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Cheap Flights from Ottawa (YOW) to Washington D.C. (WASA)

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      Travellers and cabin class, 1 Adult, Economy
      United
      Air Canada
      Avianca

      Compare Ottawa International to Washington D.C. flight deals

      Find the cheapest month or even day of the year to fly to Washington D.C.

      Book the best Washington D.C. fare with no extra fees

      Flight deals from Ottawa International to Washington D.C.

      Looking for a cheap last-minute deal or the best return flight from Ottawa International Airport to Washington D.C.? If you want to travel next month, return fares start from $427. Find the lowest prices on one-way and return tickets right here.
      Washington D.C..$421 per passenger.Departing Sun, 11 Oct, returning Sun, 18 Oct.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Sun, 11 Oct, arriving in Washington Ronald Reagan.Inbound direct flight with Air Canada departs from Washington Ronald Reagan on Sun, 18 Oct, arriving in Ottawa International.Price includes taxes and charges.From $421, select.
      Washington D.C..$423 per passenger.Departing Thu, 22 Oct, returning Wed, 11 Nov.Return flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departs from Ottawa International on Thu, 22 Oct, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departs from Washington Dulles on Wed, 11 Nov, arriving in Ottawa International.Price includes taxes and charges.From $423, select.
      Washington D.C..$427 per passenger.Departing Fri, 18 Sep, returning Fri, 18 Sep.Return flight with United.Outbound indirect flight with United, departs from Ottawa International on Fri, 18 Sep, arriving in Washington Ronald Reagan.Inbound indirect flight with United, departs from Washington Dulles on Fri, 18 Sep, arriving in Ottawa International.Price includes taxes and charges.From $427, select.
      Washington D.C..$450 per passenger.Departing Sun, 27 Sep, returning Sat, 3 Oct.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Sun, 27 Sep, arriving in Washington Ronald Reagan.Inbound direct flight with Air Canada departs from Washington Ronald Reagan on Sat, 3 Oct, arriving in Ottawa International.Price includes taxes and charges.From $450, select.
      Washington D.C..$450 per passenger.Departing Tue, 17 Nov, returning Thu, 19 Nov.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Tue, 17 Nov, arriving in Washington Ronald Reagan.Inbound direct flight with Air Canada departs from Washington Ronald Reagan on Thu, 19 Nov, arriving in Ottawa International.Price includes taxes and charges.From $450, select.
      Washington D.C..$450 per passenger.Departing Wed, 23 Sep, returning Thu, 24 Sep.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Wed, 23 Sep, arriving in Washington Ronald Reagan.Inbound direct flight with Air Canada departs from Washington Ronald Reagan on Thu, 24 Sep, arriving in Ottawa International.Price includes taxes and charges.From $450, select.
      Washington D.C..$459 per passenger.Departing Wed, 2 Dec, returning Thu, 3 Dec.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Wed, 2 Dec, arriving in Washington Ronald Reagan.Inbound direct flight with Air Canada departs from Washington Ronald Reagan on Thu, 3 Dec, arriving in Ottawa International.Price includes taxes and charges.From $459, select.
      Washington D.C..$490 per passenger.Departing Sun, 31 Jan, returning Sun, 31 Jan.Return flight with United.Outbound indirect flight with United, departs from Ottawa International on Sun, 31 Jan, arriving in Washington Dulles.Inbound indirect flight with United, departs from Washington Ronald Reagan on Sun, 31 Jan, arriving in Ottawa International.Price includes taxes and charges.From $490, select.
      Washington D.C..$491 per passenger.Departing Thu, 22 Oct, returning Wed, 11 Nov.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Thu, 22 Oct, arriving in Washington Ronald Reagan.Inbound direct flight with Air Canada departs from Washington Ronald Reagan on Wed, 11 Nov, arriving in Ottawa International.Price includes taxes and charges.From $491, select.
      Washington D.C..$507 per passenger.Departing Fri, 26 Mar, returning Mon, 29 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Fri, 26 Mar, arriving in Washington Ronald Reagan.Inbound indirect flight with Air Canada, departs from Washington Ronald Reagan on Mon, 29 Mar, arriving in Ottawa International.Price includes taxes and charges.From $507, select.
      Washington D.C..$518 per passenger.Departing Sun, 22 Nov, returning Sun, 13 Dec.Return flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departs from Ottawa International on Sun, 22 Nov, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departs from Washington Dulles on Sun, 13 Dec, arriving in Ottawa International.Price includes taxes and charges.From $518, select.
      Washington D.C..$522 per passenger.Departing Sun, 31 Jan, returning Mon, 1 Feb.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Sun, 31 Jan, arriving in Washington Ronald Reagan.Inbound direct flight with Air Canada departs from Washington Ronald Reagan on Mon, 1 Feb, arriving in Ottawa International.Price includes taxes and charges.From $522, select.
      Washington D.C..$528 per passenger.Departing Mon, 21 Dec, returning Fri, 1 Jan.Return flight with United.Outbound direct flight with United departs from Ottawa International on Mon, 21 Dec, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Fri, 1 Jan, arriving in Ottawa International.Price includes taxes and charges.From $528, select.
      Washington D.C..$562 per passenger.Departing Thu, 26 Nov, returning Thu, 3 Dec.Return flight with United.Outbound direct flight with United departs from Ottawa International on Thu, 26 Nov, arriving in Washington Ronald Reagan.Inbound direct flight with United departs from Washington Ronald Reagan on Thu, 3 Dec, arriving in Ottawa International.Price includes taxes and charges.From $562, select.
      Washington D.C..$566 per passenger.Departing Sat, 9 Jan, returning Sun, 10 Jan.Return flight with United.Outbound direct flight with United departs from Ottawa International on Sat, 9 Jan, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Sun, 10 Jan, arriving in Ottawa International.Price includes taxes and charges.From $566, select.
      Washington D.C..$587 per passenger.Departing Sun, 14 Feb, returning Sun, 21 Feb.Return flight with United.Outbound direct flight with United departs from Ottawa International on Sun, 14 Feb, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Sun, 21 Feb, arriving in Ottawa International.Price includes taxes and charges.From $587, select.

