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Cheap flights from Ottawa to Washington from C$ 236

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
15 Apr — 22 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ottawa to Washington

Enter your travel dates to find the best prices.

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 16 March 2026.

Fri 29/51:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Mon 1/67:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 11/3C$ 399
Thu 23/45:40 a.m.
YOW
-
SEA
2 stops11h 39m
WestJet
Sun 26/47:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 15/3C$ 410
Fri 1/51:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Sun 3/510:30 a.m.
SEA
-
YOW
2 stops10h 50m
WestJet
Deal found 15/3C$ 425
Fri 24/45:45 p.m.
YOW
-
SEA
1 stop23h 46m
WestJet
Sun 26/47:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 15/3C$ 443
Mon 20/45:40 a.m.
YOW
-
SEA
2 stops11h 39m
WestJet
Tue 21/43:10 p.m.
SEA
-
YOW
2 stops30h 29m
WestJet
Deal found 12/3C$ 444
Thu 30/44:15 p.m.
YOW
-
SEA
1 stop20h 25m
WestJet
Thu 7/57:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 15/3C$ 461
Fri 8/57:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Mon 11/52:30 p.m.
PDX
-
YOW
2 stops19h 00m
WestJet
Deal found 14/3C$ 535
Wed 3/67:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Fri 5/62:30 p.m.
PDX
-
YOW
2 stops19h 00m
WestJet
Deal found 12/3C$ 591
Wed 3/67:20 a.m.
YOW
-
PDX
1 stop9h 30m
Delta
Fri 5/611:02 p.m.
PDX
-
YOW
2 stops15h 33m
Delta
Deal found 11/3C$ 628
Wed 3/63:10 p.m.
YOW
-
PDX
1 stop9h 38m
United Airlines
Fri 5/611:30 p.m.
PDX
-
YOW
1 stop16h 18m
United Airlines
Deal found 11/3C$ 641

Find flight deals from Ottawa to Washington

Keep the following information in mind while searching for Ottawa to Washington flight deals. Data was last updated 16 March 2026.

Round-trip from

C$ 399

One-way from

C$ 236

Popular in

December

Cheapest in

January

Average price

C$ 661
WestJet
  • WestJet
  • 29/5-1/6
  • 2 total stops
  • 15h 25m total
  • Ottawa to Washington
Search Deals
WestJet
  • WestJet
  • 27/4
  • 1 total stop
  • 8h 25m total
  • Ottawa to Washington
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 16 March 2026.
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

Cheapest round-trip

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 30/4

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

2 stops27h 30m

Seattle/Tacoma Intl

Thu 7/5

7:35 p.m.-5:35 a.m.

1 stop7h 00m

C$ 465

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 15/5

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

2 stops27h 30m

Seattle/Tacoma Intl

Sat 23/5

10:30 a.m.-12:20 a.m.

2 stops10h 50m

C$ 483

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 30/4

6:15 p.m.-9:40 a.m.

2 stops18h 25m

Seattle/Tacoma Intl

Mon 4/5

7:35 p.m.-5:35 a.m.

1 stop7h 00m

C$ 508

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 9/4

7:45 a.m.-3:05 p.m.

1 stop10h 20m

Seattle/Tacoma Intl

Sun 12/4

5:40 a.m.-3:53 p.m.

1 stop7h 13m

C$ 510

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 9/4

10:44 a.m.-12:34 a.m.

1 stop16h 50m

Seattle/Tacoma Intl

Sun 12/4

10:35 p.m.-1:59 p.m.

1 stop12h 24m

C$ 527

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 20/4

10:44 a.m.-12:34 a.m.

1 stop16h 50m

Seattle/Tacoma Intl

Tue 21/4

12:22 p.m.-10:03 a.m.

2 stops18h 41m

C$ 528

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 8/4

6:25 a.m.-7:00 p.m.

1 stop15h 35m

Seattle/Tacoma Intl

Tue 14/4

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

1 stop11h 00m

C$ 528
Quickest round-trip

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 9/7

1:20 p.m.-6:45 p.m.

1 stop8h 25m

Seattle/Tacoma Intl

Fri 17/7

7:00 a.m.-5:15 p.m.

1 stop7h 15m

C$ 530

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Wed 3/6

7:20 a.m.-1:50 p.m.

1 stop9h 30m

Portland

Fri 5/6

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

2 stops19h 00m

C$ 591

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Sat 6/6

7:20 a.m.-1:50 p.m.

1 stop9h 30m

Portland

Sat 13/6

10:55 p.m.-5:35 p.m.

2 stops15h 40m

C$ 634

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 30 resultsSorted by cheapest first
1
2
3

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$ 180). Flying from Ottawa to State of Washington in December is currently the most expensive (average of C$ 466). 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.

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 16 March 2026.
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
9,429 reviews
Check prices

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,429 reviews
United Airlines
7.4
Good
9,429 reviews
Check prices

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
WestJet
7.2
Good
3,295 reviews
United Airlines
7.4
Good
9,429 reviews
Check prices

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
10,805 reviews
United Airlines
7.4
Good
9,429 reviews
Check prices

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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 9h 30m. WestJet provides one of the quickest options available for as low as C$ 634. Airlines will cover a distance of 3605 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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$ 180). Flying from Ottawa to State of Washington in December is currently the most expensive (average of C$ 466). 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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Alternative routes for Ottawa to Washington

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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 16 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 250AverageC$ 492FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 342AverageC$ 487FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 365AverageC$ 588FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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