Cheap flights from Ottawa to Washington, D.C. from $174
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 11/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Find the cheapest flights from Ottawa to Washington, D.C.
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Porter Airlines flights from Ottawa to Washington, D.C.
Our best Porter Airlines deals on Ottawa to Washington, D.C. flight tickets
United Airlines flights from Ottawa to Washington, D.C.
Our best United Airlines deals on Ottawa to Washington, D.C. flight tickets
momondo Fare Finder
Use the filters below to find and compare flights from Ottawa to Washington, D.C. that are best for you.
Fly from
Fly to
Route
Depart
Return
OttawaWashington, D.C.
YOW Ottawa - IAD Washington, D.C. Dulles Intl
YOWIAD
Ottawa
Fri 10/23
10:40 am-3:10 pm
1 stop4h 30m
Washington, D.C. Dulles Intl
Sun 10/25
11:20 am-4:09 pm
1 stop4h 49m
OttawaWashington, D.C.
YOW Ottawa - IAD Washington, D.C. Dulles Intl
YOWIAD
Ottawa
Mon 11/2
12:15 pm-5:44 pm
1 stop5h 29m
Washington, D.C. Dulles Intl
Mon 11/9
11:20 am-4:37 pm
1 stop5h 17m
OttawaWashington, D.C.
YOW Ottawa - IAD Washington, D.C. Dulles Intl
YOWIAD
Ottawa
Mon 11/2
12:15 pm-5:44 pm
1 stop5h 29m
Washington, D.C. Dulles Intl
Mon 11/9
11:20 am-4:37 pm
1 stop5h 17m
OttawaWashington, D.C.
YOW Ottawa - IAD Washington, D.C. Dulles Intl
YOWIAD
Ottawa
Sun 11/22
6:00 am-7:20 am
1 stop25h 20m
Washington, D.C. Dulles Intl
Mon 11/23
1:19 pm-3:07 pm
Nonstop1h 48m
OttawaWashington, D.C.
YOW Ottawa - IAD Washington, D.C. Dulles Intl
YOWIAD
Ottawa
Sun 11/22
12:15 pm-5:43 pm
1 stop5h 28m
Washington, D.C. Dulles Intl
Mon 11/23
11:20 am-4:09 pm
1 stop4h 49m
OttawaWashington, D.C.
YOW Ottawa - DCA Washington, D.C. Reagan-National
YOWDCA
Ottawa
Sun 11/22
5:40 pm-9:59 pm
1 stop4h 19m
Washington, D.C. Reagan-National
Mon 11/23
11:05 am-3:57 pm
1 stop4h 52m
OttawaWashington, D.C.
YOW Ottawa - DCA Washington, D.C. Reagan-National
YOWDCA
Ottawa
Mon 11/9
5:40 pm-9:59 pm
1 stop4h 19m
Washington, D.C. Reagan-National
Wed 11/11
4:05 pm-10:32 pm
1 stop6h 27m
OttawaWashington, D.C.
YOW Ottawa - DCA Washington, D.C. Reagan-National
YOWDCA
Ottawa
Mon 11/9
5:40 pm-9:59 pm
1 stop4h 19m
Washington, D.C. Reagan-National
Thu 11/12
6:00 am-11:37 am
1 stop5h 37m
OttawaWashington, D.C.
YOW Ottawa - IAD Washington, D.C. Dulles Intl
YOWIAD
Ottawa
Sat 11/28
2:00 pm-3:53 pm
Nonstop1h 53m
Washington, D.C. Dulles Intl
Mon 11/30
5:37 pm-7:27 pm
Nonstop1h 50m
OttawaWashington, D.C.
YOW Ottawa - IAD Washington, D.C. Dulles Intl
YOWIAD
Ottawa
Fri 10/30
2:00 pm-3:53 pm
Nonstop1h 53m
Washington, D.C. Dulles Intl
Sun 11/8
1:19 pm-3:07 pm
Nonstop1h 48m
See travel insights to Washington, D.C. from
How to get the cheapest flight ticket from Ottawa to Washington, D.C.
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 typical price of a round-trip flight between Ottawa and Washington, D.C.?
Prices are currently low for flights on this route.
Typical prices usually range from $348 to $428.The lowest price recently found on this route was $307.
What is the cheapest month to fly to Washington, D.C.?
The month of January is, on average, the cheapest month to fly to Washington, D.C. from Ottawa, with most prices found around $332. If you’re not able to fly to Washington, D.C. in January, then October is your next best option. Flight prices from Ottawa to Washington, D.C. during October average around $358.
What is the cheapest day to depart on your flight to Washington, D.C.?
