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Cheap flights from Ontario to Washington, D.C. from $62

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Washington, D.C. departing on 2/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to Washington, D.C.

Cheap round-trip flights

These are some of the best round-trip flight deals from Ontario to Washington, D.C. that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Ontario to Washington, D.C..

Cheap last minute flights

Planning a quick getaway from Ontario to Washington, D.C.? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Washington, D.C., so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Ontario to Washington, D.C.

Find recent round-trip train or bus tickets from Ontario to Washington, D.C..

All round-trip flight deals to Washington, D.C.

The cheapest plane tickets to Washington, D.C. found on KAYAK recently.
6:45 am - 9:59 pmONT-DCA
12h 14m1 stop
7:00 am - 11:47 pmDCA-ONT
19h 47m1 stop
$122Frontier
Find Deal
Thu, Jan 23 - Wed, Jan 29
6:45 am - 9:59 pmONT-DCA
12h 14m1 stop
7:00 am - 11:47 pmDCA-ONT
19h 47m1 stop
$123Frontier
Find Deal
Thu, Jan 23 - Wed, Jan 29
1:21 pm - 11:34 pmONT-BWI
7h 13m1 stop
7:15 am - 12:26 pmBWI-ONT
8h 11m1 stop
$336Delta
Find Deal
Tue, Jan 14 - Wed, Jan 22
1:21 pm - 11:36 pmONT-IAD
7h 15m1 stop
6:00 am - 11:50 amIAD-ONT
8h 50m1 stop
$336Delta
Find Deal
Tue, Jan 14 - Sat, Jan 25
10:56 am - 10:41 pmONT-IAD
8h 45m1 stop
5:24 pm - 10:45 pmIAD-ONT
8h 21m1 stop
$338American Airlines
Find Deal
Wed, Jan 8 - Tue, Jan 14
2:54 pm - 12:45 amONT-DCA
6h 51m1 stop
11:54 am - 6:35 pmDCA-ONT
9h 41m1 stop
$342American Airlines
Find Deal
Sat, Feb 22 - Sat, Mar 1
6:00 am - 6:45 pmONT-DCA
9h 45m1 stop
2:39 pm - 9:59 pmDCA-ONT
10h 20m1 stop
$366United Airlines
Find Deal
Wed, Feb 26 - Sun, Mar 2
1:45 pm - 11:30 pmONT-IAD
6h 45m1 stop
2:42 pm - 8:29 pmIAD-ONT
8h 47m1 stop
$396United Airlines
Find Deal
Thu, Jan 16 - Fri, Jan 24
3:50 pm - 1:20 amONT-BWI
6h 30m1 stop
4:30 pm - 9:45 pmBWI-ONT
8h 15m1 stop
$416Southwest
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Mon, Jan 27 - Mon, Feb 3
11:15 am - 8:45 pmONT-BWI
6h 30m1 stop
11:45 am - 7:00 pmBWI-ONT
10h 15m1 stop
$422Southwest
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Thu, Jan 16 - Fri, Jan 24
12:59 am - 12:03 pmONT-DCA
8h 04m1 stop
$62Frontier
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Tue, Feb 25
7:45 am - 5:02 pmONT-DCA
6h 17m1 stop
$64Frontier
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Wed, Jan 15
6:00 am - 11:54 pmONT-BWI
14h 54m2 stops
$162Delta
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Wed, Jan 22
1:21 pm - 11:34 pmONT-BWI
7h 13m1 stop
$168Delta
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Wed, Jan 8
6:10 am - 5:59 pmONT-DCA
8h 49m2 stops
$173American Airlines
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Wed, Jan 8
2:44 pm - 12:40 amONT-DCA
6h 56m1 stop
$174American Airlines
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Wed, Mar 19
12:25 pm - 12:50 amONT-BWI
9h 25m2 stops
$179Southwest
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Tue, Jan 21
11:15 am - 8:35 pmONT-DCA
6h 20m1 stop
$197Southwest
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Thu, Feb 20
6:00 am - 6:43 pmONT-DCA
9h 43m1 stop
$218United Airlines
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Wed, Feb 12
6:15 am - 4:28 pmONT-IAD
7h 13m1 stop
$218United Airlines
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Tue, Jan 21
12:59 am - 12:08 pmONT-DCA
8h 09m1 stop
1:01 pm - 11:44 pmDCA-ONT
13h 43m1 stop
$226Frontier
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Fri, Dec 27 - Thu, Jan 9
12:59 am - 4:59 pmONT-DCA
13h 00m1 stop
1:01 pm - 11:44 pmDCA-ONT
13h 43m1 stop
$258Frontier
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Tue, Dec 24 - Wed, Jan 8
11:56 am - 9:24 pmONT-DCA
6h 28m1 stop
6:05 am - 10:46 amDCA-ONT
7h 41m1 stop
$545Delta
Find Deal
Mon, Dec 23 - Wed, Jan 1
11:56 am - 9:40 pmONT-IAD
6h 44m1 stop
7:20 am - 12:24 pmIAD-ONT
8h 04m1 stop
$545Delta
Find Deal
Mon, Dec 23 - Tue, Feb 4
6:10 am - 4:15 pmONT-DCA
7h 05m1 stop
6:30 am - 11:46 amDCA-ONT
8h 16m1 stop
$586American Airlines
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Thu, Dec 26 - Wed, Jan 1
6:05 am - 4:24 pmONT-IAD
7h 19m1 stop
6:21 am - 11:46 amIAD-ONT
8h 25m1 stop
$586American Airlines
Find Deal
Thu, Dec 26 - Wed, Jan 1
5:05 am - 2:59 pmONT-DCA
6h 54m1 stop
4:13 pm - 8:51 pmDCA-ONT
7h 38m1 stop
$645United Airlines
Find Deal
Tue, Dec 24 - Sat, Jan 25
6:10 am - 4:17 pmONT-IAD
7h 07m1 stop
6:30 am - 12:40 pmIAD-ONT
9h 10m1 stop
$645United Airlines
Find Deal
Wed, Dec 25 - Wed, Jan 1
11:45 am - 11:00 pmONT-IAD
8h 15m1 stop
5:45 pm - 10:10 pmIAD-ONT
7h 25m1 stop
$686Southwest
Find Deal
Wed, Dec 25 - Tue, Dec 31
8:35 am - 10:20 pmONT-DCA
10h 45m1 stop
11:50 am - 6:55 pmDCA-ONT
10h 05m2 stops
$691Southwest
Find Deal
Wed, Dec 25 - Tue, Dec 31

