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Cheap flights from Ontario to Washington, D.C. from $92

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Washington, D.C. departing on 9/13. 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 Ontario to Washington, D.C.

Cheap round-trip flights

Southwest Logo
8:45 am - 8:25 pmONT-DCA
8h 40m1 stop
Southwest Logo
4:55 pm - 8:45 pmDCA-ONT
6h 50m1 stop
$183Southwest
Find Deal
Sat, Sep 13 - Wed, Sep 17
Southwest Logo
11:55 am - 11:10 pmONT-DCA
8h 15m1 stop
Southwest Logo
3:15 pm - 7:35 pmDCA-ONT
7h 20m1 stop
$186Southwest
Find Deal
Wed, Aug 6 - Wed, Aug 13
American Airlines Logo
10:53 am - 11:00 pmONT-DCA
9h 07m1 stop
American Airlines Logo
6:45 am - 1:54 pmDCA-ONT
10h 09m1 stop
$189American Airlines
Find Deal
Sat, Sep 20 - Sat, Sep 27
American Airlines Logo
12:45 pm - 11:00 pmONT-DCA
7h 15m1 stop
American Airlines Logo
11:59 am - 6:54 pmDCA-ONT
9h 55m2 stops
$194American Airlines
Find Deal
Sat, Sep 20 - Sat, Sep 27
United Airlines Logo
7:00 am - 4:56 pmONT-DCA
6h 56m1 stop
United Airlines Logo
4:34 pm - 9:35 pmDCA-ONT
8h 01m1 stop
$235United Airlines
Find Deal
Wed, Oct 29 - Mon, Nov 3
United Airlines Logo
7:00 am - 7:02 pmONT-DCA
9h 02m1 stop
United Airlines Logo
4:59 pm - 9:37 pmDCA-ONT
7h 38m1 stop
$237United Airlines
Find Deal
Fri, Aug 15 - Sun, Aug 17
Delta Logo
10:05 pm - 9:09 amONT-DCA
8h 04m1 stop
Delta Logo
6:00 am - 10:35 amDCA-ONT
7h 35m1 stop
$277Delta
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Fri, Aug 8 - Sat, Aug 16
Frontier Logo
12:59 am - 12:04 pmONT-DCA
8h 05m1 stop
Frontier Logo
6:00 pm - 11:50 pmDCA-ONT
8h 50m1 stop
$279Frontier
Find Deal
Sat, Aug 9 - Wed, Aug 13
Delta Logo
11:40 am - 11:42 pmONT-DCA
9h 02m1 stop
Delta Logo
3:40 pm - 11:40 pmDCA-ONT
11h 00m2 stops
$282Delta
Find Deal
Fri, Aug 8 - Fri, Aug 15
Frontier Logo
12:59 am - 12:04 pmONT-DCA
8h 05m1 stop
Frontier Logo
6:00 pm - 11:50 pmDCA-ONT
8h 50m1 stop
$297Frontier
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Wed, Oct 22 - Tue, Oct 28

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

Our best Southwest deals on Ontario to Washington, D.C. Reagan-National Airport flight tickets
Southwest
Sep 13
ONT8:45 amOntario
8h 40m
1 stop
DCA8:25 pmWashington, D.C. Reagan-National
Sep 17
DCA4:55 pmWashington, D.C. Reagan-National
6h 50m
1 stop
ONT8:45 pmOntario
$183
Find similar
Southwest
Aug 6
ONT11:55 amOntario
8h 15m
1 stop
DCA11:10 pmWashington, D.C. Reagan-National
Aug 13
DCA3:15 pmWashington, D.C. Reagan-National
7h 20m
1 stop
ONT7:35 pmOntario
$186
Find similar
Southwest
Sep 13
ONT8:45 amOntario
8h 40m
1 stop
DCA8:25 pmWashington, D.C. Reagan-National
Sep 17
DCA10:55 amWashington, D.C. Reagan-National
8h 50m
2 stops
ONT4:45 pmOntario
$188
Find similar

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

Our best American Airlines deals on Ontario to Washington, D.C. Reagan-National Airport flight tickets
American Airlines
Sep 20
ONT10:53 amOntario
9h 07m
1 stop
DCA11:00 pmWashington, D.C. Reagan-National
Sep 27
DCA6:45 amWashington, D.C. Reagan-National
10h 09m
1 stop
ONT1:54 pmOntario
$189
Find similar
American Airlines
Sep 20
ONT12:45 pmOntario
7h 15m
1 stop
DCA11:00 pmWashington, D.C. Reagan-National
Sep 27
DCA11:59 amWashington, D.C. Reagan-National
9h 55m
2 stops
ONT6:54 pmOntario
$194
Find similar
American Airlines
Sep 20
ONT1:10 pmOntario
8h 50m
2 stops
DCA1:00 amWashington, D.C. Reagan-National
Sep 27
DCA11:59 amWashington, D.C. Reagan-National
9h 55m
2 stops
ONT6:54 pmOntario
$199
Find similar

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Ontario to Washington, D.C. Reagan-National Airport

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 Washington, D.C. Reagan-National Airport?

The month of February is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Ontario, with most prices found around $326. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $334.

What is the cheapest day to depart on your flight to Washington, D.C. Reagan-National Airport?

The cheapest day to depart from Ontario to Washington, D.C. Reagan-National Airport is on a Wednesday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Wednesday will often find tickets for as low as $399. Flights from Ontario to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $588. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Washington, D.C. Reagan-National Airport?

Our data shows that the cheapest Ontario to Washington, D.C. Reagan-National Airport flights are usually those with departure times in the afternoon. Our users have found flights to Washington, D.C. Reagan-National Airport in the afternoon for as low as $188. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is in the morning when prices are around $466.

How far in advance should I book a flight to Washington, D.C. Reagan-National Airport?

You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around $388 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from Ontario for as low as $321 on momondo.

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

As of July 2025, prices for Ontario to Washington, D.C. Reagan-National Airport flights are approximately 17% cheaper when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Washington, D.C. Reagan-National Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Washington, D.C. Reagan-National Airport (ONT to DCA) flight deals and tips

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

Best Price Found

$92

Fastest flight time

6h 30m

Direct flights

None
The best one-way flight to Washington, D.C. Reagan-National Airport from Ontario in the past 72 hours is $92. The best round-trip flight deal from Ontario to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is $183.
The fastest flight from Ontario to Washington, D.C. Reagan-National Airport takes 6h 30m
There are no direct flights from Ontario to Washington, D.C. Reagan-National Airport. Popular non-direct route for this connection is Ontario Airport - Washington, D.C. Reagan-National Airport.
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  • How far is Ontario to Washington, D.C. Reagan-National by plane?

    The distance between Ontario and Washington, D.C. Reagan-National is about 2260.8 mi. A reasonable flight in good conditions will take 6h 30m.

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

    Prices for flights from Ontario Airport to Washington, D.C. Reagan-National Airport were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The required travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Ontario to Washington, D.C. Reagan-National Airport?

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

Compare and see reviews for airlines that fly from Ontario to Washington, D.C. Reagan-National Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $147Free CancellationRating
5.9
3,271 reviews
Search Frontier flights
DeltaPriceFrom $286Free CancellationRating
8.0
7,952 reviews
Search Delta flights
SouthwestPriceFrom $298Free CancellationRating
8.0
4,250 reviews
Search Southwest flights
American AirlinesPriceFrom $316Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $322Free CancellationRating
7.4
8,846 reviews
Search United Airlines flights

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Gettysburg
Arlington
National Harbor
Laurel
Woodbridge
Tysons
Silver Spring
Waldorf
Fredericksburg
Manassas
Gaithersburg
Rockville
Towson
Fairfax
Colonial Beach
Glen Burnie
Linthicum Heights
Reston
Springfield

Why use momondo?

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

It is quick and easy to find Ontario to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from Ontario to Washington, D.C. with flexible booking policies on momondo?

All flight searches from Ontario to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Washington, D.C.?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Washington, D.C..

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

If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Ontario and alert you when they change.

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