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ONT - WAS

Find cheap flights from Ontario to Washington, D.C. from $69

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Washington, D.C. departing on 5/7. 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
jue. 5/23
jue. 5/30

Search hundreds of travel sites at once for deals on flights to Washington, D.C.

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Washington, D.C., 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 Ontario to Washington, D.C., 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:

Save 22% or moreCompare multiple travel sites with one search.

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Ontario to Washington, D.C. (ONT-WAS)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Washington, D.C. 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
12:59 am - 12:00 pmONT-DCA
8h 01m1 stop
12:50 pm - 11:59 pmDCA-ONT
14h 09m1 stop
$142Frontier
Find Deal
lun., may. 13 - mié., may. 15
12:59 am - 12:00 pmONT-DCA
8h 01m1 stop
6:51 pm - 11:59 pmDCA-ONT
8h 08m1 stop
$143Frontier
Find Deal
mar., may. 7 - mar., may. 14
11:00 pm - 8:36 amONT-IAD
6h 36m1 stop
7:19 am - 11:24 amIAD-ONT
7h 05m1 stop
$278American Airlines
Find Deal
sáb., sep. 7 - mar., sep. 10
6:42 pm - 6:25 amONT-IAD
8h 43m1 stop
7:15 am - 12:13 pmIAD-ONT
7h 58m1 stop
$280Delta
Find Deal
mar., may. 7 - mié., may. 15
12:45 pm - 10:41 pmONT-IAD
6h 56m1 stop
5:31 pm - 11:26 pmIAD-ONT
8h 55m2 stops
$283American Airlines
Find Deal
sáb., sep. 28 - mar., oct. 1
1:20 pm - 11:53 pmONT-IAD
7h 33m1 stop
7:15 am - 12:13 pmIAD-ONT
7h 58m1 stop
$309Delta
Find Deal
lun., may. 13 - jue., may. 30
5:55 am - 4:20 pmONT-IAD
7h 25m1 stop
7:00 am - 12:25 pmIAD-ONT
8h 25m1 stop
$310United Airlines
Find Deal
dom., may. 26 - sáb., jun. 1
6:25 pm - 5:25 amONT-IAD
8h 00m1 stop
7:00 am - 12:45 pmIAD-ONT
8h 45m1 stop
$318United Airlines
Find Deal
vie., may. 24 - mar., may. 28
5:00 pm - 5:50 amONT-BWI
9h 50m1 stop
6:59 pm - 11:59 pmBWI-ONT
8h 00m1 stop
sáb., may. 11 - sáb., may. 25
4:20 pm - 5:40 amONT-BWI
10h 20m1 stop
6:59 pm - 11:59 pmBWI-ONT
8h 00m1 stop
sáb., may. 18 - sáb., may. 25

Flights from Ontario to Washington, D.C. - Travel Insights & Trends

Get data-powered insights and trends into flights from Ontario to Washington, D.C. 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 Ontario to Washington, D.C.?

The average price of all flights from Ontario to Washington, D.C. clicked on KAYAK for each day over the last 12 months.
For Ontario to Washington, D.C., Saturday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Washington, D.C. back to Ontario, the best deals are generally found on Tuesday, with Sunday being the most expensive.

What is the cheapest month to fly from Ontario to Washington, D.C.?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Ontario to Washington, D.C., 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 Ontario to Washington, D.C. is February, where tickets cost $268 on average. On the other hand, the most expensive months are June and December, where the average cost of tickets is $468 and $460 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Ontario to Washington, D.C., 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 Ontario to Washington, D.C., you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 79 days before departure.

Good to know

Low season

January

High season

August

Cheapest flight

$69
Best time to beat the crowds with an average 48% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from Ontario to Baltimore

When to book flights from Ontario to Washington, D.C.

Are your dates flexible? Find out the best times to travel from Ontario to Washington, D.C. 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 flights from Ontario to Washington, D.C.

  • What is the cheapest flight from Ontario to Washington, D.C.?

    In the last 3 days, the lowest price for a flight from Ontario to Washington, D.C. was $69 for a one-way ticket and $142 for a round-trip.

  • Do I need a passport to fly between Ontario and Washington, D.C.?

    No

  • Which airports will I be using when flying from Ontario to Washington, D.C.?

    When flying out of Ontario you will be using Ontario. You will be landing at one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl.

  • Which aircraft models fly most regularly from Ontario to Washington, D.C.?

    The Airbus A319 is the aircraft model that flies most regularly on the Ontario to Washington, D.C. flight route.

  • Which airline alliances offer flights from Ontario to Washington, D.C.?

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Washington, D.C. are Delta and United Airlines. With an average price for the route of $399 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 $584 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Ontario to Washington, D.C.?

    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 Ontario to Washington, D.C..

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Washington, D.C.?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Ontario 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 Ontario to Washington, D.C.?

    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 Washington, D.C. with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Washington, D.C.?

