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$83+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ONT
mar. 10 — mar. 171
lun. 3/10
lun. 3/17
1 adult, Economy
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The best prices from Washington, D.C. Reagan-National to Ontario are usually found in November or October, booked 39 days in advance, depart on a Saturday or Tuesday and return on a Tuesday

Cheap flight deals from Reagan-National to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated marzo 5, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$200
(CheapOair)

One-way from

$83
(Cheapflightsfares)

Popular in

June

Cheapest in

November

Average price

$474
Provider with most accurate pricing for Washington, D.C. Reagan-National-Ontario flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Reagan-National-Ontario flights.
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From Washington, D.C. Reagan-National to Ontario
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One-way flight from Washington, D.C. Reagan-National to Ontario
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Highest demand for flights based on searches. 15% potential increase in price ($67 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Reagan-National to Ontario

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 marzo 5, 2025.

This CheapOair deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/31:03 pmDCA - ONT
1 stop13h 56mFrontier
vie. 4/412:49 amONT - DCA
1 stop8h 15mFrontier
Deal found 3/4$200
This American Airlines deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/195:14 pmDCA - ONT
1 stop7h 44mAmerican Airlines
lun. 4/2110:40 pmONT - DCA
1 stop7h 49mAmerican Airlines
Deal found 3/5$327
This Southwest deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/91:55 pmDCA - ONT
2 stops12h 05mSouthwest
lun. 4/1411:35 amONT - DCA
1 stop8h 55mSouthwest
Deal found 3/4$332
This Delta deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/256:00 amDCA - ONT
2 stops9h 13mDelta
sáb. 5/3112:16 pmONT - DCA
1 stop8h 27mDelta
Deal found 3/3$399
This Kiwi.com deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/176:00 pmDCA - ONT
1 stop8h 59mMultiple Airlines
mié. 4/166:55 amONT - DCA
2 stops12h 04mMultiple Airlines
Deal found 3/4$406
This United Airlines deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/244:17 pmDCA - ONT
1 stop7h 47mUnited Airlines
dom. 5/257:00 amONT - DCA
1 stop8h 15mUnited Airlines
Deal found 3/5$447
This Alaska Airlines deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/78:00 amDCA - ONT
1 stop10h 32mAlaska Airlines
vie. 5/96:24 pmONT - DCA
2 stops13h 36mAlaska Airlines
Deal found 3/5$502

Find flights from Reagan-National to Ontario within your budget

Customize your flight search to find flights from Reagan-National to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated marzo 5, 2025.

Fly from

Reagan-National

Fly to

Ontario

Route

Depart

Return

Price

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

jue. 4/3

1:03 pm-11:59 pm

1 stop13h 56m

Ontario

vie. 4/4

12:49 am-12:04 pm

1 stop8h 15m

$200

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

sáb. 4/19

5:14 pm-9:58 pm

1 stop7h 44m

Ontario

lun. 4/21

10:40 pm-9:29 am

1 stop7h 49m

$327

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

mié. 4/9

1:55 pm-11:00 pm

2 stops12h 05m

Ontario

lun. 4/14

11:35 am-11:30 pm

1 stop8h 55m

$332

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

dom. 5/25

6:00 am-12:13 pm

2 stops9h 13m

Ontario

sáb. 5/31

12:16 pm-11:43 pm

1 stop8h 27m

$399

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

lun. 3/17

6:00 pm-11:59 pm

1 stop8h 59m

Ontario

mié. 4/16

6:55 am-9:59 pm

2 stops12h 04m

$406

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

sáb. 5/24

4:17 pm-9:04 pm

1 stop7h 47m

Ontario

dom. 5/25

7:00 am-6:15 pm

1 stop8h 15m

$447

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

mié. 5/7

8:00 am-3:32 pm

1 stop10h 32m

Ontario

vie. 5/9

6:24 pm-11:00 am

2 stops13h 36m

$502

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

mar. 4/22

7:00 am-11:20 am

1 stop7h 20m

$83

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

mar. 4/22

5:10 pm-11:58 pm

1 stop9h 48m

$163

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

mar. 4/22

1:55 pm-10:36 pm

2 stops11h 41m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

Showing 1-10 of 14 results
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Compare providers for flights from Reagan-National to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Reagan-National to Ontario in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
GotogatePrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Reagan-National Airport-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Reagan-National Airport-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Have a flexible travel schedule? Discover the best time to fly to Ontario from Reagan-National with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Reagan-National to Ontario

Get recent, data-driven insights about flights from Reagan-National to Ontario including ideal travel times, pricing trends, and more.

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 February 28, 2025.

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 39 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.

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

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 $313). 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.

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 marzo 5, 2025.

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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

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.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated marzo 5, 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from Washington, D.C. to Ontario. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,321 reviews

Boarding

8.2

Food

7.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest
8.1
Very good
4,321 reviews
Southwest
8.1
Very good
4,321 reviews

Boarding

8.2

Food

7.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Alaska Airlines
8.0
Very good
9,711 reviews
Southwest
8.1
Very good
4,321 reviews

Boarding

8.2

Food

7.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Delta
8.0
Very good
8,044 reviews
Southwest
8.1
Very good
4,321 reviews

Boarding

8.2

Food

7.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Hawaiian Airlines
7.9
Good
2,318 reviews
Southwest
8.1
Very good
4,321 reviews

Boarding

8.2

Food

7.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

United Airlines
7.4
Good
8,655 reviews
Southwest
8.1
Very good
4,321 reviews

Boarding

8.2

Food

7.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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?

    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 5 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.

  • What are the cheapest airlines flying from Washington, D.C. Reagan-National Airport to Ontario round-trip?

    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 $200 on this airline. Additional options worth looking into are American Airlines and Southwest, starting at $327 and $332 round-trip. Frontier is priced at 45% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $83. However, be on the lookout for offers from Delta and Hawaiian Airlines, as they are both options that can get you from Washington, D.C. Reagan-National Airport to Ontario for a low price.

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

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

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

    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.

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

    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.

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

    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 $313). 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.

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Alternative routes for Reagan-National to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Reagan-National to Ontario

Discover the top 5 airlines that operate flights from Reagan-National to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated marzo 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$149Average$269FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$195Average$462FlexibilityNo cancel feeOn-time69%
DeltaCheapest$289Average$513FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$298Average$517FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$348Average$527FlexibilityNo cancel feeOn-time63%
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