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

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

All the information you need to plan the best IAD to ONT flight in 2022: compare Dulles Intl to Ontario flight prices with the expected peak season, weather and rainfall in Ontario.
IAD - ONT
Price
$202 - $594
ONT
Temperature
53.6 - 78.8 °F
ONT
Precipitation
0.1 - 3.4 inches

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

$156

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 month to fly from Washington Dulles Intl Airport to Ontario?

August can be a great time to fly to Ontario from Washington Dulles Intl Airport with a flight ticket averaging about $280. Cheapflights users have found deals in the month of August for as cheap as $114. The most expensive prices can be found in the month of December.

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

To save on the cost of your flight from Washington Dulles Intl Airport to Ontario, book at least 24 days before your planned departure. Booking around this time can save you about 22% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $272 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $332.

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

When flying from Washington Dulles Intl Airport to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap flights from Dulles Intl to Ontario in January, February 2022

The best prices found for IAD to ONT flights for January, February
26 Feb - 6 Mar
$259pp
IAD
Washington Dulles Intl
United Airlines
   
2 STOPS
ONT
Ontario
ONT
Ontario
United Airlines
   
2 STOPS
IAD
Washington Dulles Intl
25 Feb - 5 Mar
$269pp
IAD
Washington Dulles Intl
United Airlines
   
2 STOPS
ONT
Ontario
ONT
Ontario
United Airlines
   
2 STOPS
IAD
Washington Dulles Intl
25 Feb - 5 Mar
$281pp
IAD
Washington Dulles Intl
United Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
United Airlines
   
2 STOPS
IAD
Washington Dulles Intl

Washington Dulles Intl to Ontario 2022 flight deals

Cheap flights to Ontario from Dulles Intl found for this year
3 Mar - 8 Mar
$259pp
IAD
Washington Dulles Intl
United Airlines
   
2 STOPS
ONT
Ontario
ONT
Ontario
United Airlines
   
2 STOPS
IAD
Washington Dulles Intl
25 Feb - 5 Mar
$269pp
IAD
Washington Dulles Intl
United Airlines
   
2 STOPS
ONT
Ontario
ONT
Ontario
United Airlines
   
2 STOPS
IAD
Washington Dulles Intl
1 Mar - 1 Mar
$273pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
United Airlines
   
2 STOPS
IAD
Washington Dulles Intl

Last minute flights from Dulles Intl to Ontario

Late deals on round-trip flights to Ontario from Dulles Intl, departing today and this week
5 Feb - 15 Feb
$391pp
IAD
Washington Dulles Intl
United Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
United Airlines
 
1 STOP
IAD
Washington Dulles Intl
4 Feb - 7 Feb
$394pp
IAD
Washington Dulles Intl
United Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
United Airlines
 
1 STOP
IAD
Washington Dulles Intl
2 Feb - 7 Feb
$398pp
IAD
Washington Dulles Intl
United Airlines
   
2 STOPS
ONT
Ontario
ONT
Ontario
United Airlines
 
1 STOP
IAD
Washington Dulles Intl

One-way flights to Ontario from Washington Dulles Intl

The cheapest one-way flights from Dulles Intl to Ontario
2:00 am - 4:51 pm
Multiple Airlines
2 Stops
17h 51m
IAD - ONT
Multiple Airlines
$156
Kiwi.com
1:00 am - 11:30 am
Delta
2 Stops
13h 30m
IAD - ONT
Delta
$174
Delta
1:40 am - 7:35 pm
Avianca
1 Stop
20h 55m
IAD - ONT
Avianca
$180
Gotogate

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Dulles Intl</span> to <span class="emphasized">Ontario</span> flights.

Flight FAQs

From Dulles Intl to Ontario

What airport do you fly into for flights to Ontario from Washington Dulles Intl?

Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from Washington Dulles Intl to Ontario. 6 airlines have flights to Ontario from Washington Dulles Intl on a regular basis. Booking flights from Washington Dulles Intl to Ontario should not be difficult; the airport handles an average of 0 inbound flights from Washington Dulles Intl per day.

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 Airport to Ontario for under $300 on Cheapflights?

Yes, there are multiple flights from Washington Dulles Intl Airport to Ontario for under $300. The cheapest flight booked recently is on United Airlines for just $259, but on average you can expect to pay $299.

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

There are currently 20+ open flights from Washington Dulles Intl Airport to Ontario within the next 7 days for less than $400.

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

United Airlines, at $259, was found to be the cheapest airline from Washington Dulles Intl Airport to Ontario.Alternate airlines to your destination round-trip include American Airlines and Alaska Airlines. These flights start at 13% lower than the current average price 3 months from now.

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

To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $135. Delta flights start at $138 while deals on American Airlines start at $148 one-way.

What are the most popular airlines that fly from Washington Dulles Intl Airport to Ontario?

American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from Washington Dulles Intl Airport to Ontario.

What are the cheapest flights from Washington Dulles Intl Airport to Ontario?

On average you can expect to pay $495 for a flight from Washington Dulles Intl Airport to Ontario. The cheapest flight overall is $102 while the most popular route, (Washington Dulles Intl - Ontario) is currently priced at $273.

COVID Restrictions

View COVID Travel Restrictions for Ontario, CA

Do I need a COVID test to fly to Ontario from Dulles Intl?

Information is based on travel restrictions for travel to Ontario within the United States

Most visitors from Washington Dulles Intl need to provide a negative COVID-19 test result and/or quarantine to enter Ontario.

COVID-19 testing requirements
Visitors from Washington Dulles Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Ontario.

Quarantine requirements
Visitors from Washington Dulles Intl are not required to quarantine after entering Ontario.

Do I need a test to fly back to Dulles Intl from Ontario?

Returning to Washington Dulles Intl from Ontario

COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Washington Dulles Intl.

Quarantine requirements
Visitors from Ontario are not required to quarantine after entering Washington Dulles Intl.

Hide COVID Travel Restrictions for Ontario, CA

Destination information for Ontario

Things to know before you go - useful duration and weather info for your trip from 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 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%
United Airlines
$149 $452 No cancel fee 69%
Delta
$157 $352 No cancel fee N/A
American Airlines
$209 $514 No cancel fee 71%
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