Cheap flights from Washington, D.C. to Ontario from $87
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Ontario departing on 5/14. 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.
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.Find the cheapest flights from Washington, D.C. to Los Angeles
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Alaska Airlines flights from Washington, D.C. to Ontario
Our best Alaska Airlines deals on Washington, D.C. to Ontario flight tickets
American Airlines flights from Washington, D.C. to Ontario
Our best American Airlines deals on Washington, D.C. to Ontario flight tickets
See travel insights to Los Angeles from
How to get the cheapest flight ticket from Washington, D.C. to Ontario
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 Washington, D.C. and Ontario?
What is the cheapest month to fly to Ontario?
In general, August is the cheapest month to fly from Washington, D.C. to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $298. If you aren’t able to travel during the month of August, then book flights to Ontario from Washington, D.C. during October instead. Flights to Ontario in October, while not as cheap as those in August, still average around $317.
What is the cheapest day to depart on your flight to Ontario?
The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $323. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to Ontario for around $480.
What is the cheapest time of day to depart on your flight to Ontario?
In the afternoon is the cheapest time of day to fly from Washington, D.C. to Ontario when you can find flight prices for as low as $366. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $431 on average. Flights to Ontario from Washington, D.C. in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.
What is the cheapest Washington, D.C. to Ontario flight route?
Fly from Baltimore/Washington to Ontario for the best Washington, D.C. - Ontario flight prices
How far in advance should I book a flight to Ontario?
You are more likely to see cheaper flights to Ontario from Washington, D.C. when booking 9 weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $464 when searching 9 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Washington, D.C. for as low as $336 on momondo.
What cabin class options are available on Washington, D.C. to Ontario flights?
There are 1 cabin classes available to choose from on Washington, D.C. to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Washington, D.C. to Ontario?
Frontier, Alaska Airlines, and Hawaiian Airlines are the most popular carriers operating from Washington, D.C. to Ontario
What airlines fly to Ontario?
United Airlines, Spirit Airlines and American Airlines are the top three most popular airlines that fly to Ontario from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 11 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.
When to book flights from Washington, D.C. to Ontario
Cheap Washington, D.C. to Ontario (WAS to ONT) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Ontario
Best Price Found | $87 |
|---|---|
Fastest flight time | 5h 20m |
Direct flights | Mon, Wed, Thu, Fri, Sat and Sun |
Airports in Ontario | 1 airport |
How far is Washington, D.C. to Ontario by plane?
A flight from Washington, D.C. to Ontario will travel around 2260.6 mi. Flights usually cover this in 5h 20m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Washington, D.C. to Ontario Airport?
Prices for flights from Washington, D.C. to Ontario Airport were last updated today.
How many operators does momondo search for flights from Washington, D.C. to Ontario Airport?
There are 5 operators available for flights from Washington, D.C. to Ontario Airport as of April 2025.
How old do you have to be to fly from Washington, D.C. to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario 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 Ontario 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 Washington, D.C. to Ontario?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. to Ontario is Boeing 737-800 Passenger/BBJ2 (winglets) (41.67% of total bookings). The next most popular plane models are Airbus A320neo (25.00%), Boeing 737 MAX 8 (16.67%), and Boeing 737-900 Passenger/BBJ3 (winglets) (16.67%).
What is the most popular airline from Washington, D.C. to Ontario?
Based on momondo bookings for flights between Washington, D.C. and Ontario, the leading airline is Frontier, making up 33% of the total bookings. Other popular airlines include American Airlines with 23%, Southwest with 14%, and Delta with 14%.
Best airlines flying from Washington, D.C. to Ontario
Compare and see reviews for airlines that fly from Washington, D.C. to Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $150 | Free Cancellation | Rating 6.0 3,281 reviews | |||
| PriceFrom $195 | Free Cancellation | Rating 7.4 8,667 reviews | |||
| PriceFrom $286 | Free Cancellation | Rating 8.0 7,917 reviews | |||
| PriceFrom $286 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $327 | Free Cancellation | Rating 8.0 4,280 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Washington, D.C. to Ontario?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Washington, D.C..
Can I find flights from Washington, D.C. to Ontario with flexible booking policies on momondo?
momondo does allow users to show only those flights to Ontario from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Washington, D.C. to Ontario?
Once you have performed a search for Washington, D.C. to Ontario 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 Washington, D.C. to Ontario right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Washington, D.C. to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.