Find flights
When to book
Airlines
FAQs

Cheap flights from Ottawa to Washington from C$ 242

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 25/7. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
2 Jun — 9 Jun1
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 3 May 2026.

Sat 25/71:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Wed 29/77:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 29/4C$ 402
Fri 25/91:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Wed 30/97:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 1/5C$ 412
Fri 25/91:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Sun 27/97:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 30/4C$ 413
Fri 25/96:55 a.m.
YOW
-
SEA
2 stops14h 50m
WestJet
Mon 28/97:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 3/5C$ 438
Wed 10/61:20 p.m.
YOW
-
SEA
1 stop8h 25m
WestJet
Fri 12/67:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 30/4C$ 442
Sat 27/61:20 p.m.
YOW
-
SEA
1 stop23h 20m
WestJet
Wed 5/87:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 30/4C$ 443
Sat 29/87:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Tue 1/92:30 p.m.
PDX
-
YOW
1 stop7h 10m
WestJet
Deal found 29/4C$ 443
Mon 29/66:55 a.m.
YOW
-
SEA
2 stops14h 50m
WestJet
Thu 6/87:00 a.m.
SEA
-
YOW
1 stop7h 15m
WestJet
Deal found 2/5C$ 448
Sun 5/76:15 p.m.
YOW
-
SEA
2 stops18h 25m
WestJet
Mon 13/77:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 30/4C$ 450
Fri 29/57:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Fri 5/62:30 p.m.
PDX
-
YOW
2 stops19h 00m
WestJet
Deal found 30/4C$ 472
Fri 22/57:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Fri 29/52:30 p.m.
PDX
-
YOW
2 stops19h 00m
WestJet
Deal found 2/5C$ 480
Tue 19/57:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Mon 25/52:30 p.m.
PDX
-
YOW
1 stop12h 05m
WestJet
Deal found 29/4C$ 488

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 3 May 2026.

Round-trip from

C$ 402

One-way from

C$ 242

Popular in

December

Cheapest in

January

Average price

C$ 699
WestJet
  • WestJet
  • 25/7-29/7
  • 2 total stops
  • 15h 25m total
  • Ottawa to Washington
Search Deals
WestJet
  • WestJet
  • 25/7
  • 1 total stop
  • 8h 25m total
  • Ottawa to Washington
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 3 May 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

Sun 5/7

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

2 stops18h 25m

Seattle/Tacoma Intl

Mon 13/7

7:00 a.m.-7:20 p.m.

1 stop9h 20m

C$ 451

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 27/6

6:55 a.m.-9:40 a.m.

2 stops29h 45m

Seattle/Tacoma Intl

Wed 5/8

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

2 stops10h 50m

C$ 462

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 28/5

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

1 stop8h 25m

Seattle/Tacoma Intl

Thu 4/6

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

2 stops23h 00m

C$ 473

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 13/5

7:20 a.m.-6:45 p.m.

1 stop14h 25m

Seattle/Tacoma Intl

Sun 17/5

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

2 stops10h 50m

C$ 482

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 20/10

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

1 stop8h 25m

Seattle/Tacoma Intl

Wed 21/10

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

2 stops10h 50m

C$ 485

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 28/6

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

2 stops18h 25m

Seattle/Tacoma Intl

Thu 9/7

7:35 p.m.-12:30 p.m.

2 stops13h 55m

C$ 512

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Tue 19/5

6:15 p.m.-1:50 p.m.

2 stops22h 35m

Portland

Tue 26/5

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

2 stops19h 00m

C$ 514

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 23/6

4:15 p.m.-9:40 a.m.

1 stop20h 25m

Seattle/Tacoma Intl

Tue 30/6

7:35 p.m.-7:20 p.m.

1 stop20h 45m

C$ 519

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Sat 29/8

6:00 a.m.-11:09 p.m.

3 stops20h 09m

Portland

Tue 1/9

11:15 p.m.-1:59 p.m.

1 stop11h 44m

C$ 529

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Wed 24/6

5:20 p.m.-11:53 p.m.

1 stop9h 33m

Portland

Wed 8/7

6:50 p.m.-10:03 a.m.

2 stops12h 13m

C$ 550

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 34 resultsSorted by cheapest first
1
2
3
4

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

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 90 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.

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$ 86). Flying from Ottawa to State of Washington in March is currently the most expensive (average of C$ 434). 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?

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 3 May 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
9,683 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,683 reviews
United Airlines
7.4
Good
9,683 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
WestJet
7.2
Good
3,331 reviews
United Airlines
7.4
Good
9,683 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Air Canada
7.1
Good
10,993 reviews
United Airlines
7.4
Good
9,683 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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$ 443. Airlines will cover a distance of 3605 km.

  • 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$ 119. Users have also found prices from C$ 161 and C$ 237 on United Airlines and Air Canada, 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$ 86). Flying from Ottawa to State of Washington in March is currently the most expensive (average of C$ 434). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ottawa to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Toronto Island to Newark flights
Pearson Intl to Newark flights
Pearson Intl to John F Kennedy Intl flights
Pearson Intl to Las Vegas flights
Pearson Intl to LaGuardia flights
Pearson Intl to Los Angeles flights
Pierre Elliott Trudeau Intl to Miami flights
Pearson Intl to Miami flights
Pearson Intl to Fort Lauderdale flights
Pearson Intl to Orlando flights
Pearson Intl to Seattle flights
Pearson Intl to Dallas/Fort Worth flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Pearson Intl to San Francisco flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Newark flights
Pearson Intl to Reagan-National flights
Pearson Intl to O'Hare Intl flights
Toronto Island to LaGuardia flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pearson Intl to Atlanta flights
Pearson Intl to Boston flights
Pearson Intl to Nashville flights
Pearson Intl to Dulles Intl flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Pearson Intl to Hobby flights
Pierre Elliott Trudeau Intl to Orlando flights
Toronto Island to Boston flights
Pearson Intl to Midway flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pierre Elliott Trudeau Intl to Tampa flights
Toronto Island to Fort Lauderdale flights
Toronto Island to Las Vegas flights
Pearson Intl to San Diego flights
Pierre Elliott Trudeau Intl to Nashville flights
Pearson Intl to Tampa flights
Pearson Intl to George Bush Intcntl flights
Toronto Island to Midway flights
Pearson Intl to Ontario flights
Toronto Island to Los Angeles flights
Pierre Elliott Trudeau Intl to San Francisco flights
Pearson Intl to Denver flights
Hamilton to Newark flights
Toronto Island to Orlando flights
Hamilton to John F Kennedy Intl flights
Pearson Intl to Baltimore flights
Toronto Island to Miami flights
Toronto Island to Dulles Intl flights
Ottawa to Newark flights

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 3 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 247AverageC$ 524FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 341AverageC$ 539FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 361AverageC$ 589FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.