    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 Washington, D.C. from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Ontario to Washington, D.C.

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Washington, D.C.. 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 Ontario to Washington, D.C.? 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 11028 reviews
7.9comfort
8.6crew
7.5food
8.2boarding
8.0entertainment
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.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Like most domestic flights in the US, you are basically on your own with this airline when it comes to food, so be sure to purchase meals and drinks ahead of time or expect to arrive starving and dehydrated (like I was).

You need to be a hacker to get the (Free) WiFi

I guess they don’t serve drinks on planes anymore

It got me where I needed it to; not much more. It had no competition so that was why I chose it.

Plane didn’t even make it off the ground. We all had to get off and walk to a different terminal (lots of confusion) to get on a different plane. Landed fairly late, connections missed.

Crowded flight, but upbeat and kind crew. Pilot greeted us at door, flight attendant thanked a number of “special” passengers for their business, another addressed an eight-year old boy as “young man.” United obviously trying to up their game, but though all of that is nice and notable, flying still feels like moving along a human assembly line, being herded into one small space after another (boarding areas with too few seats, planes with limited personal space, shuttles (IAD) packed too full.

It was ok until we got to DC and I wanted to use my United Club pass and the snobbish receptionist said that they don’t take one pass. It took me everything itch of patience not to tell her off

Food choice was poor and we had to buy on board snacks.

We were offer chocolate cookies , not everyone eat chocolate. Thank you

Lost luggage again. Our second trip to Mykonos, and 2nd time no luggage.

Flight was well orchestrated, made up time despite circling a bit all good on United. Travelers can just be so into themselves that common courtesy has gone out window for some, but that’s not on United.

Loading was quick and efficient. The bate and switch with discount tickets were you are forced to pay for bag.

Good flight, comfortable seats and very quick passage through Heathrow. Boarding in Washington was cramped and not well organized, but the rest was perfect.

The Flight attendant had an attitude and didn't allow anyone any time to prepare for landing despite being absent throughout the entire trip

The flight was great until towards the end when the flight attendant read an excessively long commercial for purchasing an american airlines credit card. The worst part is that we are doing a lot of traveling this year so i was actually interested in getting the credit card, but I was so annoyed with the long commercial that I completely dismissed the flight attendant bringing around the information. Next time, keep the sales pitch to 10 seconds and then pass around the brochures!!

Nice aircraft. Plane was PACKED full and distance between seats was tight. Had it been more than a two hour flight it would not have been tolerable. I had much more knee space on the JetBlue flight I went out on.

New ridiculous policy by american destroyed my allegiance to american. As a million miler with american, I expected it would be easy to get on an earlier flight when I got to airport earlier than expected, and save a five hour layover. WRONG. The online app would not let me switch flights, So I called, and was promised a call back in 90 minutes. HAH! The customer service desk at DCA said “we no longer have access to changing a flight on our screens. If the app couldn’t do it, I should send a letter to American, but there’s nothing else possible!”

I am tired of being nickel and dimed for seat location, checked luggage and carry on bags. That is why i rarely fly anymore.

It was right on time and crew were very courteous

Great flight. Boarding was efficient and quick. On time departure and smooth flight. Flight arrived early at destination. Good experience.

Literally the worst experience ever and I had my service dog with me. Flight was supposed to leave at 1:51 PM but the plane arrived late. They boarded us around 3 PM and kept us on the plane for an hour saying that due to weather conditions in Miami, we could not takeoff yet. After waiting for an hour, they deplaned. And then they will not give us our bags back that we could just leave and schedule for another flight. Every hour they kept updating saying we have to wait another hour without any explanation as to what was going on. Eventually, I went to customer service to change my ticket, but by the time I made it to the front of the line, they started boarding my flight again. And then when we got onto the flight, they said there were two flight attendants That were past their shift. They kept us on the plane for about another 40 minutes until they told us they had no other flight attendance and had to deplane again. Then I gave us hotel vouchers and told us we would be on a flight at 6 AM the next day. At this point it is about 9 PM. I get to the hotel with my dog, who hasn’t been able to go potty for about eight hours. When I arrived at the hotel, I got a text alert saying my flight has been canceled at 6 AM and they moved past to 5 AM, however the hotel shuttle doesn’t leave early enough to make it to the airport for 5 AM flight. So me and some other passengers got a cab after about three hours of sleep to get back to the airport. This was the worst experience ever.

Their computers were down upon arrival to the airport. They were unable to figure out how to board us. We were delayed over an hour and a half.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

Kayak does not know that spirit airlines charged me $70 to fly. But the bag check-in was $89 each way. This is false advertising to lure people. Spirit airlines sends bunch of emails after flight purchases to buy wifi, better seats, priority boarding, secure reserved seats. This is false advertising. Up front pricing. I would of flown jet blue or Alaska airlines.

One hour late taking off. Concerning, very hard landing. Uncomfortable seats with no recline. Extremely slow baggage claim. Very professional, knowledgeable flight attendants. Brand new, very clean plane.

