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$147 Flights from Ottawa International (YOW) to Washington Dulles (IAD)

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

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Flight deals from Ottawa International Airport to Washington Dulles Airport

Looking for a cheap last-minute deal or the best round-trip flight from Ottawa International Airport to Washington Dulles Airport? If you want to travel next month, round-trip fares start from $256. Find the lowest prices on one-way and round-trip tickets right here.
Washington, D.C..$147 per passenger.Departing Wed, Mar 18.One-way flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Wed, Mar 18, arriving in Washington Dulles.Price includes taxes and charges.From $147, select.
Washington, D.C..$148 per passenger.Departing Fri, Feb 27.One-way flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Fri, Feb 27, arriving in Washington Dulles.Price includes taxes and charges.From $148, select.
Washington, D.C..$173 per passenger.Departing Fri, May 1.One-way flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Fri, May 1, arriving in Washington Dulles.Price includes taxes and charges.From $173, select.
Washington, D.C..$180 per passenger.Departing Sat, Apr 25.One-way flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Sat, Apr 25, arriving in Washington Dulles.Price includes taxes and charges.From $180, select.
Washington, D.C..$196 per passenger.Departing Fri, Apr 3.One-way flight with United.Outbound direct flight with United departing from Ottawa International on Fri, Apr 3, arriving in Washington Dulles.Price includes taxes and charges.From $196, select.
Washington, D.C..$196 per passenger.Departing Tue, Mar 10.One-way flight with Air Canada.Outbound direct flight with Air Canada departing from Ottawa International on Tue, Mar 10, arriving in Washington Dulles.Price includes taxes and charges.From $196, select.
Washington, D.C..$197 per passenger.Departing Fri, Feb 27.One-way flight with Air Canada.Outbound direct flight with Air Canada departing from Ottawa International on Fri, Feb 27, arriving in Washington Dulles.Price includes taxes and charges.From $197, select.
Washington, D.C..$207 per passenger.Departing Fri, May 1.One-way flight with United.Outbound direct flight with United departing from Ottawa International on Fri, May 1, arriving in Washington Dulles.Price includes taxes and charges.From $207, select.

Find the cheapest month to fly from Ottawa International to Washington Dulles

We’re always keeping an eye on fares, to help you find the lowest one in seconds. Check out the Ottawa International Airport to Washington Dulles Airport flight prices forecast over the next 12 months.
Jan
Find prices
Feb
from $148
Mar
from $147
Apr
from $180
May
from $173
Jun
from $216
Jul
from $208
Aug
from $242
Sep
from $290
Oct
Find prices
Nov
from $242
Dec
from $238
Cheapest month:March
Most expensive month:September

Direct flights from Ottawa International to Washington Dulles

Ottawa International to Washington Dulles: Alternative routes

Compare routes from Ottawa International 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

3 miles from central Washington, D.C.
Closest
from $167
Search flights

Camp Springs Andrews AFB

11 miles from central Washington, D.C.
Search flights

Washington Dulles

23 miles from central Washington, D.C.
from $147
Search flights

Baltimore Washington International

27 miles from central Washington, D.C.
Cheapest
from $141
Search flights

Manassas

29 miles from central Washington, D.C.
Search flights

Ottawa to Washington, D.C.: Flight information

The things to know before you go.
Cheapest flight found$147
Cheapest month to flyMarch
Average flight time1 hr, 51 mins
Most popular airlineUnited
Average flights per week84

Check out these Washington Dulles hotels

Ready to plan your stay? Other travelers rate these Washington Dulles hotels for cleanliness, service, and location.
Hyatt Regency Dulles International Airport
1.62 miles from Washington Dulles
$98
Per night
Candlewood Suites WASHINGTON-DULLES Herndon by IHG
1.35 miles from Washington Dulles
$96
Per night
Crowne Plaza Dulles Airport by IHG
2.55 miles from Washington Dulles
$113
Per night
Hyatt Regency Dulles International Airport
1.62 miles from Washington Dulles
$98
Per night
Candlewood Suites WASHINGTON-DULLES Herndon by IHG
1.35 miles from Washington Dulles
$96
Per night
Crowne Plaza Dulles Airport by IHG
2.55 miles from Washington Dulles
$113
Per night
Explore top-rated hotels

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

The best price we found for a round-trip flight from Ottawa International to Washington Dulles is $256. 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 51 minutes is the average flight time from Ottawa International to Washington Dulles.
United, Republic Airways and GoJet Airlines fly direct from Ottawa International to Washington Dulles.
There are 84 flights per week flying from Ottawa International to Washington Dulles, as of January 2026.
The cheapest month to fly from Ottawa International to Washington Dulles is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ottawa International Airport to Washington Dulles Airport on Thursday, April 9, 2026.
Yes – the average flight time is 1 hour and 51 minutes.
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.
Currently, Porter Airlines and United offer the cheapest flight tickets to Washington Dulles.

