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DCA - ONT

$109 Find cheap flights from Reagan Washington National Airport to Ontario

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 8/24. 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
Sat 6/29
Sat 7/6

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 42,686,544 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
6:59 pm - 11:39 pmDCA-ONT
7h 40m1 stop
1:32 pm - 12:09 pmONT-DCA
19h 37m1 stop
$205Frontier
Find Deal
Tue, Aug 27 - Tue, Sep 3
7:00 am - 11:39 pmDCA-ONT
19h 39m1 stop
8:27 pm - 12:09 pmONT-DCA
12h 42m1 stop
$207Frontier
Find Deal
Tue, Aug 13 - Wed, Aug 21
6:59 pm - 11:39 pmDCA-ONT
7h 40m1 stop
12:49 am - 12:09 pmONT-DCA
8h 20m1 stop
$208Frontier
Find Deal
Tue, Aug 20 - Tue, Aug 27
6:59 pm - 11:44 pmDCA-ONT
7h 45m1 stop
12:49 am - 9:59 pmONT-DCA
18h 10m1 stop
$211Frontier
Find Deal
Sat, Aug 24 - Tue, Aug 27
6:59 pm - 11:44 pmDCA-ONT
7h 45m1 stop
12:49 am - 12:09 pmONT-DCA
8h 20m1 stop
$216Frontier
Find Deal
Sat, Aug 24 - Fri, Sep 6
7:00 am - 11:39 pmDCA-ONT
19h 39m1 stop
1:32 pm - 9:59 pmONT-DCA
29h 27m1 stop
$217Frontier
Find Deal
Tue, Sep 10 - Tue, Sep 17
6:00 am - 10:25 amDCA-ONT
7h 25m1 stop
11:23 am - 11:39 pmONT-DCA
9h 16m1 stop
$333Delta
Find Deal
Sat, Jul 6 - Sat, Jul 20
10:09 am - 7:42 pmDCA-ONT
12h 33m2 stops
10:00 pm - 9:00 amONT-DCA
8h 00m1 stop
$372Delta
Find Deal
Tue, Jun 18 - Tue, Jun 25
1:45 pm - 8:13 pmDCA-ONT
9h 28m1 stop
11:11 pm - 10:58 amONT-DCA
8h 47m1 stop
$375American Airlines
Find Deal
Wed, Oct 30 - Mon, Nov 4
11:00 am - 7:22 pmDCA-ONT
11h 22m2 stops
10:59 pm - 10:53 amONT-DCA
8h 54m1 stop
$383Delta
Find Deal
Thu, Sep 19 - Sun, Sep 22

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 Friday. On your return trip to Reagan Washington National Airport, you should consider flying back on a Friday, and avoid Tuesdays 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 January, where tickets cost $258 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $445 and $433 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 3 days before departure. For the absolute cheapest price, our data suggests you should book 40 days before departure.

Which airlines provide the cheapest flights from Reagan Washington National Airport to Ontario?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Reagan Washington National Airport to Ontario found on KAYAK was with Frontier for $109. Frontier proposed a round-trip connection from $205 and Delta from $333.

Good to know

Low season

October

High season

March

Cheapest flight

$109
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 31% 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 3 days, the lowest price for a flight from Washington, D.C. Reagan-National Airport to Ontario was $109 for a one-way ticket and $205 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 United Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Ontario are Delta and United Airlines. With an average price for the route of $533 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $736 and an overall rating of 7.4.

  • 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 4 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 10457 reviews
7.9Comfort
8.2Boarding
7.4Food
8.6Crew
8.0Entertainment
Airline reviews

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

8.0 ExcellentLiam, May 2024SLC - SJC
Read more about Delta reviews

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

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

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

they made me check my carryon. There was space in the overhead bins.

The plane was delayed 2 hours. The wifi did not work. The seat in first class was not comfortable because the bottom felt like it lost all of its padding. And I did not like when the flight attendant made me wait at my seat to use the bathroom and didn't tell me why. If there were too many people using the 1st Class bathroom, she should have told me to go in the back, coach bathrooms. I guess I have to feel fortunate that they found 2 local pilots to still fly the plane tonight after the original pilots ended up at an airport 60 miles away due to high winds.

