$117+ Cheap flights from District of Columbia to Ontario (ONT)
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 4/30. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from District of Columbia to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from District of Columbia to Ontario
Keep the following information in mind while searching for District of Columbia to Ontario flight deals. Data was last updated March 28, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $235 (Cheapflightsfares) |
One-way from | $117 (Flightnetwork) |
Popular in | December |
Cheapest in | September |
Average price | $406 |
Find flight deals from District of Columbia to Ontario
Cheapest flights from District of Columbia to OntarioExplore the most affordable flight options available from District of Columbia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.
Explore the most affordable flight options available from District of Columbia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.
This Cheapflightsfares deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Alaska Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from District of Columbia to Ontario 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 2,558,603 searches. Data last updated March 28, 2025.
Use the filters below to find and compare flights from District of Columbia to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Ontario
DCA - ONT
DCAONT
Washington, D.C. Reagan-National
Wed 4/23
7:00 am-11:20 am
1 stop7h 20m
Ontario
Fri 4/25
12:11 pm-9:59 pm
1 stop6h 48m
Washington, D.C.Ontario
IAD - ONT
IADONT
Washington, D.C. Dulles Intl
Fri 5/2
8:01 am-1:16 pm
1 stop8h 15m
Ontario
Fri 5/9
2:28 pm-6:31 am
1 stop13h 03m
Washington, D.C.Ontario
IAD - ONT
IADONT
Washington, D.C. Dulles Intl
Wed 4/23
6:30 am-3:32 pm
1 stop12h 02m
Ontario
Sat 4/26
6:00 am-8:43 pm
1 stop11h 43m
Washington, D.C.Ontario
IAD - ONT
IADONT
Washington, D.C. Dulles Intl
Sat 4/26
6:30 am-3:32 pm
1 stop12h 02m
Ontario
Sat 5/3
6:00 am-8:43 pm
1 stop11h 43m
Washington, D.C.Ontario
DCA - ONT
DCAONT
Washington, D.C. Reagan-National
Sat 4/26
6:00 am-10:57 am
1 stop7h 57m
Ontario
Sat 5/3
12:07 pm-10:38 pm
1 stop7h 31m
Washington, D.C.Ontario
IAD - ONT
IADONT
Washington, D.C. Dulles Intl
Sat 4/26
6:00 am-10:57 am
1 stop7h 57m
Ontario
Sat 5/3
10:15 pm-9:20 am
1 stop8h 05m
Washington, D.C.Ontario
DCA - ONT
DCAONT
Washington, D.C. Reagan-National
Wed 6/11
6:49 am-1:50 pm
1 stop10h 01m
Ontario
Wed 6/25
7:05 pm-7:00 am
1 stop8h 55m
Washington, D.C.Ontario
IAD - ONT
IADONT
Washington, D.C. Dulles Intl
Tue 4/22
9:10 am-6:29 pm
2 stops12h 19m
Ontario
Sat 4/26
6:15 am-10:42 pm
2 stops13h 27m
Washington, D.C.Ontario
DCA - ONT
DCAONT
Washington, D.C. Reagan-National
Thu 5/1
7:25 am-3:09 pm
2 stops10h 44m
Ontario
Sat 5/3
6:00 am-4:57 pm
1 stop7h 57m
Washington, D.C.Ontario
DCA - ONT
DCAONT
Washington, D.C. Reagan-National
Fri 4/18
4:20 pm-11:00 pm
2 stops9h 40m
Ontario
Fri 4/25
5:45 am-6:05 pm
2 stops9h 20m
Best time to book a flight from District of Columbia to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from District of Columbia with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from District of Columbia to Ontario
What is the cheapest month to book a flight from District of Columbia to Ontario?
Currently, August is the cheapest month in which you can book a flight from District of Columbia to Ontario (average of $246). Flying from District of Columbia to Ontario in March is currently the most expensive (average of $326). 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 DC to ONT?
Find hourly flight availability from District of Columbia to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from District of Columbia to Ontario as you normally would.
Rainfall in Ontario by month
Plan your trip to Ontario by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.
Temperature in Ontario by month
Plan your trip to Ontario by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated March 28, 2025.
Get a feel of what it's like to fly with Southwest, Alaska Airlines and Delta from District of Columbia to Ontario by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
Boarding
Food
Entertainment
Comfort
Overall
Reviews
Merlyn,Feb 2025
LAX - SMF
Crew
Boarding
Food
Entertainment
Comfort
Overall
Reviews
Merlyn,Feb 2025
LAX - SMF
Crew
Boarding
Food
Entertainment
Comfort
Overall
Reviews
Merlyn,Feb 2025
LAX - SMF
Crew
Boarding
Food
Entertainment
Comfort
Overall
Reviews
Merlyn,Feb 2025
LAX - SMF
Crew
Boarding
Food
Entertainment
Comfort
Overall
Reviews
Merlyn,Feb 2025
LAX - SMF
Crew
Boarding
Food
Entertainment
Comfort
Overall
Reviews
Merlyn,Feb 2025
LAX - SMF
Related info for your journey
Find useful and relevant information for your journey from District of Columbia to Ontario. 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 District of Columbia to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from District of Columbia to Ontario
Discover the top 5 airlines that operate flights from District of Columbia to Ontario. 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 2,558,603 searches. Data last updated March 28, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$150 | Average$258 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$195 | Average$485 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$286 | Average$441 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$286 | Average$475 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$326 | Average$528 | FlexibilityNo cancel fee | On-time63% |