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Cheap flights from Ottawa to Washington, D.C. from $167

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to Washington, D.C. departing on 9/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

United Airlines Logo
5:50 pm - 10:33 pmYOW-IAD
4h 43m1 stop
United Airlines Logo
8:16 am - 9:58 amIAD-YOW
1h 42mnonstop
$303United Airlines
Find Deal
Fri, Oct 3 - Sat, Oct 4
Porter Airlines Logo
11:00 am - 3:06 pmYOW-IAD
4h 06m1 stop
Porter Airlines Logo
11:35 am - 4:34 pmIAD-YOW
4h 59m1 stop
$310Porter Airlines
Find Deal
Fri, Oct 3 - Sun, Oct 5
United Airlines Logo
7:29 pm - 9:12 pmYOW-IAD
1h 43mnonstop
United Airlines Logo
8:25 am - 9:09 pmIAD-YOW
12h 44m2 stops
$312United Airlines
Find Deal
Fri, Oct 3 - Sat, Oct 4
Porter Airlines Logo
12:10 pm - 5:14 pmYOW-IAD
5h 04m1 stop
Porter Airlines Logo
11:40 am - 5:29 pmIAD-YOW
5h 49m1 stop
$315Porter Airlines
Find Deal
Tue, Dec 16 - Mon, Jan 12
Porter Airlines Logo
7:00 am - 10:16 amYOW-IAD
3h 16m1 stop
Porter Airlines Logo
4:20 pm - 8:34 pmIAD-YOW
4h 14m1 stop
$316Porter Airlines
Find Deal
Mon, Oct 6 - Fri, Oct 17
Porter Airlines Logo
11:00 am - 3:06 pmYOW-IAD
4h 06m1 stop
Porter Airlines Logo
11:35 am - 4:34 pmIAD-YOW
4h 59m1 stop
$319Porter Airlines
Find Deal
Fri, Oct 3 - Sun, Oct 5
Porter Airlines Logo
8:40 am - 5:14 pmYOW-IAD
8h 34m1 stop
Porter Airlines Logo
11:40 am - 5:29 pmIAD-YOW
5h 49m1 stop
$320Porter Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6
Lufthansa Logo
7:29 pm - 9:12 pmYOW-IAD
1h 43mnonstop
Lufthansa Logo
6:15 am - 11:45 amIAD-YOW
5h 30m1 stop
$346Lufthansa
Find Deal
Fri, Oct 10 - Sun, Oct 12
Air Canada Logo
7:29 pm - 9:12 pmYOW-IAD
1h 43mnonstop
Air Canada Logo
8:16 am - 9:58 amIAD-YOW
1h 42mnonstop
$397Air Canada
Find Deal
Sat, Oct 11 - Sat, Oct 18
Air Canada Logo
7:30 pm - 9:22 pmYOW-IAD
1h 52mnonstop
Air Canada Logo
12:42 pm - 2:27 pmIAD-YOW
1h 45mnonstop
$398Air Canada
Find Deal
Thu, Oct 30 - Thu, Nov 6

United Airlines flights from Ottawa to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Ottawa to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
Oct 3
YOW5:50 pmOttawa
4h 43m
1 stop
IAD10:33 pmWashington, D.C. Dulles Intl
Oct 4
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
$303
Find similar
United Airlines
Oct 3
YOW7:29 pmOttawa
1h 43m
IAD9:12 pmWashington, D.C. Dulles Intl
Oct 4
IAD8:25 amWashington, D.C. Dulles Intl
12h 44m
2 stops
YOW9:09 pmOttawa
$312
Find similar
United Airlines
Oct 3
YOW7:29 pmOttawa
1h 43m
IAD9:12 pmWashington, D.C. Dulles Intl
Oct 4
IAD6:15 amWashington, D.C. Dulles Intl
6h 01m
1 stop
YOW12:16 pmOttawa
$338
Find similar

Air Canada flights from Ottawa to Washington, D.C. Dulles Intl Airport

Our best Air Canada deals on Ottawa to Washington, D.C. Dulles Intl Airport flight tickets
Air Canada
Oct 11
YOW7:29 pmOttawa
1h 43m
IAD9:12 pmWashington, D.C. Dulles Intl
Oct 18
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
$397
Find similar
Air Canada
Oct 30
YOW7:30 pmOttawa
1h 52m
IAD9:22 pmWashington, D.C. Dulles Intl
Nov 6
IAD12:42 pmWashington, D.C. Dulles Intl
1h 45m
YOW2:27 pmOttawa
$398
Find similar
Air Canada
Oct 29
YOW7:30 pmOttawa
1h 52m
IAD9:22 pmWashington, D.C. Dulles Intl
Nov 5
IAD10:12 pmWashington, D.C. Dulles Intl
1h 42m
YOW11:54 pmOttawa
$409
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Ottawa to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 10/3

