Cheap flights from Ottawa to Washington, D.C. from C$ 192
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from Ottawa to Washington, D.C. are usually found in March or April, booked 58 days in advance, depart on a Friday or Tuesday and return on a Tuesday
Cheap flight deals from Ottawa to Washington, D.C.
Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 June 2025.
Find flight deals from Ottawa to Washington, D.C.
Cheapest flights from Ottawa to Washington, D.C.Explore the most affordable flight options available from Ottawa to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 June 2025.
Explore the most affordable flight options available from Ottawa to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 June 2025.
Cheapflights Fare Finder
Customize your flight search to find flights from Ottawa to Washington, D.C. 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, Cheapflights users made 629,999 searches. Data last updated 18 June 2025.
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
Price
OttawaWashington, D.C.
YOW - IAD
YOWIAD
Ottawa
Thu 10/7
9:50 a.m.-11:29 a.m.
Nonstop1h 39m
Washington, D.C. Dulles Intl
Mon 14/7
5:25 p.m.-10:05 p.m.
1 stop4h 40m
OttawaWashington, D.C.
YOW - DCA
YOWDCA
Ottawa
Fri 11/7
5:15 a.m.-8:57 a.m.
1 stop3h 42m
Washington, D.C. Reagan-National
Mon 14/7
6:00 a.m.-10:19 a.m.
1 stop4h 19m
OttawaWashington, D.C.
YOW - IAD
YOWIAD
Ottawa
Fri 1/8
8:35 a.m.-2:56 p.m.
1 stop6h 21m
Washington, D.C. Dulles Intl
Fri 8/8
11:35 a.m.-4:33 p.m.
1 stop4h 58m
OttawaWashington, D.C.
YOW - IAD
YOWIAD
Ottawa
Thu 10/7
9:50 a.m.-11:29 a.m.
Nonstop1h 39m
Washington, D.C. Dulles Intl
Sun 13/7
4:10 p.m.-7:38 p.m.
1 stop3h 28m
OttawaWashington, D.C.
YOW - IAD
YOWIAD
Ottawa
Tue 21/10
7:29 p.m.-9:12 p.m.
Nonstop1h 43m
Washington, D.C. Dulles Intl
Sat 25/10
9:35 a.m.-1:51 p.m.
1 stop4h 16m
OttawaBaltimore
YOW - BWI
YOWBWI
Ottawa
Tue 15/7
7:00 a.m.-5:32 p.m.
2 stops10h 32m
Baltimore/Washington
Tue 22/7
5:45 a.m.-5:06 p.m.
1 stop11h 21m
OttawaWashington, D.C.
YOW - DCA
YOWDCA
Ottawa
Mon 30/6
6:33 a.m.-2:13 p.m.
1 stop7h 40m
Washington, D.C. Reagan-National
Tue 1/7
7:25 a.m.-5:06 p.m.
1 stop9h 41m
OttawaWashington, D.C.
YOW - IAD
YOWIAD
Ottawa
Fri 19/9
6:00 a.m.-5:50 p.m.
1 stop11h 50m
Washington, D.C. Dulles Intl
Mon 22/9
6:45 p.m.-4:19 p.m.
2 stops21h 34m
OttawaWashington, D.C.
YOW - DCA
YOWDCA
Ottawa
Sat 2/8
5:55 a.m.-6:02 p.m.
1 stop12h 07m
Washington, D.C. Reagan-National
Sat 9/8
6:00 a.m.-12:22 a.m.
2 stops18h 22m
OttawaBaltimore
YOW - BWI
YOWBWI
Ottawa
Sat 30/8
6:33 a.m.-1:48 p.m.
1 stop7h 15m
Baltimore/Washington
Wed 3/9
6:15 a.m.-9:35 p.m.
1 stop15h 20m
Best time to book a flight from Ottawa to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Ottawa with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Ottawa to Washington, D.C.
How far ahead should I book a flight from Ottawa to Washington, D.C.?
Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Washington, D.C.. Price data was last updated on 13 June 2025.
To ensure you get the cheapest price possible for a flight from Ottawa to Washington, D.C., you should look to book at least 58 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Ottawa to Washington, D.C.?
Currently, February is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 256). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of C$ 352). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from YOW to WAS?
Find hourly flight availability from Ottawa to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 June 2025.
It’s typically best to fly out from Ottawa to Washington, D.C. in the afternoon. Doing so could potentially save you 60% on the flight price compared to flying at noon, which is usually more expensive.
What is the cheapest day to fly from Ottawa to Washington, D.C.?
Use this chart to determine the cheapest time to fly round-trip from Ottawa to Washington, D.C.. Price data was last updated on 16 December 2024.
Travelers seeking maximum savings on their Ottawa to Washington, D.C. flight should consider departing on Saturday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Ottawa to Washington, D.C.
Explore weekly flight availability from Ottawa to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 18 June 2025.
The most flights from YOW to WAS are scheduled on a Monday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 on average).
Rainfall in Washington, D.C. by month
Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 mm per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.
Temperature in Washington, D.C. by month
Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).
Reviews of airlines servicing Washington, D.C.
Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated 18 June 2025.
See what other customers who have flown with Porter Airlines, Delta and United Airlines from Ottawa to Washington, D.C. have to say. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Crew
Entertainment
Comfort
Boarding
Overall
Reviews
Mary,Jun 2025
FLL - YYZ
Food
Crew
Entertainment
Comfort
Boarding
Overall
Reviews
Mary,Jun 2025
FLL - YYZ
Food
Crew
Entertainment
Comfort
Boarding
Overall
Reviews
Mary,Jun 2025
FLL - YYZ
Food
Crew
Entertainment
Comfort
Boarding
Overall
Reviews
Mary,Jun 2025
FLL - YYZ
Food
Crew
Entertainment
Comfort
Boarding
Overall
Reviews
Mary,Jun 2025
FLL - YYZ
Food
Crew
Entertainment
Comfort
Boarding
Overall
Reviews
Mary,Jun 2025
FLL - YYZ
Related info for your journey
Find useful and relevant information for your journey from Ottawa to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Ottawa to Washington, D.C.
See prices for flight routes from nearby airports that may be better suited for you.
Top 3 airlines flying from Ottawa to Washington, D.C.
Discover the top 3 airlines that operate flights from Ottawa to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 18 June 2025.
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How does Cheapflights help users find flights from Ottawa to Washington, D.C.?
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Why should you use Cheapflights to find cheap flight tickets from Ottawa to Washington, D.C.?
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Can Cheapflights find flights from Ottawa to Washington, D.C. with no change fees?
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