      Find the cheapest month to fly from Ottawa International to Washington D.C.

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ottawa International to Washington D.C. flights are currently cheapest in October.
      Aug
      Find prices
      Sep
      from $428
      Oct
      from $422
      Nov
      from $452
      Dec
      from $461
      Jan
      from $492
      Feb
      from $589
      Mar
      from $509
      Apr
      Find prices
      May
      from $675
      Jun
      from $745
      Jul
      Find prices

      Direct flights from Ottawa International to Washington D.C.

      Air Canada
      Avianca
      United

      Alternative Ottawa International to Washington D.C. routes

      Looking for the cheapest, fastest or easiest route from Ottawa International to Washington D.C.? You could fly into the following airports instead.

      Washington Ronald Reagan

      5km from central Washington D.C.
      ClosestCheapest
      from $422
      Search flights

      Washington Dulles

      37km from central Washington D.C.
      from $423
      Search flights

      Baltimore Washington International

      44km from central Washington D.C.
      from $576
      Search flights

      Ottawa to Washington D.C.: Flight information

      The things to know before you go.
      Cheapest flight found$421
      Cheapest month to flyOctober
      Average flight time1 hr, 45 mins
      Most popular airlineUnited
      Average flights per week59

      Finding cheap flights from Ottawa International to Washington D.C.: Frequently asked questions

