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Cheap flights from Washington, D.C. to Ontario from $64

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Ontario departing on 1/18. 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 Washington, D.C. to Los Angeles

Cheap round-trip flights

These are some of the best round-trip flight deals from Washington, D.C. to Los Angeles 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 Washington, D.C. to Los Angeles.

Cheap last minute flights

Planning a quick getaway from Washington, D.C. to Los Angeles? 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 Los Angeles, so you can enjoy a seamless trip without layovers.

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

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

All round-trip flight deals to Los Angeles

The cheapest plane tickets to Los Angeles found on KAYAK recently.
1:01 pm - 11:44 pmDCA-ONT
13h 43m1 stop
6:45 am - 4:59 pmONT-DCA
7h 14m1 stop
$127Frontier
Find Deal
Wed, Jan 8 - Thu, Jan 30
6:00 pm - 11:47 pmDCA-ONT
8h 47m1 stop
7:45 am - 9:59 pmONT-DCA
11h 14m1 stop
$128Frontier
Find Deal
Tue, Feb 4 - Tue, Feb 11
7:15 am - 11:50 amBWI-ONT
7h 35m1 stop
1:21 pm - 11:32 pmONT-BWI
7h 11m1 stop
$336Delta
Find Deal
Wed, Jan 29 - Wed, Feb 5
6:05 am - 10:46 amDCA-ONT
7h 41m1 stop
1:00 pm - 10:35 pmONT-DCA
6h 35m1 stop
$336Delta
Find Deal
Wed, Jan 1 - Wed, Jan 8
5:32 pm - 10:45 pmDCA-ONT
8h 13m1 stop
10:00 am - 10:15 pmONT-DCA
9h 15m2 stops
$341American Airlines
Find Deal
Sat, Jan 18 - Wed, Jan 22
4:13 pm - 8:51 pmDCA-ONT
7h 38m1 stop
6:00 am - 3:53 pmONT-DCA
6h 53m1 stop
$342United Airlines
Find Deal
Sat, Feb 8 - Sat, Feb 15
5:00 am - 11:58 amBWI-ONT
9h 58m2 stops
10:00 am - 12:18 amONT-BWI
11h 18m2 stops
$346American Airlines
Find Deal
Wed, Jan 8 - Wed, Jan 15
4:40 pm - 10:30 pmDCA-ONT
8h 50m2 stops
7:05 am - 6:05 pmONT-DCA
8h 00m1 stop
$401Southwest
Find Deal
Mon, Jan 20 - Mon, Jan 27
4:40 pm - 10:30 pmDCA-ONT
8h 50m2 stops
6:15 am - 6:05 pmONT-DCA
8h 50m2 stops
$406Southwest
Find Deal
Mon, Jan 20 - Mon, Jan 27
8:24 am - 12:41 pmBWI-ONT
7h 17m1 stop
1:43 pm - 11:09 pmONT-BWI
6h 26m1 stop
$436United Airlines
Find Deal
Tue, Jan 7 - Tue, Jan 14
6:00 pm - 11:47 pmDCA-ONT
8h 47m1 stop
$64Frontier
Find Deal
Sat, Jan 18
6:00 pm - 11:47 pmDCA-ONT
8h 47m1 stop
$69Frontier
Find Deal
Sat, Feb 1
12:39 pm - 10:40 pmBWI-ONT
13h 01m2 stops
$162Delta
Find Deal
Tue, Mar 18
4:47 pm - 10:52 pmBWI-ONT
9h 05m1 stop
$168Delta
Find Deal
Wed, Jan 22
11:59 am - 6:26 pmDCA-ONT
9h 27m2 stops
$173American Airlines
Find Deal
Sat, Feb 15
6:22 am - 3:29 pmIAD-ONT
12h 07m2 stops
$173American Airlines
Find Deal
Wed, Jan 8
2:15 pm - 8:10 pmIAD-ONT
8h 55m1 stop
$174United Airlines
Find Deal
Tue, Mar 18
6:55 am - 11:30 amDCA-ONT
7h 35m1 stop
$197Southwest
Find Deal
Mon, Feb 17
12:00 pm - 5:20 pmBWI-ONT
8h 20m1 stop
$199Southwest
Find Deal
Tue, Jan 21
2:15 pm - 10:45 pmIAD-ONT
11h 30m1 stop
$211United Airlines
Find Deal
Thu, Mar 13
6:00 pm - 11:42 amDCA-ONT
20h 42m1 stop
12:59 am - 12:08 pmONT-DCA
8h 09m1 stop
$420Frontier
Find Deal
Wed, Dec 25 - Thu, Jan 2
6:00 pm - 11:42 amDCA-ONT
20h 42m1 stop
12:59 am - 12:08 pmONT-DCA
8h 09m1 stop
$436Frontier
Find Deal
Wed, Dec 25 - Tue, Dec 31
6:57 pm - 11:41 pmIAD-ONT
7h 44m1 stop
1:00 pm - 12:22 amONT-IAD
8h 22m1 stop
$601Delta
Find Deal
Thu, Dec 26 - Mon, Jan 6
2:07 pm - 7:41 pmBWI-ONT
8h 34m1 stop
1:00 pm - 12:37 amONT-BWI
8h 37m1 stop
$631Delta
Find Deal
Fri, Dec 27 - Mon, Jan 6
4:05 pm - 8:49 pmIAD-ONT
7h 44m1 stop
1:42 pm - 11:25 pmONT-IAD
6h 43m1 stop
$645United Airlines
Find Deal
Tue, Dec 24 - Tue, Dec 31
5:50 pm - 11:00 pmIAD-ONT
8h 10m1 stop
10:47 am - 9:13 pmONT-IAD
7h 26m1 stop
$651United Airlines
Find Deal
Fri, Dec 27 - Sat, Jan 11
6:21 am - 1:58 pmIAD-ONT
10h 37m1 stop
12:36 pm - 10:39 pmONT-IAD
7h 03m1 stop
$674American Airlines
Find Deal
Fri, Dec 27 - Sun, Dec 29
5:20 pm - 9:15 pmIAD-ONT
6h 55m1 stop
1:55 pm - 1:00 amONT-IAD
8h 05m1 stop
$710Southwest
Find Deal
Thu, Dec 26 - Sun, Dec 29
5:15 am - 9:45 amIAD-ONT
7h 30m1 stop
12:55 pm - 1:05 amONT-IAD
9h 10m2 stops
$719Southwest
Find Deal
Mon, Dec 23 - Sat, Dec 28
6:21 am - 11:46 amIAD-ONT
8h 25m1 stop
6:05 am - 4:24 pmONT-IAD
7h 19m1 stop
$783American Airlines
Find Deal
Fri, Dec 27 - Sat, Jan 4

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

Our best Alaska Airlines deals on Washington, D.C. to Ontario flight tickets
Alaska Airlines
May 6
IAD6:30 amWashington, D.C. Dulles Intl
12h 02m
1 stop
ONT3:32 pmOntario
May 13
ONT11:46 amOntario
9h 12m
1 stop
IAD11:58 pmWashington, D.C. Dulles Intl
Alaska Airlines
Feb 24
IAD6:48 pmWashington, D.C. Dulles Intl
19h 14m
1 stop
ONT11:02 amOntario
Feb 26
ONT6:00 amOntario
8h 48m
1 stop
IAD5:48 pmWashington, D.C. Dulles Intl
Alaska Airlines
Feb 26
BWI6:56 pmBaltimore/Washington
19h 06m
1 stop
ONT11:02 amOntario
Mar 12
ONT6:00 amOntario
8h 56m
1 stop
BWI5:56 pmBaltimore/Washington

Southwest flights from Washington, D.C. to Ontario

Our best Southwest deals on Washington, D.C. to Ontario flight tickets
Southwest
Jan 20
DCA4:40 pmWashington, D.C. Reagan-National
8h 50m
2 stops
ONT10:30 pmOntario
Jan 27
ONT7:05 amOntario
8h 00m
1 stop
DCA6:05 pmWashington, D.C. Reagan-National
Southwest
Jan 20
DCA4:40 pmWashington, D.C. Reagan-National
8h 50m
2 stops
ONT10:30 pmOntario
Jan 27
ONT6:15 amOntario
8h 50m
2 stops
DCA6:05 pmWashington, D.C. Reagan-National
Southwest
Jan 18
BWI8:30 amBaltimore/Washington
12h 25m
2 stops
ONT5:55 pmOntario
Jan 22
ONT12:25 pmOntario
9h 25m
2 stops
BWI12:50 amBaltimore/Washington

See travel insights to Los Angeles from

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

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 Washington, D.C. and Ontario?

What is the cheapest month to fly to Ontario?

In general, February is the cheapest month to fly from Washington, D.C. to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $283. If you aren’t able to travel during the month of February, then book flights to Ontario from Washington, D.C. during May instead. Flights to Ontario in May, while not as cheap as those in February, still average around $288.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $323. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to Ontario for around $480.

What is the cheapest time of day to depart on your flight to Ontario?

In the afternoon is the cheapest time of day to fly from Washington, D.C. to Ontario when you can find flight prices for as low as $366. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $431 on average. Flights to Ontario from Washington, D.C. in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Ontario?

Most flyers found that booking tickets 13 days in advance of their planned departure date is the best time to get cheap flights to Ontario. During this timeframe, flight prices are around $428. However, in the past 72 hours, people saw flights from Washington, D.C. for as low as $226.

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

You could potentially save up to 31% on your flight if you consider stops on a Washington, D.C. to Ontario flight.

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

As of December 2024, prices for Washington, D.C. to Ontario flights are approximately 0% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$64

Fastest flight time

7h 08m

Direct flights

None

Airports in Ontario

1 airport
The best one-way flight to Ontario from Washington, D.C. in the past 72 hours is $64. The best round-trip flight deal from Washington, D.C. to Ontario found on momondo in the last 72 hours is $127.
The fastest flight from Washington, D.C. to Ontario takes 7h 08m
There are no direct flights from Washington, D.C. to Ontario. Popular non-direct routes for this connection are Washington, D.C. Reagan-National Airport - Ontario Airport, Washington, D.C. Dulles Intl Airport - Ontario Airport and Baltimore/Washington Airport - Ontario Airport.
There is 1 airport near Ontario: Ontario (ONT)

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

    A flight from Washington, D.C. to Ontario will travel around 2260.6 mi. Flights usually cover this in 7h 08m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Washington, D.C. to Ontario Airport were last updated today.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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


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

Compare and see reviews for airlines that fly from Washington, D.C. to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $148Free CancellationRating
6.1
3,472 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $154Free CancellationRating
6.3
8,111 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $195Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights
American AirlinesPriceFrom $219Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $256Free CancellationRating
8.0
8,594 reviews
Search Delta flights
SouthwestPriceFrom $326Free CancellationRating
8.1
4,804 reviews
Search Southwest flights
  • Southwest Flights From Washington, D.C. to Ontario

    Southwest is one of the most popular airlines flying from Washington, D.C. to Ontario, operating 8 flights/week on average for this route. A good Southwest flight deal for Washington, D.C. to Ontario starts from $326 round-trip, up to an average price of $487. Our users have rated Southwest at 8.1/10.


Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Washington, D.C..

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

momondo does allow users to show only those flights to Ontario from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for Washington, D.C. to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Washington, D.C. to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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