DCA - ONT

$118 Find Cheap Flights from Reagan Washington National Airport to Ontario - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Reagan-National to Ontario departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$323
Typical prices: $269-$426
Frontier
Mon 8/3Thu 8/6
DCA - ONT • 1 stop
Cheapest one-way
$118
Typical prices: $165-$353
Frontier
Mon 8/10
DCA - ONT • 1 stop
Top airlines
Cheapest • from $323 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Reagan-National and Ontario. You'll need at least 1 connection.
Insights
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Insights
Insights
Top layover airports
Cheapest • Avg $239 (round-trip)
Shortest trip • 7h 38m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 33% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Reagan-National to Ontario (DCA-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Reagan-National to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Reagan-National to Ontario

Mon, Aug 3 - Thu, Aug 6
Frontier Logo
7:00 am - 11:50 pm
DCA
-
ONT
19h 50m
1 stop
Frontier Logo
6:00 am - 12:51 pm
ONT
-
DCA
27h 51m
1 stop
$323Frontier
Wed, Aug 5 - Tue, Aug 18
Frontier Logo
1:59 pm - 11:50 pm
DCA
-
ONT
12h 51m
1 stop
Frontier Logo
7:56 pm - 12:51 pm
ONT
-
DCA
13h 55m
1 stop
$325Frontier
Sat, Aug 8 - Sun, Aug 16
Frontier Logo
1:59 pm - 11:50 pm
DCA
-
ONT
12h 51m
1 stop
Frontier Logo
10:49 am - 12:51 pm
ONT
-
DCA
23h 02m
1 stop
$327Frontier
Mon, Aug 3 - Fri, Aug 7
Frontier Logo
7:00 am - 11:50 pm
DCA
-
ONT
19h 50m
1 stop
Frontier Logo
6:00 am - 9:59 pm
ONT
-
DCA
12h 59m
1 stop
$328Frontier
Sat, Sep 5 - Mon, Sep 7
Frontier Logo
6:00 pm - 11:50 pm
DCA
-
ONT
8h 50m
1 stop
Frontier Logo
10:49 am - 4:59 pm
ONT
-
DCA
27h 10m
1 stop
$329Frontier
Thu, Aug 13 - Sun, Aug 16
Frontier Logo
6:00 pm - 11:50 pm
DCA
-
ONT
8h 50m
1 stop
Frontier Logo
10:49 am - 12:51 pm
ONT
-
DCA
23h 02m
1 stop
$330Frontier
Thu, Aug 13 - Sun, Aug 16
Frontier Logo
6:00 pm - 10:04 am
DCA
-
ONT
19h 04m
1 stop
Frontier Logo
10:49 am - 12:51 pm
ONT
-
DCA
23h 02m
1 stop
$332Frontier
Fri, Sep 4 - Mon, Sep 7
Frontier Logo
6:00 pm - 11:50 pm
DCA
-
ONT
8h 50m
1 stop
Frontier Logo
10:49 am - 4:59 pm
ONT
-
DCA
27h 10m
1 stop
$333Frontier
Wed, Aug 5 - Tue, Aug 18
Frontier Logo
7:00 am - 10:04 am
DCA
-
ONT
30h 04m
1 stop
Frontier Logo
6:00 am - 12:51 pm
ONT
-
DCA
27h 51m
1 stop
$335Frontier
Wed, Aug 26 - Wed, Sep 2
Frontier Logo
7:00 am - 3:54 pm
DCA
-
ONT
11h 54m
2 stops
Frontier Logo
6:00 am - 9:59 pm
ONT
-
DCA
12h 59m
1 stop
$336Frontier
Booking Insights

KAYAK's insights & trends for Reagan-National to Ontario flights

Get data-powered insights and trends into flights from Reagan-National to Ontario to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Washington, D.C. Reagan-National Airport to Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. Reagan-National Airport to Ontario departing in August.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Reagan-National Airport to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Reagan-National Airport to Ontario is September, where tickets cost $297 (return) on average. On the other hand, the most expensive months are June and April, where the average cost of round-trip tickets is $615 and $568 respectively.

Good to know

Low season

May

Cheapest flight

$118
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly with an average 13% increase in price.
Flight from Reagan Washington National Airport to Ontario

When to book flights from Reagan-National to Ontario

Are your dates flexible? Find out the best times to travel from Reagan-National to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Reagan Washington National Airport to Ontario flights

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

    In the last 5 days, the lowest price for a flight from Washington, D.C. Reagan-National Airport to Ontario was $118 for a one-way ticket and $323 for a round-trip.

  • Do I need a passport to fly between Reagan Washington National Airport and Ontario?

    A passport is not required to fly from Reagan Washington National Airport to Ontario.

  • Which airports will I be using when flying from Reagan Washington National Airport to Ontario?

    Reagan Washington National Airport and Ontario are both served by 1 main airport. You will leave Reagan Washington National Airport from Washington, D.C. Reagan-National and will be arriving at Ontario.

  • Which aircraft models fly most regularly from Reagan Washington National Airport to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Reagan Washington National Airport to Ontario?

    oneworld is the only airline alliance operating flights between Reagan Washington National Airport and Ontario.

  • Which is the best airline for flights from Washington, D.C. to Ontario, Southwest or American Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Ontario are Southwest and American Airlines. With an average price for the route of $485 and an overall rating of 8.0, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $529 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Reagan Washington National Airport to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Reagan Washington National Airport to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Reagan Washington National Airport to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Reagan Washington National Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Reagan Washington National Airport to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Reagan Washington National Airport with another airline. Booking your flights between Reagan Washington National Airport and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Reagan Washington National Airport to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Reagan Washington National Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Reagan-National to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Reagan-National to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4242 reviews
7.5Entertainment
8.1Boarding
8.6Crew
7.0Food
8.0Comfort
Airline reviews

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

2.0 MediocreIrene, Jun 2026
DEN - SFO
Read more Southwest reviews

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

It was just okay, no frills, basic transportation with no luxury. No screens on the seats, no water or drinks on a short flight. Full flight but at least it was on time.

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

Haven’t flown on SW in years. Flight was on time departing and arriving. Served vegan butter onion flavored pretzels which were bad. Coke served was in a tiny paper cup. Crew was not engaging. Felt like they were going through the motions. Old plane, tight seats and no leg room.

No delays and arrived to destination 30 min early. Staff was super friendly.

Pretty standard flight. We left late, but arrived early. The wifi entertainment is always nice. The free snacks and beverages are simple, but appreciated. I'm tall and the seats are an issue. I can deal with a short flight, but any longer, I have to find another airline where I know beforehand I have extra legroom.

Our flight to Oakland was great bc the plane was new but it was delayed by 15min not bad at all. Over all it was an 8/10

The flight in it self was good. The delays looking for pilots was unexpected.

Awesome experience. No in-flight video or meal. Still do not like the boarding process.

On time, good crew, easy flight. Just like the old days!

The seats were extremely cramped, with very little legroom or personal space. There was no room left in the overhead bins for a backpack, and the space under the seat in front was so limited that I could barely fit my bag underneath. Overall, the seating arrangement felt very uncomfortable and overcrowded.

Overall a good experience, however Wifi was not working on the flight.

THe flight was an hour late. You got us on the plan and we sat on the ground for 45 minutes with no information from the pilot whatsoever. Worst flight this year.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

Incoming flight was delayed, delaying boarding. It then took 30 mins to take off. Took 20 mins to get to a gate because they changed the gate last minute, crew weren’t ready so there was no one staffed to work the jet bridge. Boarding was so disorganized as is usual with American because everyone just stands around the gate regardless of boarding group.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

Amazing I love American. I’ll never fly anyone else if I can help it.

We were told the flight was delayed 5 times, then it was moved to the next day.

Everything was great except for the wifi was junk. Crew was super friendly and helpful

It was fine. I didn't love the food but it was at least a real attempt at serving a meal, unlike my earlier flight from Nashville to Dallas.

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

Frontier Airlines was AWFUL. I was an hour early for my flight and the lady refused to check me in. I had to purchase a whole new ticket with a different airline.

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

Frontier is definitely a good option for people traveling light or on a budget - just remember to bring your own entertainment and your own headphones if you need them.

Flight was cancelled and was not able to get another flight thru Frontier. Per frontier a refund was issued but I do not see a refund on my Afirm account.

Never offer anything to drink ☹️ Flight delayed gate moved poor communication

The agent at check-in was strident, unwelcoming, and condescending to customers ahead of me.

It’s a cheap airline. I wish they had better seats.

Was charged 99 dollars for a bag despite agents previously telling me it would be ok. Customer service was unhelpful

I will like you ( Frontier Airlines) to fly into LAX instead of ONT because I live in LA and the subway takes me to my house in just 15 minutes

Everything you need to know for your flight from Reagan-National to Ontario

Information on your arrival and departure airports