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Cheap flights from Ottawa to Washington, D.C. from $145

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 9/12. 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

Porter Airlines Logo
8:35 am - 3:06 pmYOW-IAD
6h 31m1 stop
Porter Airlines Logo
4:20 pm - 8:34 pmIAD-YOW
4h 14m1 stop
$237Porter Airlines
Find Deal
Sun, Sep 14 - Fri, Sep 19
Porter Airlines Logo
9:35 am - 2:56 pmYOW-IAD
5h 21m1 stop
Porter Airlines Logo
11:35 am - 5:04 pmIAD-YOW
5h 29m1 stop
$253Porter Airlines
Find Deal
Sat, Aug 30 - Thu, Sep 4
Lufthansa Logo
7:29 pm - 9:12 pmYOW-IAD
1h 43mnonstop
Lufthansa Logo
6:20 am - 11:45 amIAD-YOW
5h 25m1 stop
$285Lufthansa
Find Deal
Sat, Sep 13 - Sun, Sep 14
United Airlines Logo
2:48 pm - 8:41 pmYOW-IAD
5h 53m1 stop
United Airlines Logo
8:16 am - 9:58 amIAD-YOW
1h 42mnonstop
$288United Airlines
Find Deal
Sat, Sep 13 - Sun, Sep 14
United Airlines Logo
2:45 pm - 4:28 pmYOW-IAD
1h 43mnonstop
United Airlines Logo
8:16 am - 9:58 amIAD-YOW
1h 42mnonstop
$306United Airlines
Find Deal
Thu, Aug 21 - Thu, Aug 28
Air Canada Logo
2:50 pm - 8:59 pmYOW-IAD
6h 09m1 stop
Air Canada Logo
9:00 am - 3:23 pmIAD-YOW
6h 23m1 stop
$322Air Canada
Find Deal
Thu, Jan 15 - Mon, Jan 19
Air Canada Logo
5:15 am - 9:37 amYOW-IAD
4h 22m1 stop
Air Canada Logo
9:35 am - 1:51 pmIAD-YOW
4h 16m1 stop
$324Air Canada
Find Deal
Wed, Aug 27 - Wed, Sep 3
Lufthansa Logo
7:29 pm - 9:12 pmYOW-IAD
1h 43mnonstop
Lufthansa Logo
8:16 am - 9:58 amIAD-YOW
1h 42mnonstop
$325Lufthansa
Find Deal
Thu, Aug 21 - Mon, Aug 25
Logo
5:55 am - 3:06 pmYOW-IAD
9h 11m1 stop
Logo
11:35 am - 6:09 pmIAD-YOW
6h 34m1 stop
$347
Find Deal
Tue, Sep 23 - Fri, Sep 26
Logo
9:35 am - 2:56 pmYOW-IAD
5h 21m1 stop
Logo
10:20 am - 3:05 pmIAD-YOW
4h 45m1 stop
$365
Find Deal
Mon, Aug 18 - Wed, Aug 20

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
Sep 14
YOW8:35 amOttawa
6h 31m
1 stop
IAD3:06 pmWashington, D.C. Dulles Intl
Sep 19
IAD4:20 pmWashington, D.C. Dulles Intl
4h 14m
1 stop
YOW8:34 pmOttawa
$237
Find similar
Porter Airlines
Aug 30
YOW9:35 amOttawa
5h 21m
1 stop
IAD2:56 pmWashington, D.C. Dulles Intl
Sep 4
IAD11:35 amWashington, D.C. Dulles Intl
5h 29m
1 stop
YOW5:04 pmOttawa
$253
Find similar
Porter Airlines
Aug 21
YOW11:00 amOttawa
3h 56m
1 stop
IAD2:56 pmWashington, D.C. Dulles Intl
Aug 25
IAD4:10 pmWashington, D.C. Dulles Intl
3h 28m
1 stop
YOW7:38 pmOttawa
$275
Find similar

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
Sep 13
YOW2:48 pmOttawa
5h 53m
1 stop
IAD8:41 pmWashington, D.C. Dulles Intl
Sep 14
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
$288
Find similar
United Airlines
Aug 21
YOW2:45 pmOttawa
1h 43m
IAD4:28 pmWashington, D.C. Dulles Intl
Aug 28
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
$306
Find similar
United Airlines
Aug 21
YOW2:45 pmOttawa
1h 43m
IAD4:28 pmWashington, D.C. Dulles Intl
Aug 25
IAD8:16 amWashington, D.C. Dulles Intl
1h 42m
YOW9:58 amOttawa
$309
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 July 31, 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

Sun 9/14

8:35 am-3:06 pm

1 stop6h 31m

Washington, D.C. Dulles Intl

Fri 9/19

4:20 pm-8:34 pm

1 stop4h 14m

$237

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 8/30

9:35 am-2:56 pm

1 stop5h 21m

Washington, D.C. Dulles Intl

Thu 9/4

11:35 am-5:04 pm

1 stop5h 29m

$253

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 9/13

7:29 pm-9:12 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sun 9/14

6:20 am-11:45 am

1 stop5h 25m

$285

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 9/13

2:48 pm-8:41 pm

1 stop5h 53m

Washington, D.C. Dulles Intl

Sun 9/14

8:16 am-9:58 am

Nonstop1h 42m

$288

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 8/21

2:45 pm-4:28 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Thu 8/28

8:16 am-9:58 am

Nonstop1h 42m

$306

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 1/15

2:50 pm-8:59 pm

1 stop6h 09m

Washington, D.C. Dulles Intl

Mon 1/19

9:00 am-3:23 pm

1 stop6h 23m

$322

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 8/27

5:15 am-9:37 am

1 stop4h 22m

Washington, D.C. Dulles Intl

Wed 9/3

9:35 am-1:51 pm

1 stop4h 16m

$324

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 8/21

7:29 pm-9:12 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Mon 8/25

8:16 am-9:58 am

Nonstop1h 42m

$325

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 9/23

5:55 am-3:06 pm

1 stop9h 11m

Washington, D.C. Dulles Intl

Fri 9/26

11:35 am-6:09 pm

1 stop6h 34m

$347

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 8/18

9:35 am-2:56 pm

1 stop5h 21m

Washington, D.C. Dulles Intl

Wed 8/20

10:20 am-3:05 pm

1 stop4h 45m

$365

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 March 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 $597. 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 $780.

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 $607 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 $722 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 $369 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 $277 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.

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

As of July 2025, prices for Ottawa to Washington, D.C. Dulles Intl Airport flights are approximately 13% 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

$145

Fastest flight time

1h 35m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Ottawa in the past 72 hours is $145. The best round-trip flight deal from Ottawa to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $237.
The fastest flight from Ottawa to Washington, D.C. Dulles Intl Airport takes 1h 35m
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
8.0
318 reviews
Search Porter Airlines flights
United AirlinesPriceFrom $240Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
Air CanadaPriceFrom $280Free CancellationRating
7.1
9,851 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 $429, with the best United Airlines deals starting from $240 round-trip. 8,900 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 9,851 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 $466, with deals from around $280 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
Arlington
National Harbor
Winchester
Woodbridge
Laurel
Tysons
Silver Spring
Waldorf
Fredericksburg
Manassas
Harpers Ferry
Towson
Rockville
Colonial Beach
Gaithersburg
Fairfax
Reston
Glen Burnie

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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