What airlines fly to District of Columbia?

United Airlines, American Airlines and Southwest 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 45% 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 and Delta 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 February 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.

$95 Cheap Flights from Ontario to District of Columbia in 2026

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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.

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 - Tue, Apr 21

12:59 am - 1:00 pm

ONT

DCA

9h 01m

1 stop

6:00 pm - 11:55 pm

DCA

ONT

8h 55m

1 stop

$201Frontier

Mon, Apr 13 - Fri, Apr 17

12:59 am - 9:59 pm

ONT

DCA

18h 00m

1 stop

6:00 pm - 11:55 pm

DCA

ONT

8h 55m

1 stop

$202Frontier

Thu, Apr 16 - Fri, May 1

12:59 am - 1:00 pm

ONT

DCA

9h 01m

1 stop

8:00 am - 7:31 am

DCA

ONT

26h 31m

1 stop

$207Frontier

Mon, Apr 13 - Sun, Apr 19

12:59 am - 9:59 pm

ONT

DCA

18h 00m

1 stop

8:00 am - 7:26 am

DCA

ONT

26h 26m

1 stop

$211Frontier

Thu, Apr 16 - Sat, Apr 25

11:53 am - 11:55 pm

ONT

IAD

9h 02m

1 stop

7:00 am - 1:39 pm

IAD

ONT

9h 39m

1 stop

$283Delta

Wed, Apr 15 - Tue, Apr 21

3:26 pm - 5:50 am

ONT

IAD

11h 24m

1 stop

7:10 am - 9:45 am

IAD

ONT

29h 35m

1 stop

$285Alaska Airlines

Wed, Apr 22 - Wed, Apr 29

7:00 am - 11:32 pm

ONT

IAD

13h 32m

2 stops

7:00 am - 1:39 pm

IAD

ONT

9h 39m

1 stop

$288Delta

Wed, Apr 15 - Tue, Apr 21

6:15 am - 6:12 pm

ONT

IAD

8h 57m

1 stop

7:00 am - 6:13 pm

IAD

ONT

14h 13m

1 stop

$300Multiple Airlines

Thu, Apr 16 - Tue, Apr 21

6:00 am - 5:40 am

ONT

IAD

20h 40m

1 stop

7:11 pm - 9:45 am

IAD

ONT

17h 34m

1 stop

$303Alaska Airlines

Wed, Apr 15 - Tue, Apr 21

Delta flights from Ontario to District of Columbia

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

Delta

Apr 15

ONT11:53 amOntario

9h 02m

1 stop

IAD11:55 pmWashington, D.C. Dulles Intl

Apr 21

IAD7:00 amWashington, D.C. Dulles Intl

9h 39m

1 stop

ONT1:39 pmOntario

$283

Delta

Apr 15

ONT7:00 amOntario

13h 32m

2 stops

IAD11:32 pmWashington, D.C. Dulles Intl

Apr 21

IAD7:00 amWashington, D.C. Dulles Intl

9h 39m

1 stop

ONT1:39 pmOntario

$288

Delta

Apr 15

ONT5:55 pmOntario

12h 20m

2 stops

IAD9:15 amWashington, D.C. Dulles Intl

Apr 21

IAD6:00 amWashington, D.C. Dulles Intl

14h 15m

2 stops

ONT5:15 pmOntario

$294

American Airlines flights from Ontario to District of Columbia

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

American Airlines

Mar 16

ONT7:59 pmOntario

12h 01m

2 stops

IAD11:00 amWashington, D.C. Dulles Intl

Mar 18

IAD6:00 amWashington, D.C. Dulles Intl

10h 48m

1 stop

ONT1:48 pmOntario

$324

American Airlines

Mar 16

ONT11:59 pmOntario

8h 01m

1 stop

IAD11:00 amWashington, D.C. Dulles Intl

Mar 18

IAD5:52 pmWashington, D.C. Dulles Intl

9h 07m

1 stop

ONT11:59 pmOntario

$326

American Airlines

Mar 25

ONT10:36 pmOntario

7h 12m

1 stop

IAD8:48 amWashington, D.C. Dulles Intl

Apr 8

IAD7:00 amWashington, D.C. Dulles Intl

9h 18m

1 stop

ONT1:18 pmOntario

$328

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

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 4/15

12:59 am-1:00 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Tue 4/21

1:59 pm-11:55 pm

1 stop12h 56m

$200

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 4/13

12:59 am-1:00 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Fri 4/17

6:00 pm-11:55 pm

1 stop8h 55m

$201

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 4/16

12:59 am-9:59 pm

1 stop18h 00m

Washington, D.C. Reagan-National

Fri 5/1

6:00 pm-11:55 pm

1 stop8h 55m

$202

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 4/13

12:59 am-1:00 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Sun 4/19

8:00 am-7:31 am

1 stop26h 31m

$207

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 4/16

12:59 am-9:59 pm

1 stop18h 00m

Washington, D.C. Reagan-National

Sat 4/25

8:00 am-7:26 am

1 stop26h 26m

$211

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 4/15

11:53 am-11:55 pm

1 stop9h 02m

Washington, D.C. Dulles Intl

Tue 4/21

7:00 am-1:39 pm

1 stop9h 39m

$283

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 4/22

3:26 pm-5:50 am

1 stop11h 24m

Washington, D.C. Dulles Intl

Wed 4/29

7:10 am-9:45 am

1 stop29h 35m

$285

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 4/15

7:00 am-11:32 pm

2 stops13h 32m

Washington, D.C. Dulles Intl

Tue 4/21

7:00 am-1:39 pm

1 stop9h 39m

$288

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 4/16

6:15 am-6:12 pm

1 stop8h 57m

Washington, D.C. Dulles Intl

Tue 4/21

7:00 am-6:13 pm

1 stop14h 13m

$300

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 4/15

6:00 am-5:40 am

1 stop20h 40m

Washington, D.C. Dulles Intl

Tue 4/21

7:11 pm-9:45 am

1 stop17h 34m

$303

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, January 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 $223. If you don’t want to visit District of Columbia in January, then you should wait until September to fly from Ontario, when ticket prices are also cheap, with an average price of $226.

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

How far in advance should I book a flight to District of Columbia?

You are more likely to see cheaper flights to District of Columbia from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to District of Columbia for around $486 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to District of Columbia from Ontario for as low as $297 on momondo.

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 33m
Direct flights	None

The fastest flight from Ontario to District of Columbia takes 6h 33m

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

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 February 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
Spirit Airlines	PriceFrom $72	Free Cancellation	Rating 6.3 8,482 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $136	Free Cancellation	Rating 5.7 3,046 reviews	Search Frontier flights
Delta	PriceFrom $172	Free Cancellation	Rating 7.9 8,228 reviews	Search Delta flights
United Airlines	PriceFrom $226	Free Cancellation	Rating 7.4 9,335 reviews	Search United Airlines flights
Southwest	PriceFrom $258	Free Cancellation	Rating 8.0 4,298 reviews	Search Southwest flights
American Airlines	PriceFrom $278	Free Cancellation	Rating 7.2 11,334 reviews	Search American Airlines 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.