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 47% of people opting to fly with this airline when traveling to District of Columbia. Keep in mind that there are 8 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?

Delta, Alaska Airlines, and United Airlines 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 July 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.

$98 Cheap Flights from Ontario to District of Columbia in 2026

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.

6:00 am - 12:51 pm

ONT

DCA

27h 51m

1 stop

7:00 am - 11:50 pm

DCA

ONT

19h 50m

1 stop

$314Frontier

Wed, Jul 29 - Wed, Aug 5

6:00 am - 9:59 pm

ONT

DCA

12h 59m

1 stop

1:59 pm - 11:50 pm

DCA

ONT

12h 51m

1 stop

$317Frontier

Fri, Aug 7 - Wed, Aug 12

7:05 am - 8:05 pm

ONT

IAD

10h 00m

1 stop

7:00 am - 12:16 pm

IAD

ONT

8h 16m

1 stop

$317Delta

Wed, Aug 5 - Tue, Aug 11

10:49 am - 9:59 pm

ONT

DCA

8h 10m

1 stop

6:00 pm - 11:50 pm

DCA

ONT

8h 50m

1 stop

$318Frontier

Mon, Jul 27 - Thu, Aug 20

3:40 pm - 8:04 am

ONT

IAD

13h 24m

1 stop

8:59 am - 4:22 pm

IAD

ONT

10h 23m

1 stop

$319Frontier

Tue, Aug 18 - Thu, Aug 20

6:00 am - 4:59 pm

ONT

DCA

7h 59m

1 stop

6:00 pm - 11:02 am

DCA

ONT

20h 02m

2 stops

$320Frontier

Mon, Aug 24 - Sun, Sep 6

6:00 am - 12:51 pm

ONT

DCA

27h 51m

1 stop

6:00 pm - 11:50 pm

DCA

ONT

8h 50m

1 stop

$321Frontier

Wed, Aug 12 - Thu, Aug 13

6:00 am - 9:58 pm

ONT

DCA

12h 58m

1 stop

6:00 pm - 11:55 pm

DCA

ONT

8h 55m

1 stop

$322Frontier

Wed, Sep 23 - Thu, Oct 1

10:49 am - 9:59 pm

ONT

DCA

8h 10m

1 stop

6:00 pm - 11:50 pm

DCA

ONT

8h 50m

1 stop

$323Frontier

Mon, Jul 27 - Sun, Aug 23

10:00 pm - 10:00 am

ONT

IAD

9h 00m

1 stop

7:00 am - 12:16 pm

IAD

ONT

8h 16m

1 stop

$329Delta

Fri, Jul 31 - Thu, Aug 13

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Delta flights from Ontario to District of Columbia

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

Delta

Aug 5

ONT7:05 amOntario

10h 00m

1 stop

IAD8:05 pmWashington, D.C. Dulles Intl

Aug 11

IAD7:00 amWashington, D.C. Dulles Intl

8h 16m

1 stop

ONT12:16 pmOntario

$317

Delta

Jul 31

ONT10:00 pmOntario

9h 00m

1 stop

IAD10:00 amWashington, D.C. Dulles Intl

Aug 13

IAD7:00 amWashington, D.C. Dulles Intl

8h 16m

1 stop

ONT12:16 pmOntario

$329

Delta

Sep 26

ONT12:17 pmOntario

8h 26m

1 stop

DCA11:43 pmWashington, D.C. Reagan-National

Sep 30

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

8h 07m

1 stop

ONT11:07 amOntario

$341

Alaska Airlines flights from Ontario to District of Columbia

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

Alaska Airlines

Sep 9

ONT12:12 pmOntario

8h 47m

1 stop

IAD11:59 pmWashington, D.C. Dulles Intl

Sep 15

IAD7:00 amWashington, D.C. Dulles Intl

10h 16m

1 stop

ONT2:16 pmOntario

$341

Alaska Airlines

Oct 22

ONT11:13 amOntario

9h 46m

1 stop

IAD11:59 pmWashington, D.C. Dulles Intl

Oct 26

IAD7:00 amWashington, D.C. Dulles Intl

9h 21m

1 stop

ONT1:21 pmOntario

$371

Alaska Airlines

Oct 16

ONT11:13 amOntario

9h 46m

1 stop

IAD11:59 pmWashington, D.C. Dulles Intl

Oct 19

IAD7:00 amWashington, D.C. Dulles Intl

9h 21m

1 stop

ONT1:21 pmOntario

$386

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

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 7/29

6:00 am-12:51 pm

1 stop27h 51m

Washington, D.C. Reagan-National

Wed 8/5

7:00 am-11:50 pm

1 stop19h 50m

$314

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 8/7

6:00 am-9:59 pm

1 stop12h 59m

Washington, D.C. Reagan-National

Wed 8/12

1:59 pm-11:50 pm

1 stop12h 51m

$317

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 8/5

7:05 am-8:05 pm

1 stop10h 00m

Washington, D.C. Dulles Intl

Tue 8/11

7:00 am-12:16 pm

1 stop8h 16m

$317

Quickest round-trip

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 7/27

10:49 am-9:59 pm

1 stop8h 10m

Washington, D.C. Reagan-National

Thu 8/20

6:00 pm-11:50 pm

1 stop8h 50m

$318

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 8/18

3:40 pm-8:04 am

1 stop13h 24m

Washington, D.C. Dulles Intl

Thu 8/20

8:59 am-4:22 pm

1 stop10h 23m

$319

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 8/24

6:00 am-4:59 pm

1 stop7h 59m

Washington, D.C. Reagan-National

Sun 9/6

6:00 pm-11:02 am

2 stops20h 02m

$320

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 8/12

6:00 am-12:51 pm

1 stop27h 51m

Washington, D.C. Reagan-National

Thu 8/13

6:00 pm-11:50 pm

1 stop8h 50m

$321

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 9/23

6:00 am-9:58 pm

1 stop12h 58m

Washington, D.C. Reagan-National

Thu 10/1

6:00 pm-11:55 pm

1 stop8h 55m

$322

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 7/27

10:49 am-9:59 pm

1 stop8h 10m

Washington, D.C. Reagan-National

Sun 8/23

6:00 pm-11:50 pm

1 stop8h 50m

$323

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Fri 7/31

10:00 pm-10:00 am

1 stop9h 00m

Washington, D.C. Dulles Intl

Thu 8/13

7:00 am-12:16 pm

1 stop8h 16m

$329

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, November 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 $97. If you don’t want to visit District of Columbia in November, then you should wait until June to fly from Ontario, when ticket prices are also cheap, with an average price of $105.

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 25% 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 55m
Direct flights	None

The fastest flight from Ontario to District of Columbia takes 6h 55m

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 July 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
Frontier	PriceFrom $169	Free Cancellation	Rating 5.6 2,803 reviews	Search Frontier flights
Delta	PriceFrom $172	Free Cancellation	Rating 7.8 8,469 reviews	Search Delta flights
United Airlines	PriceFrom $226	Free Cancellation	Rating 7.4 9,988 reviews	Search United Airlines flights
American Airlines	PriceFrom $256	Free Cancellation	Rating 7.1 11,806 reviews	Search American Airlines flights
Southwest	PriceFrom $258	Free Cancellation	Rating 8.0 4,244 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.