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Cheap flights from Washington, D.C. Reagan-National Airport to Los Angeles from $80

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. Reagan-National Airport to Los Angeles departing on 10/6. 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. Reagan-National Airport to Los Angeles (DCA-ONT)

Cheap round-trip flights

Frontier Logo
7:00 am - 7:54 pmDCA-ONT
15h 54m1 stop
Frontier Logo
8:59 pm - 12:10 pmONT-DCA
12h 11m1 stop
$143Frontier
Find Deal
Fri, Oct 3 - Sun, Oct 5
Frontier Logo
1:00 pm - 7:23 amDCA-ONT
21h 23m1 stop
Frontier Logo
8:59 pm - 4:59 pmONT-DCA
17h 00m1 stop
$167Frontier
Find Deal
Thu, Sep 4 - Fri, Sep 5
Frontier Logo
7:00 am - 7:54 pmDCA-ONT
15h 54m1 stop
Frontier Logo
3:43 pm - 12:10 pmONT-DCA
17h 27m1 stop
$168Frontier
Find Deal
Tue, Sep 9 - Sun, Sep 14
Frontier Logo
7:00 am - 7:54 pmDCA-ONT
15h 54m1 stop
Frontier Logo
8:59 pm - 12:10 pmONT-DCA
12h 11m1 stop
$169Frontier
Find Deal
Tue, Sep 16 - Thu, Sep 18
Southwest Logo
6:05 am - 11:30 amDCA-ONT
8h 25m1 stop
Southwest Logo
5:45 am - 6:15 pmONT-DCA
9h 30m2 stops
$273Southwest
Find Deal
Sat, Dec 6 - Tue, Dec 16
Delta Logo
6:00 am - 10:42 amDCA-ONT
7h 42m1 stop
Delta Logo
11:55 am - 9:44 pmONT-DCA
6h 49m1 stop
$277Delta
Find Deal
Tue, Sep 16 - Tue, Sep 23
Delta Logo
6:00 am - 10:42 amDCA-ONT
7h 42m1 stop
Delta Logo
11:55 am - 9:44 pmONT-DCA
6h 49m1 stop
$278Delta
Find Deal
Thu, Sep 11 - Wed, Sep 17
Southwest Logo
3:30 pm - 9:25 pmDCA-ONT
8h 55m2 stops
Southwest Logo
6:45 am - 9:50 pmONT-DCA
12h 05m1 stop
$279Southwest
Find Deal
Tue, Oct 7 - Sat, Oct 18
American Airlines Logo
5:00 am - 11:55 amDCA-ONT
9h 55m1 stop
American Airlines Logo
1:00 pm - 12:59 amONT-DCA
8h 59m2 stops
$304American Airlines
Find Deal
Fri, Oct 3 - Sat, Oct 11
Logo
5:00 pm - 11:29 pmDCA-ONT
9h 29m1 stop
Logo
11:52 am - 9:59 pmONT-DCA
7h 07m1 stop
$311
Find Deal
Mon, Dec 8 - Mon, Dec 15

Frontier flights from Washington, D.C. Reagan-National Airport to Ontario

Our best Frontier deals on Washington, D.C. Reagan-National Airport to Ontario flight tickets
Frontier
Oct 3
DCA7:00 amWashington, D.C. Reagan-National
15h 54m
1 stop
ONT7:54 pmOntario
Oct 5
ONT8:59 pmOntario
12h 11m
1 stop
DCA12:10 pmWashington, D.C. Reagan-National
$143
Find similar
Frontier
Sep 4
DCA1:00 pmWashington, D.C. Reagan-National
21h 23m
1 stop
ONT7:23 amOntario
Sep 5
ONT8:59 pmOntario
17h 00m
1 stop
DCA4:59 pmWashington, D.C. Reagan-National
$167
Find similar
Frontier
Sep 9
DCA7:00 amWashington, D.C. Reagan-National
15h 54m
1 stop
ONT7:54 pmOntario
Sep 14
ONT3:43 pmOntario
17h 27m
1 stop
DCA12:10 pmWashington, D.C. Reagan-National
$168
Find similar

