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

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

All the information you need to plan the best ONT to IAD flight in 2022: compare Ontario to Dulles Intl flight prices with the expected peak season, weather and rainfall in Dulles Intl.
ONT - IAD
Price
$198 - $425
IAD
Temperature
35.6 - 80.6 °F
IAD
Rainfall
2.6 - 4 inches

Popular in

December

High demand for flights, 28% potential price rise

Cheapest in

September

Best time to find cheap flights, 35% potential price drop

Average price

$284

Average for round-trip flights in May 2022

Round-trip from

$198

From Ontario to Washington, D.C. Dulles Intl

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
When is the cheapest time to fly from Ontario to Washington, D.C. Dulles Intl Airport (ONT - IAD)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Washington, D.C. Dulles Intl Airport as you normally would.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 23 days in advance, which can save you up to 10% on flights from Ontario to Washington, D.C. Dulles Intl Airport compared to booking the week you need them. Waiting 23 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $289. For sooner than that we have options available in the next 3 days from $317.

What is the cheapest month to fly from Ontario to Washington, D.C. Dulles Intl Airport?

Flights from Ontario to Washington, D.C. Dulles Intl Airport lean towards being more expensive in December. Prices are generally better when you fly from Ontario to Washington, D.C. Dulles Intl Airport in August, with the cheapest ticket starting at $128.

Cheap flights from Ontario to Dulles Intl in May, June 2022

The best prices found for ONT to IAD flights for May, June
16 May - 21 May
$617pp
ONT
Ontario
United Airlines
 
1 STOP
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
United Airlines
   
2 STOPS
ONT
Ontario
21 May - 25 May
$678pp
ONT
Ontario
United Airlines
 
1 STOP
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
United Airlines
   
2 STOPS
ONT
Ontario
21 May - 28 May
$701pp
ONT
Ontario
United Airlines
 
1 STOP
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
United Airlines
 
1 STOP
ONT
Ontario

Ontario to Dulles Intl 2022 flight deals

Cheap flights to Dulles Intl from Ontario found for this year
24 Aug - 30 Aug
$436pp
ONT
Ontario
Delta
 
1 STOP
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Delta
 
1 STOP
ONT
Ontario
28 Oct - 1 Nov
$440pp
ONT
Ontario
United Airlines
 
1 STOP
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
United Airlines
   
2 STOPS
ONT
Ontario
14 Sep - 19 Sep
$454pp
ONT
Ontario
American Airlines
 
1 STOP
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
American Airlines
 
1 STOP
ONT
Ontario

Last minute flights from Ontario to Dulles Intl

Late deals on round-trip flights to Dulles Intl from Ontario, departing today and this week
21 May - 25 May
$678pp
ONT
Ontario
United Airlines
 
1 STOP
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
United Airlines
   
2 STOPS
ONT
Ontario
21 May - 28 May
$701pp
ONT
Ontario
United Airlines
 
1 STOP
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
United Airlines
 
1 STOP
ONT
Ontario
24 May - 28 May
$714pp
ONT
Ontario
United Airlines
 
1 STOP
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
United Airlines
 
1 STOP
ONT
Ontario

One-way flights to Dulles Intl from Ontario

The cheapest one-way flights from Ontario to Dulles Intl
2:00 am - 6:49 pm
Delta
3 Stops
13h 49m
ONT - IAD
Delta
$302
Delta
7:50 pm - 7:50 am
United Airlines
1 Stop
9h 00m
ONT - IAD
United Airlines
$339
United
8:34 pm - 6:59 am
American Airlines
1 Stop
7h 25m
ONT - IAD
American Airlines

Related info for your journey

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

Flight FAQs

From Ontario to Dulles Intl

What airport do you fly from for flights from Ontario to Washington, D.C. Dulles Intl?

Most people fly from Ontario (ONT) if they book a flight from Ontario to Washington, D.C. Dulles Intl. On average, Ontario has 0 outbound flights to Washington, D.C. Dulles Intl per day from 6 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

United Airlines, American Airlines, and Delta 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 Ontario to Washington, D.C. Dulles Intl Airport for under $500 on Cheapflights?

Yes, there are multiple flights from Ontario to Washington, D.C. Dulles Intl Airport for under $500. The cheapest flight booked recently is on Delta for just $436, but on average you can expect to pay $489.

Are there last-minute flights available from Ontario to Washington, D.C. Dulles Intl Airport for under $700?

There are currently 20+ open flights from Ontario to Washington, D.C. Dulles Intl Airport within the next 7 days for less than $700.

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

Cheapflights users have booked flights from Ontario to Washington, D.C. Dulles Intl Airport round-trip from $436. Other airlines that can offer you cheap pricing are American Airlines, from $454, and United Airlines, from $466.

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

To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $218. Delta flights start at $223 while deals on American Airlines start at $237 one-way.

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

When booking a flight from Ontario to Washington, D.C. Dulles Intl Airport, you may want to consider flying on American Airlines, Alaska Airlines or Delta as they are the most popular for this route.

What are the cheapest flights from Ontario to Washington, D.C. Dulles Intl Airport?

On average you can expect to pay $674 for a flight from Ontario to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $122 while the most popular route, (Ontario - Washington, D.C. Dulles Intl) is currently priced at $436.

COVID Restrictions

View COVID Travel Restrictions for Dulles Intl (IAD)

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

Information is based on travel restrictions for travel to Washington, D.C. Dulles Intl within the United States

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

COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Washington, D.C. Dulles Intl.

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

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

Returning to Ontario from Washington, D.C. Dulles Intl

COVID-19 testing requirements
Visitors from Washington, D.C. Dulles Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Ontario.

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

Hide COVID Travel Restrictions for Dulles Intl (IAD)

Alternative routes for Ontario to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Dulles Intl

Things to know before you go - useful duration and weather info for your trip from Ontario to Dulles Intl.
Average temperature for May in Dulles Intl
77.0 °F
Avg rainfall for May in Dulles Intl
4.4 ″

Airports servicing Ontario

Airports servicing Washington, D.C.

Top 4 airlines flying from Ontario to Washington, D.C. Dulles Intl

The chart below displays the airlines Cheapflights users traveling from Ontario to Dulles Intl 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
$149 $541 No cancel fee 62%
United Airlines
$167 $490 No cancel fee 69%
Delta
$210 $390 No cancel fee N/A
American Airlines
$223 $512 No cancel fee 71%
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