Question 1

What is the cheapest airline to fly from Washington, D.C. Reagan-National Airport to Ontario round-trip?

Accepted Answer

Our cheapest airline available from Washington, D.C. Reagan-National Airport to Ontario is Frontier. Our recent data shows that you can find tickets from as low as $217 on this airline. Frontier is priced at 38% lower than the current average price of a flight leaving 3 months from now.

Question 2

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

Accepted Answer

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $105. However, be on the lookout for offers from Alaska Airlines and Delta, as they are both options that can get you from Washington, D.C. Reagan-National Airport to Ontario for a low price.

Question 3

How far ahead should I book a flight from Washington, D.C. Reagan-National Airport to Ontario?

Accepted Answer

To ensure you get the cheapest price possible for a flight from Washington, D.C. Reagan-National Airport to Ontario, you should look to book at least 30 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Question 4

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Ontario?

Accepted Answer

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Ontario (average of $246). Flying from Washington, D.C. Reagan-National Airport to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 5

What is the cheapest day to fly from Washington, D.C. Reagan-National Airport to Ontario?

Accepted Answer

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to Ontario flight should consider departing on Tuesday mornings when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

E

Accepted Answer

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Question 7

E

Accepted Answer

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Question 8

What are the most popular airlines that fly from Washington, D.C. Reagan-National Airport to Ontario?

Accepted Answer

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

Question 9

What is the cheapest day to fly round-trip from Washington, D.C. Reagan-National Airport to Ontario?

Accepted Answer

Leaving on a Friday 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 64% on the overall cost on flights from Washington, D.C. Reagan-National Airport to Ontario.

Question 10

How far in advance should I book a flight from Washington, D.C. Reagan-National Airport to Ontario?

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 83% on flights from Washington, D.C. Reagan-National Airport to Ontario compared to booking the week you need them. Waiting 61 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 $402. For sooner than that we have options available in the next 3 days from $597.

Question 11

What is the cheapest month to fly from Washington, D.C. Reagan-National Airport to Ontario?

Accepted Answer

Flights from Washington, D.C. Reagan-National Airport to Ontario lean towards being more expensive in December. Prices are generally better when you fly from Washington, D.C. Reagan-National Airport to Ontario in September, with the cheapest ticket starting at $120.

Question 12

What is the cheapest time of day to fly from DCA to ONT?

Accepted Answer

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Reagan-National Airport to Ontario in the afternoon. If you’re flexible enough to do this you can expect to save up to 31% on your trip compared to booking a flight in the evening.

Question 13

What airport do you fly into for flights to Ontario from Washington, D.C. Reagan-National?

Accepted Answer

Ontario (ONT) is the airport you will fly into if you book a flight from Washington, D.C. Reagan-National to Ontario. You should not have trouble finding flights to Ontario from Washington, D.C. Reagan-National; the airport handles an average of 0 inbound flights from Washington, D.C. Reagan-National per day. You should also have plenty of airline options to choose from since 4 airlines have flights to the Ontario airport from Washington, D.C. Reagan-National. It is only a 3.1 mi journey from Ontario (ONT) to Ontario’s city center.

Question 14

Can I find deals for flights from Reagan-National to Ontario that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Reagan-National to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

Question 15

How can I find direct flights from Reagan-National to Ontario?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Ontario.

Question 16

Can I find deals for business class flights from Reagan-National to Ontario?

Accepted Answer

Yes. Cheapflights offers flight deals from Reagan-National to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Round-trip from	$217 (Kiwi.com)
One-way from	$105 (Kiwi.com)
Popular in	June
Cheapest in	November
Average price	$425

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$148	Average$257	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$296	Average$431	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$296	Average$487	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$348	Average$458	FlexibilityNo cancel fee	On-time63%

$105+ Cheap flights from Reagan-National (DCA) to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/19. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to Ontario are usually found in November or February, booked 30 days in advance, depart on a Saturday or Tuesday and return on a Tuesday

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Cheapest flights from Reagan-National to OntarioExplore the most affordable flight options available from Reagan-National to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Explore the most affordable flight options available from Reagan-National to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

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Best time to book a flight from Reagan-National to Ontario

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Everything you need to know about your flight from Washington, D.C. Reagan-National Airport to Ontario

How far ahead should I book a flight from Washington, D.C. Reagan-National Airport to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Reagan-National to Ontario. Price data was last updated on June 27, 2025.

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Ontario?

What is the cheapest time of day to fly from DCA to ONT?

Find hourly flight availability from Reagan-National to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

Reviews of airlines servicing Ontario

See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Washington, D.C. Reagan-National Airport to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Ontario from Washington, D.C. Reagan-National?

What is the cheapest airline to fly from Washington, D.C. Reagan-National Airport to Ontario round-trip?

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

Can I find deals for flights from Reagan-National to Ontario that include hotel bookings?

How can I find direct flights from Reagan-National to Ontario?

Can I find deals for business class flights from Reagan-National to Ontario?

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Ontario?

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Alternative routes for Reagan-National to Ontario

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Top 4 airlines flying from Reagan-National to Ontario

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Cheapest flights from Reagan-National to Ontario
Explore the most affordable flight options available from Reagan-National to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.