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?

Southwest, Delta, and Alaska 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 March 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.

$79 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 - 4:59 pm

ONT

DCA

13h 00m

1 stop

1:59 pm - 11:55 pm

DCA

ONT

12h 56m

1 stop

$160Frontier

Tue, Apr 21 - Tue, Apr 28

12:59 am - 9:59 pm

ONT

DCA

18h 00m

1 stop

8:00 am - 11:55 pm

DCA

ONT

18h 55m

1 stop

$162Frontier

Wed, Apr 15 - Sat, Apr 18

12:59 am - 1:00 pm

ONT

DCA

9h 01m

1 stop

8:00 am - 7:31 am

DCA

ONT

26h 31m

1 stop

$167Frontier

Wed, Apr 22 - Sun, Apr 26

12:59 am - 9:59 pm

ONT

DCA

18h 00m

1 stop

8:00 am - 11:55 pm

DCA

ONT

18h 55m

1 stop

$171Frontier

Wed, Apr 15 - Tue, Apr 21

12:59 am - 1:00 pm

ONT

DCA

9h 01m

1 stop

1:59 pm - 11:55 pm

DCA

ONT

12h 56m

1 stop

$185Frontier

Wed, Apr 22 - Tue, Apr 28

12:59 am - 1:00 pm

ONT

DCA

9h 01m

1 stop

6:00 pm - 7:31 am

DCA

ONT

16h 31m

1 stop

$191Frontier

Mon, Apr 13 - Thu, Apr 30

12:59 am - 1:00 pm

ONT

DCA

9h 01m

1 stop

1:59 pm - 7:31 am

DCA

ONT

20h 32m

1 stop

$192Frontier

Mon, Apr 13 - Thu, Apr 16

12:59 am - 9:59 pm

ONT

DCA

18h 00m

1 stop

8:00 am - 7:31 am

DCA

ONT

26h 31m

1 stop

$196Frontier

Thu, Apr 23 - Sun, Apr 26

12:59 am - 9:59 pm

ONT

DCA

18h 00m

1 stop

8:00 am - 7:31 am

DCA

ONT

26h 31m

1 stop

$198Frontier

Wed, Apr 15 - Wed, Apr 22

6:20 am - 12:02 pm

ONT

DCA

26h 42m

1 stop

8:00 am - 11:55 pm

DCA

ONT

18h 55m

1 stop

$201Frontier

Fri, Apr 10 - Wed, Apr 15

Alaska Airlines flights from Ontario to District of Columbia

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

Alaska Airlines

Apr 28

ONT6:00 amOntario

9h 20m

1 stop

IAD6:20 pmWashington, D.C. Dulles Intl

May 6

IAD7:10 amWashington, D.C. Dulles Intl

29h 35m

1 stop

ONT9:45 amOntario

$327

Alaska Airlines

May 6

ONT3:24 pmOntario

11h 26m

1 stop

IAD5:50 amWashington, D.C. Dulles Intl

May 12

IAD7:10 amWashington, D.C. Dulles Intl

10h 22m

1 stop

ONT2:32 pmOntario

$337

Alaska Airlines

Apr 24

ONT3:26 pmOntario

23h 54m

1 stop

IAD6:20 pmWashington, D.C. Dulles Intl

Apr 27

IAD7:10 amWashington, D.C. Dulles Intl

29h 35m

1 stop

ONT9:45 amOntario

$347

Southwest flights from Ontario to District of Columbia

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

Southwest

Apr 21

ONT10:30 amOntario

10h 10m

2 stops

IAD11:40 pmWashington, D.C. Dulles Intl

Apr 28

IAD6:20 amWashington, D.C. Dulles Intl

11h 45m

2 stops

ONT3:05 pmOntario

$377

Southwest

Apr 2

ONT8:40 amOntario

7h 25m

1 stop

IAD7:05 pmWashington, D.C. Dulles Intl

Apr 6

IAD7:45 pmWashington, D.C. Dulles Intl

7h 25m

1 stop

ONT12:10 amOntario

$649

Southwest

Apr 2

ONT8:40 amOntario

7h 25m

1 stop

IAD7:05 pmWashington, D.C. Dulles Intl

Apr 6

IAD4:50 pmWashington, D.C. Dulles Intl

10h 20m

2 stops

ONT12:10 amOntario

$654

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

Tue 4/21

12:59 am-4:59 pm

1 stop13h 00m

Washington, D.C. Reagan-National

Tue 4/28

1:59 pm-11:55 pm

1 stop12h 56m

$160

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 4/15

12:59 am-9:59 pm

1 stop18h 00m

Washington, D.C. Reagan-National

Sat 4/18

8:00 am-11:55 pm

1 stop18h 55m

$162

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 4/22

12:59 am-1:00 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Sun 4/26

8:00 am-7:31 am

1 stop26h 31m

$167

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 4/15

12:59 am-9:59 pm

1 stop18h 00m

Washington, D.C. Reagan-National

Tue 4/21

8:00 am-11:55 pm

1 stop18h 55m

$171

Quickest round-trip

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 4/22

12:59 am-1:00 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Tue 4/28

1:59 pm-11:55 pm

1 stop12h 56m

$185

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 4/13

12:59 am-1:00 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Thu 4/30

6:00 pm-7:31 am

1 stop16h 31m

$191

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 4/13

12:59 am-1:00 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Thu 4/16

1:59 pm-7:31 am

1 stop20h 32m

$192

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 4/23

12:59 am-9:59 pm

1 stop18h 00m

Washington, D.C. Reagan-National

Sun 4/26

8:00 am-7:31 am

1 stop26h 31m

$196

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 4/15

12:59 am-9:59 pm

1 stop18h 00m

Washington, D.C. Reagan-National

Wed 4/22

8:00 am-7:31 am

1 stop26h 31m

$198

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 4/10

6:20 am-12:02 pm

1 stop26h 42m

Washington, D.C. Reagan-National

Wed 4/15

8:00 am-11:55 pm

1 stop18h 55m

$201

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

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 1% 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 30m
Direct flights	None

The fastest flight from Ontario to District of Columbia takes 6h 30m

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 March 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 8,538 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $136	Free Cancellation	Rating 5.7 3,020 reviews	Search Frontier flights
Delta	PriceFrom $172	Free Cancellation	Rating 7.9 8,317 reviews	Search Delta flights
United Airlines	PriceFrom $226	Free Cancellation	Rating 7.4 9,462 reviews	Search United Airlines flights
Southwest	PriceFrom $258	Free Cancellation	Rating 8.0 4,324 reviews	Search Southwest flights
American Airlines	PriceFrom $278	Free Cancellation	Rating 7.1 11,486 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.