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Cheap flights from Ontario to District of Columbia from $64

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to District of Columbia departing on 3/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to District of Columbia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:40 am - 6:59 pm
ONT
-
DCA
7h 19m
1 stop
Frontier Logo
2:00 pm - 9:34 pm
DCA
-
ONT
10h 34m
1 stop
$145Frontier
Wed, Feb 25 - Wed, Mar 4
Frontier Logo
6:00 am - 9:59 pm
ONT
-
DCA
12h 59m
1 stop
Frontier Logo
2:00 pm - 9:34 pm
DCA
-
ONT
10h 34m
1 stop
$148Frontier
Sat, Feb 21 - Wed, Feb 25
Frontier Logo
8:35 am - 9:59 pm
ONT
-
DCA
10h 24m
1 stop
Frontier Logo
2:00 pm - 9:34 pm
DCA
-
ONT
10h 34m
1 stop
$155Frontier
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
1:30 pm - 1:24 am
ONT
-
IAD
8h 54m
1 stop
United Airlines Logo
3:15 pm - 10:30 pm
IAD
-
ONT
10h 15m
1 stop
$297United Airlines
Wed, May 13 - Wed, May 20
American Airlines Logo
5:02 pm - 8:48 am
ONT
-
IAD
12h 46m
2 stops
American Airlines Logo
6:00 am - 1:49 pm
IAD
-
ONT
10h 49m
1 stop
$302American Airlines
Sat, Feb 21 - Wed, Feb 25
Multiple Airlines Logo
6:15 am - 6:19 pm
ONT
-
IAD
9h 04m
1 stop
Multiple Airlines Logo
7:20 pm - 9:45 am
IAD
-
ONT
17h 25m
1 stop
$304Multiple Airlines
Thu, Apr 23 - Mon, Apr 27
Delta Logo
1:15 pm - 12:21 am
ONT
-
IAD
8h 06m
1 stop
Delta Logo
7:30 am - 1:54 pm
IAD
-
ONT
9h 24m
1 stop
$308Delta
Thu, Feb 19 - Wed, Feb 25
American Airlines Logo
9:24 am - 11:28 pm
ONT
-
IAD
11h 04m
2 stops
American Airlines Logo
5:55 pm - 10:35 pm
IAD
-
ONT
7h 40m
1 stop
$310American Airlines
Wed, Apr 15 - Wed, Apr 22
Multiple Airlines Logo
6:15 am - 6:19 pm
ONT
-
IAD
9h 04m
1 stop
Multiple Airlines Logo
7:20 pm - 2:19 pm
IAD
-
ONT
21h 59m
2 stops
$313Multiple Airlines
Thu, Apr 23 - Mon, Apr 27
Delta Logo
1:15 pm - 12:21 am
ONT
-
IAD
8h 06m
1 stop
Delta Logo
7:30 am - 1:54 pm
IAD
-
ONT
9h 24m
1 stop
$319Delta
Thu, Feb 19 - Mon, Feb 23

American Airlines flights from Ontario to District of Columbia

Our best American Airlines deals on Ontario to District of Columbia flight tickets
American Airlines
Feb 21
ONT5:02 pmOntario
12h 46m
2 stops
IAD8:48 amWashington, D.C. Dulles Intl
Feb 25
IAD6:00 amWashington, D.C. Dulles Intl
10h 49m
1 stop
ONT1:49 pmOntario
$302
American Airlines
Apr 15
ONT9:24 amOntario
11h 04m
2 stops
IAD11:28 pmWashington, D.C. Dulles Intl
Apr 22
IAD5:55 pmWashington, D.C. Dulles Intl
7h 40m
1 stop
ONT10:35 pmOntario
$310
American Airlines
Feb 19
ONT6:00 amOntario
7h 50m
1 stop
IAD4:50 pmWashington, D.C. Dulles Intl
Feb 25
IAD5:37 pmWashington, D.C. Dulles Intl
8h 12m
1 stop
ONT10:49 pmOntario
$312