Flying from Ottawa/Macdonald-Cartier International Airport (YOW) to Washington Dulles International Airport (IAD): what you need to know

  • Take a direct flight from Ottawa/Macdonald-Cartier International Airport to Washington Dulles International Airport and you'll be in the air for an average of 1 hour 45 minutes.

  • Ottawa and Washington DC share the UTC-4 timezone. This means you won't have to change your watch when you arrive.

  • Take your pick of 29 weekly Ottawa/Macdonald-Cartier International Airport to Washington Dulles International Airport flights. The 09:45 departure with United Airlines is the earliest you can take. United Airlines operates the latest service of the day at 19:32.

  • Get to the airport on time so you don't miss your YOW to IAD flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.

  • Traveling during a peak time like July? School holidays and other popular periods can result in longer queues at airport checkpoints. Be extra cautious and arrive up to four hours before an international flight and two hours before a domestic departure.

  • Traveling to Washington DC (and then discovering more of United States!) is a breeze with United Airlines. This popular carrier offers direct flights from Ottawa/Macdonald-Cartier International Airport to Washington Dulles International Airport.

  • United Airlines is the airline with the highest passenger demand for this route.

  • United Airlines is the most punctual carrier that operates YOW to IAD flights, with 67.11% of its services landing on schedule.

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

  • $147 is currently the best price for a one-way Ottawa/Macdonald-Cartier International Airport to Washington Dulles International Airport flight. A return flight starts at $256. These prices can change based on availability.

  • To secure cheap tickets from YOW to IAD, book your journey six months before your planned departure.

  • Organize your trip for May. That's the cheapest month for flights from Ottawa/Macdonald-Cartier International Airport to Washington Dulles International Airport. If you're flexible with your travel dates, use the 'Whole month' tool to see the cheapest price across every month.

  • Save time looking for cheap flights from YOW to IAD by setting up a Price Alert. You'll receive an email or notification on the app when fares go down.

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

Handy information about Ottawa/Macdonald-Cartier International Airport (YOW)

  • You'll find YOW at 50 Airport Road.

  • Of all flights departing from Ottawa/Macdonald-Cartier International Airport, 58.21% arrive on time at their destination.

  • Central Ottawa to Ottawa/Macdonald-Cartier International Airport is around 8 miles. Depending on traffic, it'll take about 20 minutes to get there if you're driving, catching a cab or ride-sharing.

  • Taking public transport? Expect a trip time of around 45 minutes.

  • Have an early flight from Ottawa/Macdonald-Cartier International Airport to Washington Dulles International Airport? Avoid the stress of rushing to the terminal (and sneak in some extra precious sleep) by choosing one of these hotels close to YOW:

Arriving at Washington Dulles International Airport (IAD)

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

  • You'll find IAD at 1 Saarinen Circle.

  • From Washington Dulles International Airport, Washington DC is approximately 35 miles away. It takes around 50 minutes to reach the center driving.

  • Traveling by public transport will take you roughly 3 hours 25 minutes.

When to fly to Washington Dulles International Airport (IAD)

  • It's time to pick your trip dates for your flight from Ottawa/Macdonald-Cartier International Airport to Washington Dulles International Airport. April is the busiest month to head to Washington DC. If you'd like a more relaxed vibe, go in January.

  • When booking your flight from Ottawa/Macdonald-Cartier International Airport to Washington Dulles International Airport, think about the type of weather you like. July is the warmest month in Washington DC, with the temperature ranging from 66ºF to 91ºF.

  • January has average temperatures of between 21ºF and 50ºF. Search for cheap tickets from YOW to IAD sometime then if you want to travel when it's cooler.

Explore more of United States

  • You've seen Washington DC, now it's time to discover other parts of United States. Journey around 200 miles north-east to New York to check off its top attractions. From Statue of Liberty to Central Park and Empire State Building, your itinerary will be busy.

  • If you're looking to explore another major stop in United States, head for Philadelphia, about 120 miles north-east of Washington DC. Liberty Bell, Independence Hall and Philadelphia Museum of Art are among its highlights.

More travel options

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.