On average, the least expensive day to fly to Washington, D.C. from Ottawa is on a Thursday. momondo users have found tickets for Thursday departures for as low as $532. However, this price may fluctuate depending on the airline, the season, and holidays. 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. for around $698.
What is the cheapest time of day to depart on your flight to Washington, D.C.?
In the morning is the cheapest time of day to fly from Ottawa to Washington, D.C. when you can find flight prices for as low as $510. Flying to Washington, D.C. in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $780. Of course, these prices can vary depending on the time of year and what airport you fly to.
What is the cheapest Ottawa to Washington, D.C. flight route?
Fly from Ottawa to Washington, D.C. Reagan-National for the best Ottawa - Washington, D.C. flight prices
What cabin class options are available on Ottawa to Washington, D.C. flights?
There are 4 cabin classes available to choose from on Ottawa to Washington, D.C. 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. flights?
No. A direct flight is the cheapest option for a flight between Ottawa to Washington, D.C..
What is the cheapest airline that flies from Ottawa to Washington, D.C.?
Air Canada, United Airlines, and American Airlines are the most popular carriers operating from Ottawa to Washington, D.C.
What airlines fly to Washington, D.C.?
Air Canada, United Airlines and Delta are the top three most popular airlines that fly to Washington, D.C. from Ottawa according to our data. Air Canada is the first choice among our users, with 75% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 4 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ottawa to Washington, D.C. on average per day?
The number of flights available between Ottawa and Washington, D.C. is 9 per day as of October 2026. The most frequent departure time is 10:00AM, with 53% of daily flights leaving at noon.
How many flights depart from Ottawa to Washington, D.C. on average per week?
The number of flights available between Ottawa and Washington, D.C. is 67 per week as of October 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.
When to book flights from Ottawa to Washington, D.C.
Cheap Ottawa to Washington, D.C. (YOW to WAS) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ottawa to Washington, D.C.
Frequently asked questions about flying from Ottawa to Washington, D.C.
How far is Ottawa to Washington, D.C. by plane?
The distance between Ottawa and Washington, D.C. is about 454.6 mi. In terms of flight time, this usually takes a little over 1h 34m.
When did momondo last update prices for flights from Ottawa Airport to Washington, D.C.?
Prices for flights from Ottawa Airport to Washington, D.C. are refreshed on a daily basis.
How many operators does momondo search for flights from Ottawa Airport to Washington, D.C.?
As of October 2026, there are 2 operators available to choose from for flights from Ottawa Airport to Washington, D.C..
How old do you have to be to fly from Ottawa Airport to Washington, D.C.?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ottawa Airport to Washington, D.C..
What documentation or ID do you need to fly to Washington, D.C.?
The travel and health documents you'll need for your trip to Washington, D.C. may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C.. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Ottawa to Washington, D.C.?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Ottawa to Washington, D.C. is Embraer 175 (Enhanced Winglets) (33.69% of total bookings). The next most popular plane models are Canadair (Bombardier) Regional Jet CRJ-550 (30.36%), Canadair (Bombardier) Regional Jet 900 (13.18%), and Embraer 195 E2 (7.06%).
What is the most popular airline from Ottawa to Washington, D.C.?
momondo data reveals that the most frequently booked airline on the route from Ottawa to Washington, D.C. is Air Canada, representing 76% of all bookings. The subsequent popular airline is United Airlines at 24%.
Best airlines flying from Ottawa to Washington, D.C.
Compare and see reviews for airlines that fly from Ottawa to Washington, D.C. with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $295 | Free Cancellation | Rating 7.1 11,728 reviews | |||
| PriceFrom $324 | Free Cancellation | Rating 7.4 10,296 reviews |
United Airlines Flights From Ottawa to Washington, D.C.
Across 31 United Airlines flights from Ottawa to Washington, D.C. this week, the average price was $411, with the best United Airlines deals starting from $324 round-trip. 10,298 users have rated United Airlines on momondo, with an average score of 7.4/10.
Air Canada Flights From Ottawa to Washington, D.C.
$295 is the best Air Canada flight deal from Ottawa to Washington, D.C. found on momondo over the last 72 hours. The average Air Canada ticket price found was closer to $401, however, with flight time and availability significantly affecting the price. Air Canada (7.1/10 from 11,728 user reviews) flies into Washington, D.C. from Ottawa 34 times in an average week so prices can vary.
Traveling to a place near Washington, D.C.?
Book flights to Washington, D.C. if you plan to visit one of these locationsWhy 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?
Flights from Ottawa to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Ottawa to Washington, D.C.?
Once you have performed a search for Ottawa to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
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 not ready to book a flight from Ottawa to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.