The crew were really great, but the 4 hour delay in small chunks was the worst.

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

Just a crappy airline. The same every time. You feel you are a cow on a farm. You are being being whipped and pulled.

Wasn’t very crowded. Seamless processes. No issues traveling with two little kids.

My interaction with the flight attendent Eve was horrible. I was seated in 3F and was blown away watching her repeatedly skip me as she took other customer orders for lunch...she took the customer next to me but skipped me, then took everyone's order around me (in front of and behind me) . After she had taken every customer's orders to include those behind me, she came to me and said we are out of everything except one last item. I was mortified, in that, I am a 1k flyer, had pre-ordered AND as an African American could only assume why she repeatedly skipped me...mortified. no words

The Flight was good, pilot seemed very skillful. My wheel chair sister who could barely walk was allotted the second last seat in the aircraft, with great difficulty she managed to reach on her seat, as she required attendance we were given separate seat, even on request no one cared, so much so there were single passengers who were given twin seats. May not be taken as complaint but a reminder to the checkin staff to keep in mind in future the allottment of wheel chair passengers seats.

AA1537 the AC was not working properly. It was very hot and uncomfortable.

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

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.

9hrs delay and didn’t provided anything until after flight landed $75 voucher for fiuture travel no meals or anything.

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.

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.
8/24Sat
1 stopFrontier
7h 45mDCA-ONT
$109
9/17Tue
1 stopFrontier
8h 32mDCA-ONT
$110
6/18Tue
2 stopsDelta
12h 33mDCA-ONT
$133
7/6Sat
1 stopDelta
7h 25mDCA-ONT
$154
9/19Thu
1 stopUnited Airlines
9h 36mDCA-ONT
$195
9/17Tue
2 stopsAlaska Airlines
14h 15mDCA-ONT
$204
6/18Tue
2 stopsAlaska Airlines
15h 59mDCA-ONT
$214
10/18Fri
1 stopUnited Airlines
9h 56mDCA-ONT
$269
6/7Fri
2 stopsAmerican Airlines
11h 58mDCA-ONT
$435
6/9Sun
2 stopsAmerican Airlines
10h 37mDCA-ONT
$436

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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.
6/4Tue
multi-stopFrontier
19h 59mDCA-ONT
6/14Fri
multi-stopFrontier
18h 13mONT-DCA
$299
6/4Tue
multi-stopFrontier
8h 02mDCA-ONT
6/12Wed
multi-stopFrontier
10h 54mONT-DCA
$305
6/3Mon
multi-stopFrontier
8h 02mDCA-ONT
6/11Tue
multi-stopFrontier
17h 58mONT-DCA
$308
5/31Fri
multi-stopDelta
7h 41mDCA-ONT
6/29Sat
multi-stopDelta
8h 00mONT-DCA
$551
6/3Mon
multi-stopDelta
8h 39mDCA-ONT
6/5Wed
multi-stopDelta
12h 49mONT-DCA
$559
6/3Mon
multi-stopAlaska Airlines
10h 26mDCA-ONT
6/5Wed
multi-stopAlaska Airlines
8h 59mONT-DCA
$574
6/1Sat
multi-stopAlaska Airlines
9h 13mDCA-ONT
6/5Wed
multi-stopAlaska Airlines
10h 11mONT-DCA
$689
6/4Tue
multi-stopUnited Airlines
7h 34mDCA-ONT
6/8Sat
multi-stopUnited Airlines
13h 56mONT-DCA
$699
5/31Fri
multi-stopAmerican Airlines
9h 21mDCA-ONT
6/2Sun
multi-stopAmerican Airlines
8h 15mONT-DCA
$700
6/4Tue
multi-stopAmerican Airlines
9h 32mDCA-ONT
6/4Tue
multi-stopAmerican Airlines
9h 28mONT-DCA
$870

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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: