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Cheap flights from Ontario to District of Columbia from $60

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 2/24. 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
8:36 am - 1:15 pm
ONT
-
DCA
25h 39m
1 stop
Frontier Logo
2:00 pm - 9:34 pm
DCA
-
ONT
10h 34m
1 stop
$148Frontier
Tue, Feb 10 - Wed, Feb 18
Frontier Logo
8:40 am - 1:15 pm
ONT
-
DCA
25h 35m
1 stop
Frontier Logo
8:00 am - 9:34 pm
DCA
-
ONT
16h 34m
1 stop
$149Frontier
Wed, Feb 25 - Tue, Mar 3
Frontier Logo
6:05 am - 9:59 pm
ONT
-
DCA
12h 54m
1 stop
Frontier Logo
2:00 pm - 9:34 pm
DCA
-
ONT
10h 34m
1 stop
$159Frontier
Thu, Feb 26 - Tue, Mar 3
Frontier Logo
8:35 am - 1:15 pm
ONT
-
DCA
25h 40m
1 stop
Frontier Logo
8:00 am - 9:34 pm
DCA
-
ONT
16h 34m
1 stop
$160Frontier
Tue, Feb 24 - Wed, Mar 4
Alaska Airlines Logo
4:02 pm - 5:20 pm
ONT
-
IAD
22h 18m
1 stop
Alaska Airlines Logo
7:05 am - 11:32 pm
IAD
-
ONT
19h 27m
1 stop
$287Alaska Airlines
Wed, Feb 25 - Mon, Mar 2
United Airlines Logo
1:27 pm - 1:25 am
ONT
-
IAD
8h 58m
1 stop
United Airlines Logo
6:30 am - 12:14 pm
IAD
-
ONT
8h 44m
1 stop
$297United Airlines
Wed, Apr 15 - Wed, Apr 22
American Airlines Logo
9:24 am - 11:28 pm
ONT
-
IAD
11h 04m
2 stops
American Airlines Logo
3:17 pm - 9:06 pm
IAD
-
ONT
8h 49m
1 stop
$302American Airlines
Wed, Apr 15 - Wed, Apr 22
American Airlines Logo
9:59 am - 11:12 pm
ONT
-
IAD
10h 13m
2 stops
American Airlines Logo
11:30 am - 7:09 pm
IAD
-
ONT
10h 39m
2 stops
$307American Airlines
Wed, Feb 11 - Tue, Feb 17
Delta Logo
10:20 pm - 9:13 am
ONT
-
IAD
7h 53m
1 stop
Delta Logo
6:00 am - 12:02 pm
IAD
-
ONT
9h 02m
1 stop
$308Delta
Mon, Feb 23 - Sat, Feb 28
Delta Logo
10:20 pm - 1:34 pm
ONT
-
IAD
12h 14m
2 stops
Delta Logo
6:00 am - 12:02 pm
IAD
-
ONT
9h 02m
1 stop
$313Delta
Mon, Feb 23 - Sat, Feb 28

United Airlines flights from Ontario to District of Columbia

Our best United Airlines deals on Ontario to District of Columbia flight tickets
United Airlines
Apr 15
ONT1:27 pmOntario
8h 58m
1 stop
IAD1:25 amWashington, D.C. Dulles Intl
Apr 22
IAD6:30 amWashington, D.C. Dulles Intl
8h 44m
1 stop
ONT12:14 pmOntario
$297
United Airlines
Feb 3
ONT8:00 amOntario
9h 49m
1 stop
IAD8:49 pmWashington, D.C. Dulles Intl
Feb 10
IAD4:11 pmWashington, D.C. Dulles Intl
7h 47m
1 stop
ONT8:58 pmOntario
$543
United Airlines
Feb 4
ONT6:00 amOntario
10h 35m
1 stop
IAD7:35 pmWashington, D.C. Dulles Intl
Feb 8
IAD8:15 amWashington, D.C. Dulles Intl
7h 32m
1 stop
ONT12:47 pmOntario
$589

American Airlines flights from Ontario to District of Columbia

Our best American Airlines deals on Ontario to District of Columbia flight tickets
American Airlines
Apr 15
ONT9:24 amOntario
11h 04m
2 stops
IAD11:28 pmWashington, D.C. Dulles Intl
Apr 22
IAD3:17 pmWashington, D.C. Dulles Intl
8h 49m
1 stop
ONT9:06 pmOntario
$302
American Airlines
Feb 11
ONT9:59 amOntario
10h 13m
2 stops
IAD11:12 pmWashington, D.C. Dulles Intl
Feb 17
IAD11:30 amWashington, D.C. Dulles Intl
10h 39m
2 stops
ONT7:09 pmOntario
$307
American Airlines
Feb 12
ONT7:05 pmOntario
10h 43m
2 stops
IAD8:48 amWashington, D.C. Dulles Intl
Feb 17
IAD11:30 amWashington, D.C. Dulles Intl
10h 39m
2 stops
ONT7:09 pmOntario
$318

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 21, 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

Tue 2/10

8:36 am-1:15 pm

1 stop25h 39m

Washington, D.C. Reagan-National

Wed 2/18

2:00 pm-9:34 pm

1 stop10h 34m

$148

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 2/25

8:40 am-1:15 pm

1 stop25h 35m

Washington, D.C. Reagan-National

Tue 3/3

8:00 am-9:34 pm

1 stop16h 34m

$149

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 2/26

6:05 am-9:59 pm

1 stop12h 54m

Washington, D.C. Reagan-National

Tue 3/3

2:00 pm-9:34 pm

1 stop10h 34m

$159

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 2/24

8:35 am-1:15 pm

1 stop25h 40m

Washington, D.C. Reagan-National

Wed 3/4

8:00 am-9:34 pm

1 stop16h 34m

$160

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 2/25

4:02 pm-5:20 pm

1 stop22h 18m

Washington, D.C. Dulles Intl

Mon 3/2

7:05 am-11:32 pm

1 stop19h 27m

$287

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 4/15

1:27 pm-1:25 am

1 stop8h 58m

Washington, D.C. Dulles Intl

Wed 4/22

6:30 am-12:14 pm

1 stop8h 44m

$297

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

3:17 pm-9:06 pm

1 stop8h 49m

$302

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 2/11

9:59 am-11:12 pm

2 stops10h 13m

Washington, D.C. Dulles Intl

Tue 2/17

11:30 am-7:09 pm

2 stops10h 39m

$307

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Mon 2/23

10:20 pm-9:13 am

1 stop7h 53m

Washington, D.C. Dulles Intl

Sat 2/28

6:00 am-12:02 pm

1 stop9h 02m

$308

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Mon 2/23

10:20 pm-1:34 pm

2 stops12h 14m

Washington, D.C. Dulles Intl

Sat 2/28

6:00 am-12:02 pm

1 stop9h 02m

$313

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 $228.

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 $479 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 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?

  • 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
8,362 reviews
Search Spirit Airlines flights
FrontierPriceFrom $136Free CancellationRating
5.7
3,055 reviews
Search Frontier flights
DeltaPriceFrom $208Free CancellationRating
7.9
8,086 reviews
Search Delta flights
United AirlinesPriceFrom $226Free CancellationRating
7.4
9,190 reviews
Search United Airlines flights
SouthwestPriceFrom $258Free CancellationRating
8.0
4,266 reviews
Search Southwest flights
American AirlinesPriceFrom $278Free CancellationRating
7.2
11,172 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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