7.4
8,929 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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