Southwest flights from Ontario to District of Columbia

Our best Southwest deals on Ontario to District of Columbia flight tickets
Southwest
Apr 1
ONT6:15 amOntario
8h 05m
1 stop
IAD5:20 pmWashington, D.C. Dulles Intl
Apr 4
IAD5:50 amWashington, D.C. Dulles Intl
7h 15m
1 stop
ONT10:05 amOntario
$337
Southwest
Mar 10
ONT6:25 amOntario
6h 30m
1 stop
IAD3:55 pmWashington, D.C. Dulles Intl
Mar 10
IAD6:10 pmWashington, D.C. Dulles Intl
8h 00m
1 stop
ONT11:10 pmOntario
$377
Southwest
May 13
ONT10:55 amOntario
9h 45m
2 stops
IAD11:40 pmWashington, D.C. Dulles Intl
May 20
IAD6:20 amWashington, D.C. Dulles Intl
6h 55m
1 stop
ONT10:15 amOntario
$382

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to District of Columbia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 28, 2026.
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 2/25

8:40 am-6:59 pm

1 stop7h 19m

Washington, D.C. Reagan-National

Wed 3/4

2:00 pm-9:34 pm

1 stop10h 34m

$145

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 2/21

6:00 am-9:59 pm

1 stop12h 59m

Washington, D.C. Reagan-National

Wed 2/25

2:00 pm-9:34 pm

1 stop10h 34m

$148

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 2/24

8:35 am-9:59 pm

1 stop10h 24m

Washington, D.C. Reagan-National

Tue 3/3

2:00 pm-9:34 pm

1 stop10h 34m

$155

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 5/13

1:30 pm-1:24 am

1 stop8h 54m

Washington, D.C. Dulles Intl

Wed 5/20

3:15 pm-10:30 pm

1 stop10h 15m

$297

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 2/21

5:02 pm-8:48 am

2 stops12h 46m

Washington, D.C. Dulles Intl

Wed 2/25

6:00 am-1:49 pm

1 stop10h 49m

$302

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 4/23

6:15 am-6:19 pm

1 stop9h 04m

Washington, D.C. Dulles Intl

Mon 4/27

7:20 pm-9:45 am

1 stop17h 25m

$304

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 2/19

1:15 pm-12:21 am

1 stop8h 06m

Washington, D.C. Dulles Intl

Wed 2/25

7:30 am-1:54 pm

1 stop9h 24m

$308

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 4/15

9:24 am-11:28 pm

2 stops11h 04m

Washington, D.C. Dulles Intl

Wed 4/22

5:55 pm-10:35 pm

1 stop7h 40m

$310

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 4/23

6:15 am-6:19 pm

1 stop9h 04m

Washington, D.C. Dulles Intl

Mon 4/27

7:20 pm-2:19 pm

2 stops21h 59m

$313

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 2/19

1:15 pm-12:21 am

1 stop8h 06m

Washington, D.C. Dulles Intl

Mon 2/23

7:30 am-1:54 pm

1 stop9h 24m

$319

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to District of Columbia from

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

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 $226. If you don’t want to visit District of Columbia in September, then you should wait until May to fly from Ontario, when ticket prices are also cheap, with an average price of $231.

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 $480 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 46% 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 20m

Direct flights

None
The fastest flight from Ontario to District of Columbia takes 6h 20m
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?

  • 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 AirlinesPriceFrom $72Free CancellationRating
6.3
8,386 reviews
Search Spirit Airlines flights
FrontierPriceFrom $136Free CancellationRating
5.7
3,056 reviews
Search Frontier flights
DeltaPriceFrom $208Free CancellationRating
7.9
8,123 reviews
Search Delta flights
United AirlinesPriceFrom $226Free CancellationRating
7.4
9,208 reviews
Search United Airlines flights
SouthwestPriceFrom $258Free CancellationRating
8.0
4,268 reviews
Search Southwest flights
American AirlinesPriceFrom $278Free CancellationRating
7.2
11,201 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.

An easier way to manage your District of Columbia trip

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