American Airlines flights from Ontario to Washington, D.C.

Our best American Airlines deals on Ontario to Washington, D.C. flight tickets
American Airlines
Jan 8
ONT10:56 amOntario
8h 45m
1 stop
IAD10:41 pmWashington, D.C. Dulles Intl
Jan 14
IAD5:24 pmWashington, D.C. Dulles Intl
8h 21m
1 stop
ONT10:45 pmOntario
American Airlines
Feb 22
ONT2:54 pmOntario
6h 51m
1 stop
DCA12:45 amWashington, D.C. Reagan-National
Mar 1
DCA11:54 amWashington, D.C. Reagan-National
9h 41m
1 stop
ONT6:35 pmOntario
American Airlines
Feb 1
ONT6:10 amOntario
9h 47m
2 stops
DCA6:57 pmWashington, D.C. Reagan-National
Feb 4
DCA8:59 amWashington, D.C. Reagan-National
7h 52m
1 stop
ONT1:51 pmOntario

United Airlines flights from Ontario to Washington, D.C.

Our best United Airlines deals on Ontario to Washington, D.C. flight tickets
United Airlines
Feb 26
ONT6:00 amOntario
9h 45m
1 stop
DCA6:45 pmWashington, D.C. Reagan-National
Mar 2
DCA2:39 pmWashington, D.C. Reagan-National
10h 20m
1 stop
ONT9:59 pmOntario
United Airlines
Jan 16
ONT1:45 pmOntario
6h 45m
1 stop
IAD11:30 pmWashington, D.C. Dulles Intl
Jan 24
IAD2:42 pmWashington, D.C. Dulles Intl
8h 47m
1 stop
ONT8:29 pmOntario
United Airlines
Feb 18
ONT7:40 pmOntario
8h 12m
1 stop
BWI6:52 amBaltimore/Washington
Feb 19
BWI4:02 pmBaltimore/Washington
7h 50m
1 stop
ONT8:52 pmOntario

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Ontario to Washington, D.C.

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Ontario and Washington, D.C.?

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

The month of August is, on average, the cheapest month to fly to Washington, D.C. from Ontario, with most prices found around $306. If you’re not able to fly to Washington, D.C. in August, then February is your next best option. Flight prices from Ontario to Washington, D.C. during February average around $309.

What is the cheapest day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from Ontario is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $348. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Washington, D.C. for around $456.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

In the afternoon is the cheapest time of day to fly from Ontario to Washington, D.C. when you can find flight prices for as low as $317. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $416. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

The ideal time to book your flight to Washington, D.C. is 43 days in advance when prices tend to average $437. Don’t hesitate to check prices now though because momondo users recently found tickets for as low as $256.

Can stopping save me money on Ontario to Washington, D.C. flights?

You could potentially save up to 39% on your flight if you consider stops on a Ontario to Washington, D.C. flight.

How have Ontario to Washington, D.C. flight prices changed over time?

As of December 2024, prices for Ontario to Washington, D.C. flights are approximately 33% more expensive when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Washington, D.C. (ONT to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Washington, D.C.

Best Price Found

$62

Fastest flight time

4h 50m

Direct flights

None

Airports in Washington, D.C.

3 airports
The best one-way flight to Washington, D.C. from Ontario in the past 72 hours is $62. The best round-trip flight deal from Ontario to Washington, D.C. found on momondo in the last 72 hours is $122.
The fastest flight from Ontario to Washington, D.C. takes 4h 50m
There are no direct flights from Ontario to Washington, D.C.. Popular non-direct routes for this connection are Ontario Airport - Washington, D.C. Reagan-National Airport and Ontario Airport - Baltimore/Washington Airport.
There are 3 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)

  • How far is Ontario to Washington, D.C. by plane?

    Ontario and Washington, D.C. are 2260.6 mi apart from one another. In terms of flight time, this usually takes a little over 4h 50m.

  • When did momondo last update prices for flights from Ontario Airport to Washington, D.C.?

    Prices for flights from Ontario Airport to Washington, D.C. are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Washington, D.C.?

  • How old do you have to be to fly from Ontario Airport to Washington, D.C.?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Ontario to Washington, D.C.?


Best airlines flying from Ontario to Washington, D.C.

Compare and see reviews for airlines that fly from Ontario to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $148Free CancellationRating
6.1
3,472 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $151Free CancellationRating
6.3
8,111 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $255Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $256Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights
DeltaPriceFrom $262Free CancellationRating
8.0
8,594 reviews
Search Delta flights
SouthwestPriceFrom $296Free CancellationRating
8.1
4,804 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Washington, D.C.?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Washington, D.C.. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Washington, D.C.?

momondo helps you find the best flight between Ontario and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Washington, D.C. right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.