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Cheap flights from Washington, D.C. to Ottawa from £181

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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YOW
28 Aug — 4 Sep1
1 adult
1 adult, Economy, 0 bags

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 29 July 2026.

Tue 29/912:55
DCA
-
YOW
Nonstop1h 32m
Air Canada
Fri 9/1010:25
YOW
-
DCA
Nonstop1h 35m
Air Canada
Deal found 28/7£277
Thu 27/812:40
DCA
-
YOW
Nonstop1h 31m
Air Canada
Mon 31/810:25
YOW
-
DCA
Nonstop1h 35m
Air Canada
Deal found 28/7£282
Thu 27/806:00
DCA
-
YOW
2 stops18h 20m
Multiple Airlines
Mon 31/806:00
YOW
-
DCA
1 stop4h 18m
Multiple Airlines
Deal found 28/7£285
Fri 28/806:00
DCA
-
YOW
1 stop4h 35m
Air Canada
Mon 31/806:00
YOW
-
DCA
1 stop4h 18m
Air Canada
Deal found 28/7£291
Fri 28/818:55
DCA
-
YOW
1 stop5h 25m
Multiple Airlines
Mon 31/822:05
YOW
-
DCA
2 stops17h 33m
Multiple Airlines
Deal found 28/7£315
Wed 25/1106:25
DCA
-
YOW
1 stop7h 44m
Multiple Airlines
Wed 25/1117:40
YOW
-
DCA
1 stop4h 19m
Multiple Airlines
Deal found 28/7£376
Thu 20/808:30
DCA
-
YOW
1 stop5h 29m
United Airlines
Sun 23/806:05
YOW
-
DCA
1 stop3h 41m
United Airlines
Deal found 29/7£393

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 29 July 2026.

Round-trip from

£277

One-way from

£181

Popular in

December

Cheapest in

October

Average price

£369
Air Canada
  • Air Canada
  • 29/9-9/10
  • Nonstop
  • 3h 07m total
  • Washington, D.C. to Ottawa
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United Airlines
  • United Airlines
  • 10/9
  • 1 total stop
  • 5h 08m total
  • Washington, D.C. to Ottawa
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£22 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
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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 29 July 2026.
Use the filters below to find and compare flights from Washington, D.C. to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Tue 29/9

09:40-13:58

1 stop4h 18m

Ottawa

Fri 9/10

11:15-15:40

1 stop4h 25m

£305

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Wed 25/11

06:25-14:09

1 stop7h 44m

Ottawa

Wed 25/11

17:40-21:59

1 stop4h 19m

£376

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Thu 13/8

08:30-13:59

1 stop5h 29m

Ottawa

Sun 16/8

06:25-13:04

1 stop6h 39m

£469
Fastest return journey

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Wed 2/9

12:40-14:11

Nonstop1h 31m

Ottawa

Sun 6/9

10:40-12:14

Nonstop1h 34m

£532

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Fri 25/9

12:55-14:27

Nonstop1h 32m

Ottawa

Mon 28/9

18:01-21:59

1 stop3h 58m

£563

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Wed 25/11

14:40-16:01

2 stops25h 21m

Ottawa

Sun 29/11

13:00-19:13

1 stop6h 13m

£576

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Mon 10/8

12:40-14:11

Nonstop1h 31m

Ottawa

Mon 10/8

17:20-08:55

1 stop15h 35m

£658

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Sun 6/9

10:00-00:20

2 stops14h 20m

Ottawa

Fri 11/9

06:55-11:26

2 stops28h 31m

£672

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Sat 8/8

17:55-22:05

1 stop4h 10m

Ottawa

Mon 10/8

10:25-12:00

Nonstop1h 35m

£679

Washington, D.C.Ottawa

DCA - YOW

DCAYOW

Washington, D.C. Reagan-National

Wed 19/8

10:00-00:20

2 stops14h 20m

Ottawa

Mon 24/8

06:55-23:48

2 stops16h 53m

£686

Flights are sorted by cheapest return flights first.

Deals found on 27/7

Showing 1-10 of 16 resultsSorted by cheapest first
1
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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

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

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of £323). Flying from Washington, D.C. to Ottawa in February is currently the most expensive (average of £487). 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 29 July 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 29 July 2026.

The most flights from WAS to YOW are scheduled on a Monday (11 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (9 on average).

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

Airfare is below average for this route at the moment.
Washington, D.C. to Ottawa flights typically cost between £292 and £411 in September.
The cheapest return price found within the last 5 days was £277 on Air Canada (29 Sept–9 Oct).

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

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 74 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 10 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 4h 18m. The time it takes to get you to your destination can typically vary by up to 1h 11m. 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 (86%), United Airlines (80%) or Air Canada (80%) 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, October is the cheapest month in which you can book a flight from Washington, D.C. to Ottawa (average of £323). Flying from Washington, D.C. to Ottawa in February is currently the most expensive (average of £487). 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
Gatineau
Brockville
Smiths Falls

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Alternative routes for Washington, D.C. to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

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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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