5:50 pm-10:33 pm

1 stop4h 43m

Washington, D.C. Dulles Intl

Sat 10/4

8:16 am-9:58 am

Nonstop1h 42m

$303

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 10/3

11:00 am-3:06 pm

1 stop4h 06m

Washington, D.C. Dulles Intl

Sun 10/5

11:35 am-4:34 pm

1 stop4h 59m

$310

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 10/3

7:29 pm-9:12 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sat 10/4

8:25 am-9:09 pm

2 stops12h 44m

$312

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 12/16

12:10 pm-5:14 pm

1 stop5h 04m

Washington, D.C. Dulles Intl

Mon 1/12

11:40 am-5:29 pm

1 stop5h 49m

$315

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 10/6

7:00 am-10:16 am

1 stop3h 16m

Washington, D.C. Dulles Intl

Fri 10/17

4:20 pm-8:34 pm

1 stop4h 14m

$316

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 10/3

11:00 am-3:06 pm

1 stop4h 06m

Washington, D.C. Dulles Intl

Sun 10/5

11:35 am-4:34 pm

1 stop4h 59m

$319

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 10/30

8:40 am-5:14 pm

1 stop8h 34m

Washington, D.C. Dulles Intl

Thu 11/6

11:40 am-5:29 pm

1 stop5h 49m

$320

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 10/10

7:29 pm-9:12 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sun 10/12

6:15 am-11:45 am

1 stop5h 30m

$346

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 10/11

7:29 pm-9:12 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sat 10/18

8:16 am-9:58 am

Nonstop1h 42m

$397

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 10/30

7:30 pm-9:22 pm

Nonstop1h 52m

Washington, D.C. Dulles Intl

Thu 11/6

12:42 pm-2:27 pm

Nonstop1h 45m

$398

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Ottawa to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, April is the cheapest month to fly from Ottawa to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $311. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of April, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $317.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Wednesday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $592. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Ottawa to Washington, D.C. Dulles Intl Airport for around $761.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Ottawa in the evening is the least expensive time of day to depart. momondo users have found prices as low as $604 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $742 on average. Flights to Washington, D.C. Dulles Intl Airport from Ottawa in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Ottawa to Washington, D.C. Dulles Intl flight route?

Fly from Ottawa to Washington, D.C. Dulles Intl for the best Ottawa - Washington, D.C. Dulles Intl flight prices

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $400 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Ottawa for as low as $250 on momondo.

What cabin class options are available on Ottawa to Washington, D.C. Dulles Intl flights?

There are 4 cabin classes available to choose from on Ottawa to Washington, D.C. Dulles Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ottawa to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 22% on your flight if you consider stops on a Ottawa to Washington, D.C. Dulles Intl Airport flight.

How have Ottawa to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of September 2025, prices for Ottawa to Washington, D.C. Dulles Intl Airport flights are approximately 9% more expensive when compared to flights at the same time last year.

When to book flights from Ottawa to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ottawa to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ottawa to Washington, D.C. Dulles Intl Airport (YOW to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to Washington, D.C. Dulles Intl Airport

Best Price Found

$326

Fastest flight time

1h 43m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Ottawa in the past 72 hours is $326. The best round-trip flight deal from Ottawa to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $495.
The fastest flight from Ottawa to Washington, D.C. Dulles Intl Airport takes 1h 43m
Direct flights go from Ottawa to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

  • How far is Ottawa to Washington, D.C. Dulles Intl by plane?

    The distance between Ottawa and Washington, D.C. Dulles Intl is about 455.4 mi. By plane, this route typically takes 1h 43m.

  • When did momondo last update prices for flights from Ottawa Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Ottawa Airport to Washington, D.C. Dulles Intl Airport are updated daily.

  • How many operators does momondo search for flights from Ottawa Airport to Washington, D.C. Dulles Intl Airport?

  • How old do you have to be to fly from Ottawa Airport to Washington, D.C. Dulles Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ottawa Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Ottawa to Washington, D.C. Dulles Intl Airport?

  • What is the most popular airline from Ottawa to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Ottawa to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Ottawa to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Porter AirlinesPriceFrom $197Free CancellationRating
7.9
363 reviews
Search Porter Airlines flights
United AirlinesPriceFrom $281Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
Air CanadaPriceFrom $312Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights

  • United Airlines Flights From Ottawa to Washington, D.C. Dulles Intl Airport

    Across 21 United Airlines flights from Ottawa to Washington, D.C. Dulles Intl Airport this week, the average price was $443, with the best United Airlines deals starting from $281 round-trip. 8,929 users have rated United Airlines on momondo, with an average score of 7.4/10.

  • Air Canada Flights From Ottawa to Washington, D.C. Dulles Intl Airport

    Air Canada (7.1/10 from 10,000 reviews) operates around 21 flights from Ottawa to Washington, D.C. Dulles Intl Airport in any given week. The average Air Canada airfare for this route is around $470, with deals from around $312 rare but found on momondo. Referenced prices are for round-trip Ottawa to Washington, D.C. Dulles Intl Airport flight searches in the last 72 hours.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Gettysburg
National Harbor
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Manassas
Reston
Fairfax
Glen Burnie
Gaithersburg

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to Washington, D.C.?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ottawa to Washington, D.C.. momondo saves you time and could save you money on your trip.

Can I find flights from Ottawa to Washington, D.C. with flexible booking policies on momondo?

All flight searches from Ottawa to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ottawa to Washington, D.C.?

Once all potential Ottawa to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ottawa to Washington, D.C. right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Ottawa and alert you when they change.

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