Delta flights from Washington, D.C. Reagan-National Airport to Ontario

Our best Delta deals on Washington, D.C. Reagan-National Airport to Ontario flight tickets
Delta
Sep 16
DCA6:00 amWashington, D.C. Reagan-National
7h 42m
1 stop
ONT10:42 amOntario
Sep 23
ONT11:55 amOntario
6h 49m
1 stop
DCA9:44 pmWashington, D.C. Reagan-National
$277
Find similar
Delta
Sep 11
DCA6:00 amWashington, D.C. Reagan-National
7h 42m
1 stop
ONT10:42 amOntario
Sep 17
ONT11:55 amOntario
6h 49m
1 stop
DCA9:44 pmWashington, D.C. Reagan-National
$278
Find similar
Delta
Oct 4
DCA11:10 amWashington, D.C. Reagan-National
11h 05m
2 stops
ONT7:15 pmOntario
Oct 8
ONT11:36 amOntario
9h 05m
1 stop
DCA11:41 pmWashington, D.C. Reagan-National
$283
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Reagan-National Airport to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 21, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Fri 10/3

7:00 am-7:54 pm

1 stop15h 54m

Ontario

Sun 10/5

8:59 pm-12:10 pm

1 stop12h 11m

$143

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Thu 9/4

1:00 pm-7:23 am

1 stop21h 23m

Ontario

Fri 9/5

8:59 pm-4:59 pm

1 stop17h 00m

$167

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Tue 9/9

7:00 am-7:54 pm

1 stop15h 54m

Ontario

Sun 9/14

3:43 pm-12:10 pm

1 stop17h 27m

$168

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Tue 9/16

7:00 am-7:54 pm

1 stop15h 54m

Ontario

Thu 9/18

8:59 pm-12:10 pm

1 stop12h 11m

$169

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 12/6

6:05 am-11:30 am

1 stop8h 25m

Ontario

Tue 12/16

5:45 am-6:15 pm

2 stops9h 30m

$273

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Tue 9/16

6:00 am-10:42 am

1 stop7h 42m

Ontario

Tue 9/23

11:55 am-9:44 pm

1 stop6h 49m

$277

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Thu 9/11

6:00 am-10:42 am

1 stop7h 42m

Ontario

Wed 9/17

11:55 am-9:44 pm

1 stop6h 49m

$278

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Tue 10/7

3:30 pm-9:25 pm

2 stops8h 55m

Ontario

Sat 10/18

6:45 am-9:50 pm

1 stop12h 05m

$279

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Fri 10/3

5:00 am-11:55 am

1 stop9h 55m

Ontario

Sat 10/11

1:00 pm-12:59 am

2 stops8h 59m

$304

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Mon 12/8

5:00 pm-11:29 pm

1 stop9h 29m

Ontario

Mon 12/15

11:52 am-9:59 pm

1 stop7h 07m

$311

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport 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 cheapest month to fly to Ontario?

In general, November is the cheapest month to fly from Washington, D.C. Reagan-National Airport to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $266. If you aren’t able to travel during the month of November, then book flights to Ontario from Washington, D.C. Reagan-National Airport during September instead. Flights to Ontario in September, while not as cheap as those in November, still average around $278.

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. Reagan-National Airport 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. Reagan-National Airport 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. Reagan-National Airport 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?

You are more likely to see cheaper flights to Ontario from Washington, D.C. Reagan-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $352 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Washington, D.C. Reagan-National Airport for as low as $240 on momondo.

How have Washington, D.C. Reagan-National Airport to Ontario flight prices changed over time?

As of August 2025, prices for Washington, D.C. Reagan-National Airport to Ontario flights are approximately 7% more expensive when compared to flights at the same time last year.

When to book flights from Washington, D.C. Reagan-National Airport to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport 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. Reagan-National Airport to Ontario (DCA to ONT) flight deals and tips

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

Direct flights

None
There are no direct flights from Washington, D.C. Reagan-National Airport to Ontario. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Ontario.
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  • How far is Washington, D.C. Reagan-National to Ontario by plane?

    Washington, D.C. Reagan-National and Ontario are 2260.8 mi apart from one another. By plane, this route typically takes 7h 10m.

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

    Prices for flights from Washington, D.C. Reagan-National Airport to Ontario Airport refresh daily.

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

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

    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 Washington, D.C. Reagan-National Airport 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. Reagan-National Airport to Ontario?

Best airlines flying from Washington, D.C. Reagan-National Airport to Ontario

Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $147Free CancellationRating
5.8
3,207 reviews
Search Frontier flights
DeltaPriceFrom $278Free CancellationRating
7.9
7,981 reviews
Search Delta flights
American AirlinesPriceFrom $296Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $348Free CancellationRating
8.0
4,245 reviews
Search Southwest flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Ontario for you.

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?

momondo provides multiple filters to help you find the best flight to Ontario from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Ontario from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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