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Cheap flights from Ottawa to Washington, D.C. from $183

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 4/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Porter Airlines Logo
1:20 pm - 5:14 pm
YOW
-
IAD
3h 54m
1 stop
Porter Airlines Logo
4:05 pm - 8:04 pm
IAD
-
YOW
3h 59m
1 stop
$304Porter Airlines
Sun, Apr 26 - Fri, May 1
Porter Airlines Logo
6:45 am - 10:54 am
YOW
-
IAD
4h 09m
1 stop
Porter Airlines Logo
11:40 am - 3:04 pm
IAD
-
YOW
3h 24m
1 stop
$314Porter Airlines
Mon, Apr 13 - Wed, Apr 22
Porter Airlines Logo
1:20 pm - 5:14 pm
YOW
-
IAD
3h 54m
1 stop
Porter Airlines Logo
11:40 am - 5:04 pm
IAD
-
YOW
5h 24m
1 stop
$315Porter Airlines
Sun, Apr 26 - Thu, Apr 30
Porter Airlines Logo
1:20 pm - 5:14 pm
YOW
-
IAD
3h 54m
1 stop
Porter Airlines Logo
11:40 am - 5:04 pm
IAD
-
YOW
5h 24m
1 stop
$316Porter Airlines
Sun, Apr 26 - Thu, Apr 30
Porter Airlines Logo
6:50 am - 10:54 am
YOW
-
IAD
4h 04m
1 stop
Porter Airlines Logo
11:40 am - 4:44 pm
IAD
-
YOW
5h 04m
1 stop
$318Porter Airlines
Thu, Apr 23 - Mon, Apr 27
Porter Airlines Logo
6:50 am - 10:54 am
YOW
-
IAD
4h 04m
1 stop
Porter Airlines Logo
11:40 am - 4:44 pm
IAD
-
YOW
5h 04m
1 stop
$319Porter Airlines
Thu, Apr 23 - Mon, Apr 27
Porter Airlines Logo
8:40 am - 12:59 pm
YOW
-
IAD
4h 19m
1 stop
Porter Airlines Logo
6:00 pm - 10:29 pm
IAD
-
YOW
4h 29m
1 stop
$321Porter Airlines
Sat, Apr 11 - Sun, Apr 12
United Airlines Logo
5:50 pm - 11:25 pm
YOW
-
IAD
5h 35m
1 stop
United Airlines Logo
8:15 am - 10:03 am
IAD
-
YOW
1h 48mnonstop
$327United Airlines
Sat, May 9 - Sun, May 10
United Airlines Logo
5:50 pm - 11:25 pm
YOW
-
IAD
5h 35m
1 stop
United Airlines Logo
8:15 am - 10:03 am
IAD
-
YOW
1h 48mnonstop
$336United Airlines
Sat, May 2 - Sun, May 3
United Airlines Logo
5:50 pm - 11:25 pm
YOW
-
IAD
5h 35m
1 stop
United Airlines Logo
8:15 am - 10:03 am
IAD
-
YOW
1h 48mnonstop
$338United Airlines
Sat, Apr 11 - Sun, Apr 12

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

Our best Porter Airlines deals on Ottawa to Washington, D.C. Dulles Intl Airport flight tickets
Porter Airlines
Apr 26
YOW1:20 pmOttawa
3h 54m
1 stop
IAD5:14 pmWashington, D.C. Dulles Intl
May 1
IAD4:05 pmWashington, D.C. Dulles Intl
3h 59m
1 stop
YOW8:04 pmOttawa
$304
Porter Airlines
Apr 13
YOW6:45 amOttawa
4h 09m
1 stop
IAD10:54 amWashington, D.C. Dulles Intl
Apr 22
IAD11:40 amWashington, D.C. Dulles Intl
3h 24m
1 stop
YOW3:04 pmOttawa
$314
Porter Airlines
Apr 26
YOW1:20 pmOttawa
3h 54m
1 stop
IAD5:14 pmWashington, D.C. Dulles Intl
Apr 30
IAD11:40 amWashington, D.C. Dulles Intl
5h 24m
1 stop
YOW5:04 pmOttawa
$315

