Which layover airport offers the lowest fares from Ontario to Washington, D.C. Reagan-National Airport?

Flights via Denver (DEN) offer the lowest average round-trip price of $277.

Which layover airport has the shortest travel time from Ontario to Washington, D.C. Reagan-National Airport?

Flights connecting via Chicago (MDW) have the shortest average one-way travel time: 6h 30m.

What is the cheapest airline that flies from Ontario to Washington, D.C. Reagan-National?

United Airlines, Southwest, and Delta are the most popular carriers operating from Ontario to Washington, D.C. Reagan-National

What airlines fly to Washington, D.C. Reagan-National Airport?

American Airlines, Delta and Alaska Airlines are the top three most popular airlines that fly to Washington, D.C. Reagan-National Airport from Ontario according to our data. American Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Washington, D.C. Reagan-National Airport. Keep in mind that there are 9 different airlines that fly to Washington, D.C. Reagan-National Airport on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between Ontario and Washington, D.C. Reagan-National Airport?

Denver (DEN) was the most common stop: 89% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Ontario to Washington, D.C. Reagan-National Airport?

Chicago (MDW) has the shortest average layover time for this route: 1h 28m.

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?

The number of operators available for flights from Ontario Airport to Washington, D.C. Reagan-National Airport is 5 as of February 2026.

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.

$65 Cheap Flights from Ontario to Washington, D.C. Reagan-National Airport in 2026

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Enter your travel dates to find the best prices.

8:40 am - 9:59 pm

ONT

DCA

10h 19m

1 stop

8:00 am - 11:59 pm

DCA

ONT

18h 59m

1 stop

$185Frontier

Tue, Mar 3 - Tue, Mar 10

6:05 am - 4:59 pm

ONT

DCA

7h 54m

1 stop

6:00 pm - 11:59 pm

DCA

ONT

8h 59m

1 stop

$188Frontier

Thu, Mar 5 - Wed, Mar 11

6:10 am - 4:59 pm

ONT

DCA

7h 49m

1 stop

2:00 pm - 9:34 pm

DCA

ONT

10h 34m

1 stop

$194Frontier

Mon, Mar 2 - Wed, Mar 4

6:10 am - 4:59 pm

ONT

DCA

7h 49m

1 stop

2:00 pm - 9:34 pm

DCA

ONT

10h 34m

1 stop

$195Frontier

Mon, Mar 2 - Wed, Mar 4

5:33 pm - 1:00 pm

ONT

DCA

16h 27m

1 stop

1:59 pm - 7:31 am

DCA

ONT

20h 32m

1 stop

$199Frontier

Fri, May 8 - Sun, May 10

12:59 am - 1:00 pm

ONT

DCA

9h 01m

1 stop

1:59 pm - 11:55 pm

DCA

ONT

12h 56m

1 stop

$200Frontier

Wed, Apr 15 - Fri, May 8

6:10 am - 1:00 pm

ONT

DCA

27h 50m

1 stop

2:00 pm - 9:34 pm

DCA

ONT

10h 34m

1 stop

$201Frontier

Sun, Mar 1 - Tue, Mar 3

6:05 am - 4:59 pm

ONT

DCA

7h 54m

1 stop

6:00 pm - 11:59 pm

DCA

ONT

8h 59m

1 stop

$202Frontier

Thu, Mar 5 - Wed, Mar 11

6:20 am - 12:02 pm

ONT

DCA

26h 42m

1 stop

6:00 pm - 11:56 pm

DCA

ONT

8h 56m

1 stop

$207Frontier

Fri, Apr 10 - Mon, Apr 13

6:00 am - 9:59 pm

ONT

DCA

12h 59m

1 stop

2:00 pm - 11:59 pm

DCA

ONT

12h 59m

1 stop

$209Frontier

Sat, Feb 28 - Thu, Mar 5

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

Our best Frontier deals on Ontario to Washington, D.C. Reagan-National Airport flight tickets

Frontier

Mar 3

ONT8:40 amOntario

10h 19m

1 stop

DCA9:59 pmWashington, D.C. Reagan-National

Mar 10

DCA8:00 amWashington, D.C. Reagan-National

18h 59m

1 stop

ONT11:59 pmOntario

$185

Frontier

Mar 5

ONT6:05 amOntario

7h 54m

1 stop

DCA4:59 pmWashington, D.C. Reagan-National

Mar 11

DCA6:00 pmWashington, D.C. Reagan-National

8h 59m

1 stop

ONT11:59 pmOntario

$188

Frontier

Mar 2

ONT6:10 amOntario

7h 49m

1 stop

DCA4:59 pmWashington, D.C. Reagan-National

Mar 4

DCA2:00 pmWashington, D.C. Reagan-National

10h 34m

1 stop

ONT9:34 pmOntario

$194

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 3/3

8:40 am-9:59 pm

1 stop10h 19m

Washington, D.C. Reagan-National

Tue 3/10

8:00 am-11:59 pm

1 stop18h 59m

$185

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 3/5

6:05 am-4:59 pm

1 stop7h 54m

Washington, D.C. Reagan-National

Wed 3/11

6:00 pm-11:59 pm

1 stop8h 59m

$188

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 3/2

6:10 am-4:59 pm

1 stop7h 49m

Washington, D.C. Reagan-National

Wed 3/4

2:00 pm-9:34 pm

1 stop10h 34m

$194

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 3/2

6:10 am-4:59 pm

1 stop7h 49m

Washington, D.C. Reagan-National

Wed 3/4

2:00 pm-9:34 pm

1 stop10h 34m

$195

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 5/8

5:33 pm-1:00 pm

1 stop16h 27m

Washington, D.C. Reagan-National

Sun 5/10

1:59 pm-7:31 am

1 stop20h 32m

$199

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 4/15

12:59 am-1:00 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Fri 5/8

1:59 pm-11:55 pm

1 stop12h 56m

$200

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sun 3/1

6:10 am-1:00 pm

1 stop27h 50m

Washington, D.C. Reagan-National

Tue 3/3

2:00 pm-9:34 pm

1 stop10h 34m

$201

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 3/5

6:05 am-4:59 pm

1 stop7h 54m

Washington, D.C. Reagan-National

Wed 3/11

6:00 pm-11:59 pm

1 stop8h 59m

$202

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 4/10

6:20 am-12:02 pm

1 stop26h 42m

Washington, D.C. Reagan-National

Mon 4/13

6:00 pm-11:56 pm

1 stop8h 56m

$207

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 2/28

6:00 am-9:59 pm

1 stop12h 59m

Washington, D.C. Reagan-National

Thu 3/5

2:00 pm-11:59 pm

1 stop12h 59m

$209

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

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

What is the cheapest month to fly to Washington, D.C. Reagan-National Airport?

The month of January is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Ontario, with most prices found around $265. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $293.

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 $405. Flights from Ontario to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $551. 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 at noon. Our users have found flights to Washington, D.C. Reagan-National Airport at noon for as low as $403. 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 $456.

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 $353 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 $317 on momondo.

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

As of February 2026, prices for Ontario to Washington, D.C. Reagan-National Airport flights are approximately 10% 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

Fastest flight time	6h 55m
Direct flights	None

The fastest flight from Ontario to Washington, D.C. Reagan-National Airport takes 6h 55m

There are no direct flights from Ontario to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Ontario to Washington, D.C. Reagan-National Airport.

Search flight deals

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 55m.
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?
The number of operators available for flights from Ontario Airport to Washington, D.C. Reagan-National Airport is 5 as of February 2026.
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?
momondo data reveals that the most frequently booked airline on the route from Ontario to Washington, D.C. Reagan-National Airport is Frontier, representing 44% of all bookings. The subsequent popular airlines are American Airlines at 22%, Southwest at 16%, and United Airlines at 13%.

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
Frontier	PriceFrom $147	Free Cancellation	Rating 5.7 3,052 reviews	Search Frontier flights
Delta	PriceFrom $208	Free Cancellation	Rating 7.9 8,195 reviews	Search Delta flights
United Airlines	PriceFrom $226	Free Cancellation	Rating 7.4 9,284 reviews	Search United Airlines flights
Southwest	PriceFrom $258	Free Cancellation	Rating 8.0 4,283 reviews	Search Southwest flights
American Airlines	PriceFrom $318	Free Cancellation	Rating 7.2 11,279 reviews	Search American Airlines flights

Alexandria

National Harbor

Gettysburg

Arlington

Waldorf

Woodbridge

Laurel

Colonial Beach

Tysons

Silver Spring

Towson

Fredericksburg

Gaithersburg

Rockville

Manassas

Springfield

Fairfax

Linthicum Heights

Bethesda

Glen Burnie

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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Cheap flights from Ontario to Washington, D.C. from $65

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 4/13. 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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Frontier flights from Ontario to Washington, D.C. Reagan-National Airport

Our best Frontier deals on Ontario to Washington, D.C. Reagan-National Airport flight tickets

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

See travel insights to Washington, D.C. from

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

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

What is the cheapest month to fly to Washington, D.C. Reagan-National Airport?

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

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

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

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

What is the cheapest airline that flies from Ontario to Washington, D.C. Reagan-National?

What airlines fly to Washington, D.C. Reagan-National Airport?

Which airport is the most popular layover for flights between Ontario and Washington, D.C. Reagan-National Airport?

Which layover airport offers the lowest fares from Ontario to Washington, D.C. Reagan-National Airport?

Which layover airport has the shortest travel time from Ontario to Washington, D.C. Reagan-National Airport?

Which layover airport has the shortest connection time from Ontario to Washington, D.C. Reagan-National Airport?

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

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

Fastest flight time

Direct flights

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

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

Why use momondo?

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

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

How can momondo help me find flights 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?

An easier way to manage your Washington, D.C. Reagan-National Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Washington, D.C.

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