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Cheap flights from Washington, D.C. Reagan-National Airport to Los Angeles from $149

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
6:00 pm - 11:51 pmDCA  Washington, D.C. Reagan-National-ONT Ontario
8h 51m1 stop Denver Intl
Frontier Logo
11:52 am - 9:50 pmONT  Ontario-DCA Washington, D.C. Reagan-National
6h 58m1 stop Denver Intl
$149Frontier
Tue, Nov 3 - Fri, Nov 6
Frontier Logo
1:40 pm - 10:17 pmDCA  Washington, D.C. Reagan-National-ONT Ontario
11h 37m1 stop Denver Intl
Frontier Logo
6:00 am - 9:59 pmONT  Ontario-DCA Washington, D.C. Reagan-National
12h 59m1 stop Denver Intl
$200Frontier
Sat, Dec 5 - Wed, Dec 9
Multiple Airlines Logo
1:00 pm - 10:42 amDCA  Washington, D.C. Reagan-National-ONT Ontario
24h 42m1 stop Denver Intl
Multiple Airlines Logo
7:13 pm - 4:20 pmONT  Ontario-DCA Washington, D.C. Reagan-National
18h 07m1 stop Seattle/Tacoma Intl
$313Multiple Airlines
Thu, Oct 29 - Mon, Nov 2
Multiple Airlines Logo
7:00 am - 10:17 pmDCA  Washington, D.C. Reagan-National-ONT Ontario
18h 17m1 stop Denver Intl
Multiple Airlines Logo
7:00 am - 9:59 pmONT  Ontario-DCA Washington, D.C. Reagan-National
11h 59m1 stop Seattle/Tacoma Intl
$313Multiple Airlines
Wed, Dec 16 - Wed, Jan 27
American Airlines Logo
6:59 am - 1:30 pmDCA  Washington, D.C. Reagan-National-ONT Ontario
9h 31m1 stop Dallas/Fort Worth
American Airlines Logo
6:00 am - 7:00 pmONT  Ontario-DCA Washington, D.C. Reagan-National
10h 00m1 stop Dallas/Fort Worth
$351American Airlines
Tue, Oct 27 - Sat, Oct 31
Delta Logo
6:00 am - 11:27 amDCA  Washington, D.C. Reagan-National-ONT Ontario
8h 27m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:00 pm - 10:15 pmONT  Ontario-DCA Washington, D.C. Reagan-National
7h 15m1 stop Atlanta Hartsfield-Jackson
$351Delta
Tue, Jan 12 - Thu, Jan 21
Delta Logo
2:00 pm - 7:55 pmDCA  Washington, D.C. Reagan-National-ONT Ontario
8h 55m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:00 am - 4:48 pmONT  Ontario-DCA Washington, D.C. Reagan-National
7h 48m1 stop Salt Lake City
$351Delta
Sat, Dec 5 - Thu, Dec 10
Southwest Logo
6:10 am - 11:55 amDCA  Washington, D.C. Reagan-National-ONT Ontario
8h 45m2 stops Dallas Love Field Las Vegas Harry Reid Intl
Southwest Logo
6:45 am - 4:30 pmONT  Ontario-DCA Washington, D.C. Reagan-National
6h 45m1 stop Chicago Midway
$356Southwest
Wed, Dec 16 - Wed, Jan 27
American Airlines Logo
5:00 am - 9:35 amDCA  Washington, D.C. Reagan-National-ONT Ontario
7h 35m1 stop Dallas/Fort Worth
American Airlines Logo
10:25 am - 9:45 pmONT  Ontario-DCA Washington, D.C. Reagan-National
8h 20m1 stop Dallas/Fort Worth
$361American Airlines
Tue, Oct 13 - Sat, Oct 17
Southwest Logo
6:10 am - 12:10 pmDCA  Washington, D.C. Reagan-National-ONT Ontario
9h 00m2 stops Dallas Love Field Phoenix Sky Harbor Intl
Southwest Logo
12:00 pm - 11:45 pmONT  Ontario-DCA Washington, D.C. Reagan-National
8h 45m2 stops Phoenix Sky Harbor Intl Chicago Midway
$361Southwest
Wed, Dec 16 - Wed, Jan 27

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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 29
DCA1:00 pmWashington, D.C. Reagan-National
24h 42m
1 stop
ONT10:42 amOntario
Nov 4
ONT6:25 amOntario
12h 25m
1 stop
DCA9:50 pmWashington, D.C. Reagan-National
$248
Frontier
Oct 24
DCA1:00 pmWashington, D.C. Reagan-National
13h 50m
1 stop
ONT11:50 pmOntario
Oct 26
ONT11:52 amOntario
7h 07m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
$252
Frontier
Oct 24
DCA6:00 pmWashington, D.C. Reagan-National
8h 50m
1 stop
ONT11:50 pmOntario
Oct 31
ONT6:25 amOntario
7h 22m
1 stop
DCA4:47 pmWashington, D.C. Reagan-National
$253

momondo Fare Finder

 
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Ontario that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Ontario

