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Cheap flights from Washington, D.C. Reagan-National Airport to Ontario from $88

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 Ontario departing on 4/29. 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

KAYAK's recommended round-trip deals from the most popular airlines that fly from Washington, D.C. Reagan-National Airport to Los Angeles.
Frontier Logo
6:00 pm - 11:59 pmDCA-ONT
8h 59m1 stop
Frontier Logo
12:59 am - 12:07 pmONT-DCA
8h 08m1 stop
$176Frontier
Find Deal
sáb., may. 17 - vie., may. 23
Frontier Logo
6:00 pm - 11:08 pmDCA-ONT
8h 08m1 stop
Frontier Logo
12:59 am - 4:59 pmONT-DCA
13h 00m1 stop
$178Frontier
Find Deal
mié., may. 7 - vie., may. 9
Delta Logo
5:15 pm - 10:16 pmDCA-ONT
8h 01m1 stop
Delta Logo
10:00 pm - 9:08 amONT-DCA
8h 08m1 stop
$327Delta
Find Deal
sáb., may. 24 - lun., jun. 2
Delta Logo
2:55 pm - 11:42 pmDCA-ONT
11h 47m2 stops
Delta Logo
10:05 pm - 11:00 amONT-DCA
9h 55m1 stop
$332Delta
Find Deal
mar., jun. 3 - lun., jun. 9
American Airlines Logo
6:59 pm - 11:43 pmDCA-ONT
7h 44m1 stop
American Airlines Logo
7:25 pm - 7:00 amONT-DCA
8h 35m1 stop
$372American Airlines
Find Deal
vie., may. 23 - lun., may. 26
American Airlines Logo
1:44 pm - 9:05 pmDCA-ONT
10h 21m1 stop
American Airlines Logo
10:40 pm - 9:28 amONT-DCA
7h 48m1 stop
$417American Airlines
Find Deal
vie., may. 23 - dom., jun. 1
United Airlines Logo
4:45 pm - 9:10 pmDCA-ONT
7h 25m1 stop
United Airlines Logo
7:00 am - 5:59 pmONT-DCA
7h 59m1 stop
$422United Airlines
Find Deal
lun., jun. 2 - sáb., jun. 7
United Airlines Logo
2:56 pm - 9:10 pmDCA-ONT
9h 14m1 stop
United Airlines Logo
6:00 am - 6:45 pmONT-DCA
9h 45m1 stop
$427United Airlines
Find Deal
mié., jun. 18 - mié., jul. 2
Southwest Logo
6:05 am - 3:55 pmDCA-ONT
12h 50m2 stops
Southwest Logo
5:10 am - 3:55 pmONT-DCA
7h 45m1 stop
$464Southwest
Find Deal
jue., jun. 26 - dom., jul. 27
Southwest Logo
6:05 am - 3:55 pmDCA-ONT
12h 50m2 stops
Southwest Logo
10:30 am - 10:20 pmONT-DCA
8h 50m2 stops
$469Southwest
Find Deal
jue., jun. 26 - dom., jul. 27

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
May 24
DCA5:15 pmWashington, D.C. Reagan-National
8h 01m
1 stop
ONT10:16 pmOntario
Jun 2
ONT10:00 pmOntario
8h 08m
1 stop
DCA9:08 amWashington, D.C. Reagan-National
Delta
Jun 3
DCA2:55 pmWashington, D.C. Reagan-National
11h 47m
2 stops
ONT11:42 pmOntario
Jun 9
ONT10:05 pmOntario
9h 55m
1 stop
DCA11:00 amWashington, D.C. Reagan-National
Delta
Jun 3
DCA4:00 pmWashington, D.C. Reagan-National
9h 29m
2 stops
ONT10:29 pmOntario
Jun 9
ONT10:05 pmOntario
10h 23m
2 stops
DCA11:28 amWashington, D.C. Reagan-National

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

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to Ontario flight tickets
United Airlines
Jun 2
DCA4:45 pmWashington, D.C. Reagan-National
7h 25m
1 stop
ONT9:10 pmOntario
Jun 7
ONT7:00 amOntario
7h 59m
1 stop
DCA5:59 pmWashington, D.C. Reagan-National
United Airlines
Jun 18
DCA2:56 pmWashington, D.C. Reagan-National
9h 14m
1 stop
ONT9:10 pmOntario
Jul 2
ONT6:00 amOntario
9h 45m
1 stop
DCA6:45 pmWashington, D.C. Reagan-National
United Airlines
Jun 11
DCA3:30 pmWashington, D.C. Reagan-National
9h 56m
1 stop
ONT10:26 pmOntario
Jun 14
ONT6:00 amOntario
10h 00m
1 stop
DCA7:00 pmWashington, D.C. Reagan-National

See travel insights to Los Angeles from

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 February instead. Flights to Ontario in February, while not as cheap as those in November, still average around $289.

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 5 weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $357 when searching 5 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 $269 on momondo.

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

As of April 2025, prices for Washington, D.C. Reagan-National Airport to Ontario flights are approximately 21% 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

Best Price Found

$88

Fastest flight time

7h 08m

Direct flights

None

Airports in Ontario

1 airport
The best one-way flight to Ontario from Washington, D.C. Reagan-National Airport in the past 72 hours is $88. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Ontario found on momondo in the last 72 hours is $176.
The fastest flight from Washington, D.C. Reagan-National Airport to Ontario takes 7h 08m
There are no direct flights from Washington, D.C. Reagan-National Airport to Ontario. Popular non-direct route for this connection is Washington, D.C. Reagan-National Airport - Ontario Airport.
There is 1 airport near Ontario: Ontario (ONT)

  • 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 08m.

  • 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 $150Free CancellationRating
5.9
3,283 reviews
Search Frontier flights
United AirlinesPriceFrom $195Free CancellationRating
7.4
8,685 reviews
Search United Airlines flights
DeltaPriceFrom $289Free CancellationRating
8.0
7,919 reviews
Search Delta flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $348Free CancellationRating
8.0
4,287 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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