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Cheap flights from Ottawa to Washington from C$ 249

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 27/8. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
6 Sep — 13 Sep1
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 7 August 2026.

Wed 23/91:20 p.m. -
1 stop8h 25m
Wed 30/97:35 p.m. -
1 stop7h 00m
Deal found 6/8C$ 464
Thu 3/912:25 p.m. -
2 stops11h 35m
Thu 10/97:35 p.m. -
1 stop7h 00m
Deal found 3/8C$ 465
Mon 21/96:55 a.m. -
2 stops14h 50m
Mon 28/97:35 p.m. -
1 stop7h 00m
Deal found 7/8C$ 468
Thu 10/91:20 p.m. -
1 stop8h 25m
Sat 12/97:35 p.m. -
1 stop7h 00m
Deal found 6/8C$ 469
Thu 3/91:20 p.m. -
1 stop8h 25m
Sat 12/97:35 p.m. -
1 stop7h 00m
Deal found 7/8C$ 474
Wed 30/91:20 p.m. -
1 stop8h 25m
Sun 4/107:35 p.m. -
1 stop7h 00m
Deal found 2/8C$ 476
Sat 19/91:20 p.m. -
1 stop8h 25m
Wed 30/97:35 p.m. -
1 stop7h 00m
Deal found 7/8C$ 482
Thu 27/812:25 p.m. -
2 stops11h 35m
Fri 28/87:00 a.m. -
1 stop7h 15m
Deal found 2/8C$ 489
Sat 29/87:20 a.m. -
1 stop9h 30m
Tue 1/92:30 p.m. -
1 stop7h 10m
Deal found 6/8C$ 565
Wed 16/96:00 a.m. -
3 stops19h 52m
Fri 25/96:55 p.m. -
2 stops18h 43m
Deal found 3/8C$ 583
Mon 24/83:10 p.m. -
1 stop9h 53m
Fri 28/811:02 p.m. -
1 stop11h 57m
Deal found 3/8C$ 590
Thu 1/109:00 a.m. -
2 stops13h 06m
Mon 5/107:45 p.m. -
2 stops10h 39m
Deal found 2/8C$ 591

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 7 August 2026.

Round-trip from

C$ 464

One-way from

C$ 249

Popular in

May

Cheapest in

January

Average price

C$ 611
WestJet
  • WestJet
  • 23/9-30/9
  • 2 total stops
  • 15h 25m total
  • Ottawa to Washington
Search Deals
WestJet
  • WestJet
  • 27/8
  • 2 total stops
  • 9h 20m total
  • Ottawa to Washington
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 7 August 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 Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 30/9

6:55 a.m.-6:45 p.m.

2 stops14h 50m

Seattle/Tacoma Intl

Sun 4/10

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

1 stop7h 00m

C$ 485

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 10/9

6:55 a.m.-6:45 p.m.

2 stops14h 50m

Seattle/Tacoma Intl

Sat 12/9

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

1 stop7h 00m

C$ 488

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 19/9

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

1 stop8h 25m

Seattle/Tacoma Intl

Wed 30/9

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

2 stops10h 50m

C$ 500

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Tue 18/8

6:00 a.m.-6:29 p.m.

2 stops15h 29m

Seattle/Tacoma Intl

Wed 2/9

8:40 a.m.-11:54 p.m.

2 stops12h 14m

C$ 583
Quickest round-trip

OttawaPortland

YOW Ottawa - PDX Portland

YOWPDX

Ottawa

Wed 26/8

5:20 p.m.-10:52 p.m.

1 stop8h 32m

Portland

Sun 6/9

7:45 p.m.-5:54 a.m.

1 stop7h 09m

C$ 583

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 29/10

6:00 a.m.-5:54 p.m.

2 stops14h 54m

Seattle/Tacoma Intl

Sun 1/11

6:45 a.m.-9:56 p.m.

1 stop12h 11m

C$ 583

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 24/10

6:25 a.m.-9:15 p.m.

3 stops17h 50m

Seattle/Tacoma Intl

Sat 7/11

10:56 p.m.-2:09 p.m.

1 stop12h 13m

C$ 583

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 28/10

4:36 p.m.-11:07 p.m.

1 stop9h 31m

Seattle/Tacoma Intl

Sat 7/11

10:56 p.m.-2:09 p.m.

1 stop12h 13m

C$ 583

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 3/9

6:55 a.m.-6:45 p.m.

2 stops14h 50m

Seattle/Tacoma Intl

Sat 12/9

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

2 stops23h 00m

C$ 583

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 28/10

6:00 a.m.-7:09 p.m.

2 stops16h 09m

Seattle/Tacoma Intl

Mon 2/11

11:15 p.m.-1:11 p.m.

1 stop10h 56m

C$ 583

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/8

Showing 1-10 of 36 resultsSorted by cheapest first
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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$ 399). Flying from Ottawa to State of Washington in May is currently the most expensive (average of C$ 802). 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.

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

Airfare is below average for this route at the moment.
Ottawa to State of Washington flights typically cost between C$ 535 and C$ 802 in September.
The cheapest round-trip price found within the last 5 days was C$ 464 on WestJet (23 Sep-30 Sep).

How far ahead should I book a flight from Ottawa to State of Washington?

The best time to book flights from Ottawa to State of Washington is 28 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 7 August 2026.
Check out reviews from past customers who have flown with Delta,United Airlines, andWestJet 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.
Delta
7.8
Good
8,505 reviews
Check prices

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Delta
7.8
Good
8,505 reviews
Delta
7.8
Good
8,505 reviews
Check prices

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
United Airlines
7.4
Good
10,085 reviews
Delta
7.8
Good
8,505 reviews
Check prices

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
WestJet
7.2
Good
3,426 reviews
Delta
7.8
Good
8,505 reviews
Check prices

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Air Canada
7.1
Good
11,449 reviews
Delta
7.8
Good
8,505 reviews
Check prices

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,

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 8h 18m. WestJet provides one of the quickest options available for as low as C$ 583. 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 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$ 123. Users have also found prices from C$ 153 and C$ 166 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$ 399). Flying from Ottawa to State of Washington in May is currently the most expensive (average of C$ 802). 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

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Ottawa to Washington

Discover the top 4 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 7 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 253AverageC$ 635FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 255AverageC$ 573FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 341AverageC$ 591FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 398AverageC$ 1,125FlexibilityNo cancel feeOn-timeN/A
Search Delta 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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