DCA Washington, D.C. Reagan-National - ONT Ontario

DCAONT

Washington, D.C. Reagan-National

Tue 11/3

6:00 pm-11:51 pm

1 stop8h 51m

Ontario

Fri 11/6

11:52 am-9:50 pm

1 stop6h 58m

$149

Washington, D.C.Ontario

DCA Washington, D.C. Reagan-National - ONT Ontario

DCAONT

Washington, D.C. Reagan-National

Sat 12/5

1:40 pm-10:17 pm

1 stop11h 37m

Ontario

Wed 12/9

6:00 am-9:59 pm

1 stop12h 59m

$200

Washington, D.C.Ontario

DCA Washington, D.C. Reagan-National - ONT Ontario

DCAONT

Washington, D.C. Reagan-National

Thu 10/29

1:00 pm-10:42 am

1 stop24h 42m

Ontario

Mon 11/2

7:13 pm-4:20 pm

1 stop18h 07m

$313

Washington, D.C.Ontario

DCA Washington, D.C. Reagan-National - ONT Ontario

DCAONT

Washington, D.C. Reagan-National

Wed 12/16

7:00 am-10:17 pm

1 stop18h 17m

Ontario

Wed 1/27

7:00 am-9:59 pm

1 stop11h 59m

$313

Washington, D.C.Ontario

DCA Washington, D.C. Reagan-National - ONT Ontario

DCAONT

Washington, D.C. Reagan-National

Tue 10/27

6:59 am-1:30 pm

1 stop9h 31m

Ontario

Sat 10/31

6:00 am-7:00 pm

1 stop10h 00m

$351

Washington, D.C.Ontario

DCA Washington, D.C. Reagan-National - ONT Ontario

DCAONT

Washington, D.C. Reagan-National

Tue 1/12

6:00 am-11:27 am

1 stop8h 27m

Ontario

Thu 1/21

12:00 pm-10:15 pm

1 stop7h 15m

$351

Washington, D.C.Ontario

DCA Washington, D.C. Reagan-National - ONT Ontario

DCAONT

Washington, D.C. Reagan-National

Sat 12/5

2:00 pm-7:55 pm

1 stop8h 55m

Ontario

Thu 12/10

6:00 am-4:48 pm

1 stop7h 48m

$351
Quickest round-trip

Washington, D.C.Ontario

DCA Washington, D.C. Reagan-National - ONT Ontario

DCAONT

Washington, D.C. Reagan-National

Wed 12/16

6:10 am-11:55 am

2 stops8h 45m

Ontario

Wed 1/27

6:45 am-4:30 pm

1 stop6h 45m

$356

Washington, D.C.Ontario

DCA Washington, D.C. Reagan-National - ONT Ontario

DCAONT

Washington, D.C. Reagan-National

Tue 10/13

5:00 am-9:35 am

1 stop7h 35m

Ontario

Sat 10/17

10:25 am-9:45 pm

1 stop8h 20m

$361

Washington, D.C.Ontario

DCA Washington, D.C. Reagan-National - ONT Ontario

DCAONT

Washington, D.C. Reagan-National

Wed 12/16

6:10 am-12:10 pm

2 stops9h 00m

Ontario

Wed 1/27

12:00 pm-11:45 pm

2 stops8h 45m

$361

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 typical price of a round-trip flight between Washington, D.C. Reagan-National Airport and Ontario?

Prices are currently low for flights on this route.

Typical prices usually range from $298 to $592.
The lowest price recently found on this route was $248.

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 $350. 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 February instead. Flights to Ontario in February, while not as cheap as those in January, still average around $388.

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

As of September 2026, prices for Washington, D.C. Reagan-National Airport to Ontario flights are approximately 70% 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

Best Price Found

$151

Fastest flight time

8h 14m

Direct flights

None
The best one-way flight to Ontario from Washington, D.C. Reagan-National Airport in the past 72 hours is $151. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Ontario found on momondo in the last 72 hours is $149.
The fastest flight from Washington, D.C. Reagan-National Airport to Ontario takes 8h 14m
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

Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to Ontario

  • 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 8h 14m.

  • 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 $165Free CancellationRating
5.6
2,579 reviews
Search Frontier flights
DeltaPriceFrom $257Free CancellationRating
7.8
8,594 reviews
Search Delta flights
SouthwestPriceFrom $326Free CancellationRating
8.0
4,196 reviews
Search Southwest flights
American AirlinesPriceFrom $350Free CancellationRating
7.0
12,075 reviews
Search American Airlines 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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