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
May 9
YOW5:50 pmOttawa
5h 35m
1 stop
IAD11:25 pmWashington, D.C. Dulles Intl
May 10
IAD8:15 amWashington, D.C. Dulles Intl
1h 48m
YOW10:03 amOttawa
$327
United Airlines
May 2
YOW5:50 pmOttawa
5h 35m
1 stop
IAD11:25 pmWashington, D.C. Dulles Intl
May 3
IAD8:15 amWashington, D.C. Dulles Intl
1h 48m
YOW10:03 amOttawa
$336
United Airlines
Apr 11
YOW5:50 pmOttawa
5h 35m
1 stop
IAD11:25 pmWashington, D.C. Dulles Intl
Apr 12
IAD8:15 amWashington, D.C. Dulles Intl
1h 48m
YOW10:03 amOttawa
$338

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 March 15, 2026.
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

Cheapest round-trip

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 4/26

1:20 pm-5:14 pm

1 stop3h 54m

Washington, D.C. Dulles Intl

Fri 5/1

4:05 pm-8:04 pm

1 stop3h 59m

$304

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 4/13

6:45 am-10:54 am

1 stop4h 09m

Washington, D.C. Dulles Intl

Wed 4/22

11:40 am-3:04 pm

1 stop3h 24m

$314

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 4/26

1:20 pm-5:14 pm

1 stop3h 54m

Washington, D.C. Dulles Intl

Thu 4/30

11:40 am-5:04 pm

1 stop5h 24m

$315

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 4/26

1:20 pm-5:14 pm

1 stop3h 54m

Washington, D.C. Dulles Intl

Thu 4/30

11:40 am-5:04 pm

1 stop5h 24m

$316

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 4/23

6:50 am-10:54 am

1 stop4h 04m

Washington, D.C. Dulles Intl

Mon 4/27

11:40 am-4:44 pm

1 stop5h 04m

$318

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 4/23

6:50 am-10:54 am

1 stop4h 04m

Washington, D.C. Dulles Intl

Mon 4/27

11:40 am-4:44 pm

1 stop5h 04m

$319

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 4/11

8:40 am-12:59 pm

1 stop4h 19m

Washington, D.C. Dulles Intl

Sun 4/12

6:00 pm-10:29 pm

1 stop4h 29m

$321
Quickest round-trip

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 5/9

5:50 pm-11:25 pm

1 stop5h 35m

Washington, D.C. Dulles Intl

Sun 5/10

8:15 am-10:03 am

Nonstop1h 48m

$327

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 5/2

5:50 pm-11:25 pm

1 stop5h 35m

Washington, D.C. Dulles Intl

Sun 5/3

8:15 am-10:03 am

Nonstop1h 48m

$336

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 4/11

5:50 pm-11:25 pm

1 stop5h 35m

Washington, D.C. Dulles Intl

Sun 4/12

8:15 am-10:03 am

Nonstop1h 48m

$338

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 $302. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of April, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $306.

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 $552. When flying out on a Sunday, 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 $720.

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 morning is the least expensive time of day to depart. momondo users have found prices as low as $552 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $703 on average. Flights to Washington, D.C. Dulles Intl Airport from Ottawa at noon 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

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 17% 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 March 2026, prices for Ottawa to Washington, D.C. Dulles Intl Airport flights are approximately 3% cheaper 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

$269

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 $269. The best round-trip flight deal from Ottawa to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $374.
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
United AirlinesPriceFrom $338Free CancellationRating
7.4
9,427 reviews
Search United Airlines flights
Air CanadaPriceFrom $388Free CancellationRating
7.1
10,801 reviews
Search Air Canada flights

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

    Across 20 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 $338 round-trip. 9,427 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 10,801 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 $420, with deals from around $388 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
National Harbor
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Colonial Beach
Laurel
Towson
Gaithersburg
Silver Spring
Fredericksburg
Rockville
Tysons
Manassas
Springfield
Linthicum Heights
Bethesda
Sterling

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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