What airlines fly to District of Columbia?

United Airlines, Southwest and American Airlines are the top three most popular airlines that fly to District of Columbia from Ontario according to our data. United Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to District of Columbia. Keep in mind that there are 9 different airlines that fly to District of Columbia on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Ontario to District of Columbia?

Frontier, Delta, and Southwest are the most popular carriers operating from Ontario to District of Columbia

When did momondo last update prices for flights from Ontario Airport to District of Columbia?

Prices for flights from Ontario Airport to District of Columbia refresh daily.

How many operators does momondo search for flights from Ontario Airport to District of Columbia?

As of April 2026, there are 5 operators available to choose from for flights from Ontario Airport to District of Columbia.

How old do you have to be to fly from Ontario Airport to District of Columbia?

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 District of Columbia.

What documentation or ID do you need to fly to District of Columbia?

The travel and health documents required for your trip to District of Columbia 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 District of Columbia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$85 Cheap Flights from Ontario to District of Columbia in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to District of Columbia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:39 pm - 8:12 am

ONT

IAD

12h 33m

1 stop

9:12 am - 3:44 pm

IAD

ONT

9h 32m

1 stop

$160Frontier

Wed, May 20 - Tue, May 26

4:39 pm - 8:12 am

ONT

IAD

12h 33m

1 stop

9:12 am - 3:44 pm

IAD

ONT

9h 32m

1 stop

$167Frontier

Wed, May 20 - Tue, May 26

10:50 am - 12:59 pm

ONT

DCA

23h 09m

1 stop

7:00 am - 10:05 am

DCA

ONT

30h 05m

1 stop

$185Frontier

Wed, May 20 - Tue, May 26

4:39 pm - 8:12 am

ONT

IAD

12h 33m

1 stop

9:12 am - 3:44 pm

IAD

ONT

9h 32m

1 stop

$185Frontier

Wed, May 20 - Wed, May 27

3:30 pm - 8:12 am

ONT

IAD

13h 42m

1 stop

9:12 am - 3:44 pm

IAD

ONT

9h 32m

1 stop

$192Frontier

Sat, May 23 - Tue, May 26

6:00 am - 12:59 pm

ONT

DCA

27h 59m

1 stop

7:00 am - 10:05 am

DCA

ONT

30h 05m

1 stop

$201Frontier

Sat, May 23 - Fri, May 29

6:00 am - 12:59 pm

ONT

DCA

27h 59m

1 stop

7:00 am - 10:05 am

DCA

ONT

30h 05m

1 stop

$202Frontier

Sat, May 23 - Fri, May 29

6:00 am - 12:59 pm

ONT

DCA

27h 59m

1 stop

1:59 pm - 10:05 am

DCA

ONT

23h 06m

1 stop

$203Frontier

Sat, May 23 - Fri, May 29

4:39 pm - 8:12 am

ONT

IAD

12h 33m

1 stop

9:12 am - 3:44 pm

IAD

ONT

9h 32m

1 stop

$205Frontier

Wed, May 20 - Tue, May 26

6:00 am - 12:59 pm

ONT

DCA

27h 59m

1 stop

7:00 am - 10:05 am

DCA

ONT

30h 05m

1 stop

$207Frontier

Tue, May 19 - Sun, May 24

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Frontier flights from Ontario to District of Columbia

Our best Frontier deals on Ontario to District of Columbia flight tickets

Frontier

May 20

ONT4:39 pmOntario

12h 33m

1 stop

IAD8:12 amWashington, D.C. Dulles Intl

May 26

IAD9:12 amWashington, D.C. Dulles Intl

9h 32m

1 stop

ONT3:44 pmOntario

$160

Frontier

May 20

ONT4:39 pmOntario

12h 33m

1 stop

IAD8:12 amWashington, D.C. Dulles Intl

May 26

IAD9:12 amWashington, D.C. Dulles Intl

9h 32m

1 stop

ONT3:44 pmOntario

$167

Frontier

May 20

ONT4:39 pmOntario

12h 33m

1 stop

IAD8:12 amWashington, D.C. Dulles Intl

May 27

IAD9:12 amWashington, D.C. Dulles Intl

9h 32m

1 stop

ONT3:44 pmOntario

$185

American Airlines flights from Ontario to District of Columbia

Our best American Airlines deals on Ontario to District of Columbia flight tickets

American Airlines

Sep 12

ONT11:03 pmOntario

6h 35m

1 stop

IAD8:38 amWashington, D.C. Dulles Intl

Sep 16

IAD6:41 pmWashington, D.C. Dulles Intl

7h 25m

1 stop

ONT11:06 pmOntario

$233

American Airlines

May 20

ONT12:19 pmOntario

8h 38m

2 stops

DCA11:57 pmWashington, D.C. Reagan-National

May 27

DCA5:26 pmWashington, D.C. Reagan-National

8h 10m

1 stop

ONT10:36 pmOntario

$278

American Airlines

May 7

ONT10:26 pmOntario

7h 23m

1 stop

IAD8:49 amWashington, D.C. Dulles Intl

May 12

IAD7:00 amWashington, D.C. Dulles Intl

9h 18m

1 stop

ONT1:18 pmOntario

$493

momondo Fare Finder

Use the filters below to find and compare flights from Ontario to District of Columbia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 5/20

