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Cheap flights from Ottawa to Washington Dulles

Compare Ottawa to Washington Dulles flight deals

Find the cheapest month or even day of the year to fly to Washington Dulles

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Flight deals from Ottawa to Washington Dulles

Looking for a cheap last-minute deal or the best round-trip flight from Ottawa to Washington Dulles Airport? If you want to travel next month, round-trip fares start from $325. Find the lowest prices on one-way and round-trip tickets right here.
Washington, D.C..$325 per passenger.Departing Fri, Jul 3, returning Mon, Jul 6.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Fri, Jul 3, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Mon, Jul 6, arriving in Ottawa International.Price includes taxes and charges.From $325, select.
Washington, D.C..$325 per passenger.Departing Wed, Jun 17, returning Wed, Jun 24.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Wed, Jun 17, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Wed, Jun 24, arriving in Ottawa International.Price includes taxes and charges.From $325, select.
Washington, D.C..$349 per passenger.Departing Fri, Aug 21, returning Mon, Aug 24.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Fri, Aug 21, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Mon, Aug 24, arriving in Ottawa International.Price includes taxes and charges.From $349, select.
Washington, D.C..$350 per passenger.Departing Sun, Jul 26, returning Sun, Aug 9.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Sun, Jul 26, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Sun, Aug 9, arriving in Ottawa International.Price includes taxes and charges.From $350, select.
Washington, D.C..$358 per passenger.Departing Wed, Oct 28, returning Sun, Nov 1.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Wed, Oct 28, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Sun, Nov 1, arriving in Ottawa International.Price includes taxes and charges.From $358, select.
Washington, D.C..$358 per passenger.Departing Wed, Nov 4, returning Sun, Nov 8.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Wed, Nov 4, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Sun, Nov 8, arriving in Ottawa International.Price includes taxes and charges.From $358, select.
Washington, D.C..$360 per passenger.Departing Sat, Jun 27, returning Tue, Jul 21.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Sat, Jun 27, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Tue, Jul 21, arriving in Ottawa International.Price includes taxes and charges.From $360, select.
Washington, D.C..$360 per passenger.Departing Fri, Sep 18, returning Sun, Sep 20.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Fri, Sep 18, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Sun, Sep 20, arriving in Ottawa International.Price includes taxes and charges.From $360, select.
Washington, D.C..$368 per passenger.Departing Wed, May 27, returning Thu, May 28.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Wed, May 27, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Thu, May 28, arriving in Ottawa International.Price includes taxes and charges.From $368, select.
Washington, D.C..$382 per passenger.Departing Fri, May 29, returning Fri, Jun 5.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Fri, May 29, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Fri, Jun 5, arriving in Ottawa International.Price includes taxes and charges.From $382, select.
Washington, D.C..$389 per passenger.Departing Mon, Jun 22, returning Mon, Jun 29.Round-trip flight with United.Outbound direct flight with United departing from Ottawa International on Mon, Jun 22, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Mon, Jun 29, arriving in Ottawa International.Price includes taxes and charges.From $389, select.
Washington, D.C..$398 per passenger.Departing Wed, Dec 9, returning Thu, Jan 7.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Wed, Dec 9, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Thu, Jan 7, arriving in Ottawa International.Price includes taxes and charges.From $398, select.
Washington, D.C..$404 per passenger.Departing Wed, Jul 8, returning Wed, Jul 15.Round-trip flight with United.Outbound direct flight with United departing from Ottawa International on Wed, Jul 8, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Wed, Jul 15, arriving in Ottawa International.Price includes taxes and charges.From $404, select.
Washington, D.C..$406 per passenger.Departing Thu, May 21, returning Mon, May 25.Round-trip flight with United.Outbound direct flight with United departing from Ottawa International on Thu, May 21, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Mon, May 25, arriving in Ottawa International.Price includes taxes and charges.From $406, select.
Washington, D.C..$406 per passenger.Departing Fri, Aug 28, returning Sun, Aug 30.Round-trip flight with United.Outbound direct flight with United departing from Ottawa International on Fri, Aug 28, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Sun, Aug 30, arriving in Ottawa International.Price includes taxes and charges.From $406, select.
Washington, D.C..$420 per passenger.Departing Fri, Oct 2, returning Wed, Oct 14.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Fri, Oct 2, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Wed, Oct 14, arriving in Ottawa International.Price includes taxes and charges.From $420, select.

Find the cheapest month to fly from Ottawa to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ottawa to Washington Dulles flights are currently cheapest in June.
May
from $368
Jun
from $325
Jul
from $325
Aug
from $349
Sep
from $360
Oct
from $420
Nov
from $358
Dec
from $440
Jan
from $475
Feb
Find prices
Mar
Find prices
Apr
from $576

Direct flights from Ottawa to Washington Dulles

Ottawa to Washington Dulles: Alternative routes

Compare routes from Ottawa to Washington, D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

Washington Ronald Reagan

5km from central Washington, D.C.
Closest
from $364
Search flights

Camp Springs Andrews AFB

17km from central Washington, D.C.
Search flights

Washington Dulles

37km from central Washington, D.C.
Cheapest
from $325
Search flights

Baltimore Washington International

44km from central Washington, D.C.
from $367
Search flights

Manassas

47km from central Washington, D.C.
Search flights

Ottawa to Washington, D.C.: Flight information

The things to know before you go.
Cheapest flight found$325
Cheapest month to flyJuly
Average flight time1 hr, 45 mins
Most popular airlineUnited
Average flights per week156

Finding cheap flights from Ottawa to Washington Dulles: Frequently asked questions

The best price we found for a round-trip flight from Ottawa to Washington Dulles is $325. 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 45 minutes is the average flight time from Ottawa to Washington Dulles.
United, Air Canada and Republic Airways fly direct from Ottawa to Washington Dulles.
There are 156 flights per week flying from Ottawa to Washington Dulles, as of May 2026.
The cheapest month to fly from Ottawa to Washington Dulles is usually July.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ottawa to Washington Dulles Airport on Friday, July 3, 2026.
Yes – the average flight time is 1 hour and 45 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 Dulles 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.

Flying from Ottawa to Washington Dulles International Airport (IAD): What you need to know

  • Ottawa's main base, Ottawa Macdonald-Cartier International Airport (YOW), is where plenty of awesome adventures begin. Explore the departure options from here when searching for a flight from Ottawa to Washington Dulles International Airport (IAD).

  • Expect to be in the air for 1 hour 45 minutes. On average, that's the time it takes for a direct Ottawa to Washington Dulles International Airport flight.

  • Washington DC's timezone is UTC-5, which is the same as Ottawa. Washington Dulles International Airport is located in Washington DC.

  • With 21 direct flights a week between the two airports, Ottawa Macdonald-Cartier International Airport (YOW) to Washington Dulles International Airport (IAD) is the busiest route. United Airlines operates the earliest flight at 5:45am. If you prefer to get more out of your day before leaving, the last departure from YOW to IAD is with United Airlines at 7:30pm.

  • Your flight from Ottawa to IAD won't wait if you're running late, so show up at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.

  • Flying during a popular month like August? School holidays and other popular seasons can lead to longer lines at check-in and security. Play things extra safe and arrive up to four hours ahead of an international flight and two hours before a domestic departure.

Airports in Ottawa

Ottawa Macdonald-Cartier International Airport (YOW)

  • You can jump on a direct flight from Ottawa to Washington Dulles International Airport (IAD) leaving from Ottawa Macdonald-Cartier International Airport (YOW).

  • United Airlines is a popular airline that operates direct flights from Ottawa to Washington Dulles International Airport departing from YOW.

  • Most passengers prefer to book seats with United from YOW to IAD.

  • The top on-time carrier on this route is United. Its services arrive as scheduled 67.11% of the time.

  • YOW is around 14 kilometers from central Ottawa. If you're catching a cab, driving or ride-sharing from the center, it'll take you 20 minutes or so to get there, depending on traffic. If you're using public transport, expect the trip time to be around 35 minutes.

  • Planning to catch an early flight from Ottawa to Washington Dulles International Airport? Avoid the hassle of rushing to the terminal (and enjoy a little extra shut-eye) by staying at one of these hotels near Ottawa Macdonald-Cartier International Airport:

  • Of all flights leaving Ottawa Macdonald-Cartier International Airport, 58% land on schedule at their destination.

  • YOW is located at 50 Airport Road.

About Washington Dulles International Airport (IAD)

Getting from Washington Dulles International Airport (IAD) to central Washington DC

  • From Washington Dulles International Airport, central Washington DC is around 40 kilometers away. It takes about 45 minutes to reach the city center by car.

  • It typically takes 1 hour 10 minutes if you're traveling on public transport.

How to find the cheapest flights from Ottawa to Washington Dulles International Airport (IAD)

  • $177 is the best price for a one-way ticket from Ottawa to Washington Dulles International Airport. A return flight starts from $325. These prices may change based on demand.

  • Don't leave things to the last moment. You're more likely to walk away with cheap flights from Ottawa to IAD if you book in advance. Airlines often have some amazing early bird deals.

  • Cheap Ottawa to Washington Dulles International Airport tickets are easier to find if you're not locked into specific dates. Use the 'Whole month' search function to compare fares across each month and then pick the cheapest day.

  • You don't need to check back in every day to find out if fares have dropped when you set up a Price Alert. We'll let you know the moment there's a better deal on plane tickets from Ottawa to IAD.

  • Tailor your trip using filters. Choose your arrival and departure times, total journey duration and airlines. You can also sort your results by 'Fastest,' 'Cheapest' or 'Best' flights from Ottawa to Washington Dulles International Airport.

The best time to fly from Ottawa to Washington Dulles International Airport (IAD)

  • May is the busiest month for flights from Ottawa to Washington Dulles International Airport (IAD). Plan your visit to Washington DC in February for a more low-key escape.

  • Book a Ottawa to IAD plane ticket departing in July if you want to visit the city during its warmest month. Expect temperatures in Washington DC to range from 19ºC (66ºF) to 33ºC (91ºF).

  • If you like cooler conditions, search for a cheap ticket from Ottawa to Washington Dulles International Airport in January when temperatures are between -6ºC (21ºF) and 10ºC (50ºF).

More about Washington DC

Explore more of the United States

  • Philadelphia is just one of the many cities in the United States waiting to be discovered once you've seen the sights of Washington DC. Around 225 kilometers away to the northeast, top sights here include Independence Hall, Liberty Bell and Philadelphia Museum of Art.

  • If you want to check out another corner of the United States, head for Virginia Beach, about 274 kilometers southeast of Washington DC. Virginia Beach Oceanfront, Virginia Beach Boardwalk and Resort Beach are the start of reasons to visit.

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 45 days.