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Cheap flights from Ottawa to Washington from C$ 209

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/10. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Ottawa to Washington

Keep the following information in mind while searching for Ottawa to Washington flight deals. Data was last updated 11 September 2025.

Round-trip from

C$ 353

One-way from

C$ 209

Popular in

December

Cheapest in

October

Average price

C$ 563
WestJet
  • WestJet
  • 20/10-22/10
  • 2 total stops
  • 15h 59m total
  • Ottawa to Washington
Search Deals
WestJet
  • WestJet
  • 20/10
  • 1 total stop
  • 8h 09m total
  • Ottawa to Washington
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 82 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Ottawa to Washington

Cheapest flights from Ottawa to Washington
Explore the most affordable flight options available from Ottawa to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Mon 20/107:50 a.m.YOW - SEA
1 stop8h 09mWestJet
Wed 22/101:50 p.m.SEA - YOW
1 stop7h 50mWestJet
Deal found 11/9C$ 353
Fri 21/115:40 a.m.YOW - SEA
2 stops11h 40mWestJet
Sat 6/123:20 p.m.SEA - YOW
1 stop22h 33mWestJet
Deal found 9/9C$ 362
Mon 20/1012:20 p.m.YOW - SEA
2 stops11h 09mWestJet
Thu 23/108:40 a.m.SEA - YOW
2 stops12h 42mWestJet
Deal found 11/9C$ 364
Sat 11/106:00 p.m.YOW - SEA
1 stop7h 31mAir Canada
Wed 22/105:30 a.m.SEA - YOW
1 stop7h 42mAir Canada
Deal found 10/9C$ 396
Sat 25/106:00 a.m.YOW - SEA
1 stop9h 59mWestJet
Sat 1/113:20 p.m.SEA - YOW
1 stop23h 33mWestJet
Deal found 10/9C$ 398
Sat 11/107:15 p.m.YOW - SEA
2 stops20h 20mWestJet
Wed 22/108:40 a.m.SEA - YOW
2 stops12h 42mWestJet
Deal found 10/9C$ 410
Thu 23/106:00 p.m.YOW - PDX
1 stop8h 01mAir Canada
Sun 26/107:00 p.m.PDX - YOW
1 stop8h 23mAir Canada
Deal found 11/9C$ 582
Thu 23/109:00 a.m.YOW - PDX
1 stop8h 48mMultiple Airlines
Sun 26/109:08 a.m.PDX - YOW
2 stops26h 36mMultiple Airlines
Deal found 11/9C$ 642
Thu 23/105:15 a.m.YOW - PDX
2 stops20h 10mUnited Airlines
Sun 26/1011:59 p.m.PDX - YOW
2 stops18h 19mUnited Airlines
Deal found 11/9C$ 772

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to 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, Cheapflights users made 629,999 searches. Data last updated 11 September 2025.
Use the filters below to find and compare flights from Ottawa to Washington that are best for you.

Fly from

Ottawa

Fly to

Washington

Route

Depart

Return

Price

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 20/10

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

1 stop8h 09m

Seattle/Tacoma Intl

Wed 22/10

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

1 stop7h 50m

C$ 353

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 20/10

12:20 p.m.-8:29 p.m.

2 stops11h 09m

Seattle/Tacoma Intl

Thu 23/10

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

1 stop7h 50m

C$ 370

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 21/11

5:40 a.m.-2:20 p.m.

2 stops11h 40m

Seattle/Tacoma Intl

Sat 6/12

3:20 p.m.-12:42 a.m.

2 stops30h 22m

C$ 376

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 11/10

6:00 p.m.-10:31 p.m.

1 stop7h 31m

Seattle/Tacoma Intl

Wed 22/10

5:30 a.m.-4:12 p.m.

1 stop7h 42m

C$ 396

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 25/10

5:55 a.m.-12:59 p.m.

2 stops10h 04m

Seattle/Tacoma Intl

Sat 1/11

11:55 a.m.-12:40 a.m.

2 stops9h 45m

C$ 399

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$ 410

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 27/9

6:00 p.m.-10:16 p.m.

1 stop7h 16m

Seattle/Tacoma Intl

Mon 29/9

7:15 a.m.-5:19 p.m.

1 stop7h 04m

C$ 412

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 24/9

6:00 p.m.-10:16 p.m.

1 stop7h 16m

Seattle/Tacoma Intl

Wed 1/10

5:30 a.m.-7:29 p.m.

2 stops10h 59m

C$ 412

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 30/9

2:48 p.m.-10:17 p.m.

1 stop10h 29m

Seattle/Tacoma Intl

Sat 4/10

1:12 p.m.-9:58 a.m.

1 stop17h 46m

C$ 418

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$ 500

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 25 results
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Best time to book a flight from Ottawa to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Ottawa with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to Washington

What is the cheapest month to book a flight from Ottawa to State of Washington?

Currently, January is the cheapest month in which you can book a flight from Ottawa to State of Washington (average of C$ 262). Flying from Ottawa to State of Washington in December is currently the most expensive (average of C$ 353). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YOW to WA?

Find hourly flight availability from Ottawa to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to State of Washington as you normally would.

How much does it cost to fly round-trip from Ottawa to State of Washington?

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 11 September 2025.
Check out reviews from past customers who have flown with United Airlines,WestJet, andAir Canada from Ottawa to Washington to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
WestJet
7.2
Good
3,091 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ottawa to Washington?

    If you book a flight to Washington from Ottawa, you will be flying from Ottawa, which is the city’s only airport. Ottawa (YOW) is located 10.6 km from the centre of Ottawa.

  • How long is the flight from Ottawa to State of Washington?

    A quick flight from Ottawa to State of Washington can take about 7h 31m. WestJet provides one of the quickest options available for as low as C$ 396. Airlines will cover a distance of 3529 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Ottawa to State of Washington one-way?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 209. Users have also found prices from C$ 240 and C$ 256 on Air Canada and United Airlines, respectively.

  • What are the most popular routes from Ottawa to State of Washington?

    While some choose either Ottawa - Portland or Ottawa - Everett Paine Field, Ottawa - Seattle/Tacoma Intl is the most popular route from Ottawa to State of Washington.

  • Can I find deals for flights from Ottawa to Washington that include hotel bookings?

    Yes. In addition to deals on Ottawa to Washington flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Washington.

  • Can I find deals for business class flights from Ottawa to Washington?

    Yes. Cheapflights offers flight deals from Ottawa to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ottawa to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Ottawa to State of Washington (average of C$ 262). Flying from Ottawa to State of Washington in December is currently the most expensive (average of C$ 353). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 3 airlines flying from Ottawa to Washington

Discover the top 3 airlines that operate flights from Ottawa to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 367AverageC$ 552FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 408AverageC$ 606FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 421AverageC$ 590FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ottawa to Washington?

Deals for Ottawa to Washington flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Washington?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ottawa to Washington for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ottawa to Washington with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ottawa to Washington, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Ottawa to Washington become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington from Ottawa today and book when prices fit your budget.

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