      There are 3 airports in Washington D.C.: Washington Ronald Reagan, Washington Dulles and Baltimore Washington International.
      The best price we found for a return flight from Ottawa International to Washington D.C. is $422. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      1 hour and 44 minutes is the average flight time from Ottawa International to Washington D.C..
      United, Air Canada and Avianca fly direct from Ottawa International to Washington D.C..
      As of August 2026, there are 59 flights per week flying from Ottawa International to Washington D.C..
      The cheapest month to fly from Ottawa International to Washington D.C. is usually October.
      If you're flying from Ottawa International Airport, the cheapest airport near Washington D.C. is Washington Ronald Reagan – which is 5.5 km away from the centre of Washington D.C.. We've found flights into this airport from $422.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ottawa International Airport to Washington D.C. on Sunday, 11 October 2026.
      Yes – the average flight time is 1 hour and 44 minutes.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington D.C. but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

      In August, the average temperature is usually around 25°C. July is typically the warmest month in Washington D.C., when it usually averages around 31°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -4°C. The rainiest month is September.
      Currently, Air Canada offers the cheapest flight tickets to Washington D.C..

      Travelling from Ottawa/Macdonald-Cartier International Airport (YOW) to Washington DC: what you need to know

      • The average duration of a direct flight from Ottawa/Macdonald-Cartier International Airport to Washington DC is 1 hour 35 minutes.

      • Washington DC and Ottawa (where Ottawa/Macdonald-Cartier International Airport is located) share the UTC-4 timezone. This means you won't have to adjust your watch after you land.

      • The most popular route is from Ottawa/Macdonald-Cartier International Airport (YOW) to Washington Dulles International Airport (IAD). You can choose from 23 weekly services between these two airports. If you want to take off as soon as possible, the earliest flight from YOW to IAD is the 05:45 United Airlines option. If you prefer to travel later, the final departure is at 19:30 with United Airlines.

      • For a relaxed start to your YOW to Washington DC flight, leave enough time to check in and find your gate. Arriving two hours before international departures and an hour before domestic flights is the general travel rule.

      • During popular months like August, you'll want to get to the airport even earlier. Arrive two hours before a domestic departure and four hours ahead of international flights whenever you're flying during peak periods in general.

      • You can book a direct Ottawa/Macdonald-Cartier International Airport to Washington DC ticket. Begin your journey at YOW and arrive at Ronald Reagan National Airport (DCA).

      • United Airlines is a well-known airline that offers direct flights from Ottawa/Macdonald-Cartier International Airport to Washington DC.

      • Located around 11 kilometres from the centre of Ottawa, YOW can be reached in about 20 minutes by car (depending on traffic). The journey on public transport will take roughly 45 minutes.

      • Catching an early flight from Ottawa/Macdonald-Cartier International Airport to Washington DC? Avoid rushing to the terminal (and enjoy a little extra shut-eye) by choosing one of these hotels near YOW:

      • 58.21% of flights that leave from Ottawa/Macdonald-Cartier International Airport make it to their destination on schedule.

      • You'll find YOW at 50 Airport Road.

      How to find the cheapest flights from Ottawa/Macdonald-Cartier International Airport (YOW) to Washington DC

      • $237 is currently the lowest price for a one-way Ottawa/Macdonald-Cartier International Airport to Washington DC flight. Return flight tickets start at $422. These prices can change based on availability and demand.

      • Score cheap flights from YOW to Washington DC by booking one month ahead. According to our research, that's the sweet spot for finding a bargain.

      • May is the best month for picking up an incredible deal on Ottawa/Macdonald-Cartier International Airport to Washington DC tickets. If you'd like to travel at a different time of year, the 'Whole month' tool will show you the lowest prices for each month.

      • You don't need to check in daily to find out if fares have dropped when you set up a Price Alert. We'll notify you the moment there's an updated deal for cheap flights from YOW to Washington DC.

      • Select your preferred departure and arrival times, airlines and number of stops with our filters. Then, sort the results for your flight from Ottawa/Macdonald-Cartier International Airport to Washington DC by 'Best,' 'Cheapest' or 'Fastest.'

      Airports in Washington DC

      Ronald Reagan National Airport (DCA)

      • The distance from Ronald Reagan National Airport (DCA) to central Washington DC is roughly 8 kilometres. It takes around 15 minutes to reach the centre driving.

      • If you're travelling by public transport, expect a journey time of around 45 minutes.

      • The last thing you want is a lengthy journey to your hotel if you're getting in late on a flight from Ottawa/Macdonald-Cartier International Airport to Washington DC. Reserve one of these accommodation options near DCA instead:

      • Grab a Ronald Reagan National Airport rental car and discover Washington DC and beyond with your own wheels. Thrifty, Sixt and Dollar are popular providers you can book with here.

      • Booking your vehicle from Ronald Reagan National Airport about four weeks in advance of your flight from YOW to Washington DC can help you lock in the lowest rate.

      • The address for DCA is 1 Aviation Circle.

      Washington Dulles International Airport (IAD)

      • Central Washington DC is around 56 kilometres from Washington Dulles International Airport (IAD). After your flight from Ottawa/Macdonald-Cartier International Airport to Washington DC has hit the runway and you've navigated your way to arrivals, the drive should be around 50 minutes.

      • If you travel by public transport, you'll get to the city centre in 1 hour 10 minutes or so.

      • There are some great places to park your luggage (and yourself) near IAD. Unwind and get cosy after your YOW to Washington DC flight at one of these perfectly located options:

      • Forget about inconvenient public transport timetables or long cab lines. Pick up a Washington Dulles International Airport rental car and go in any direction that inspires you. Check out the availability and rates from Dollar, Thrifty and Sixt.

      • Score the best price by securing your ride from IAD one week ahead of time. You'll also have access to a wider selection of vehicles.

      • The address for Washington Dulles International Airport is 1 Saarinen Circle.

      Baltimore/Wash International Thurgood Marshall Airport (BWI)

      • Baltimore/Wash International Thurgood Marshall Airport (BWI) is about 48 kilometres from central Washington DC. It takes about 50 minutes to reach the city centre by ride-share or taxi once you've stepped off your flight from Ottawa/Macdonald-Cartier International Airport to Washington DC.

      • The journey will take about 1 hour 30 minutes when travelling by public transport.

      • Enjoy a quiet, low-key start to your break by choosing a hotel near BWI after your YOW to Washington DC flight. Take a load off after a long travel day or just give yourself time to find your footing in a new city at:

      • Whether you'd like a zippy mini for a solo adventure or a spacious SUV to fit the whole crew comfortably, you'll find the perfect Baltimore/Wash International Thurgood Marshall Airport rental car for your needs. Explore the range of wheels available here from names such as Dollar, Thrifty and Budget.

      • If you're looking for a specific model or make, book your ride from BWI about two weeks before your flight from Ottawa/Macdonald-Cartier International Airport to Washington DC. This gives you a better chance of getting the car you prefer, along with a better deal.

      Best time to go to Washington DC

      • Plan your trip to Washington DC during the high season if you prefer a busy atmosphere, but remember that hotel prices are usually higher. Alternatively, book flights from Ottawa/Macdonald-Cartier International Airport to Washington DC during the off-season when prices are cheaper and it's less crowded.

      • Before booking an Ottawa/Macdonald-Cartier International Airport to Washington DC flight ticket, think about the kind of weather you prefer. July is the warmest month in Washington DC, with temperatures ranging from 19ºC (66ºF) to 33ºC (91ºF).

      • If you like travelling in cooler conditions, search for a cheap ticket from YOW to Washington DC in January when temperatures average between -6ºC (21ºF) and 10ºC (50ºF).

      More about Washington DC

      Explore more of United States

      • You've done Washington DC, now it's time to explore other corners of United States. Journey about 322 kilometres north-east to New York to tick off its popular sights. From Statue of Liberty to Central Park and Empire State Building, there's plenty to keep you on the go.

      • Philadelphia is another essential stop in United States and is around 193 kilometres north-east of Washington DC. No journey is complete without a visit to Liberty Bell, Independence Hall and Philadelphia Museum of Art.

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      Plan the rest of your trip from Ottawa to Washington D.C.

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.