4:39 pm-8:12 am

1 stop12h 33m

Washington, D.C. Dulles Intl

Tue 5/26

9:12 am-3:44 pm

1 stop9h 32m

$160

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 5/20

4:39 pm-8:12 am

1 stop12h 33m

Washington, D.C. Dulles Intl

Tue 5/26

9:12 am-3:44 pm

1 stop9h 32m

$167

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 5/20

10:50 am-12:59 pm

1 stop23h 09m

Washington, D.C. Reagan-National

Tue 5/26

7:00 am-10:05 am

1 stop30h 05m

$185

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 5/20

4:39 pm-8:12 am

1 stop12h 33m

Washington, D.C. Dulles Intl

Wed 5/27

9:12 am-3:44 pm

1 stop9h 32m

$185

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 5/23

3:30 pm-8:12 am

1 stop13h 42m

Washington, D.C. Dulles Intl

Tue 5/26

9:12 am-3:44 pm

1 stop9h 32m

$192

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 5/23

6:00 am-12:59 pm

1 stop27h 59m

Washington, D.C. Reagan-National

Fri 5/29

7:00 am-10:05 am

1 stop30h 05m

$201

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 5/23

6:00 am-12:59 pm

1 stop27h 59m

Washington, D.C. Reagan-National

Fri 5/29

7:00 am-10:05 am

1 stop30h 05m

$202

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 5/23

6:00 am-12:59 pm

1 stop27h 59m

Washington, D.C. Reagan-National

Fri 5/29

1:59 pm-10:05 am

1 stop23h 06m

$203

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 5/20

4:39 pm-8:12 am

1 stop12h 33m

Washington, D.C. Dulles Intl

Tue 5/26

9:12 am-3:44 pm

1 stop9h 32m

$205

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 5/19

6:00 am-12:59 pm

1 stop27h 59m

Washington, D.C. Reagan-National

Sun 5/24

7:00 am-10:05 am

1 stop30h 05m

$207

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 District of Columbia

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

What is the cheapest month to fly to District of Columbia?

In general, May is the cheapest month to fly from Ontario to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $221. If you don’t want to visit District of Columbia in May, then you should wait until January to fly from Ontario, when ticket prices are also cheap, with an average price of $223.

What is the cheapest Ontario to District of Columbia flight route?

Fly from Ontario to Baltimore/Washington for the best Ontario - District of Columbia flight prices

What cabin class options are available on Ontario to District of Columbia flights?

There is only 1 cabin class available to choose from on Ontario to District of Columbia 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 District of Columbia flights?

You could potentially save up to 37% on your flight if you consider stops on a Ontario to District of Columbia flight.

Cheap Ontario to District of Columbia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to District of Columbia

Fastest flight time	6h 50m
Direct flights	None

The fastest flight from Ontario to District of Columbia takes 6h 50m

There are no direct flights from Ontario to District of Columbia. There are no popular flight routes from Ontario to District of Columbia.

Search flight deals

Frequently asked questions about flying from Ontario to District of Columbia

When did momondo last update prices for flights from Ontario Airport to District of Columbia?
Prices for flights from Ontario Airport to District of Columbia refresh daily.
How many operators does momondo search for flights from Ontario Airport to District of Columbia?
As of April 2026, there are 5 operators available to choose from for flights from Ontario Airport to District of Columbia.
How old do you have to be to fly from Ontario Airport to District of Columbia?
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 District of Columbia.
What documentation or ID do you need to fly to District of Columbia?
The travel and health documents required for your trip to District of Columbia 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 District of Columbia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to District of Columbia

Compare and see reviews for airlines that fly from Ontario to District of Columbia with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $128	Free Cancellation	Rating 7.9 8,463 reviews	Search Delta flights
Frontier	PriceFrom $136	Free Cancellation	Rating 5.6 2,974 reviews	Search Frontier flights
United Airlines	PriceFrom $226	Free Cancellation	Rating 7.4 9,665 reviews	Search United Airlines flights
American Airlines	PriceFrom $256	Free Cancellation	Rating 7.1 11,668 reviews	Search American Airlines flights
Southwest	PriceFrom $258	Free Cancellation	Rating 8.0 4,324 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to District of Columbia?

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

Can I find flights from Ontario to District of Columbia with flexible booking policies on momondo?

Yes. All flights to District of Columbia from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Ontario to District of Columbia?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to District of Columbia from Ontario.

I’m not ready to book a flight from Ontario to District of Columbia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to District of Columbia from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.