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Cheap flights from Washington, D.C. to Ottawa from £135

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 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YOW
5 Mar — 12 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Washington, D.C. to Ottawa are usually found in January or April, booked 21 days in advance, depart on a Tuesday or Monday and return on a Monday

Cheap flight deals from Washington, D.C. to Ottawa

Enter your travel dates to find the best prices.

Cheapest flights from Washington, D.C. to Ottawa
Explore the most affordable flight options available from Washington, D.C. to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 February 2026.

Thu 19/306:00
DCA
-
YOW
1 stop3h 41m
Air Canada
Thu 26/310:30
YOW
-
DCA
Nonstop1h 49m
Air Canada
Deal found 2/2£273
Mon 23/306:00
DCA
-
YOW
1 stop3h 41m
Air Canada
Wed 25/310:50
YOW
-
DCA
1 stop4h 41m
Air Canada
Deal found 31/1£278
Thu 19/306:00
DCA
-
YOW
1 stop3h 41m
Multiple Airlines
Thu 26/306:45
YOW
-
DCA
2 stops9h 33m
Multiple Airlines
Deal found 2/2£385
Thu 18/611:00
DCA
-
YOW
1 stop5h 15m
United Airlines
Sun 21/614:48
YOW
-
DCA
1 stop5h 00m
United Airlines
Deal found 31/1£392
Thu 23/712:55
DCA
-
YOW
Nonstop1h 31m
United Airlines
Wed 29/710:25
YOW
-
DCA
Nonstop1h 35m
United Airlines
Deal found 2/2£413
Mon 23/312:29
DCA
-
YOW
2 stops28h 19m
American Airlines
Wed 25/306:45
YOW
-
DCA
2 stops26h 34m
American Airlines
Deal found 31/1£423
Thu 19/306:09
DCA
-
YOW
2 stops12h 14m
American Airlines
Thu 26/306:45
YOW
-
DCA
2 stops17h 14m
American Airlines
Deal found 2/2£461
Tue 24/211:00
DCA
-
YOW
2 stops13h 39m
Delta
Sun 1/305:40
YOW
-
DCA
2 stops25h 39m
Delta
Deal found 2/2£472
Thu 19/209:05
DCA
-
YOW
1 stop4h 29m
United Airlines
Tue 24/211:10
YOW
-
DCA
1 stop5h 48m
United Airlines
Deal found 2/2£486

Find flight deals from Washington, D.C. to Ottawa

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Ottawa (YOW). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 3 February 2026.

Round-trip from

£273

One-way from

£135

Popular in

December

Cheapest in

January

Average price

£274
Air Canada
  • Air Canada
  • 19/3-26/3
  • 1 total stop
  • 5h 30m total
  • Washington, D.C. to Ottawa
Search Deals
Air Canada
  • Air Canada
  • 4/3
  • 1 total stop
  • 5h 18m total
  • Washington, D.C. to Ottawa
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£4 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington, D.C. to Ottawa 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 858,174 searches. Data last updated 3 February 2026.
Use the filters below to find and compare flights from Washington, D.C. to Ottawa that are best for you.

Fly from

Washington, D.C.

Fly to

Ottawa

Route

Depart

Return

Price

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Thu 19/3

06:00-09:41

1 stop3h 41m

Ottawa

Thu 26/3

10:50-15:31

1 stop4h 41m

£276

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Mon 23/3

06:00-09:41

1 stop3h 41m

Ottawa

Wed 25/3

10:50-15:31

1 stop4h 41m

£278

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Mon 23/3

06:00-09:41

1 stop3h 41m

Ottawa

Wed 25/3

11:00-18:38

2 stops7h 38m

£385

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Thu 18/6

11:00-16:15

1 stop5h 15m

Ottawa

Sun 21/6

14:48-19:48

1 stop5h 00m

£392

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Mon 23/3

12:29-16:48

2 stops28h 19m

Ottawa

Wed 25/3

06:45-09:19

2 stops26h 34m

£423

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Tue 24/2

08:55-00:39

2 stops15h 44m

Ottawa

Thu 26/2

05:40-18:48

2 stops13h 08m

£472

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Tue 24/2

11:00-00:39

2 stops13h 39m

Ottawa

Mon 2/3

05:40-23:07

2 stops17h 27m

£472

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Thu 19/2

09:05-13:34

1 stop4h 29m

Ottawa

Tue 24/2

11:10-16:58

1 stop5h 48m

£486

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Mon 23/2

08:55-00:39

2 stops15h 44m

Ottawa

Sun 1/3

05:40-07:19

2 stops25h 39m

£491

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Mon 23/2

08:55-00:39

2 stops15h 44m

Ottawa

Thu 26/2

05:40-23:07

2 stops17h 27m

£491

Flights are sorted by cheapest return flights first.

Deals found on 2/2

Showing 1-10 of 17 results
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Best time to book a flight from Washington, D.C. to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from Washington, D.C. with our price prediction graph.
Estimated return 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 Washington, D.C. to Ottawa

How far ahead should I book a flight from Washington, D.C. to Ottawa?

Use this chart to determine the optimal time to book a return flight from Washington, D.C. to Ottawa. Price data was last updated on 30 January 2026.

The price you pay for your flight from Washington, D.C. to Ottawa may vary depending on when you book. For the best chance of a lower fare, look to book 21 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Washington, D.C. to Ottawa?

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of £82). Flying from Washington, D.C. to Ottawa in December is currently the most expensive (average of £162). 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 WAS to YOW?

Find hourly flight availability from Washington, D.C. to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 February 2026.

When flying from Washington, D.C. to Ottawa, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Washington, D.C. to Ottawa

Explore weekly flight availability from Washington, D.C. to Ottawa. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 3 February 2026.

The most flights from WAS to YOW are scheduled on a Monday (9 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

How much does it cost for a return flight from Washington, D.C. to Ottawa?

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Ottawa. 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 into for flights to Ottawa from Washington, D.C.?

    Located just 6.6 mi from the city center, Ottawa is the airport most travelers will use when flying to Ottawa from Washington, D.C.. Booking flights from Washington, D.C. to Ottawa (YOW) should be relatively easy as there are 8 daily inbound flights from Washington, D.C. from 0 different airlines.

  • How long is the flight from Washington, D.C. to Ottawa?

    Airlines like Air Canada and United Airlines fly from Washington, D.C. to Ottawa in about 3h 41m. The time it takes to get you to your destination can typically vary by up to 1h 34m. Airlines will cover a distance of 452 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most reliable airlines from Washington, D.C. to Ottawa?

    Consider Republic Airways (84%), United Airlines (62%) or Air Canada (58%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. to Ottawa.

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

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

  • How can I find direct flights from Washington, D.C. to Ottawa?

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

  • Can I find deals for business class flights from Washington, D.C. to Ottawa?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Ottawa 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 Washington, D.C. to Ottawa?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of £82). Flying from Washington, D.C. to Ottawa in December is currently the most expensive (average of £162). 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

Travelling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Brockville
Smiths Falls

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Alternative routes for Washington, D.C. to Ottawa

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How does Cheapflights help users find flights from Washington, D.C. to Ottawa?

Cheapflights makes it easy to find Washington, D.C. to Ottawa flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Ottawa?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ottawa from Washington, D.C..

Can Cheapflights find flights from Washington, D.C. to Ottawa with no change fees?

Yes, we can. To see specific flights from Washington, D.C. to Ottawa with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Washington, D.C. to Ottawa become cheaper?

Yes! Start tracking prices for Washington, D.C. to Ottawa flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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