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Cheap flights from Washington Dulles Intl to Ontario (IAD - ONT)

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The best prices from Washington Dulles Intl to Ontario are usually found in August or September, booked 34 days in advance, depart on a Wednesday or Monday and return on a Friday

How to find the cheapest flight from
Washington Dulles Intl (IAD) to Ontario (ONT)

IAD - ONT
Price
$202 - $594

Popular in

December

High demand for flights, 49% potential price rise

Cheapest in

August

Best time to find cheap flights, 33% potential price drop

Round-trip from

$202

From Washington Dulles Intl to Ontario

One-way from

$50

One-way flight from Washington Dulles Intl to Ontario

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Washington Dulles Intl to Ontario?

Leaving on a Tuesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 111% on the overall cost on flights from Washington Dulles Intl to Ontario.

How far in advance should I book a flight from Washington Dulles Intl to Ontario?

To save up to 20% on this flight, we recommend booking at least 17 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Washington Dulles Intl to Ontario from $75 1-2 weeks out and tickets from $95 for flights departing within the next 72 hours.

What is the cheapest month to fly from Washington Dulles Intl to Ontario?

April can be a great time to fly to Ontario from Washington Dulles Intl with a flight ticket averaging about $86. Cheapflights users have found deals in the month of April for as cheap as $43. The most expensive prices can be found in the month of December.

When is the cheapest time to fly from Washington Dulles Intl to Ontario (IAD - ONT)?

It’s optimal to fly from Washington Dulles Intl to Ontario at noon. By choosing this option you can save up to 50% on the cost of your flight, compared to a flight in the afternoon.

Cheap flights from Washington Dulles Intl to Ontario in January, February 2021

The best prices found for IAD to ONT flights for January, February
18 Feb - 22 Feb
$134pp
IAD
Washington Dulles Intl
Frontier
 
1 STOP
ONT
Ontario
ONT
Ontario
Frontier
 
1 STOP
IAD
Washington Dulles Intl
18 Feb - 21 Feb
$173pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
Multiple Airlines
     
3 STOPS
IAD
Washington Dulles Intl
25 Feb - 28 Feb
$175pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
Multiple Airlines
     
3 STOPS
IAD
Washington Dulles Intl

Washington Dulles Intl to Ontario 2021 flight deals

Cheap flights to Ontario from Washington Dulles Intl found for this year
18 Feb - 22 Feb
$134pp
IAD
Washington Dulles Intl
Frontier
 
1 STOP
ONT
Ontario
ONT
Ontario
Frontier
 
1 STOP
IAD
Washington Dulles Intl
18 Feb - 21 Feb
$173pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
Multiple Airlines
     
3 STOPS
IAD
Washington Dulles Intl
25 Feb - 28 Feb
$175pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
Multiple Airlines
     
3 STOPS
IAD
Washington Dulles Intl

Last minute flights from Washington Dulles Intl to Ontario

Late deals on round-trip flights to Ontario from Washington Dulles Intl, departing today and this week
30 Jan - 1 Feb
$368pp
IAD
Washington Dulles Intl
Delta
 
1 STOP
ONT
Ontario
ONT
Ontario
Delta
 
1 STOP
IAD
Washington Dulles Intl
30 Jan - 1 Feb
$372pp
IAD
Washington Dulles Intl
Delta
   
2 STOPS
ONT
Ontario
ONT
Ontario
Delta
 
1 STOP
IAD
Washington Dulles Intl
30 Jan - 1 Feb
$376pp
IAD
Washington Dulles Intl
Delta
   
2 STOPS
ONT
Ontario
ONT
Ontario
Delta
   
2 STOPS
IAD
Washington Dulles Intl

One-way flights to Ontario from Washington Dulles Intl

The cheapest one-way flights from Washington Dulles Intl to Ontario
3:59 am - 3:33 pm
Frontier
1 Stop
14h 34m
IAD - ONT
Frontier
7:00 am - 5:42 pm
American Airlines
3 Stops
13h 42m
IAD - ONT
American Airlines
4:30 am - 5:32 pm
Delta
3 Stops
16h 02m
IAD - ONT
Delta
$447
Delta

Related info for your journey

Useful info, stats and facts about Washington Dulles Intl to Ontario flights.

Flight FAQs

From Washington Dulles Intl to Ontario

Are flight prices decreasing from Washington Dulles Intl to Ontario due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Washington Dulles Intl and Ontario for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Washington Dulles Intl to Ontario to control the spread of COVID-19?

New policies can now be found on Alaska Airlines and Delta to help keep travelers safe while flying. Some of the new policies that have been implemented to accommodate travelers flying from Washington Dulles Intl to Ontario are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

Which airlines flying from Washington Dulles Intl to Ontario have flexible cancellations due to COVID-19?

Frontier, United Airlines, and American Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from Washington Dulles Intl to Ontario for under $200 on Cheapflights?

Yes, there are multiple flights from Washington Dulles Intl to Ontario for under $200. The cheapest flight booked recently is on Frontier for just $134, but on average you can expect to pay $242.

Are there nonstop flights from Washington Dulles Intl to Ontario for under $100 on Cheapflights?

There are no nonstop flights from Washington Dulles Intl to Ontario, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from Washington Dulles Intl to Ontario for under $400?

There are currently 10+ open flights from Washington Dulles Intl to Ontario within the next 7 days for less than $400.

What days are nonstop flights available from Washington Dulles Intl to Ontario?

You can find nonstop flights on the following days: Saturday.

Does it rain more in Washington Dulles Intl or Ontario?

When traveling, we recommend packing in preparation to handle common weather conditions. The rainfall in Washington Dulles Intl is typically greater than that of Ontario. We can gather that this will continue over the next 15 days.

Is Washington Dulles Intl weather warmer or cooler than Ontario?

You can imagine temperatures to be in the 95 °F range in July. The weather in Ontario is generally hotter than Washington Dulles Intl's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.

How long is the flight from Washington Dulles Intl to Ontario?

There are many flights that can get you from Washington Dulles Intl to Ontario in 7h. Fly via American Airlines, Delta, or United Airlines to get the fastest option. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from Washington Dulles Intl to Ontario round-trip?

Frontier, at $134, was found to be the cheapest airline from Washington Dulles Intl to Ontario.Alternate airlines to your destination round-trip include Delta and American Airlines. Users have found that Frontier is 55% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Washington Dulles Intl to Ontario one-way?

$50 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and American Airlines, with prices starting from $133 and $136, respectively.

Destination information for Ontario

Things to know before you go. Useful info for your trip from Washington Dulles Intl to Ontario

Airports servicing Washington

Airports servicing Ontario

Top 4 airlines flying from Washington Dulles Intl to Ontario

The chart below displays the airlines Cheapflights users traveling from Washington Dulles Intl to Ontario choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$106 $236 No cancel fee 62%
Delta
$157 $352 No cancel fee N/A
United Airlines
$149 $452 No cancel fee 69%
American Airlines
$209 $514 No cancel fee 71%
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