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 48% 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?

Frontier is the most popular carrier 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 August 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.

$114 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.

3:40 pm - 8:04 am

ONT

IAD

13h 24m

1 stop

6:00 am - 11:22 am

IAD

ONT

8h 22m

1 stop

$280Frontier

Thu, Aug 27 - Mon, Sep 14

8:17 am - 6:29 pm

ONT

IAD

7h 12m

1 stop

6:00 am - 11:22 am

IAD

ONT

8h 22m

1 stop

$282Frontier

Mon, Aug 31 - Thu, Sep 10

10:47 am - 4:00 pm

ONT

DCA

26h 13m

1 stop

6:00 pm - 11:47 pm

DCA

ONT

8h 47m

1 stop

$307Multiple Airlines

Wed, Sep 9 - Mon, Sep 14

3:40 pm - 5:01 am

ONT

IAD

10h 21m

1 stop

9:03 am - 7:03 pm

IAD

ONT

13h 00m

1 stop

$313Multiple Airlines

Tue, Sep 8 - Wed, Sep 9

7:20 am - 8:24 pm

ONT

IAD

10h 04m

1 stop

6:52 am - 11:47 am

IAD

ONT

7h 55m

1 stop

$351American Airlines

Wed, Sep 16 - Sat, Sep 26

10:25 am - 11:23 pm

ONT

IAD

9h 58m

1 stop

6:42 am - 1:30 pm

IAD

ONT

9h 48m

1 stop

$351American Airlines

Wed, Oct 7 - Wed, Oct 14

1:29 pm - 11:15 pm

ONT

IAD

6h 46m

1 stop

2:05 pm - 8:51 pm

IAD

ONT

9h 46m

1 stop

$351United Airlines

Wed, Nov 11 - Thu, Nov 19

1:18 pm - 11:19 pm

ONT

IAD

7h 01m

1 stop

5:15 pm - 10:35 pm

IAD

ONT

8h 20m

1 stop

$351United Airlines

Tue, Aug 25 - Tue, Sep 1

11:57 am - 12:15 am

ONT

IAD

9h 18m

1 stop

7:00 am - 12:10 pm

IAD

ONT

8h 10m

1 stop

$351Delta

Wed, Nov 18 - Thu, Nov 26

6:20 am - 8:03 pm

ONT

IAD

10h 43m

1 stop

3:00 pm - 9:59 pm

IAD

ONT

9h 59m

1 stop

$351Delta

Tue, Nov 3 - Mon, Nov 9

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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

Aug 27

ONT3:40 pmOntario

13h 24m

1 stop

IAD8:04 amWashington, D.C. Dulles Intl

Sep 14

IAD6:00 amWashington, D.C. Dulles Intl

8h 22m

1 stop

ONT11:22 amOntario

$280

Frontier

Sep 8

ONT3:40 pmOntario

10h 21m

1 stop

IAD5:01 amWashington, D.C. Dulles Intl

Sep 19

IAD12:30 pmWashington, D.C. Dulles Intl

7h 16m

1 stop

ONT4:46 pmOntario

$282

Frontier

Aug 27

ONT3:40 pmOntario

13h 24m

1 stop

IAD8:04 amWashington, D.C. Dulles Intl

Sep 15

IAD4:36 pmWashington, D.C. Dulles Intl

28h 40m

1 stop

ONT6:16 pmOntario

$285

Delta flights from Ontario to District of Columbia

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

Delta

Nov 4

ONT1:24 pmOntario

7h 11m

1 stop

IAD11:35 pmWashington, D.C. Dulles Intl

Nov 7

IAD6:13 amWashington, D.C. Dulles Intl

9h 09m

1 stop

ONT12:22 pmOntario

$351

Delta

Aug 27

ONT10:00 pmOntario

8h 20m

1 stop

IAD9:20 amWashington, D.C. Dulles Intl

Sep 2

IAD6:00 amWashington, D.C. Dulles Intl

7h 42m

1 stop

ONT10:42 amOntario

$352

Delta

Aug 27

ONT10:00 pmOntario

8h 20m

1 stop

IAD9:20 amWashington, D.C. Dulles Intl

Sep 2

IAD6:00 amWashington, D.C. Dulles Intl

7h 42m

1 stop

ONT10:42 amOntario

$353

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 - IAD

ONTIAD

Ontario

Thu 8/27

3:40 pm-8:04 am

1 stop13h 24m

Washington, D.C. Dulles Intl

Mon 9/14

6:00 am-11:22 am

1 stop8h 22m

$280

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Mon 8/31

8:17 am-6:29 pm

1 stop7h 12m

Washington, D.C. Dulles Intl

Thu 9/10

6:00 am-11:22 am

1 stop8h 22m

$282

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 9/9

10:47 am-4:00 pm

1 stop26h 13m

Washington, D.C. Reagan-National

Mon 9/14

6:00 pm-11:47 pm

1 stop8h 47m

$307

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 9/8

3:40 pm-5:01 am

1 stop10h 21m

Washington, D.C. Dulles Intl

Wed 9/9

9:03 am-7:03 pm

1 stop13h 00m

$313

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 9/16

7:20 am-8:24 pm

1 stop10h 04m

Washington, D.C. Dulles Intl

Sat 9/26

6:52 am-11:47 am

1 stop7h 55m

$351

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 10/7

10:25 am-11:23 pm

1 stop9h 58m

Washington, D.C. Dulles Intl

Wed 10/14

6:42 am-1:30 pm

1 stop9h 48m

$351

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 11/11

1:29 pm-11:15 pm

1 stop6h 46m

Washington, D.C. Dulles Intl

Thu 11/19

2:05 pm-8:51 pm

1 stop9h 46m

$351

Quickest round-trip

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 8/25

1:18 pm-11:19 pm

1 stop7h 01m

Washington, D.C. Dulles Intl

Tue 9/1

5:15 pm-10:35 pm

1 stop8h 20m

$351

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 11/18

11:57 am-12:15 am

1 stop9h 18m

Washington, D.C. Dulles Intl

Thu 11/26

7:00 am-12:10 pm

1 stop8h 10m

$351

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 11/3

6:20 am-8:03 pm

1 stop10h 43m

Washington, D.C. Dulles Intl

Mon 11/9

3:00 pm-9:59 pm

1 stop9h 59m

$351

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, September 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 $303. If you don’t want to visit District of Columbia in September, then you should wait until January to fly from Ontario, when ticket prices are also cheap, with an average price of $380.

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 46m
Direct flights	None

The fastest flight from Ontario to District of Columbia takes 6h 46m

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 August 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 $105	Free Cancellation	Rating 5.6 2,737 reviews	Search Frontier flights
Delta	PriceFrom $183	Free Cancellation	Rating 7.8 8,483 reviews	Search Delta flights
United Airlines	PriceFrom $226	Free Cancellation	Rating 7.4 10,058 reviews	Search United Airlines flights
Southwest	PriceFrom $276	Free Cancellation	Rating 8.0 4,227 reviews	Search Southwest flights
American Airlines	PriceFrom $278	Free Cancellation	Rating 7.1 11,842 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.