Can’t say there was anything I particularly liked. Seats were very tight, leather wrapped plastic. I followed up a much longer and cheaper trip from Honolulu on southwest, everything was phenomenal, this flight was the exact opposite. Blows my mind they charge for water of all things. One of the attendants seemed very rude, I watched a taller gentleman a couple rows forward with his knees pressed into the back of the seat ahead, while the woman in that seat leaned forward the entire flight, I’m sure because she could feel his knees. I’ll be avoiding spirit like the plague from here forward.

Didn’t make the connecting flight due to a delay on our first flight.

I felt scam to have to pay $50 additional for my carry on luggage which was free for my other airline.

Enjoyed the experience, on time flights, friendly staff the WiFi was intros d kept cutting out.

Awful experience. Both flights were delayed several times with weather but also crew members being the official cause. The vouchers are unusable and insufficient ($50 voucher to fly the same crappy airline is a joke for putting me on a red-eye that landed at 3:00 am). The aircrafts were old and uncomfortable (have a real pocket on the seat, for crying out loud!).

Its so random that they only allow 40 pounds on checked bags when all airlines take 55. They then charge you for each 10 extra pounds, so my checked suitcase was $130 and the flight $30 ... its like whattt, im for sure not traveling with Spirit again

It wasn’t as horrible as I would have expected, however, to not provide water and change so much for bags is a ripoff to say the least.

I was penalized for a mistake made by your team

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

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

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

Terrible. Seats are bad and the baggage policy is inconsistent

Better than I expected but I did pay for a seat and carry on bags ahead of time.

I hope to avoid flying with them in the future. First flight got cancelled then got stuck with a 13 hour layover in Denver. The process was long and frustrating to many people.

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

The flight was delayed and I had to cancel because I would have missed my connection and there were no other flights for the next two days. They also lost my bag!!

My first time to fly Frontier and loved it! Boarding was super easy as we only had personal items. Crew was helpful and funny and the plane was clean. Pilot was also great at landing the plane smoothly.

late late late late no accountability no refund no adjustment no reasonable solution

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

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Ontario to Washington, D.C. found on KAYAK in the last 72 hours.
5/7mar.
1 stopFrontier
7h 30mONT-BWI
$69
5/20lun.
1 stopFrontier
8h 04mONT-DCA
$71
5/11sáb.
1 stopAmerican Airlines
9h 46mONT-IAD
$139
5/11sáb.
1 stopDelta
8h 43mONT-IAD
$140
5/14mar.
2 stopsAmerican Airlines
10h 45mONT-IAD
$145
5/7mar.
2 stopsDelta
12h 30mONT-DCA
$145
6/11mar.
nonstopUnited Airlines
10h 31mONT-IAD
$181
5/7mar.
1 stopUnited Airlines
6h 38mONT-IAD
$190
5/15mié.
1 stopAlaska Airlines
20h 27mONT-IAD
$227
5/15mié.
2 stopsAlaska Airlines
19h 27mONT-IAD
$232

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Last minute flights from Ontario to Washington, D.C.

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 Ontario to Washington, D.C. that are departing in the next 10 days.
4/26vie.
multi-stopFrontier
8h 05mONT-BWI
5/1mié.
multi-stopFrontier
14h 30mBWI-ONT
$160
4/25jue.
multi-stopFrontier
13h 10mONT-BWI
4/27sáb.
multi-stopFrontier
13h 59mBWI-ONT
$171
4/27sáb.
multi-stop
9h 50mONT-BWI
5/4sáb.
multi-stop
13h 59mBWI-ONT
$450
4/25jue.
multi-stopAmerican Airlines
10h 04mONT-IAD
4/29lun.
multi-stopAmerican Airlines
8h 02mIAD-ONT
$571
4/26vie.
multi-stopAmerican Airlines
7h 43mONT-IAD
4/29lun.
multi-stopAmerican Airlines
10h 44mIAD-ONT
$576
4/25jue.
multi-stopDelta
8h 22mONT-DCA
4/30mar.
multi-stopDelta
13h 00mDCA-ONT
$579
4/27sáb.
multi-stopDelta
13h 25mONT-IAD
5/4sáb.
multi-stopDelta
8h 02mIAD-ONT
$579
4/25jue.
multi-stop
13h 10mONT-BWI
4/29lun.
multi-stop
12h 00mBWI-ONT
$629
4/25jue.
multi-stopUnited Airlines
8h 00mONT-DCA
5/7mar.
multi-stopUnited Airlines
15h 38mDCA-ONT
$655
4/28dom.
multi-stopUnited Airlines
7h 25mONT-IAD
4/29lun.
multi-stopUnited Airlines
7h 30mIAD-ONT
$674

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Ontario - Washington, D.C. Flights

Departure:

Ontario (ONT)United States

Return flight deals:

Washington, D.C. - Ontario

Cabin classes: