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

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

How many flights depart from Ontario to Washington, D.C. on average per week?

As of September 2026, 4 flights take off from Ontario and land in Washington, D.C. each week. The most common flight departure day for this route is Sun, with 75% of weekly flights taking off on this day.

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

Flights via Denver (DEN) offer the lowest average round-trip price of $264.

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

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 7h 06m.

What airlines fly to Washington, D.C.?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Washington, D.C. from Ontario according to our data. United Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 7 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

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

Atlanta (ATL) has the shortest average layover time for this route: 1h 22m.

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

Denver (DEN) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

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

Prices for flights from Ontario Airport to Washington, D.C. are refreshed on a daily basis.

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

There are 6 operators available for flights from Ontario Airport to Washington, D.C. as of September 2026.

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

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 Ontario Airport to Washington, D.C..

What documentation or ID do you need to fly to Washington, D.C.?

The required travel and health documents for your Washington, D.C. 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.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$87 Cheap Flights from Ontario to Washington, D.C. in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Washington, D.C.

Round-trip

One-way

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Enter your travel dates to find the best prices.

8:03 pm - 10:58 amONT Ontario-BWI Baltimore/Washington

11h 55m1 stop Dallas/Fort Worth

11:07 am - 4:38 pmBWI Baltimore/Washington-ONT Ontario

8h 31m1 stop Dallas/Fort Worth

$248Frontier

Thu, Oct 22 - Tue, Oct 27

8:03 pm - 10:52 amONT Ontario-BWI Baltimore/Washington

11h 49m1 stop Dallas/Fort Worth

2:07 pm - 7:08 pmBWI Baltimore/Washington-ONT Ontario

8h 01m1 stop Dallas/Fort Worth

$248Frontier

Thu, Oct 29 - Mon, Nov 2

11:13 am - 11:59 pmONT Ontario-IAD Washington, D.C. Dulles Intl

9h 46m1 stop Seattle/Tacoma Intl

7:46 am - 3:13 pmIAD Washington, D.C. Dulles Intl-ONT Ontario

10h 27m1 stop Seattle/Tacoma Intl

$248Alaska Airlines

Thu, Oct 29 - Tue, Nov 17

1:52 pm - 1:06 amONT Ontario-IAD Washington, D.C. Dulles Intl

8h 14m1 stop San Francisco

5:48 pm - 10:51 pmIAD Washington, D.C. Dulles Intl-ONT Ontario

8h 03m1 stop San Francisco

$249United Airlines

Wed, Oct 7 - Sat, Oct 10

6:53 pm - 6:00 amONT Ontario-IAD Washington, D.C. Dulles Intl

8h 07m1 stop San Francisco

5:55 pm - 11:06 pmIAD Washington, D.C. Dulles Intl-ONT Ontario

8h 11m1 stop San Francisco

$249United Airlines

Sat, Feb 20 - Sat, Feb 27

11:13 am - 11:59 pmONT Ontario-IAD Washington, D.C. Dulles Intl

9h 46m1 stop Seattle/Tacoma Intl

6:00 am - 4:30 pmIAD Washington, D.C. Dulles Intl-ONT Ontario

13h 30m1 stop Las Vegas Harry Reid Intl

$250Multiple Airlines

Fri, Oct 16 - Sat, Oct 17

11:55 pm - 11:55 amONT Ontario-DCA Washington, D.C. Reagan-National

9h 00m1 stop Chicago Midway

6:10 am - 11:55 amDCA Washington, D.C. Reagan-National-ONT Ontario

8h 45m2 stops Dallas Love Field Las Vegas Harry Reid Intl

$251Southwest

Mon, Oct 26 - Tue, Nov 10

10:50 am - 8:40 pmONT Ontario-DCA Washington, D.C. Reagan-National

6h 50m1 stop Las Vegas Harry Reid Intl

4:00 pm - 9:45 pmDCA Washington, D.C. Reagan-National-ONT Ontario

8h 45m2 stops Omaha Eppley Airfield Denver Intl

$251Southwest

Sat, Oct 31 - Wed, Nov 4

7:00 am - 7:14 pmONT Ontario-DCA Washington, D.C. Reagan-National

9h 14m1 stop Atlanta Hartsfield-Jackson

5:00 pm - 11:48 pmDCA Washington, D.C. Reagan-National-ONT Ontario

9h 48m1 stop Salt Lake City

$291Delta

Thu, Jan 28 - Tue, Feb 2

11:08 pm - 9:15 amONT Ontario-DCA Washington, D.C. Reagan-National

7h 07m1 stop Atlanta Hartsfield-Jackson

6:00 am - 11:27 amDCA Washington, D.C. Reagan-National-ONT Ontario

8h 27m1 stop Atlanta Hartsfield-Jackson

$291Delta

Mon, Dec 7 - Tue, Jan 12

Cheap last minute flights

Enter your travel dates to find the best prices.

6:15 am - 9:59 pmONT Ontario-DCA Washington, D.C. Reagan-National

12h 44m1 stop Denver Intl

1:00 pm - 11:51 pmDCA Washington, D.C. Reagan-National-ONT Ontario

13h 51m1 stop Denver Intl

$320Frontier

Sat, Sep 26 - Sat, Oct 31

6:15 am - 4:59 pmONT Ontario-DCA Washington, D.C. Reagan-National

7h 44m1 stop Denver Intl

7:00 am - 10:29 amDCA Washington, D.C. Reagan-National-ONT Ontario

30h 29m1 stop Denver Intl

$326Frontier

Sat, Sep 26 - Tue, Oct 13

10:04 am - 6:20 amONT Ontario-IAD Washington, D.C. Dulles Intl

17h 16m1 stop Las Vegas Harry Reid Intl

9:38 am - 12:06 pmIAD Washington, D.C. Dulles Intl-ONT Ontario

29h 28m1 stop Seattle/Tacoma Intl

$466Multiple Airlines

Sat, Sep 26 - Sat, Oct 31

12:12 pm - 6:30 amONT Ontario-BWI Baltimore/Washington

15h 18m1 stop Seattle/Tacoma Intl

12:45 pm - 6:16 pmBWI Baltimore/Washington-ONT Ontario

8h 31m1 stop Dallas/Fort Worth

$518Multiple Airlines

Tue, Sep 22 - Wed, Sep 23

8:25 am - 9:29 pmONT Ontario-BWI Baltimore/Washington

10h 04m1 stop Dallas/Fort Worth

7:39 am - 6:17 pmBWI Baltimore/Washington-ONT Ontario

13h 38m2 stops Charlotte Douglas Phoenix Sky Harbor Intl

$545American Airlines

Wed, Sep 23 - Wed, Sep 30

10:25 am - 8:24 pmONT Ontario-IAD Washington, D.C. Dulles Intl

6h 59m1 stop Dallas/Fort Worth

6:52 am - 11:47 amIAD Washington, D.C. Dulles Intl-ONT Ontario

7h 55m1 stop Dallas/Fort Worth

$587American Airlines

Sat, Sep 26 - Tue, Sep 29

7:00 am - 7:10 pmONT Ontario-DCA Washington, D.C. Reagan-National

9h 10m2 stops Denver Intl Chicago Midway

10:40 am - 5:25 pmDCA Washington, D.C. Reagan-National-ONT Ontario

9h 45m2 stops Chicago Midway Phoenix Sky Harbor Intl

$597Southwest

Wed, Sep 23 - Sat, Sep 26

8:30 am - 8:55 pmONT Ontario-DCA Washington, D.C. Reagan-National

9h 25m2 stops Austin Bergstrom New Orleans Louis Armstrong

6:05 am - 12:40 pmDCA Washington, D.C. Reagan-National-ONT Ontario

9h 35m2 stops Nashville Intl Las Vegas Harry Reid Intl

$597Southwest

Tue, Sep 22 - Tue, Sep 29

7:05 am - 7:43 pmONT Ontario-BWI Baltimore/Washington

9h 38m1 stop Atlanta Hartsfield-Jackson

5:00 pm - 10:24 pmBWI Baltimore/Washington-ONT Ontario

8h 24m1 stop Atlanta Hartsfield-Jackson

$627Delta

Sat, Sep 26 - Mon, Sep 28

10:00 pm - 9:16 amONT Ontario-BWI Baltimore/Washington

8h 16m1 stop Atlanta Hartsfield-Jackson

7:40 am - 12:14 pmBWI Baltimore/Washington-ONT Ontario

7h 34m1 stop Salt Lake City

$627Delta

Thu, Sep 24 - Sat, Sep 26

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United Airlines flights from Ontario to Washington, D.C.

Our best United Airlines deals on Ontario to Washington, D.C. flight tickets

United Airlines

Oct 26

ONT1:35 pmOntario

8h 24m

1 stop

IAD12:59 amWashington, D.C. Dulles Intl

Oct 29

IAD6:15 amWashington, D.C. Dulles Intl

9h 14m

1 stop

ONT12:29 pmOntario

$261

United Airlines

Oct 13

ONT1:52 pmOntario

8h 14m

1 stop

IAD1:06 amWashington, D.C. Dulles Intl

Oct 14

IAD5:48 pmWashington, D.C. Dulles Intl

8h 03m

1 stop

ONT10:51 pmOntario

$281

United Airlines

Oct 17

ONT11:10 amOntario

8h 20m

1 stop

DCA10:30 pmWashington, D.C. Reagan-National

Oct 19

DCA3:30 pmWashington, D.C. Reagan-National

10h 19m

1 stop

ONT10:49 pmOntario

$301

Delta flights from Ontario to Washington, D.C.

Our best Delta deals on Ontario to Washington, D.C. flight tickets

Delta

Oct 28

ONT1:35 pmOntario

7h 00m

1 stop

IAD11:35 pmWashington, D.C. Dulles Intl

Nov 11

IAD7:00 amWashington, D.C. Dulles Intl

8h 17m

1 stop

ONT12:17 pmOntario

$291

Delta

Oct 16

ONT12:16 pmOntario

9h 26m

1 stop

IAD12:42 amWashington, D.C. Dulles Intl

Oct 20

IAD6:00 amWashington, D.C. Dulles Intl

8h 06m

1 stop

ONT11:06 amOntario

$303

Delta

Oct 5

ONT10:00 pmOntario

8h 19m

1 stop

IAD9:19 amWashington, D.C. Dulles Intl

Oct 17

IAD6:00 amWashington, D.C. Dulles Intl

8h 06m

1 stop

ONT11:06 amOntario

$346

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Thu 10/22

8:03 pm-10:58 am

1 stop11h 55m

Baltimore/Washington

Tue 10/27

11:07 am-4:38 pm

1 stop8h 31m

$248

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Thu 10/29

8:03 pm-10:52 am

1 stop11h 49m

Baltimore/Washington

Mon 11/2

2:07 pm-7:08 pm

1 stop8h 01m

$248

OntarioWashington, D.C.

ONT Ontario - IAD Washington, D.C. Dulles Intl

ONTIAD

Ontario

Thu 10/29

11:13 am-11:59 pm

1 stop9h 46m

Washington, D.C. Dulles Intl

Tue 11/17

7:46 am-3:13 pm

1 stop10h 27m

$248

OntarioWashington, D.C.

ONT Ontario - IAD Washington, D.C. Dulles Intl

ONTIAD

Ontario

Wed 10/7

1:52 pm-1:06 am

1 stop8h 14m

Washington, D.C. Dulles Intl

Sat 10/10

5:48 pm-10:51 pm

1 stop8h 03m

$249

OntarioWashington, D.C.

