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DCA - ONT

Find cheap flights from Reagan Washington National Airport to Ontario from $71

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 5/14. 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
0 bags
Fri 5/24
Fri 5/31

Search hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Ontario, as well as popular online travel agencies
In the last 7 days travelers have searched 44,632,927 times on KAYAK, and here is why:

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Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
7:00 am - 6:26 amDCA-ONT
26h 26m1 stop
12:59 am - 12:00 pmONT-DCA
8h 01m1 stop
$138Frontier
Find Deal
Tue, May 7 - Mon, May 13
7:00 am - 11:59 pmDCA-ONT
19h 59m1 stop
12:59 am - 12:03 pmONT-DCA
8h 04m1 stop
$141Frontier
Find Deal
Wed, May 15 - Mon, May 20
6:51 pm - 11:59 pmDCA-ONT
8h 08m1 stop
12:59 am - 12:03 pmONT-DCA
8h 04m1 stop
$142Frontier
Find Deal
Tue, May 14 - Fri, May 17
6:51 pm - 11:59 pmDCA-ONT
8h 08m1 stop
12:59 am - 12:03 pmONT-DCA
8h 04m1 stop
$143Frontier
Find Deal
Tue, May 14 - Fri, May 17
6:51 pm - 11:59 pmDCA-ONT
8h 08m1 stop
8:24 am - 9:59 pmONT-DCA
10h 35m1 stop
$145Frontier
Find Deal
Sat, May 11 - Sat, May 18
6:57 pm - 1:24 pmDCA-ONT
21h 27m1 stop
12:59 am - 9:59 pmONT-DCA
18h 00m1 stop
$148Frontier
Find Deal
Mon, May 20 - Tue, May 21
6:51 pm - 11:59 pmDCA-ONT
8h 08m1 stop
12:59 am - 9:59 pmONT-DCA
18h 00m1 stop
$150Frontier
Find Deal
Tue, May 14 - Tue, May 21
6:51 pm - 11:59 pmDCA-ONT
8h 08m1 stop
8:24 am - 6:07 pmONT-DCA
6h 43m1 stop
$151Frontier
Find Deal
Tue, May 14 - Sat, May 18
12:50 pm - 11:59 pmDCA-ONT
14h 09m1 stop
12:59 am - 12:03 pmONT-DCA
8h 04m1 stop
$152Frontier
Find Deal
Wed, May 8 - Mon, May 20
12:50 pm - 6:26 amDCA-ONT
20h 36m1 stop
7:26 am - 9:59 pmONT-DCA
11h 33m1 stop
$153Frontier
Find Deal
Tue, May 7 - Wed, May 15

Flights from Reagan-National to Ontario - Travel Insights & Trends

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.

What’s the cheapest day of the week to fly from Reagan Washington National Airport to Ontario?

The average price of all flights from Washington, D.C. Reagan-National Airport to Ontario clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Ontario on a Tuesday and more expensive on a Wednesday. On your return trip to Reagan Washington National Airport, you should consider flying back on a Friday, and avoid Mondays for better deals.

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 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 $249 on average. On the other hand, the most expensive months are March and June, where the average cost of tickets is $516 and $511 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Washington, D.C. Reagan-National Airport to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Washington, D.C. Reagan-National Airport to Ontario, you should book around 4 days before departure. For the absolute cheapest price, our data suggests you should book 57 days before departure.

Good to know

Low season

February

High season

September

Cheapest flight

$71
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly and prices are also 9% lower on average.
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 3 days, the lowest price for a flight from Washington, D.C. Reagan-National Airport to Ontario was $71 for a one-way ticket and $138 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?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Reagan Washington National Airport and Ontario, with oneworld being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Ontario are Delta and American Airlines. With an average price for the route of $568 and an overall rating of 8.0, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $520 and an overall rating of 7.3.

  • 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.

See more FAQs

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
DeltaOverall score based on 11004 reviews
7.5food
7.9comfort
8.0entertainment
8.2boarding
8.6crew
Airline reviews

There was a loud squeaky sound the whole time we were flying.

6.0 GoodEliza, Apr 2024SAN - LAX
Read more about Delta reviews

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Crew was not friendly when I went to request a seat change.

Really impressive staff at airport and on plane, especially given how busy it was

Was a great smooth flight from Detroit to San Diego.

Overall the flights pretty good. The snacks we’re good and they were plenty of them. Both boarding and deplaning went quickly.

Delayed abs delayed Gate crew giving poor info - we are definitely leaving at —- Ultimately to cancel flight after 4+ hours of delays Just cancel it earlier

The flight was scheduled to depart DCA at 12:30 pm but was delayed twice on the ground so that we were finally scheduled to depart at around 4:00 pm. Once we boarded, it was announced that takeoff would be delayed again to fix a hydraulic problem which delayed our eventual takeoff until around 5:00 pm. Once we departed, it was a smooth flight back to ORD. We did not get any explanation about what caused the original significant delay. In my experience, this happens frequently with AA.

Lots of weather delays that were poorly communicated and managed. I get there are weather delays but they didn’t make it clear what was happening or comfortable on the plane

Everything was on time; the flight attendants and the gate personnel were very pleasant and helpful.

Our second leg to Jackson WY was unable to land due to weather. We were flown back to Dallas after stopping in SLC. We were given hotel rooms and vouchers. We were told that we would be back on the same plane in the morning. Instead we were given a different flight with different seats. Not a good experience. No one knew what was going on.

Perfect flight. On time departure and early arrival. Smooth flight.

Awful! The flight was delayed and we sat on the plane in DCA for an hour because fuel was out in the wrong part of the plane and would not be accessible during flight. So the plane had to be refueled in correct tank. They also allowed someone to get off of the plane. This delayed my six hour flight by an hour and made me miss my connecting flight. I ran to new gate and American Airlines agents new about the delay and even knew that I was trying to make the connection. They knew thru communication with my friend while in flight that I was in the airport and running to the new gate and they still closed the gate and refused to let me on the new flight despite plane still being at the gate. It was horrible and I had to be rebooked on a flight for 24 hours later. This has been a nightmare and if American Airlines can cause customers to be delayed and then have zero empathy as having an on time flight was more important to them than helping a customer who was delayed by no fault of her own, then it's seems that it's not a company that I want to continue to give my loyalty to. I'm so disgusted.

Help was available but timing was bad in my case

It was a horrible snow storm, but updates were inconsistent and the app never displayed a remotely accurate time or gate until very close to boarding.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

The boarding time. I was in Section 1 the lady in charge just let people in section 3 without see us. Make a line , I have to step out and ask her. We were in the line and she just take my ticket and that’s it, so if I don’t ask her she could leave us at the end! We paid more for that privilege and. She doesn’t care….

See my previous comment which is mostly about our flight from Phoenix to SFO

The check in at the airport was awful. Told I need to pay for a bag. The item was taken at screening. I went back to get my $ back and they gave me a coupon with a QR code that doesn’t work. Worst costumer service ever!!!!!

4 hour delay because they used our aircraft to fly a different segment (per the captain)

Lost baggage on my connecting flight. 24 hours later, still no update on my bags.

I had to cancel within 1hour of the reservation an they put you through hell to . no live customer service desk. I'm handy caped and they make it almost impossible to cancel. They are steeling my money. You should not have that airline on your site. Contact me and I will give you all info. Of what the are doing to me just notable treatment they are set up like that to take people

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

Seats are cramped and very uncomfortable. You have to pay for everything and it is too expensive.

Book cheap flights from Washington, D.C. to Ontario

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Ontario found on KAYAK in the last 72 hours.
5/14Tue
1 stopFrontier
8h 08mDCA-ONT
$71
5/11Sat
1 stopFrontier
8h 08mDCA-ONT
$75
5/11Sat
2 stopsDelta
12h 58mDCA-ONT
$184
5/29Wed
2 stopsUnited Airlines
15h 28mDCA-ONT
$254
7/17Wed
1 stopUnited Airlines
7h 16mDCA-ONT
$259
8/11Sun
1 stopAmerican Airlines
6h 50mDCA-ONT
$263
5/2Thu
1 stopDelta
7h 33mDCA-ONT
$267
5/14Tue
2 stopsAlaska Airlines
14h 54mDCA-ONT
$274
5/8Wed
2 stopsAlaska Airlines
14h 54mDCA-ONT
$284
5/22Wed
2 stopsAmerican Airlines
9h 21mDCA-ONT
$288

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Last minute flights from Reagan-National to Ontario

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Washington, D.C. to Ontario that are departing in the next 10 days.
4/27Sat
multi-stopFrontier
14h 40mDCA-ONT
4/30Tue
multi-stopFrontier
8h 01mONT-DCA
$237
4/27Sat
multi-stopFrontier
14h 40mDCA-ONT
5/1Wed
multi-stopFrontier
7h 35mONT-DCA
$255
4/26Fri
multi-stopDelta
8h 22mDCA-ONT
4/29Mon
multi-stopDelta
8h 22mONT-DCA
$574
4/25Thu
multi-stopAmerican Airlines
8h 07mDCA-ONT
4/30Tue
multi-stopAmerican Airlines
9h 15mONT-DCA
$576
4/26Fri
multi-stopDelta
7h 23mDCA-ONT
4/29Mon
multi-stopDelta
10h 40mONT-DCA
$579
4/25Thu
multi-stopAmerican Airlines
9h 19mDCA-ONT
4/30Tue
multi-stopAmerican Airlines
9h 15mONT-DCA
$581
4/24Wed
multi-stopUnited Airlines
16h 04mDCA-ONT
4/26Fri
multi-stopUnited Airlines
8h 00mONT-DCA
$814
4/25Thu
multi-stopUnited Airlines
16h 04mDCA-ONT
4/29Mon
multi-stopUnited Airlines
8h 00mONT-DCA
$829
4/26Fri
multi-stopAlaska Airlines
14h 29mDCA-ONT
4/28Sun
multi-stopAlaska Airlines
11h 59mONT-DCA
$1,400
4/25Thu
multi-stopAlaska Airlines
12h 19mDCA-ONT
4/29Mon
multi-stopAlaska Airlines
11h 59mONT-DCA
$1,859

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Reagan Washington National Airport - Ontario Flights

Departure:

Reagan Washington National Airport (DCA)United States

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Reagan Washington National Airport

Cabin classes: