£171 Find Cheap Flights from Washington, D.C. to Ottawa – Compare and Save

Among airlines operating Washington, D.C. Dulles Intl Airport to Ottawa flights:

• United Airlines: offers extra legroom; offers free seat selection
• Air Canada: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Only United Airlines operates flights between Washington, D.C. Dulles Intl Airport and Ottawa.

Flights from Washington, D.C. Dulles Intl Airport to Ottawa usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Ottawa (YOW).

Here are some options for this route, based on selected ticket types and cabin classes:

• United Airlines: a cabin bag and a checked bag in Economy class
• Air Canada: a cabin bag and a checked bag in Economy class
• Avianca: a cabin bag in Economy class class

Bag allowance can vary by ticket type, cabin class, route, and airline, so travellers should check the fare details before booking.

Two cabin classes are available on flights from Washington, D.C. Dulles Intl Airport to Ottawa:

• Economy class
• Business Class

On this route, stopover flights are cheaper than direct options on average. Stopover fares average £263 return via Orlando (MCO), compared with £398 for direct.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £30–£51 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

The Embraer 175 (Enhanced Winglets) family is used most often on this route, operated mainly by United Airlines and Air Canada. Other aircraft seen on the route include Canadair (Bombardier) Regional Jet CRJ-550 variants.

Connecting flights from Washington, D.C. Dulles Intl Airport to Ottawa most commonly pass through:

• Toronto Island (YTZ) – 99% of one-stop connections
• Orlando (MCO) – 1% of one-stop connections
Together, these airports account for 100% of one-stop bookings on this route.

Yes. Being flexible with your travel dates can save you up to 23% on the Washington, D.C. Dulles Intl Airport to Ottawa route. Thursday is the cheapest departure day at £353 return on average, while Monday is the most expensive at £456, a difference of £103. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Afternoon is the busiest departure period on Washington, D.C. Dulles Intl Airport to Ottawa flights, with 50% leaving in that window. Evening departures account for 50%, Morning flights for 0%, and Night flights for 0%.

These are the earliest and latest flight times available from Washington, D.C. Dulles Intl Airport to Ottawa:

• Earliest: departs at 08:15 and lands at 10:00
• Latest: departs at 22:10 and lands at 23:55.

The flight takes about 1h 45m.

Last-minute fares on this route (booked within 2 weeks of departure) run 70% above the route average of £379. Book 15 weeks before departure for the lowest fares.

A direct flight from Washington, D.C. Dulles Intl Airport to Ottawa takes 1h 45m, covering 449 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about £332 to £931. That means the highest observed fare was about 3x higher than the lowest one.

One-way fares from Washington, D.C. Dulles Intl Airport to Ottawa are currently higher than usual. Average one-way flight prices are about £233, which is 11% above the typical average for this route.

Flying via Toronto Island (YTZ) gives the shortest average 1-stop total travel time of 4h 13m, compared to 16h 01m via Orlando (MCO).

Ottawa Airport (YOW) hosts 5 major car hire companies, with daily rates starting from around £9 for economy cars. Top options include:
• Routes Car & Truck Rentals
• Europcar
• Alamo
• Budget
• Enterprise Rent-A-Car

Return flights from Washington, D.C. Dulles Intl Airport to Ottawa range from £310 to £458, with an average of £379 over the past 12 months. Anything below £310 counts as a good deal.