ont-to-iad

 

The cheapest times to fly from ONT to IAD are

  • January 1st to February 18th
  • April 23rd to May 6th
  • July 30th to November 18th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ONT to IAD is early to mid September. Prices can be as high as $1112 for Sunday flights during mid May, or as low as $249 for Tuesday flights around early to mid September.

 

When to Fly to Washington

Flying from Ontario, CA (ONT) to Washington, DC (IAD) will usually cost between $285 to $720 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid September with an average ticket price of $315. Due to high demand the most expensive time to fly is mid May, with an average price of $772. Planning your trip to low-cost times can easily save you $457 on economy flights and even more on first-class flights. Generally, any price below $407 can be considered a good price for a round-trip ONT to IAD flight.

See below for a graph of average weekly prices for the ONT to IAD route. All prices are for round-trip tickets in USD.

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ONT to IAD Flight Prices

Compared to other flights, the ONT to IAD flight is much cheaper than the average and costs much less than the average flight leaving from Ontario. The average price per mile (for a direct flight) is $0.11, which is far below average.

 

Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $170 (31%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $379. Return trip prices are from the IAD to ONT flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

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Departure Day Prices

Return Trip Prices by Day

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Return Day Prices

 

Nonstop Flights and Layovers

Travelers looking to fly from ONT to IAD can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 5 hour 0 minutes may not be realistic.

 

Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from ONT to IAD while comparing.

Destination alternative #1: Baltimore/Washington International Thurgood Marshall Airport (BWI) in Baltimore, MD

  • 45 miles (72 km) away from IAD
  • Usually 3.69% less expensive than IAD
  • 1-layover flights available

See ONT to BWI flights

Destination alternative #2: Ronald Reagan Washington National Airport (DCA) in Washington, DC

  • 24 miles (39 km) away from IAD
  • Usually 1.72% less expensive than IAD
  • 1-layover flights available

See ONT to DCA flights

 

Flight Questions Answered

Still have questions about flying from ONT to IAD? We’ve got answers.

Which airlines fly this route?

You can find 6 major airlines flying this route most often: Alaska, American, Delta, Frontier, Southwest, United, and potentially more during busy seasons.

How far away is it from Washington Dulles International Airport to Ontario International Airport?

The distance between the two airports is roughly 2236 miles or 3598 kilometers.

How long does it take to fly from ONT to IAD?

The real-world flight time for a nonstop ONT to IAD flight is about 5 hour 0 minutes.

How many flights go between Ontario, CA and Washington, DC?

It depends on the day of the week and the date, but a typical day might have around 84 available flights from ONT to IAD.

 

Airport Location Info

 

Departing Airport

Origination code ONT
Origination airport name Ontario International Airport
City Ontario, CA
Country the United States
Latitude 34.1
Longitude -117.6

Return Airport

Destination code IAD
Destination airport name Washington Dulles International Airport
City Washington, DC
Country the United States
Latitude 38.9
Longitude -77.5

 

Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.