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Cheap flights from Washington, D.C. Reagan-National Airport to Los Angeles 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 Washington, D.C. Reagan-National Airport to Los Angeles departing on 3/3. 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 - 9:34 pm
DCA
-
ONT
16h 34m
1 stop
Frontier Logo
7:30 am - 1:15 pm
ONT
-
DCA
26h 45m
1 stop
$148Frontier
Tue, Feb 10 - Wed, Feb 18
Frontier Logo
6:00 pm - 11:59 pm
DCA
-
ONT
8h 59m
1 stop
Frontier Logo
6:00 am - 9:59 pm
ONT
-
DCA
12h 59m
1 stop
$160Frontier
Sat, Feb 21 - Sat, Feb 28
Frontier Logo
2:00 pm - 9:34 pm
DCA
-
ONT
10h 34m
1 stop
Frontier Logo
6:00 am - 9:59 pm
ONT
-
DCA
12h 59m
1 stop
$164Frontier
Wed, Feb 18 - Sat, Feb 21
Frontier Logo
6:00 pm - 11:24 pm
DCA
-
ONT
8h 24m
1 stop
Frontier Logo
8:36 am - 9:59 pm
ONT
-
DCA
10h 23m
1 stop
$167Frontier
Sat, Feb 7 - Tue, Feb 10
Frontier Logo
6:00 pm - 9:34 pm
DCA
-
ONT
30h 34m
1 stop
Frontier Logo
6:00 am - 9:59 pm
ONT
-
DCA
12h 59m
1 stop
$171Frontier
Mon, Feb 23 - Sat, Feb 28
Frontier Logo
2:00 pm - 9:34 pm
DCA
-
ONT
10h 34m
1 stop
Frontier Logo
6:05 am - 4:59 pm
ONT
-
DCA
7h 54m
1 stop
$174Frontier
Wed, Feb 18 - Thu, Feb 26
Frontier Logo
6:00 pm - 7:59 am
DCA
-
ONT
16h 59m
1 stop
Frontier Logo
7:30 am - 1:15 pm
ONT
-
DCA
26h 45m
1 stop
$176Frontier
Sat, Feb 14 - Wed, Feb 18
Frontier Logo
8:00 am - 11:59 pm
DCA
-
ONT
18h 59m
1 stop
Frontier Logo
8:35 am - 1:15 pm
ONT
-
DCA
25h 40m
1 stop
$178Frontier
Thu, Feb 19 - Tue, Feb 24
Frontier Logo
8:00 am - 9:34 pm
DCA
-
ONT
16h 34m
1 stop
Frontier Logo
6:15 am - 9:59 pm
ONT
-
DCA
12h 44m
1 stop
$179Frontier
Wed, Mar 4 - Wed, Mar 11
Frontier Logo
6:00 pm - 11:59 pm
DCA
-
ONT
8h 59m
1 stop
Frontier Logo
6:00 am - 9:59 pm
ONT
-
DCA
12h 59m
1 stop
$180Frontier
Sat, Feb 21 - Sat, Feb 28

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
Feb 10
DCA8:00 amWashington, D.C. Reagan-National
16h 34m
1 stop
ONT9:34 pmOntario
Feb 18
ONT7:30 amOntario
26h 45m
1 stop
DCA1:15 pmWashington, D.C. Reagan-National
$148
Frontier
Feb 21
DCA6:00 pmWashington, D.C. Reagan-National
8h 59m
1 stop
ONT11:59 pmOntario
Feb 28
ONT6:00 amOntario
12h 59m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
$160
Frontier
Feb 4
DCA8:59 amWashington, D.C. Reagan-National
9h 08m
1 stop
ONT3:07 pmOntario
Feb 11
ONT8:10 amOntario
7h 49m
1 stop
DCA6:59 pmWashington, D.C. Reagan-National
$164

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 January 22, 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

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Tue 2/10

8:00 am-9:34 pm

1 stop16h 34m

Ontario

Wed 2/18

7:30 am-1:15 pm

1 stop26h 45m

$148

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 2/21

6:00 pm-11:59 pm

1 stop8h 59m

Ontario

Sat 2/28

6:00 am-9:59 pm

1 stop12h 59m

$160

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 2/18

2:00 pm-9:34 pm

1 stop10h 34m

Ontario

Sat 2/21

6:00 am-9:59 pm

1 stop12h 59m

$164

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 2/7

6:00 pm-11:24 pm

1 stop8h 24m

Ontario

Tue 2/10

8:36 am-9:59 pm

1 stop10h 23m

$167

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Mon 2/23

6:00 pm-9:34 pm

1 stop30h 34m

Ontario

Sat 2/28

6:00 am-9:59 pm

1 stop12h 59m

$171

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 2/18

2:00 pm-9:34 pm

1 stop10h 34m

Ontario

Thu 2/26

6:05 am-4:59 pm

1 stop7h 54m

$174

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 2/14

6:00 pm-7:59 am

1 stop16h 59m

Ontario

Wed 2/18

7:30 am-1:15 pm

1 stop26h 45m

$176

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Thu 2/19

8:00 am-11:59 pm

1 stop18h 59m

Ontario

Tue 2/24

8:35 am-1:15 pm

1 stop25h 40m

$178

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 3/4

8:00 am-9:34 pm

1 stop16h 34m

Ontario

Wed 3/11

6:15 am-9:59 pm

1 stop12h 44m

$179

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 2/21

6:00 pm-11:59 pm

1 stop8h 59m

Ontario

Sat 2/28

6:00 am-9:59 pm

1 stop12h 59m

$180

Flights are sorted by cheapest round-trip flights 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, February 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 $252. If you aren’t able to travel during the month of February, 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 February, still average around $297.

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

As of January 2026, prices for Washington, D.C. Reagan-National Airport to Ontario flights are approximately 49% cheaper 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

7h 16m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to Ontario takes 7h 16m
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 7h 16m.

  • 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 $178Free CancellationRating
5.7
3,057 reviews
Search Frontier flights
American AirlinesPriceFrom $256Free CancellationRating
7.2
11,174 reviews
Search American Airlines flights
SouthwestPriceFrom $361Free CancellationRating
8.0
4,266 reviews
Search Southwest flights

  • Southwest Flights From Washington, D.C. Reagan-National Airport to Ontario

    The lowest priced Southwest flight from Washington, D.C. Reagan-National Airport to Ontario from the last 72 hours was $361. Generally, Southwest has 5 flights on this route every week with an average price of $448. Southwest is rated 8.0/10 by our users.

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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