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Cheap flights from Washington, D.C. Reagan-National Airport to Los Angeles from $79

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 4/15. 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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:00 am - 7:31 am
DCA
-
ONT
26h 31m
1 stop
Frontier Logo
5:33 pm - 1:00 pm
ONT
-
DCA
16h 27m
1 stop
$160Frontier
Wed, Apr 15 - Fri, Apr 17
Frontier Logo
8:00 am - 11:55 pm
DCA
-
ONT
18h 55m
1 stop
Frontier Logo
12:59 am - 4:59 pm
ONT
-
DCA
13h 00m
1 stop
$161Frontier
Sat, Apr 18 - Thu, Apr 23
Frontier Logo
8:00 am - 11:55 pm
DCA
-
ONT
18h 55m
1 stop
Frontier Logo
12:59 am - 9:59 pm
ONT
-
DCA
18h 00m
1 stop
$162Frontier
Wed, Apr 15 - Mon, Apr 20
Frontier Logo
8:00 am - 11:55 pm
DCA
-
ONT
18h 55m
1 stop
Frontier Logo
12:59 am - 1:00 pm
ONT
-
DCA
9h 01m
1 stop
$166Frontier
Sat, Apr 18 - Wed, Apr 29
Frontier Logo
6:00 pm - 11:55 pm
DCA
-
ONT
8h 55m
1 stop
Frontier Logo
12:59 am - 9:59 pm
ONT
-
DCA
18h 00m
1 stop
$167Frontier
Wed, Apr 15 - Fri, Apr 17
Frontier Logo
8:00 am - 7:31 am
DCA
-
ONT
26h 31m
1 stop
Frontier Logo
12:59 am - 1:00 pm
ONT
-
DCA
9h 01m
1 stop
$170Frontier
Sun, Apr 26 - Fri, May 1
Frontier Logo
8:00 am - 7:26 am
DCA
-
ONT
26h 26m
1 stop
Frontier Logo
12:59 am - 1:00 pm
ONT
-
DCA
9h 01m
1 stop
$171Frontier
Sat, Apr 18 - Fri, Apr 24
Frontier Logo
8:00 am - 11:55 pm
DCA
-
ONT
18h 55m
1 stop
Frontier Logo
12:59 am - 9:59 pm
ONT
-
DCA
18h 00m
1 stop
$172Frontier
Tue, Apr 21 - Thu, Apr 23
Frontier Logo
6:00 pm - 11:55 pm
DCA
-
ONT
8h 55m
1 stop
Frontier Logo
5:33 pm - 9:59 pm
ONT
-
DCA
25h 26m
1 stop
$174Frontier
Wed, Apr 15 - Fri, Apr 17
Frontier Logo
1:59 pm - 11:49 pm
DCA
-
ONT
12h 50m
1 stop
Frontier Logo
6:00 am - 9:58 pm
ONT
-
DCA
12h 58m
1 stop
$185Frontier
Sat, May 9 - Sat, May 16

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
Apr 15
DCA8:00 amWashington, D.C. Reagan-National
26h 31m
1 stop
ONT7:31 amOntario
Apr 24
ONT12:59 amOntario
9h 01m
1 stop
DCA1:00 pmWashington, D.C. Reagan-National
$160
Frontier
Apr 18
DCA8:00 amWashington, D.C. Reagan-National
18h 55m
1 stop
ONT11:55 pmOntario
Apr 23
ONT12:59 amOntario
13h 00m
1 stop
DCA4:59 pmWashington, D.C. Reagan-National
$161
Frontier
Apr 15
DCA8:00 amWashington, D.C. Reagan-National
18h 55m
1 stop
ONT11:55 pmOntario
Apr 20
ONT12:59 amOntario
18h 00m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
$162

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 March 24, 2026.
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

Cheapest round-trip

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 4/15

8:00 am-7:31 am

1 stop26h 31m

Ontario

Fri 4/17

5:33 pm-1:00 pm

1 stop16h 27m

$160

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 4/18

8:00 am-11:55 pm

1 stop18h 55m

Ontario

Thu 4/23

12:59 am-4:59 pm

1 stop13h 00m

$161

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 4/15

8:00 am-11:55 pm

1 stop18h 55m

Ontario

Mon 4/20

12:59 am-9:59 pm

1 stop18h 00m

$162

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 4/18

8:00 am-11:55 pm

1 stop18h 55m

Ontario

Wed 4/29

12:59 am-1:00 pm

1 stop9h 01m

$166

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 4/15

6:00 pm-11:55 pm

1 stop8h 55m

Ontario

Fri 4/17

12:59 am-9:59 pm

1 stop18h 00m

$167

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sun 4/26

8:00 am-7:31 am

1 stop26h 31m

Ontario

Fri 5/1

12:59 am-1:00 pm

1 stop9h 01m

$170

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 4/18

8:00 am-7:26 am

1 stop26h 26m

Ontario

Fri 4/24

12:59 am-1:00 pm

1 stop9h 01m

$171

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Tue 4/21

8:00 am-11:55 pm

1 stop18h 55m

Ontario

Thu 4/23

12:59 am-9:59 pm

1 stop18h 00m

$172

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 4/15

6:00 pm-11:55 pm

1 stop8h 55m

Ontario

Fri 4/17

5:33 pm-9:59 pm

1 stop25h 26m

$174
Quickest round-trip

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 5/9

1:59 pm-11:49 pm

1 stop12h 50m

Ontario

Sat 5/16

6:00 am-9:58 pm

1 stop12h 58m

$185

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, January 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 $264. If you aren’t able to travel during the month of January, 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 January, still average around $297.

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

As of March 2026, prices for Washington, D.C. Reagan-National Airport to Ontario flights are approximately 15% 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

Fastest flight time

6h 45m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to Ontario takes 6h 45m
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.
Search flight deals

  • 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 6h 45m.

  • 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 $176Free CancellationRating
5.7
3,017 reviews
Search Frontier flights
American AirlinesPriceFrom $256Free CancellationRating
7.1
11,492 reviews
Search American Airlines flights
SouthwestPriceFrom $361Free CancellationRating
8.0
4,331 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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