ONT Ontario - IAD Washington, D.C. Dulles Intl

ONTIAD

Ontario

Sat 2/20

6:53 pm-6:00 am

1 stop8h 07m

Washington, D.C. Dulles Intl

Sat 2/27

5:55 pm-11:06 pm

1 stop8h 11m

$249

OntarioWashington, D.C.

ONT Ontario - IAD Washington, D.C. Dulles Intl

ONTIAD

Ontario

Fri 10/16

11:13 am-11:59 pm

1 stop9h 46m

Washington, D.C. Dulles Intl

Sat 10/17

6:00 am-4:30 pm

1 stop13h 30m

$250

OntarioWashington, D.C.

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

ONTDCA

Ontario

Mon 10/26

11:55 pm-11:55 am

1 stop9h 00m

Washington, D.C. Reagan-National

Tue 11/10

6:10 am-11:55 am

2 stops8h 45m

$251

OntarioWashington, D.C.

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

ONTDCA

Ontario

Sat 10/31

10:50 am-8:40 pm

1 stop6h 50m

Washington, D.C. Reagan-National

Wed 11/4

4:00 pm-9:45 pm

2 stops8h 45m

$251

OntarioWashington, D.C.

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

ONTDCA

Ontario

Thu 1/28

7:00 am-7:14 pm

1 stop9h 14m

Washington, D.C. Reagan-National

Tue 2/2

5:00 pm-11:48 pm

1 stop9h 48m

$291

Quickest round-trip

OntarioWashington, D.C.

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

ONTDCA

Ontario

Mon 12/7

11:08 pm-9:15 am

1 stop7h 07m

Washington, D.C. Reagan-National

Tue 1/12

6:00 am-11:27 am

1 stop8h 27m

$291

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.

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

Other information

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

Prices are currently low for flights on this route.

Typical prices usually range from $280 to $466.
The lowest price recently found on this route was $248.

What is the cheapest month to fly to Washington, D.C.?

The month of January is, on average, the cheapest month to fly to Washington, D.C. from Ontario, with most prices found around $380. If you’re not able to fly to Washington, D.C. in January, then February is your next best option. Flight prices from Ontario to Washington, D.C. during February average around $381.

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

On average, the least expensive day to fly to Washington, D.C. from Ontario is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $469. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Washington, D.C. for around $657.

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

In the afternoon is the cheapest time of day to fly from Ontario to Washington, D.C. when you can find flight prices for as low as $431. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $563. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ontario to Washington, D.C. flight route?

Fly from Ontario to Baltimore/Washington for the best Ontario - Washington, D.C. flight prices

What cabin class options are available on Ontario to Washington, D.C. flights?

There is only 1 cabin class available to choose from on Ontario to Washington, D.C. flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ontario to Washington, D.C. flights?

You could potentially save up to 27% on your flight if you consider stops on a Ontario to Washington, D.C. flight.

How have Ontario to Washington, D.C. flight prices changed over time?

As of September 2026, prices for Ontario to Washington, D.C. flights are approximately 12% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Washington, D.C. 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. (ONT to WAS) flight deals and tips

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

Best Price Found	$87
Fastest flight time	6h 19m
Direct flights	None

The best one-way flight to Washington, D.C. from Ontario in the past 72 hours is $87. The best round-trip flight deal from Ontario to Washington, D.C. found on momondo in the last 72 hours is $248.

The fastest flight from Ontario to Washington, D.C. takes 6h 19m

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

Search flight deals

Frequently asked questions about flying from Ontario to Washington, D.C.

How far is Ontario to Washington, D.C. by plane?
Ontario and Washington, D.C. are 2260.6 mi apart from one another. In terms of flight time, this usually takes a little over 6h 19m.
When did momondo last update prices for flights from Ontario Airport to Washington, D.C.?
Prices for flights from Ontario Airport to Washington, D.C. are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario Airport to Washington, D.C.?
There are 6 operators available for flights from Ontario Airport to Washington, D.C. as of September 2026.
How old do you have to be to fly from Ontario Airport to Washington, D.C.?
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 Ontario Airport to Washington, D.C..
What documentation or ID do you need to fly to Washington, D.C.?
The required travel and health documents for your Washington, D.C. 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.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Ontario to Washington, D.C.?
momondo data reveals that the most frequently booked plane model on the route from Ontario to Washington, D.C. is Boeing 737 MAX 9, representing 13.73% of all bookings. The subsequent popular models are Airbus A321neo at 11.76%, Boeing 737-800 Passenger/BBJ2 (winglets) at 11.76%, and Boeing 737 MAX 8 at 9.80%.
What is the most popular airline from Ontario to Washington, D.C.?
Based on momondo bookings for flights between Ontario and Washington, D.C., the leading airline is Frontier, making up 35% of the total bookings. Other popular airlines include Southwest with 33%, Delta with 14%, and American Airlines with 12%.

Best airlines flying from Ontario to Washington, D.C.

Compare and see reviews for airlines that fly from Ontario to Washington, D.C. with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $172	Free Cancellation	Rating 5.6 2,584 reviews	Search Frontier flights
Delta	PriceFrom $183	Free Cancellation	Rating 7.8 8,597 reviews	Search Delta flights
United Airlines	PriceFrom $256	Free Cancellation	Rating 7.4 10,222 reviews	Search United Airlines flights
Southwest	PriceFrom $318	Free Cancellation	Rating 8.0 4,194 reviews	Search Southwest flights
American Airlines	PriceFrom $318	Free Cancellation	Rating 7.0 12,076 reviews	Search American Airlines flights
JetBlue	PriceFrom $361	Free Cancellation	Rating 7.1 3,036 reviews	Search JetBlue flights

Southwest Flights From Ontario to Washington, D.C.
The lowest priced Southwest flight from Ontario to Washington, D.C. from the last 72 hours was $318. Generally, Southwest has 1 flight on this route every week with an average price of $488. Southwest is rated 8.0/10 by our users.

Alexandria

National Harbor

Arlington

Gettysburg

Fredericksburg

Waldorf

Laurel

Woodbridge

Linthicum Heights

Gaithersburg

Rockville

Silver Spring

Towson

Fairfax

Springfield

Glen Burnie

Edgewood

Colonial Beach

College Park

Bethesda

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Washington, D.C.. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Ontario to Washington, D.C. flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Ontario and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Ontario to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Fly into one of these airports located in Washington, D.C.

Washington, D.C. Reagan-National Airport

Washington, D.C. Dulles Intl Airport

Cheap flights from Ontario to Washington, D.C. from $87

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 12/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Ontario to Washington, D.C.

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

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United Airlines flights from Ontario to Washington, D.C.

Our best United Airlines deals on Ontario to Washington, D.C. flight tickets

Delta flights from Ontario to Washington, D.C.

Our best Delta deals on Ontario to Washington, D.C. flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Ontario to Washington, D.C. 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.

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

What is the cheapest month to fly to Washington, D.C.?

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

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

What is the cheapest Ontario to Washington, D.C. flight route?

What cabin class options are available on Ontario to Washington, D.C. flights?

Can stopping save me money on Ontario to Washington, D.C. flights?

How have Ontario to Washington, D.C. flight prices changed over time?

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

What airlines fly to Washington, D.C.?

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

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

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

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

How many flights depart from Ontario to Washington, D.C. on average per week?

When to book flights from Ontario to Washington, D.C.

Cheap Ontario to Washington, D.C. (ONT to WAS) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to Washington, D.C.

Best airlines flying from Ontario to Washington, D.C.

Compare and see reviews for airlines that fly from Ontario to Washington, D.C. with momondo

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

Why use momondo?

An easier way to manage your Washington, D.C. 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 the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.

Fly your favorite airline to Washington, D.C.

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Washington, D.C.

List of cabin classes available on flights landing in Washington, D.C.. Availability may vary depending on flight origin and airline.

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Ontario

According to popular flight searches on momondo this year

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